Vibration-isolating optical system

Claim 2

A vibration-isolating optical system having an image stabilizing function, comprising: a fixed lens optical system having a plurality of lens groups which are arranged to be stationary in the vertical direction with respect to the optical axis; and a vibration-isolating compensating optical system disposed adjacently to the image of said fixed lens optical system and arranged to be movable in a direction intersecting said optical axis, wherein said vibration-isolating compensating optical system is constituted by, in sequence order from the portion adjacent to the object, a first factor formed by a double convex positive lens, a second factor formed by a negative lens whose concave confronts the object and a third factor formed by a positive lens, said vibration-isolating compensating optical system being arranged so as to meet the following relationships, assuming that the power (the reciprocal of the focal length) of the overall body of said vibration-isolating compensating optical system is φ, the power of said first factor is φ 1 , the power of said second factor is φ 2 and the combination power of said first factor and said second factor is φ 12 : ##EQU5##

Claim 3

A vibration-isolating optical system according to claim 1, wherein said second factor and said third factor are positioned so as to meet the following relationship, assuming that the width of an air layer positioned between said second factor and said third factor is D 2 : 0≦φ·D.sub.2 ≦0.1

Claim 4

A vibration-isolating optical system according to claim 1, wherein, assuming that the form factor of said second factor is q 2 , said second factor is constituted so as to meet the following relationship: 0.6<q.sub.2 <6 where said form factor q of the lens factor is expressed as follows: q=(rb+ra) / (rb-ra) where ra: the curvature radius of the surface of said lens factor confronting the object rb: the curvature radius of the surface of said lens factor confronting the image.

Claim 5

A vibration-isolating optical system according to claim 1, wherein said vibration-isolating compensating optical system is constituted so as to further meet the following relationship, assuming that the curvature radius of the surface of said third component which is nearest to the object is R l : ##EQU6##

Claim 6

A vibration-isolating optical system according to claim 1, said vibration-isolating compensating optical system is constituted so as to meet the following relationship, assuming that said third factor comprises a single positive lens, the Abbe's number of said first factor and said second factor are ν 1 and ν 2 respectively and the refractive index of said second factor and said third factor are N 2 and N 3 , respectively: ##EQU7##

Claim 7

A vibration-isolating optical system according to claim 5, wherein said first factor and said second factor are constituted so as to further meet the following relationship: φ.sub.12 ≦0

Claim 8

A vibration-isolating optical system according to claim 1, wherein said third factor is constituted by, in sequence order from the portion adjacent to the object, a negative lens whose surface confronting the image is concave and a positive lens whose surface confronting the object is convex.

Claim 9

A vibration-isolating optical system according to claim 1, wherein said fixed lens optical system of said vibration-isolating compensating optical system disposed adjacent to the object includes a lens group having a positive refracting power and a lens group having a negative refracting power, the overall body of said fixed lens optical system being constituted to be an afocal optical system.

Claim 10

A vibration-isolating optical system according to claim 1, wherein said fixed lens optical system of said vibration-isolating compensating optical system disposed adjacent to the object is constituted to be a substantially afocal power-variable system including, in sequence order from the portion adjacent to the object, a positive first-lens group, a negative second-lens group capable of moving along the optical axis for the purpose of performing zooming and a positive third-lens group and said vibration-isolating compensating optical system forms, together with said fixed lens optical system, a part of a zoom lens formed by four groups: a positive, a negative, a positive and a positive lens groups.

Claim 11

A vibration-isolating optical system according to claim 1 constituted in accordance with data shown in the following: ______________________________________ f = 297.0 FNo = 2.8 2ω = 8.3° r d Abbe n ______________________________________ 1 109.927 15.60 82.6 1.49782 2 13476.664 .30 3 114.120 16.50 82.6 1.49782 4 -473.430 3.70 5 -370.500 4.50 35.2 1.74950 6 307.534 35.98 7 83.463 2.30 53.9 1.71300 8 37.445 12.90 69.9 1.51860 9 179.291 3.01 10 221.841 7.60 33.9 1.80384 11 -81.907 1.90 60.7 1.60311 12 89.196 5.40 13 -140.000 1.90 52.3 1.74810 14 70.483 14.84 15 135.437 6.90 82.6 1.49782 16 -72.013 1.60 17 -51.654 6.50 28.6 1.79504 18 -207.775 5.50 19 336.248 5.60 31.6 1.75692 20 -66.780 38.35 21 ∞ 2.00 64.1 1.51680 22 ∞ Bf = 78.50 ______________________________________ where symbol r represents the curvature radius of each cf the lens surfaces, symbol d represents the interval between lens surfaces, symbols Abbe and symbol n respectively represent the Abbe's number and the refractive index with respect to the line d (λ=487.6 nm), numeral positioned at the left ends represent the order from the object, symbol f represents the focal distance of the overall body of the system, symbol FNO represents the F-number and symbol 2ω represents the field angle.

Claim 12

A vibration-isolating optical system according to claim 1 constituted in accordance with data shown in the following: ______________________________________ f = 297.0 FNo = 2.8 2ω = 8.3° r d Abbe n ______________________________________ 1 118.435 12.80 82.6 1.49782 2 943.895 .30 3 110.718 16.80 82.6 1.49782 4 -478.068 3.70 5 -401.348 4.50 28.3 1.72825 6 404.516 39.09 7 81.287 2.30 51.1 1.73350 8 37.600 12.90 64.1 1.51680 9 184.094 2.94 10 225.947 7.10 25.4 1.80518 11 -90.000 1.90 54.6 1.51454 12 83.993 5.40 13 -126.890 1.90 45.4 1.79668 14 71.318 15.17 15 120.509 6.90 82.6 1.49782 16 -83.026 1.70 17 -55.175 3.50 38.8 1.67163 18 -360.867 5.50 19 90000.000 3.00 45.0 1.74400 20 228.368 1.00 21 262.612 7.00 50.8 1.65844 22 -70.796 35.21 23 ∞ 2.00 64.1 1.51680 24 ∞ Bf = 78.99 ______________________________________ where symbol r represents the curvature radius of each of the lens surfaces, symbol d represents the interval between lens surfaces, symbols Abbe and symbol n respectively represent the Abbe's number and the refractive index with respect to the line d (λ=487.6 nm), numeral positioned at the left ends represent the order from the object, symbol f represents the focal distance of the overall body of the system, symbol FNO represents the F-number and symbol 2ω represents the field angle.

Claim 13

A vibration-isolating optical system according to claim 1 constituted in accordance with data shown in the following: ______________________________________ f = 297.0 FNo = 2.8 2ω = 8.3° r d Abbe n ______________________________________ 1 110.846 15.60 82.6 1.49782 2 6000.000 .30 3 117.512 16.50 82.6 1.49782 4 -437.495 3.70 5 -351.000 4.50 35.2 1.74950 6 348.474 36.13 7 105.163 2.30 53.9 1.71300 8 35.896 14.40 67.9 1.59319 9 200.588 3.01 10 224.264 7.60 33.9 1.80384 11 -81.000 1.90 58.5 1.61272 12 91.256 5.40 13 -141.300 1.90 52.3 1.74810 14 70.821 14.85 15 103.002 6.90 82.6 1.49782 16 -108.000 5.60 17 -60.197 3.00 32.2 1.67270 18 -413.521 5.50 19 1607.481 3.50 45.0 1.74400 20 60.000 9.20 42.0 1.66755 21 -71.253 38.35 22 ∞ 2.00 64.1 1.51680 23 ∞ Bf = 70.06 ______________________________________ where symbol r represents the curvature radius of each of the lens surfaces, symbol d represents the interval between lens surfaces, symbols Abbe and symbol n respectively represent the Abbe's number and the refractive index with respect to the line d (λ=487.6 nm), numeral positioned at the left ends represent the order from the object, symbol f represents the focal distance of the overall body of the system, symbol FNO represents the F-number and symbol 2ω represents the field angle.

Claim 14

A vibration-isolating optical system according to claim 1 constituted in accordance with data shown in the following: ______________________________________ f = 297.0 FNo = 2.8 2ω = 8.3° r d Abbe n ______________________________________ 1 114.835 17.60 82.6 1.49782 2 2387.746 .30 3 105.979 18.10 82.6 1.49782 4 -393.398 3.50 5 -328.200 4.70 35.2 1.74950 6 386.924 30.50 7 83.383 2.20 55.6 1.69680 8 38.417 15.00 70.4 1.48749 9 203.746 2.52 10 412.244 8.40 33.9 1.80384 11 -81.738 2.00 60.7 1.60311 12 94.919 5.10 13 -190.000 2.00 52.3 1.74809 14 65.477 14.10 15 172.821 9.50 82.6 1.49782 16 -43.803 6.50 33.9 1.80384 17 -498.867 5.50 18 425.192 5.60 31.6 1.75692 19 -85.107 37.70 20 ∞ 2.00 64.1 1.51680 21 ∞ Bf = 80.97 ______________________________________ where symbol r represents the curvature radius of each of the lens surfaces, symbol d represents the interval between lens surfaces, symbols Abbe and symbol n respectively represent the Abbe's number and the refractive index with respect to the line d (λ=487.6 nm), numeral positioned at the left ends represent the order from the object, symbol f represents the focal distance of the overall body of the system, symbol FNO represents the F-number and symbol 2ω represents the field angle.

Claim 15

A vibration-isolating optical system having an image stabilizing function, comprising: a fixed lens optical system having a plurality of lens groups which are arranged to be stationary in the vertical direction with respect to the optical axis; and a vibration-isolating compensating optical system disposed adjacently to the image of said fixed lens optical system and arranged to be movable in a direction intersecting said optical axis relative to the center of rotation determined to be at least a point on said optical axis, wherein said vibration isolating optical system is constituted so as to meet the following relationship, assuming that the overall length from the surface of said lens of said vibration-insulating compensating optical system which is nearest to the object to the surface of said lens which is nearest to the image is l, the distance from said center of rotation of said vibration-insulating compensating optical system to the position of the rear principal point of said vibration insulating compensating optical system is Lp and the maximum vibration insulating compensated quantity on the image surface is Δy: |Lp|>|Δy|·l

Claim 16

A vibration-isolating optical system having an image stabilizing function, comprising: a fixed lens optical system having a plurality of lens groups which are arranged to be stationary in the vertical direction with respect to the optical axis; and a vibration-isolating compensating optical system disposed adjacently to the image of said fixed lens optical system and arranged to be movable in a direction intersecting said optical axis relative to the center of rotation determined to be at least a point on said optical axis, wherein said vibration isolating optical system is constituted so as to meet the following relationship, assuming that the overall length from the surface of said lens of said vibration-insulating compensating optical system which is nearest to the object to the surface of said lens which is nearest to the image is l, the distance from said center of rotation of said vibration-insulating compensating optical system to the position of the rear principal point of said vibration insulating compensating optical system is Lp and the maximum vibration insulating compensated quantity on the image surface is Δy: |Lp|>|Δy|·l

Claim 17

A vibration insulating optical system according to claim 14, wherein said vibration isolating compensating optical system is constituted so as to be rotationally displaced in a plane centering an optional point on said optical axis opposing to said rear principal point of said vibrating insulating compensating optical system and including the optical axis with respect to the central position of the overall length of said vibration-insulating compensating optical system.

Claim 18

A vibration insulating optical system according to claim 14, wherein said vibration insulating compensating optical system is constituted by, in sequence order from the portion adjacent to the object, a first factor formed by a double convex positive lens, a second factor formed by a negative lens whose concave confronts the object and a third factor including at least a positive lens factor.

Claim 19

A vibration insulating optical system according to claim 16, wherein said vibration insulating compensating optical system is constituted so as to meet the following relationship, assuming that the power (the reciprocal of the focal length) of the overall body of said vibration-isolating compensating optical system is φ and the combination of the power of said first factor and said second factor is φ 12 : ##EQU8##

Claim 20

A vibration-insulating optical system according to claim 14 constituted in accordances with data shown in the following: ______________________________________ f = 297.0 FNo = 2.8 2ω = 8.3° r d Abbe n ______________________________________ 1 112.780 17.60 82.6 1.49782 2 2634.455 .30 3 108.261 18.10 82.6 1.49782 4 -397.703 3.50 5 -332.243 4.70 35.2 1.74950 6 383.650 28.87 7 84.625 2.20 55.6 1.69680 8 38.764 15.00 70.4 1.48749 9 210.869 4.00 10 471.818 8.40 33.9 1.80384 11 -78.537 2.00 60.7 1.60311 12 98.621 5.10 13 -159.458 2.00 52.3 1.74810 14 69.682 13.90 15 146.361 6.90 69.9 1.51860 16 -69.719 1.60 17 -50.689 6.50 25.4 1.80518 18 -200.551 5.50 19 -295.108 5.60 28.2 1.74000 20 -64.433 39.20 21 ∞ 2.00 64.1 1.51680 22 ∞ Bf = 77.67 ______________________________________ where symbol r represents the curvature radius of each of the lens surfaces, symbol d represents the interval between lens surfaces, symbols Abbe and symbol n respectively represent the Abbe's number and the refractive index with respect to the line d (λ=487.6 nm), numeral positioned at the left ends represent the order from the object, symbol f represents the focal distance of the overall body of the system, symbol FNO represents the F-number and symbol 2ω represents the field angle.