Objective lens system for microscopes

Claim 2

An objective lens system for microscopes comprising a first meniscus lens component having a concave surface on the object side and positive refractive power, a second positive lens component, a third cemented meniscus lens component having a concave surface on the image side, a fourth cemented meniscus lens component having a concave surface on the object side, a fifth positive lens component and a sixth cemented three-element lens component, and said lens system satisfying the following conditions:

Claim 3

85>n 1 >1.70 (1) 100<(ν.sub.3 -ν.sub.4)+(ν.sub.6 -ν.sub.5)<103 (2) ##EQU3## 0.1f<d.sub.1 /n.sub.1 <0.3f (4) wherein the reference symbol d 1 represents thickness of the first lens component, the reference symbol n 1 designates refractive index of the first lens component, the reference symbols ν 3 , ν 4 , ν 5 and ν 6 denote Abbe's numbers of both the elements of the third lens component and both the elements of the fourth lens component respectively, the reference symbols θ 3 , θ 4 , θ 5 and θ 6 represent values of θ given by θ=(n g -n F )/(n F -n C ) for both the elements of the third lens component and both the elements of the fourth lens component respectively and the reference symbol f designates focal length of the lens system as a whole.

Claim 4

85>n 1 >1.70 (1) 100<(ν.sub.3 -ν.sub.4)+(ν.sub.6 -ν.sub.5)<103 (2) ##EQU3## 0.1f<d.sub.1 /n.sub.1 <0.3f (4) wherein the reference symbol d 1 represents thickness of the first lens component, the reference symbol n 1 designates refractive index of the first lens component, the reference symbols ν 3 , ν 4 , ν 5 and ν 6 denote Abbe's numbers of both the elements of the third lens component and both the elements of the fourth lens component respectively, the reference symbols θ 3 , θ 4 , θ 5 and θ 6 represent values of θ given by θ=(n g -n F )/(n F -n C ) for both the elements of the third lens component and both the elements of the fourth lens component respectively and the reference symbol f designates focal length of the lens system as a whole.

Claim 5

An objective lens system for microscopes according to claim 1 so adapted as to satisfy additionally the following conditions: 0.5<r.sub.7 /r.sub.5 <0.7 (5) 0.45<r.sub.8 /r.sub.10 <0.55 ##EQU4## wherein the reference symbols r.sub.1, r.sub.5, r.sub.7, r.sub.8 and r.sub.10 represent radii of curvature on the object side surface of the first lens component, the object side surface and image side surface of the third lens component, and the object side surface and image side surface of the fourth lens component respectively, the reference symbol n.sub.1 designates refractive index of the first lens component and the reference symbol f denotes focal length of the lens system as a whole.

Claim 6

An objective lens system for microscopes according to claim 1 having the following numerical data: ______________________________________ f = 1.0 N.A = 0.4 β = -10X W.D = 0.1329 r.sub.1 = -0.5294 d.sub.1 = 0.4089 n.sub.1 = 1.78472 ν.sub.1 = 25.71 r.sub.2 = -0.4307 d.sub.2 = 0.0109 r.sub.3 = 0.4276 d.sub.3 = 0.1254 n.sub.2 = 1.49700 ν.sub.2 = 81.60 r.sub.4 = -1.1198 d.sub.4 = 0.0055 r.sub.5 = 0.3756 d.sub.5 = 0.1336 n.sub.3 = 1.43389 ν.sub.3 = 95.15 r.sub.6 -0.5628 d.sub.6 = 0.1189 n.sub.4 = 1.74000 ν.sub.4 = 31.70 r.sub.7 = 0.2541 d.sub.7 = 0.2950 r.sub.8 = -0.2112 d.sub.8 = 0.1472 n.sub.5 = 1.61340 ν.sub.5 = 43.84 r.sub.9 = 6.7503 d.sub.9 = 0.1854 n.sub.6 = 1.49700 ν.sub.6 = 81.60 r.sub.10 = -0.3958 d.sub.10 = 0.0055 d.sub.11 = 0.2170. n.sub.7 = 1.70154 ν.sub.7 = 41.10 r.sub.12 = -0.7421 d.sub.12 = 0.0055 r.sub.13 = 2.8442 d.sub.13 = 0.1439 n.sub.8 = 1.64250 ν.sub.8 = 58.37 r.sub.14 = 0.8101 d.sub.14 = 0.2181 n.sub.9 = 1.43389 ν.sub.9 = 95.15 r.sub.15 = -0.8301 d.sub.15 = 0.1058 n.sub.10 = 1.61340 ν.sub.10 = 43.84 r.sub.16 = -3.5977 θ.sub.3 = 0.5373 θ.sub.4 = 0.5919 θ.sub.5 = 0.5624 θ.sub.6 = 0.539 ##STR11## ##STR12## ______________________________________ wherein the reference symbols r 1 through r 16 represent radii of curvature on the surfaces of the respective lens elements, the reference symbols d 1 through d 15 designate thicknesses of the respective lens elements and airspaces therebetween, the reference symbols n 1 through n 10 denote refractive indices of the respective lens elements, the reference symbols ν 1 through ν 10 represent Abbe's numbers of the respective lens elements and the reference symbol f represents focal length of the lens system as a whole.

Claim 7

An objective lens system for microscopes according to claim 1 having the following numerical data: ______________________________________ f = 1.0 N.A = 0.4 β = -10X W.D = 0.0594 r.sub.1 = -0.3134 d.sub.1 = 0.3334 n.sub.1 = 1.83400 ν.sub.1 = 37.19 r.sub.2 = -0.3221 d.sub.2 = 0.0047 r.sub.3 = 0.3980 d.sub.3 = 0.0689 n.sub.2 = 1.61800 ν.sub.2 = 63.38 r.sub.4 = -1.3758 d.sub.4 = 0.0047 r.sub.5 = 0.3176 d.sub.5 = 0.1139 n.sub.3 = 1.43389 ν.sub.3 = 95.15 r.sub.6 = -0.5555 d.sub.6 = 0.1749 n.sub.4 = 1.74000 ν.sub.4 = 31.70 r.sub.7 = 0.1767 d.sub.7 = 0.2366 r.sub.8 = -0.2089 d.sub.8 = 0.1682 n.sub.5 = 1.61340 ν.sub.5 = 43.84 r.sub.9 = 1.0102 d.sub.9 = 0.0913 n.sub.6 = 1.49700 ν.sub.6 = 81.60 r.sub.10 = -0.4309 d.sub.10 = 0.0248 r.sub.11 = 5.0559 d.sub.11 = 0.1263 n.sub.7 = 1.53256 ν.sub.7 = 45.91 r.sub.12 = -0.4836 d.sub.12 = 0.0047 r.sub.13 = 6.7301 d.sub.13 = 0.1942 n.sub.8 = 1.61340 ν.sub.8 = 43.84 r.sub.14 = 0.6681 d.sub.14 = 0.2792 n.sub.9 = 1.43389 ν.sub.9 = 95.15 r.sub.15 = -2.1199 d.sub.15 = 0.1015 n.sub.10 = 1.61340 ν.sub.10 = 43.84 r.sub.16 = -1.2523 θ.sub.3 = 0.5373 θ.sub.4 = 0.5919 θ.sub.5 = 0.5623 θ.sub.6 = 0.539 ##STR13## ##STR14## ______________________________________ wherein the reference symbols r 1 through r 16 represent radii of curvature on the surfaces of the respective lens elements, the reference symbols d 1 through d 15 designate thicknesses of the respective lens elements and airspaces therebetween, the reference symbols n 1 through n 10 denote refractive indices of the respective lens elements, the reference symbols ν 1 through ν 10 represent Abbe's numbers of the respective lens elements and the reference symbol f represents focal length of the lens system as a whole.

Claim 8

An objective lens system for microscopes according to claim 1 having the following numerical data: ______________________________________ f = 1.0 N.A = 0.4 β = -10X W.D = 0.0988 r.sub.1 = -0.3679 d.sub.1 = 0.2882 n.sub.1 = 1.78472 ν.sub.1 32 25.71 r.sub.2 = -0.3149 d.sub.2 = 0.0048 r.sub.3 = 0.5580 d.sub.3 = 0.0703 n.sub.2 = 1.49700 ν.sub.4 = 81.60 r.sub.4 = -0.6240 d.sub.4 = 0.0048 r.sub.5 = 0.2822 d.sub.5 = 0.1176 n.sub.3 = 1.43389 ν.sub.3 = 95.15 r.sub.6 = -0.8253 d.sub.6 = 0.1755 n.sub.4 = 1.74000 ν.sub.4 = 31.70 r.sub.7 = 0.1871 d.sub.7 = 0.2453 r.sub.8 = -0.1766 d.sub.8 = 0.1619 n.sub.5 = 1.61340 ν.sub.5 = 43.84 r.sub.9 = 2.9619 d.sub.9 = 0.1101 n.sub.6 = 1.49700 ν.sub.6 = 81.60 r.sub.10 = -0.3457 d.sub.10 = 0.0520 r.sub.11 = -2.9619 d.sub.11 = 0.1251 n.sub.7 = 1.63930 ν.sub.7 = 44.88 r.sub.12 = -0.5082 d.sub.12 = 0.0048 r.sub.13 = - 3.4302 d.sub.13 = 0.1942 n.sub.8 = 1.61340 ν.sub.8 = 43.84 r.sub.14 = 0.9256 d.sub.14 = 0.2818 n.sub.9 = 1.43389 ν.sub.9 = 95.15 r.sub.15 = -0.7013 d.sub.15 = 0.0934 n.sub.10 = 1.61340 ν.sub.10 = 43.84 r.sub.16 = -1.6404 θ.sub.3 = 0.5373 θ.sub.4 = 0.5919 θ.sub.5 = 0.5623 θ.sub.6 = 0.539 ##STR15## ##STR16## ______________________________________ wherein the reference symbols r 1 through r 16 represent radii of curvature on the surfaces of the respective lens elements, the reference symbols d 1 through d 15 designate thicknesses of the respective lens elements and airspaces therebetween, the reference symbols n 1 through n 10 denote refractive indices of the respective lens elements, the reference symbols ν 1 through ν 10 represent Abbe's numbers of the respective lens elements and the reference symbol f represents focal length of the lens system as a whole.

Claim 9

An objective lens system for microscopes according to claim 1 having the following numerical data: ______________________________________ f = 1.0 N.A = 0.4 β = -10X W.D = 0.1316 r.sub.1 = -0.4015 d.sub.1 = 0.2700 n.sub.1 = 1.83400 ν.sub.1 = 37.19 r.sub.2 = -0.3474 d.sub.2 = 0.0047 r.sub.3 = 0.7427 d.sub.3 = 0.0698 n.sub.2 = 1.61800 ν.sub.2 = 63.38 r.sub.4 = -0.6625 d.sub.4 = 0.0047 r.sub.5 = 0.2833 d.sub.5 = 0.1168 n.sub.3 = 1.43389 ν.sub.3 = 95.15 r.sub.6 = -0.9889 d.sub.6 = 0.1889 n.sub.4 = 1.74000 ν.sub.4 = 31.70 r.sub.7 = 0.1889 d.sub.7 = 0.2347 r.sub.8 = -0.1799 d.sub.8 = 0.1720 n.sub.5 = 1.61340 ν.sub.5 = 43.84 r.sub.9 = 3.1662 d.sub.9 = 0.1213 n.sub.6 = 1.49700 ν.sub.6 = 81.60 r.sub.10 = -0.3677 d.sub.10 = 0.0654 r.sub.11 = -3.0360 d.sub.11 = 0.1334 n.sub.7 = 1.63930 ν.sub.7 = 44.88 r.sub.12 = -0.5407 d.sub.12 = 0.0047 r.sub.13 = 3.2530 d.sub.13 = 0.1903 n.sub.8 = 1.61340 ν.sub.8 = 43.84 r.sub.14 = 0.8986 d.sub.14 = 0.2815 n.sub.9 = 1.43389 ν.sub.9 = 95.15 r.sub.15 = -0.8299 d.sub.15 = 0.0976 n.sub.10 = 1.61340 ν.sub.10 = 43.84 r.sub.16 = -1.8259 θ.sub.3 = 0.5373 θ.sub.4 = 0.5919 θ.sub.5 = 0.5623 θ.sub.6 = 0.539 ##STR17## ##STR18## ______________________________________ wherein the reference symbols r 1 through r 16 represent radii of curvature on the surfaces of the respective lens elements, the reference symbols d 1 through d 15 designate thicknesses of the respective lens elements and airspaces therebetween, the reference symbols n 1 through n 10 denote refractive indices of the respective lens elements, the reference symbols ν 1 through ν 10 represent Abbe's numbers of the respective lens elements and the reference symbol f represents focal length of the lens system as a whole.

Claim 10

An objective lens system for microscopes according to claim 1 having the following numerical data: ______________________________________ f = 1.0 N.A = 0.4 β = -10X W.D = 0.1859 r.sub.1 = -0.5430 d.sub.1 = 0.2793 n.sub.1 = 1.83400 ν.sub.1 = 37.19 r.sub.2 = -0.4589 d.sub.2 = 0.0052 r.sub.3 = 0.6334 d.sub.3 = 0.0775 n.sub.2 = 1.68600 ν.sub.2 = 49.16 r.sub.4 = -1.0351 d.sub.4 = 0.0052 r.sub.5 = 0.3401 d.sub.5 = 0.1293 n.sub.3 = 1.43389 ν.sub.3 = 95.15 r.sub.6 = -0.9055 d.sub.6 = 0.2021 n.sub.4 = 1.74000 ν.sub.4 = 31.70 r.sub.7 = 0.2134 d.sub.7 = 0.2448 r.sub.8 = -0.1940 d.sub.8 = 0.1668 n.sub.5 = 1.61340 ν.sub.5 = 43.84 r.sub. 9 = 2.6890 d.sub.9 = 0.1160 n.sub.6 = 1.49250 ν.sub.6 = 81.90 r.sub.10 = -0.3873 d.sub.10 = 0.0447 r.sub.11 = -5.5255 d.sub.11 = 0.1243 n.sub.7 = 1.74100 ν.sub.7 = 52.68 r.sub.12 = -0.5503 d.sub.12 = 0.0052 r.sub.13 = 3.6196 d.sub.13 = 0.2084 n.sub.8 = 1.64250 ν.sub.8 = 58.37 r.sub.14 = 0.7744 d.sub.14 = 0.3113 n.sub.9 = 1.49700 ν.sub.9 = 81.60 r.sub.15 = -0.4793 d.sub.15 = 0.1068 n.sub.10 = 1.50847 ν.sub.10 = 60.83 r.sub.16 = -8.2893 θ.sub.3 = 0.5373 θ.sub.4 = 0.5919 θ.sub.5 = 0.5623 θ.sub.6 = 0.5309 ##STR19## ##STR20## ______________________________________ wherein the reference symbols r 1 through r 16 represent radii of curvature on the surfaces of the respective lens elements, the reference symbols d 1 through d 15 designate thicknesses of the respective lens elements and airspaces therebetween, the reference symbols n 1 through n 10 denote refractive indices of the respective lens elements, the reference symbols ν 1 through ν 10 represent Abbe's numbers of the respective lens elements and the reference symbol f represents focal length of the lens system as a whole.