US5216545A — Objective lens system for microscopes

Claim 1

Independent Claim 85 words

An objective lens system for microscopes comprising: a plural number of lens components including a cemented doublet, wherein one of said lens components is disposed on the most object side and has a convex surface on the image side, and wherein at least one surface of the lens components is an aspherical surface that is convex toward the image side and has such a shape as to weaken the refractive power thereof as the portions of said aspherical surface are farther from the optical axis.

Claim 2

Dependent Claim 85 words

An objective lens system for microscopes comprising: a plural number of lens components including a cemented doublet, wherein one of said lens components is disposed on the most object side and has a convex surface on the image side, and wherein at least one surface of the lens components is an aspherical surface that is convex toward the image side and has such a shape as to weaken the refractive power thereof as the portions of said aspherical surface are farther from the optical axis.

Claim 3

Dependent Claim 97 words

An objective lens system from microscopes, comprising: a plural number of lens components including a cemented doublet, wherein one of said lens components is disposed on the most object side and has a convex surface on the image side thereof, wherein one of said objective lens system's lens surfaces is an aspherical surface that is concave toward the object side and has a shape so as to strengthen the refractive power thereof as portions of said aspherical surface are farther from the optical axis, and wherein a reference sphere of said aspherical surface has negative refractive power.

Claim 4

Dependent Claim 97 words

An objective lens system from microscopes, comprising: a plural number of lens components including a cemented doublet, wherein one of said lens components is disposed on the most object side and has a convex surface on the image side thereof, wherein one of said objective lens system's lens surfaces is an aspherical surface that is concave toward the object side and has a shape so as to strengthen the refractive power thereof as portions of said aspherical surface are farther from the optical axis, and wherein a reference sphere of said aspherical surface has negative refractive power.

Claim 5

Dependent Claim 81 words

An objective lens system for microscopes comprising: a plurality of lens components including a cemented doublet; wherein one of said lens components is on the most object side and has a convex surface of the image side; and wherein one of said lens components has a surface that is an aspherical surface convex toward the object side and has such a shape as to weaken the refractive power thereof as portions of said aspherical surface are farther from the optical axis.

Claim 6

Dependent Claim 81 words

An objective lens system for microscopes comprising: a plurality of lens components including a cemented doublet; wherein one of said lens components is on the most object side and has a convex surface of the image side; and wherein one of said lens components has a surface that is an aspherical surface convex toward the object side and has such a shape as to weaken the refractive power thereof as portions of said aspherical surface are farther from the optical axis.

Claim 7

Dependent Claim 93 words

An objective lens system for microscopes comprising: a plurality of lens components including a cemented doublet; wherein one of said lens components is on the most object side and has a convex surface on the image side; wherein one of said lens components has a surface that is an aspherical surface concave toward the image side and has such a shape as to strengthen the refractive power thereof as portions of said aspherical surface are farther from the optical axis; and wherein a reference sphere of said aspherical surface has negative refractive power.

Claim 8

Dependent Claim 93 words

An objective lens system for microscopes comprising: a plurality of lens components including a cemented doublet; wherein one of said lens components is on the most object side and has a convex surface on the image side; wherein one of said lens components has a surface that is an aspherical surface concave toward the image side and has such a shape as to strengthen the refractive power thereof as portions of said aspherical surface are farther from the optical axis; and wherein a reference sphere of said aspherical surface has negative refractive power.

Claim 9

Dependent Claim 105 words

An objective lens system for microscopes according to claim 1, 2, 3 or 4 wherein said lens component on the object side has an aspherical surface and said aspherical surface is so designed as to satisfy the following condition (1): 0.0005<|Δx/y.sub.A |<0.08 (1) wherein the reference symbol y A represents the maximum height of rays on said aspherical surface and the reference symbol Δx designates a deviation in the direction along the optical axis and the maximum height of ray on said aspherical surface between said aspherical surface and the spherical surface having the same curvature as that at the vertex of said aspherical surface.

Claim 10

Dependent Claim 111 words

An objective lens system for microscopes according to claim 5, wherein the lens component disposed on the most object side has a meniscus lens component satisfying the following conditions (2) and (3): 0.2<|r.sub.1 /D.sub.1 |<6.0 (2) D.sub.2 /f>0.1 (3) wherein the reference symbol r 1 represents a radius of curvature on the most object side surface of the meniscus lens component, the reference symbol D 1 designates distance as measured from an object to the object side surface of said meniscus lens component, the reference symbol D 2 denotes thickness of said meniscus lens component and the reference symbol f represents focal length of the objective lens system as a whole.

Claim 11

Dependent Claim 23 words

An objective lens system for microscopes according to claim 6, wherein said lens components arranged on the object side is a cemented doublet.

Claim 12

Dependent Claim 84 words

An objective lens system for microscopes according to claim 5 wherein one of the lens components is disposed on the image side and is a cemented doublet consisting of a positive lens element and a negative lens element, and is so designed as to satisfy the following condition (4): ν.sub.2p -ν.sub.2n >10 (4) wherein the reference symbols ν 2p and ν 2n represent Abbe's numbers of the positive lens element and the negative lens element respectively of said lens component on the image side.

Claim 13

Dependent Claim 115 words

An objective lens system for microscopes according to claim 1, 3, 3 or 4, wherein the lens component disposed on the most object side is a meniscus lens component satisfying the following conditions (2) and (3): 0.2<|r.sub.1 /D.sub.1 |<6.0 (2) D.sub.2 /f>0.1 (3) wherein the reference symbol r 1 represents a radius of curvature on the most object side surface of the meniscus lens component, the reference symbol D 1 designates distance as measured from an object to the object side surface of said meniscus lens component, the reference symbol D 2 denotes thickness of said meniscus lens component and the reference symbol f represents focal length of the objective lens system as a whole.

Claim 14

Dependent Claim 82 words

An objective lens system for microscopes according to claim 9 wherein one of the lens components is disposed on the image side and is a cemented doublet consisting of a positive lens element and a negative lens element, and is satisfying the following condition (4): ν.sub.2p -ν.sub.2n >10 (4) wherein the reference symbol ν 2p and ν 2n represent Abbe's numbers of the positive lens element and the negative lens element respectively of said lens component arranged on the extremely image side.

Claim 15

Dependent Claim 81 words

An objective lens system for microscopes according to claim 10 wherein one of the lens components is disposed on the image side and is a cemented doublet consisting of a positive lens element and a negative lens element, and satisfying the following condition (4): ν.sub.2p -ν.sub.2n >10 (4) wherein the reference symbols ν 2p and ν 2n represent Abbe's numbers of the positive lens element and the negative lens element respectively of said lens component arranged on the extremely image side.

Claim 16

Dependent Claim 129 words

An objective lens system for microscopes according to claim 1, 2, 3 or 4 wherein one of the lens components is disposed on the most image side and has a meniscus shape lens component concave toward the image side, said objective lens system comprises at least two aspherical surfaces, each of which satisfies the following condition (1'): 0.003<|Δx/y.sub.A |<0.3 (1') wherein the reference symbol y A represents a maximum height of a ray on said aspherical surface and the reference symbol Δx designates deviation in the direction along the optical axis and at the maximum height of ray on said aspherical surface between said aspherical surface and a spherical surface having the same curvature as that at the vertex of the spherical surface on contact with said aspherical surface.

Claim 17

Dependent Claim 73 words

An objective lens system for microscopes according to claim 12 satisfying the following conditions (5) and (6): 0.2<r.sub.n /f<8 (5) 0.2<r.sub.p /f<8 (6) wherein the reference symbols r p and r n represent radii of curvature on the object side surface and the image side surface respectively of the lens component arranged on the extremely image side, and the reference symbol f designates focal length of said objective lens system as a whole.

Claim 18

Dependent Claim 86 words

An objective lens system for microscopes according to claim 12 or 13 comprising, between the lens component extremely on the extremely object side and the lens component extremely on the extremely image side, a cemented lens component consisting of a positive lens element and a negative lens element and satisfying the following condition (7) ν.sub.p -ν.sub.n >10 (7) wherein the reference symbols ν p and ν n represent Abbe's numbers of the positive lens element and the negative lens element respectively of said cemented lens component.

Claim 19

Dependent Claim 80 words

An objective lens system for microscopes according to claim 13 comprising, between the lens component on the object side and the lens component on the image side, a cemented lens component consisting of a positive lens element and a negative lens element, and satisfying the following condition (7) ν.sub.p -ν.sub.n >10 (7) wherein the reference symbols ν p and ν n represent Abbe's numbers of the positive lens element and the negative lens element respectively of said cemented lens component.

Claim 20

Dependent Claim 20 words

An objective lens system for microscopes according to claim 1, 2, 3 or 4 having a least two aspherical surfaces.

Claim 21

Dependent Claim 93 words

An objective lens system for microscopes according to claim 16 wherein said aspherical surfaces satisfy the following condition (1'): 0.003<|Δx/y.sub.A |<0.3 (1') wherein the reference symbol Δx represents a deviation in the direction along the optical axis and at the maximum height of rays on each of said aspherical surfaces between said aspherical surface and the spherical surface having the same curvature as that at the vertex of a spherical surface in contact with said aspherical surface and the reference symbol y A designates the maximum height of ray on said aspherical surface.

Claim 22

Dependent Claim 111 words

An objective lens system for microscopes according to claim 9 wherein each of said aspherical surfaces and the two surface before and after said aspherical surface have spherical aberration coefficients satisfying the following condition (8): |(I.sub.s +I.sub.os)/2NA'|<4 (8) wherein the reference symbol I s represents a total sum of third order spherical aberration coefficients of the reference sphere of the aspherical surface and the two surfaces before and after said the aspherical surface, the reference symbol I os designates the spherical aberration coefficient of the third order of the portions of said aspherical surface deviated from the spherical surface, and the reference symbol NA' denotes numerical aperture on the image side.

Claim 23

Dependent Claim 55 words

An objective lens system for microscopes according to claim 16, 17 or 18 satisfying the following condition (9): 0.3<f.sub.1 /f<1.5 (9) wherein the reference symbol f represents focal length of said objective lens system as a whole and the reference symbol f 1 designates focal length of the lens component arranged on the object side.

Claim 24

Dependent Claim 95 words

An objective lens system for microscopes according to claim 19 satisfying the following conditions (10), (11) and (12): ν.sub.2p -ν.sub.2n >10 (10) n.sub.2n -n.sub.2p >0.05 (11) ##EQU6## wherein the reference symbols ν.sub.2p and ν.sub.2n represent Abbe's numbers of the positive lens element and the negative lens element respectively of said cemented doublet, the reference symbols n.sub.p and n.sub.n designate refractive indices of said positive lens element and said negative lens element respectively, and the reference symbol r.sub.p denotes radius of curvature on the air contacted surface of the positive lens element of said cemented doublet.

Claim 25

Dependent Claim 52 words

An objective lens system for microscopes according to claim 17, satisfying the following condition (9): 0.3<f.sub.1 /f<1.5 (9) wherein the reference symbol f represents focal length of said objective lens system as a whole and the reference symbol f 1 designates focal length of the lens component arranged on the objective side.

Claim 26

Dependent Claim 95 words

An objective lens system for microscopes according to claim 21 satisfying the following conditions (10), (11) and (12): ν.sub.2p -ν.sub.2n >10 (10) n.sub.2n -n.sub.2p >0.05 (11) ##EQU7## wherein the reference symbols ν.sub.2p and ν.sub.2n represent Abbe's numbers of the positive lens element and the negative lens element respectively of said cemented doublet, the reference symbols n.sub.p and n.sub.n designate refractive indices of said positive lens element and said negative lens element respectively, and the reference symbol r.sub.p denotes radius of curvature on the air contacted surface of the positive lens element of said cemented doublet.

Claim 27

Dependent Claim 22 words

An objective lens system for microscopes according to claim 17, wherein the lens component on the object side has positive refractive power.

Claim 28

Dependent Claim 50 words

An objective lens system for microscopes according to claim 17, satisfying the following condition (9): 0.3<f1/f<1.5 (9) wherein the reference symbol f represents focal length of said objective lens system as a whole and the reference symbol f1 designates focal length of the lens component arranged on the objective side.

Claim 29

Dependent Claim 95 words

An objective lens system for microscopes according to claim 24 satisfying the following conditions (10), (11) and (12): ν.sub.2p -ν.sub.2n >10 (10) n.sub.2n -n.sub.2p >0.05 (11) ##EQU8## wherein the reference symbols ν.sub.2p and ν.sub.2n represent Abbe's numbers of the positive lens element and the negative lens element respectively of said cemented doublet, the reference symbols n.sub.p and n.sub.n designate refractive indices of said positive lens element and said negative lens element respectively, and the reference symbol r.sub.p denotes radius of curvature on the air contacted surface of the positive lens element of said cemented doublet.

Claim 30

Dependent Claim 36 words

An objective lens system for microscopes according to claim 16, wherein at least one aspherical surface is arranged in each of the lens component on the object side and a lens component on the image side.

Claim 31

Dependent Claim 29 words

An objective lens system for microscopes according to claim 1, 2, 3 or 4, wherein said lens component disposed on the most object side has a plano-convex lens shape.

Claim 32

Dependent Claim 27 words

An objective lens system for microscopes according to claim 27 wherein a cemented doublet is on the image side of said lens component on the object side.

Claim 33

Dependent Claim 29 words

An objective lens system for microscopes according to claim 28, wherein a positive lens component is arranged between said lens complement on the object side and said cemented doublet.

Claim 34

Dependent Claim 23 words

An objective lens system for microscopes according to claim 1, 2, 3 or 4 wherein all of said lens components are cemented doublets.

Claim 35

Dependent Claim 46 words

An objective lens system for microscopes according to claim 1 comprising, a second aspherical surface which is convex toward the object side and has such a shape as to weaken refractive power thereof as portions of said second aspherical surface are farther from the optical axis.

Claim 36

Dependent Claim 46 words

An objective lens system for microscopes according to claim 31 comprising, a third aspherical surface which is concave toward the image side and has such a shape as to strengthen refractive power thereof as portions of said third aspherical surface are farther from the optical axis.

Claim 37

Dependent Claim 46 words

An objective lens system for microscopes according to claim 31 comprising, a third aspherical surface which is convex toward the object side and has such a shape as to weaken refractive power thereof as portions of said third aspherical surface are farther from the optical axis.

Claim 38

Dependent Claim 46 words

An objective lens system for microscopes according to claim 1 comprising, a second aspherical surface which is convex toward the image side and has such a shape as to weaken refractive power thereof as portions of said second aspherical surface are farther from the optical axis.

Claim 39

Dependent Claim 81 words

An objective lens system for microscopes comprising: a first lens component disposed on the most object side and having a convex surface on the image side; and a cemented doublet; wherein said first lens components has an aspherical surface which weakens the refractive power thereof as the portions of said aspherical surface are farther from the optical axis; and wherein a reference sphere of said aspherical surface has a positive refractive power and said aspherical surface satisfies the following condition (1):

Claim 40

Dependent Claim 81 words

An objective lens system for microscopes comprising: a first lens component disposed on the most object side and having a convex surface on the image side; and a cemented doublet; wherein said first lens components has an aspherical surface which weakens the refractive power thereof as the portions of said aspherical surface are farther from the optical axis; and wherein a reference sphere of said aspherical surface has a positive refractive power and said aspherical surface satisfies the following condition (1):

Claim 41

Dependent Claim 67 words

0005<|Δx/y A |<0.08 (1) wherein the reference symbol y A represents the maximum height of a ray on said aspherical surface and the reference symbol Δx designates deviation in a direction along the optical axis and the maximum height of a ray on said aspherical surface between said aspherical surface and a spherical surface having the same curvature as that at a vertex of said aspherical surface.

Claim 42

Dependent Claim 67 words

0005<|Δx/y A |<0.08 (1) wherein the reference symbol y A represents the maximum height of a ray on said aspherical surface and the reference symbol Δx designates deviation in a direction along the optical axis and the maximum height of a ray on said aspherical surface between said aspherical surface and a spherical surface having the same curvature as that at a vertex of said aspherical surface.

Claim 43

Dependent Claim 89 words

An objective lens system for microscopes comprising: a meniscus lens component disposed on the most object side and having a convex surface on the image side; and a cemented doublet; wherein at least one lens surfaces is an aspherical surface having such a shape as to weaken the refractive power thereof as the portions of said aspherical surface are farther from the optical axis; and wherein a reference sphere of said aspherical surface has a positive refractive power and said aspherical surface satisfies the following conditions (2) and (3):

Claim 44

Dependent Claim 89 words

An objective lens system for microscopes comprising: a meniscus lens component disposed on the most object side and having a convex surface on the image side; and a cemented doublet; wherein at least one lens surfaces is an aspherical surface having such a shape as to weaken the refractive power thereof as the portions of said aspherical surface are farther from the optical axis; and wherein a reference sphere of said aspherical surface has a positive refractive power and said aspherical surface satisfies the following conditions (2) and (3):

Claim 45

Dependent Claim 81 words

2<|r 1 /D 1 |<6.0 (2) D.sub.2 /f>0.1 (3) wherein the reference symbol r 1 represents a radius of curvature on the most object side surface of the meniscus lens component, the reference symbol D 1 designates distance as measured from an object to the object side surface of said meniscus lens component, the reference symbol D 2 denotes thickness of said meniscus lens component and the reference symbol f represents focal length of the objective lens system as a whole.

Claim 46

Dependent Claim 81 words

2<|r 1 /D 1 |<6.0 (2) D.sub.2 /f>0.1 (3) wherein the reference symbol r 1 represents a radius of curvature on the most object side surface of the meniscus lens component, the reference symbol D 1 designates distance as measured from an object to the object side surface of said meniscus lens component, the reference symbol D 2 denotes thickness of said meniscus lens component and the reference symbol f represents focal length of the objective lens system as a whole.

Claim 47

Dependent Claim 111 words

An objective lens system for microscopes comprising: a lens component disposed on the most object side having a convex surface on the image side; and a cemented doublet; wherein a lens components is disposed on the most image side and has a meniscus shape concave toward the image side; wherein said objective lens system comprises at least two aspherical surfaces, at least one of which has such a shape as to weaken the refractive power thereof as portions of said aspherical surface are farther from the optical axis; and wherein the reference sphere of said aspherical surface has a positive refractive power and said aspherical surface satisfies the following condition (1'):

Claim 48

Dependent Claim 111 words

An objective lens system for microscopes comprising: a lens component disposed on the most object side having a convex surface on the image side; and a cemented doublet; wherein a lens components is disposed on the most image side and has a meniscus shape concave toward the image side; wherein said objective lens system comprises at least two aspherical surfaces, at least one of which has such a shape as to weaken the refractive power thereof as portions of said aspherical surface are farther from the optical axis; and wherein the reference sphere of said aspherical surface has a positive refractive power and said aspherical surface satisfies the following condition (1'):

Claim 49

Dependent Claim 76 words

003<|Δx/y A |<0.3 (1') wherein the reference symbol Δx represents a deviation in a direction along the optical axis and at the maximum height of rays on each of said aspherical surfaces between said aspherical surface and a spherical surface having the same curvature as that at a vertex of a spherical surface in contact with said aspherical surface and the reference symbol y A designates the maximum height of a ray on said aspherical surface.

Claim 50

Dependent Claim 76 words

003<|Δx/y A |<0.3 (1') wherein the reference symbol Δx represents a deviation in a direction along the optical axis and at the maximum height of rays on each of said aspherical surfaces between said aspherical surface and a spherical surface having the same curvature as that at a vertex of a spherical surface in contact with said aspherical surface and the reference symbol y A designates the maximum height of a ray on said aspherical surface.

Claim 51

Dependent Claim 94 words

An objective lens system for microscopes comprising: a lens component disposed on the most object side and having a convex surface on the image side; and a cemented doublet; wherein said objective lens system comprises two aspherical surfaces, at least one of which has such a shape as to weaken the refractive power thereof as the portions of said aspherical surface are farther from the optical axis; wherein the reference sphere of said at least one aspherical surface has a positive refractive power; and wherein said objective lens system satisfies the following condition (9):

Claim 52

Dependent Claim 94 words

An objective lens system for microscopes comprising: a lens component disposed on the most object side and having a convex surface on the image side; and a cemented doublet; wherein said objective lens system comprises two aspherical surfaces, at least one of which has such a shape as to weaken the refractive power thereof as the portions of said aspherical surface are farther from the optical axis; wherein the reference sphere of said at least one aspherical surface has a positive refractive power; and wherein said objective lens system satisfies the following condition (9):

Claim 53

Dependent Claim 38 words

3<f 1 /f<1.5 (9) wherein the reference symbol f represent focal length of said objective lens system as a whole and the reference symbol f 1 designates focal length of the lens component disposed on the object side.

Claim 54

Dependent Claim 38 words

3<f 1 /f<1.5 (9) wherein the reference symbol f represent focal length of said objective lens system as a whole and the reference symbol f 1 designates focal length of the lens component disposed on the object side.

Claim 55

Dependent Claim 114 words

An objective lens system for microscopes comprising: a lens component disposed on the most object side and having a convex surface on the image side; and a cemented doublet; wherein said lens component disposed on the most object side has at least one aspherical surface; and wherein a lens component disposed on the most image side in said objective lens system also has at least one aspherical surface; and wherein said objective lens system comprises at least one aspherical surface having a shape as to weaken the refractive power thereof as portions of said aspherical surface are farther from the optical axis and a reference sphere of this aspherical surface has positive refractive power.

Claim 56

Dependent Claim 114 words

An objective lens system for microscopes comprising: a lens component disposed on the most object side and having a convex surface on the image side; and a cemented doublet; wherein said lens component disposed on the most object side has at least one aspherical surface; and wherein a lens component disposed on the most image side in said objective lens system also has at least one aspherical surface; and wherein said objective lens system comprises at least one aspherical surface having a shape as to weaken the refractive power thereof as portions of said aspherical surface are farther from the optical axis and a reference sphere of this aspherical surface has positive refractive power.

Claim 57

Dependent Claim 88 words

An objective lens system for microscopes comprising: a lens component disposed on the most object side having a convex surface on the image side; and a cemented doublet; wherein said lens component disposed on the most object side has an aspherical surface which has such a shape as to strengthen refractive power thereof as portions of said aspherical surface are farther from the optical axis; and wherein a reference sphere of said aspherical surface has a negative refractive power and said aspherical surface satisfies the following condition (1):

Claim 58

Dependent Claim 88 words

An objective lens system for microscopes comprising: a lens component disposed on the most object side having a convex surface on the image side; and a cemented doublet; wherein said lens component disposed on the most object side has an aspherical surface which has such a shape as to strengthen refractive power thereof as portions of said aspherical surface are farther from the optical axis; and wherein a reference sphere of said aspherical surface has a negative refractive power and said aspherical surface satisfies the following condition (1):

Claim 59

Dependent Claim 64 words

0005<|Δx/y A |<0.08 (1) wherein the reference symbol y A represents the maximum height of a ray on said aspherical surface and the reference symbol Δx designates deviation in a direction along the optical axis and maximum height of the ray on said aspherical surface between said aspherical surface and a spherical surface having the same curvature as a vertex of said aspherical surface.

Claim 60

Dependent Claim 64 words

0005<|Δx/y A |<0.08 (1) wherein the reference symbol y A represents the maximum height of a ray on said aspherical surface and the reference symbol Δx designates deviation in a direction along the optical axis and maximum height of the ray on said aspherical surface between said aspherical surface and a spherical surface having the same curvature as a vertex of said aspherical surface.

Claim 61

Dependent Claim 86 words

An objective lens system for microscopes comprising: a meniscus component disposed on the most object side having a convex surface on the image side; and a cemented doublet; wherein at least one lens surface is an aspherical surface having such a shape as to strengthen refractive power thereof as portions of said aspherical surface are farther from the optical axis, and a reference sphere of said aspherical surface has a negative refractive power; and wherein said objective lens system satisfies the following conditions (2) and (3):

Claim 62

Dependent Claim 86 words

An objective lens system for microscopes comprising: a meniscus component disposed on the most object side having a convex surface on the image side; and a cemented doublet; wherein at least one lens surface is an aspherical surface having such a shape as to strengthen refractive power thereof as portions of said aspherical surface are farther from the optical axis, and a reference sphere of said aspherical surface has a negative refractive power; and wherein said objective lens system satisfies the following conditions (2) and (3):

Claim 63

Dependent Claim 81 words

2<|r 1 /D 1 |<6.0 (2) D.sub.2 /f>0.1 (3) wherein the reference symbol r 1 represents a radius of curvature on the most object side surface of the meniscus lens component, the reference symbol D 1 designates distance as measured from an object to the object side surface of said meniscus lens component, the reference symbol D 2 denotes thickness of said meniscus lens component and the reference symbol f represents focal length of the objective lens systems as a whole.

Claim 64

Dependent Claim 81 words

2<|r 1 /D 1 |<6.0 (2) D.sub.2 /f>0.1 (3) wherein the reference symbol r 1 represents a radius of curvature on the most object side surface of the meniscus lens component, the reference symbol D 1 designates distance as measured from an object to the object side surface of said meniscus lens component, the reference symbol D 2 denotes thickness of said meniscus lens component and the reference symbol f represents focal length of the objective lens systems as a whole.

Claim 65

Dependent Claim 179 words

An objective lens system for microscopes comprising: a lens component disposed on the most object side having a convex surface on the image side; and a cemented doublet; wherein a lens component disposed on the image side has a meniscus shape concave toward the image side; wherein said objective lens system comprises at least two aspherical surfaces, at least one of which has a shape that strengthens refractive power thereof as portions of said aspherical surface are farther from the optical axis; and wherein the reference sphere of this aspherical surface has a negative refractive power and said aspherical surface satisfies the following condition (1'): 0.0003<|Δx/y.sub.A |<0.3 (1') wherein the reference symbol x represents a deviation in a direction along the optical axis and at a maximum height of rays on each of said aspherical surfaces between said aspherical surface and a spherical surface having the same curvature as that at a vertex of a spherical surface in contact with said aspherical surface and the reference symbol y A designates the maximum height of a rayon said aspherical surface.

Claim 66

Dependent Claim 179 words

An objective lens system for microscopes comprising: a lens component disposed on the most object side having a convex surface on the image side; and a cemented doublet; wherein a lens component disposed on the image side has a meniscus shape concave toward the image side; wherein said objective lens system comprises at least two aspherical surfaces, at least one of which has a shape that strengthens refractive power thereof as portions of said aspherical surface are farther from the optical axis; and wherein the reference sphere of this aspherical surface has a negative refractive power and said aspherical surface satisfies the following condition (1'): 0.0003<|Δx/y.sub.A |<0.3 (1') wherein the reference symbol x represents a deviation in a direction along the optical axis and at a maximum height of rays on each of said aspherical surfaces between said aspherical surface and a spherical surface having the same curvature as that at a vertex of a spherical surface in contact with said aspherical surface and the reference symbol y A designates the maximum height of a rayon said aspherical surface.

Claim 67

Dependent Claim 168 words

An objective lens system for microscopes comprising: a lens component disposed on the most object side having a convex surface on the image side; and a cemented doublet; wherein said objective lens system comprises at least two aspherical surfaces, at least one of which has a shape that strengthens refractive power thereof as portions of said aspherical surface are farther from the optical axis; and wherein the reference sphere of said at least one aspherical surface has a negative refractive power and said at least one aspherical surface satisfies the following condition (1'): 0.003<|Δx/y.sub.Z |<0.3 (1') wherein the reference symbol Δx represents a deviation in a direction along the optical axis and at a maximum height of rays on each of said aspherical surfaces between said aspherical surface and a spherical surface having the same curvature as that at a vertex of a spherical surface in contact with said aspherical surface and the reference symbol y A designates the maximum height of a ray on said aspherical surface.

Claim 68

Dependent Claim 168 words

An objective lens system for microscopes comprising: a lens component disposed on the most object side having a convex surface on the image side; and a cemented doublet; wherein said objective lens system comprises at least two aspherical surfaces, at least one of which has a shape that strengthens refractive power thereof as portions of said aspherical surface are farther from the optical axis; and wherein the reference sphere of said at least one aspherical surface has a negative refractive power and said at least one aspherical surface satisfies the following condition (1'): 0.003<|Δx/y.sub.Z |<0.3 (1') wherein the reference symbol Δx represents a deviation in a direction along the optical axis and at a maximum height of rays on each of said aspherical surfaces between said aspherical surface and a spherical surface having the same curvature as that at a vertex of a spherical surface in contact with said aspherical surface and the reference symbol y A designates the maximum height of a ray on said aspherical surface.

Claim 69

Dependent Claim 127 words

An objective lens system for microscopes comprising: a lens component disposed on the most object side and having a convex surface on the image side; and a cemented doublet; wherein said objective lens system comprises two aspherical surfaces, at least one of which has such a shape as to strengthen a refractive power thereof as portions of this aspherical surface are farther from the optical axis, wherein the reference sphere of this aspherical surface has a negative refractive power; and wherein said objective lens system satisfies the following condition (9): 0.3<f.sub.1 /f<1.5 (9) wherein the reference symbol f represents focal length of said objective lens system as a whole and the reference symbol f 1 designates focal length of the lens component arranged on the object side.

Claim 70

Dependent Claim 127 words

An objective lens system for microscopes comprising: a lens component disposed on the most object side and having a convex surface on the image side; and a cemented doublet; wherein said objective lens system comprises two aspherical surfaces, at least one of which has such a shape as to strengthen a refractive power thereof as portions of this aspherical surface are farther from the optical axis, wherein the reference sphere of this aspherical surface has a negative refractive power; and wherein said objective lens system satisfies the following condition (9): 0.3<f.sub.1 /f<1.5 (9) wherein the reference symbol f represents focal length of said objective lens system as a whole and the reference symbol f 1 designates focal length of the lens component arranged on the object side.

Claim 71

Dependent Claim 116 words

An objective lens system for microscopes comprising: a lens component disposed on the most object side and having a convex surface on the image side; and a cemented doublet; wherein said lens component disposed on the most object side has at least one aspherical surface and a lens components disposed on the most image side in said objective lens system also has at least one aspherical surface; and wherein said objective lens system comprises at least one aspherical surface with such a shape as to strengthen the refractive power thereof as the portions of said aspherical surface are farther from the optical axis and a reference sphere of this aspherical surface has a negative refractive power.

Claim 72

Dependent Claim 116 words

An objective lens system for microscopes comprising: a lens component disposed on the most object side and having a convex surface on the image side; and a cemented doublet; wherein said lens component disposed on the most object side has at least one aspherical surface and a lens components disposed on the most image side in said objective lens system also has at least one aspherical surface; and wherein said objective lens system comprises at least one aspherical surface with such a shape as to strengthen the refractive power thereof as the portions of said aspherical surface are farther from the optical axis and a reference sphere of this aspherical surface has a negative refractive power.

Claim 73

Dependent Claim 76 words

An objective lens system for microscopes comprising; a plano-convex lens component disposed on the most object side; and a cemented doublet disposed on an emergence side of said plano-convex lens component; wherein at least one lens surface is an aspherical surface having such a shape as to weaken refractive power thereof as portions of said aspherical surface are farther from the optical axis; and wherein a reference sphere of said aspherical surface has positive refractive power.

Claim 74

Dependent Claim 76 words

An objective lens system for microscopes comprising; a plano-convex lens component disposed on the most object side; and a cemented doublet disposed on an emergence side of said plano-convex lens component; wherein at least one lens surface is an aspherical surface having such a shape as to weaken refractive power thereof as portions of said aspherical surface are farther from the optical axis; and wherein a reference sphere of said aspherical surface has positive refractive power.

Claim 75

Dependent Claim 76 words

An objective lens system for microscopes comprising: a plano-convex lens component disposed on the most object side; and a cemented doublet disposed on an emergence side of said plano-convex lens component; wherein at least one lens surface is an aspherical surface having such a shape as to strengthen refractive power thereof as portions of said aspherical surface are farther from the optical axis, and wherein a reference sphere of said aspherical surface has negative refractive power.

Claim 76

Dependent Claim 76 words

An objective lens system for microscopes comprising: a plano-convex lens component disposed on the most object side; and a cemented doublet disposed on an emergence side of said plano-convex lens component; wherein at least one lens surface is an aspherical surface having such a shape as to strengthen refractive power thereof as portions of said aspherical surface are farther from the optical axis, and wherein a reference sphere of said aspherical surface has negative refractive power.

Claim 77

Dependent Claim 41 words

An objective lens system for microscopes comprising: a lens component disposed on the most object side and having a convex surface on the image side; and a cemented doublet having a cemented surface; wherein said cemented surface is an aspherical surface.

Claim 78

Dependent Claim 41 words

An objective lens system for microscopes comprising: a lens component disposed on the most object side and having a convex surface on the image side; and a cemented doublet having a cemented surface; wherein said cemented surface is an aspherical surface.

Claim 79

Dependent Claim 46 words

An objective lens system for microscopes according to claim 48 comprising, a second aspherical surface which is convex toward the image side and has such a shape as to weaken refractive power thereof as portions of said second aspherical surface are farther from the optical axis.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1996-05-31	1996-11-30	1997-06-01	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2000-05-31	2000-11-30	2001-06-01	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2004-05-31	2004-11-30	2005-06-01	$7700.00	Window Closed / Lapsed

Objective lens system for microscopes

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag