Microscope objective

Claim 2

A microscope objective comprising a first, second, third, fourth and fifth lens components, said first lens component being a thick negative meniscus lens arranged concave toward the object side, said second lens component being a positive meniscus lens arranged concave toward the object side, said third lens component being a positive cemented doublet, said fourth lens component being a positive cemented doublet, said fifth lens component being negative cemented meniscus doublet arranged concave toward the image side, said microscope objective satisfying the following conditions: ##EQU3## wherein reference symbol f represents the focal length of the lens system as a whole, reference symbols r 1 and r 2 respectively represent radii of curvature of respective surfaces of the first lens component, reference symbol r 5 represents the radius of curvature of the surface on the object side of the third lens component, reference symbols r 11 and r 13 respectively represent radii of curvature of the surface on the object side and surface on the image side of the fifth lens component, reference symbol d 1 represents the thickness of the first lens component, reference symbols d 11 and d 12 respectively represent thicknesses of respective lenses constituting the fifth lens component, reference symbol d 10 represents the airspace between the fourth and fifth lens components, reference symbol n 1 represents the refractive index of the first lens component, reference symbol n 3 represents the refractive index of the lens on the object side in the third lens component, reference symbols n 7 and n 8 respectively represent refractive indices of respective lenses constituting the fifth lens component, reference symbols ν 3 and ν 4 respectively represent Abbe's numbers of respective lenses constituting the third lens component, and reference symbols ν 5 and ν 6 respectively represent Abbe's numbers of respective lenses constituting the fourth lens component.

Claim 3

A microscope objective according to claim 1 further satisfying the following conditions: ##EQU4## wherein reference symbol f represents the focal length of the lens system as a whole, reference symbol r 4 represents the radius of curvature of the surface on the image side of the second lens component, reference symbol r 8 represents the radius of curvature of the surface on the object side of the fourth lens component, reference symbol n 2 represents the refractive index of the second lens component, and reference symbol n 5 represents the refractive index of the lens on the object side in the fourth lens component.

Claim 4

A microscope objective according to claim 1, in which said microscope objective has the following numerical data: ______________________________________ f = 1.0 N.A. = 0.7 β = -40X W.D = 0.1374 Petzval's sum = -0.090 r.sub.1 = -0.4820 d.sub.1 = 0.8512 n.sub.1 = 1.8044 ν.sub.1 = 39.6 r.sub.2 = -0.8883 d.sub.2 = 0.0252 r.sub.3 = -8.6970 d.sub.3 = 0.3976 n.sub.2 = 1.4925 ν.sub.2 = 81.9 r.sub.4 = -1.2888 d.sub.4 = 0.0345 r.sub.5 = 70.2367 d.sub.5 = 0.2101 n.sub.3 = 1.57501 ν.sub.3 = 41.5 r.sub.6 = 1.9721 d.sub.6 = 0.9118 n.sub.4 = 1.4925 ν.sub.4 = 81.9 r.sub.7 = -2.0299 d.sub.7 = 0.0537 r.sub.8 = -35.0845 d.sub.8 = 0.2182 n.sub.5 = 1.80741 ν.sub.5 = 31.6 r.sub.9 = 1.9211 d.sub.9 = 0.8296 n.sub.6 = 1.4925 ν.sub.6 = 81.9 r.sub.10 = -2.5774 d.sub.10 = 3.3850 r.sub.11 = 1.8502 d.sub.11 = 0.8023 n.sub.7 = 1.7200 ν.sub.7 = 42.1 r.sub.12 = -5.3865 d.sub.12 = 0.1801 n.sub.8 = 1.61484 ν.sub.8 = 51.2 r.sub.13 = 1.1815 ______________________________________ wherein reference symbol f represents the focal length of the lens system as a whole, reference symbols r 1 through r 13 respectively represent radii of curvature of respective lens surfaces, reference symbol d 1 through d 12 respectively represent thicknesses of respective lenses and airspaces between respective lenses, reference symbols n 1 through n 8 respectively represent refractive indices of respective lenses, and reference symbols ν 1 through ν 8 respectively represent Abbe's numbers of respective lenses.

Claim 5

A microscope objective according to claim 1, in which said microscope objective has the following numerical data: ______________________________________ f = 1.0 N.A. = 0.7 β = -40X W.D = 0.1775 Petzval's sum = -0.070 r.sub.1 = -0.6174 d.sub.1 = 1.1273 n.sub.1 = 1.8040 ν.sub.1 = 46.6 r.sub.2 = -1.0928 d.sub.2 = 0.0258 r.sub.3 = -7.9397 d.sub.3 = 0.4025 n.sub.2 = 1.4925 ν.sub.2 = 81.9 r.sub.4 = -1.5078 d.sub.4 = 0.0263 r.sub.5 = 225.0088 d.sub.5 = 0.2369 n.sub.3 = 1.57501 ν.sub.3 = 31.3 r.sub.6 = 2.1418 d.sub.6 = 0.8817 n.sub.4 = 1.43389 ν.sub.4 = 95.2 r.sub.7 = -2.1959 d.sub.7 = 0.0373 r.sub.8 = 11.9166 d.sub.8 = 0.2415 n.sub.5 = 1.8074 ν.sub.5 = 35.4 r.sub.9 = 2.4781 d.sub.9 = 0.6823 n.sub.6 = 1.4925 ν.sub.6 = 81.9 r.sub.10 = -5.4291 d.sub.10 = 4.2798 r.sub.11 = 2.2353 d.sub.11 = 1.0278 n.sub.7 = 1.72 ν.sub.7 = 42.7 r.sub.12 = -4.6592 d.sub.12 = 0.2486 n.sub.8 = 1.61484 ν.sub.8 = 51.8 r.sub.13 = 1.3126 ______________________________________ wherein reference symbol f represents the focal length of the lens system as a whole, reference symbols r 1 through r 13 respectively represent radii of curvature of respective lens surfaces, reference symbol d 1 through d 12 respectively represent thicknesses of respective lenses and airspaces between respective lenses, reference symbols n 1 through n 8 respectively represent refractive indices of respective lenses, and reference symbols ν 1 through ν 8 respectively represent Abbe's numbers of respective lenses.

Claim 6

A microscope objective according to claim 1, in which said microscope objective has the following numerical data: ______________________________________ f = 1.0 N.A. = 0.7 β = -40X W.D = 0.1787 Petzval's sum = -0.079 r.sub.1 = -0.6138 d.sub.1 = 1.1255 n.sub.1 = 1.8040 ν.sub.1 = 46.6 j -r.sub.2 = -1.1090 d.sub.2 = 0.0057 r.sub.3 = -10.8395 d.sub.3 = 0.3882 n.sub.2 = 1.4925 ν.sub.2 = 81.9 j -r.sub.4 = -1.5183 d.sub.4 = 0.0015 r.sub.5 = -16.4591 d.sub.5 = 0.2111 n.sub.3 = 1.57501 ν.sub.3 = 41.6 r.sub.6 = 1.9565 d.sub.6 = 0.8902 n.sub.4 = 1.4925 ν.sub.4 = 81.9 r.sub.7 = -2.3135 d.sub.7 = 0.0386 r.sub.8 = 18.3411 d.sub.8 = 0.2345 n.sub.5 = 1.80741 ν.sub.5 = 31.6 r.sub.9 = 2.3097 d.sub.9 = 0.7370 n.sub.6 = 1.4925 ν.sub.6 = 81.9 r.sub.10 = -4.1418 d.sub.10 = 4.4450 r.sub.11 = 2.2152 d.sub.11 = 1.0591 n.sub.7 = 1.72 ν.sub.7 = 48.6 r.sub.12 = -4.3117 d.sub.12 = 0.2558 n.sub.8 = 1.62041 ν.sub.8 = 60.3 r.sub.13 = 1.2984 ______________________________________ wherein reference symbol f represents the focal length of the lens system as a whole, reference symbols r 1 through r 13 respectively represent radii of curvature of respective lens surfaces, reference symbol d 1 through d 12 respectively represent thicknesses of respective lenses and airspaces between respective lenses, reference symbols n 1 through n 8 respectively represent refractive indices of respective lenses, and reference symbols ν 1 through ν 8 respectively represent Abb's numbers of respective lenses.

Claim 7

A microscope objective according to claim 1, in which said microscope objective has the following numerical data: ______________________________________ f = 1.0 N.A = 0.7 β0 = -40X W.D = 0.1793 Petzval's sum = -0.080 r.sub.1 = -0.6123 d.sub.1 = 1.1216 n.sub.1 = 1.8040 ν.sub.1 = 46.6 r.sub.2 = -1.1004 d.sub.2 = 0.0053 r.sub.3 = -11.9453 d.sub.3 = 0.3884 n.sub.2 = 1.4925 ν.sub.2 = 81.9 r.sub.4 = -1.5303 d.sub.4 = 0.0007 r.sub.5 = -13.5820 d.sub.5 = 0.2086 n.sub.3 = 1.57501 ν.sub.3 = 41.5 r.sub.6 = 1.9633 d.sub.6 = 0.8866 n.sub.4 = 1.4925 ν.sub.4 = 81.9 r.sub.7 = -2.3008 d.sub.7 = 0.0383 r.sub.8 = 18.3419 d.sub.8 = 0.2302 n.sub.5 = 1.80741 ν.sub.5 = 31.6 r.sub.9 = 2.3197 d.sub.9 = 0.7330 n.sub.6 = 1.4925 ν.sub.6 = 81.9 r.sub.10 = -4.0719 d.sub.10 = 4.4228 r.sub.11 = 2.1927 d.sub.11 = 1.0526 n.sub.7 = 1.72 ν.sub.7 = 48.6 r.sub.12 = -4.5524 d.sub.12 = 0.2520 n.sub.8 = 1.62041 ν.sub.8 = 60.3 r.sub.13 = 1.2908 ______________________________________ wherein reference symbol f represents the focal length of the lens system as a whole, reference symbols r 1 through r 13 respectively represent radii of curvature of respective lens surfaces, reference symbol d 1 through d 12 respectively represent thicknesses of respective lenses and airspaces between respective lenses, reference symbols n 1 through n 8 respectively represent refractive indices of respective lenses, and reference symbols ν 1 through ν 8 respectively represent Abbe's numbers of respective lenses.

Claim 8

A microscope objective according to claim 1, in which said microscope objective has the following numerical data: ______________________________________ f = 1.0 N.A = 0.7 β = -40X W.D = 0.1801 Petzval's sum = -0.079 r.sub.1 = -0.6121 d.sub.1 = 1.1176 n.sub.1 = 1.8040 ν.sub.1 = 46.6 r.sub.2 = -1.0892 d.sub.2 = 0.0243 r.sub.3 = -12.5765 d.sub.3 = 0.3783 n.sub.2 = 1.4925 ν.sub.2 = 81.9 r.sub.4 = -1.5447 d.sub.4 = 0.0243 r.sub.5 = -14.7577 d.sub.5 = 0.1969 n.sub.3 = 1.57501 ν.sub.3 = 41.5 r.sub.6 = 1.9544 d.sub.6 = 0.8805 n.sub.4 = 1.4925 ν.sub.4 = 81.9 r.sub.7 = -2.3255 d.sub.7 = 0.0385 r.sub.8 = 20.6541 d.sub.8 = 0.2252 n.sub.5 = 1.80741 ν.sub.5 = 31.6 r.sub.9 = 2.3318 d.sub.9 = 0.7320 n.sub.6 = 1.4925 ν.sub.6 = 81.9 r.sub.10 = -4.0870 d.sub.10 = 4.4418 r.sub.11 = 2.1639 d.sub.11 = 1.0616 n.sub.7 = 1.72 ν.sub.7 = 48.6 r.sub.12 = -5.1345 d.sub.12 = 0.2571 n.sub.8 = 1.62041 ν.sub.8 = 60.3 r.sub.13 = 1.2791 ______________________________________ wherein reference symbol f represents the focal length of the lens system as a whole, reference symbols r 1 through r 13 respectively represent radii of curvature of respective lens surfaces, reference symbol d 1 through d 12 respectively represent thicknesses of respective lenses and airspaces between respective lenses, reference symbols n 1 through n 8 respectively represent refractive indices of respective lenses, and reference symbols ν 1 through ν 8 respectively represent Abbe's numbers of respective lenses.

Claim 9

A microscope objective according to claim 1, in which said microscope objective has the following numerical data: ______________________________________ f = 1.0 N.A = 0.7 β = -40X W.D = 0.1608 Petzval's sum = -0.078 r.sub.1 = -0.5416 d.sub.1 = 0.9893 n.sub.1 = 1.8061 ν.sub.1 = 40.9 r.sub.2 = -0.9872 d.sub.2 = 0.0239 r.sub.3 = -6.7428 d.sub.3 = 0.4179 n.sub.2 = 1.4925 ν.sub.2 = 81.9 r.sub.4 = -1.3574 d.sub.4 = 0.0239 r.sub.5 = 13.4725 d.sub.5 = 0.3042 n.sub.3 = 1.58406 ν.sub.3 = 37.0 r.sub.6 = 1.8018 d.sub.6 = 0.8602 n.sub.4 = 1.4925 ν.sub.4 = 81.9 r.sub.7 = -2.3788 d.sub.7 = 0.0349 r.sub.8 = 276.3533 d.sub.8 = 0.2418 n.sub.5 = 1.80741 ν.sub.5 = 31.6 r.sub.9 = 2.1579 d.sub.9 = 0.6867 n.sub.6 = 1.4925 ν.sub.6 = 81.9 r.sub.10 = -3.5266 d.sub.10 = 4.0201 r.sub.11 = 1.9104 d.sub.11 = 0.7503 n.sub.7 = 1.72 ν.sub.7 = 42.1 r.sub.12 = -5.2779 d.sub.12 = 0.1912 n.sub.8 = 1.6223 ν.sub.8 = 53.2 r.sub.13 = 1.2313 ______________________________________ wherein reference symbol f represents the focal length of the lens system as a whole, reference symbols r 1 through r 13 respectively represent radii of curvature of respective lens surfaces, reference symbol d 1 through d 12 respectively represent thicknesses of respective lenses and airspaces between respective lenses, reference symbols n 1 through n 8 respectively represent refractive indices of respective lenses, and reference symbols ν 1 through ν 8 respectively represent Abbe's numbers of respective lenses.

Claim 10

A microscope objective according to claim 1, in which said microscope objective has the following numerical data: ______________________________________ f = 1.0 N.A. = 0.7 β = -40X W.D. = 0.1594 Petzval's sum = -0.074 r.sub.1 = -0.5000 d.sub.1 = 0.8896 n.sub.1 = 1.8061 ν.sub.1 = 40.9 r.sub.2 = -0.9081 d.sub.2 = 0.0237 r.sub.3 = -7.1807 d.sub.3 = 0.4323 n.sub.2 = 1.4925 ν.sub.2 = 81.9 r.sub.4 = -1.2718 d.sub.4 = 0.0237 r.sub.5 = 15.0770 d.sub.5 = 0.3704 n.sub.3 = 1.58406 ν.sub.3 = 37.0 r.sub.6 = 1.6894 d.sub.6 = 0.8565 n.sub.4 = 1.4925 ν.sub.4 = 81.9 r.sub.7 = -2.3253 d.sub.7 = 0.0346 r.sub.8 = 194.4296 d.sub.8 = 0.2061 n.sub. 5 = 1.80741 ν.sub.5 = 31.6 r.sub.9 = 2.1650 d.sub.9 = 0.6322 n.sub.6 = 1.4925 ν.sub.6 = 81.9 r.sub.10 = -3.3632 d.sub.10 = 3.9253 r.sub.11 = 1.8164 d.sub.11 = 0.6746 n.sub.7 = 1.72 ν.sub.7 = 42.1 r.sub.12 = -4.4908 d.sub.12 = 0.1201 n.sub.8 = 1.6223 ν.sub.8 = 52.9 r.sub.13 = 1.2045 ______________________________________ wherein reference symbol f represents the focal length of the lens system as a whole, reference symbols r 1 through r 13 respectively represent radii of curvature of respective lens surfaces, reference symbol d 1 through d 12 respectively respresent thicknesses of respective lenses and airspaces between respective lenses, reference symbols n 1 through n 8 respectively represent refractive indices of respective lenses, and reference symbols ν 1 through ν 8 respectively represent Abbe's numbers of respective lenses.

Claim 11

A microscope objective according to claim 1, in which said microscope objective has the following numerical data: ______________________________________ f = 1.0 N.A. = 0.7 β = -40X W.D. = 0.1604 Petzval's sum = -0.077 r.sub.1 = -0.5413 d.sub.1 = 1.0112 n.sub.1 = 1.8061 ν.sub.1 = 40.9 r.sub.2 = -0.9964 d.sub.2 = 0.0238 r.sub.3 = -7.8380 d.sub.3 = 0.3722 n.sub.2 = 1.4925 ν.sub.2 = 81.9 r.sub.4 = -1.3700 d.sub.4 = 0.0238 r.sub.5 = 11.8263 d.sub.5 = 0.2750 n.sub.3 = 1.58406 ν.sub.3 = 37.0 r.sub.6 = 1.7424 d.sub.6 = 0.9142 n.sub.4 = 1.4925 ν.sub.4 = 81.9 r.sub.7 = -2.4077 d.sub.7 = 0.0348 r.sub.8 = ∞ d.sub.8 = 0.2240 n.sub.5 = 1.80741 ν.sub.5 = 31.6 r.sub.9 = 2.1129 d.sub.9 = 0.7117 n.sub.6 = 1.4925 ν.sub.6 = 81.9 r.sub.10 = -3.5089 d.sub.10 = 3.9211 r.sub.11 = 1.8949 d.sub.11 = 0.6848 n.sub.7 = 1.72 ν.sub.7 = 42.1 r.sub.12 = -5.0874 d.sub.12 = 0.2144 n.sub.8 = 1.6223 ν.sub.8 = 53.2 r.sub.13 = 1.2292 ______________________________________ wherein reference symbol f represents the focal length of the lens system as a whole, reference symbols r 1 through r 13 respectively represent radii of curvature of respective lens surfaces, reference symbol d 1 through d 12 respectively represent thicknesses of respective lenses and airspaces between respective lenses, reference symbols n 1 through n 8 respectively represent refractive indices of respective lenses, and reference symbols ν 1 through ν 8 respectively represent Abbe's numbers of respective lenses.

Claim 12

A microscope objective according to claim 1, in which said microscope objective has the following numerical data: ______________________________________ f = 1.0 N.A. = 0.7 β = -40X W.D. = 0.1608 Petzval's sum = -0.078 r.sub.1 = -0.5420 d.sub.1 = 0.9919 n.sub.1 = 1.8061 ν.sub.1 = 25.8 r.sub.2 = -0.9896 d.sub.2 = 0.0239 r.sub.3 = -6.6031 d.sub.3 = 0.4225 n.sub.2 = 1.4925 ν.sub.2 = 81.9 r.sub.4 = -1.3593 d.sub.4 = 0.0024 r.sub.5 = 12.4704 d.sub.5 = 0.3109 n.sub.3 = 1.58406 ν.sub.3 = 39.6 r.sub.6 = 1.7989 d.sub.6 = 0.8657 n.sub.4 = 1.4925 ν.sub.4 = 81.9 r.sub.7 = -2.3880 d.sub.7 = 0.0349 r.sub.8 = 288.1485 d.sub.8 = 0.2459 n.sub. 5 = 1.80741 ν.sub.5 = 27.7 r.sub.9 = 2.1463 d.sub.9 = 0.6913 n.sub.6 = 1.4925 ν.sub.6 = 81.9 r.sub.10 = -3.5288 d.sub.10 = 4.0225 r.sub.11 = 1.9156 d.sub.11 = 0.7460 n.sub.7 = 1.72 ν.sub.7 = 43.0 r.sub.12 = -5.1341 d.sub.12 = 0.1869 n.sub.8 = 1.6223 ν.sub.8 = 50.0 r.sub.13 = 1.2355 ______________________________________ wherein reference symbol f represents the focal length of the lens system as a whole, reference symbols r 1 through r 13 respectively represent radii of curvature of respective lens surfaces, reference symbol d 1 through d 12 respectively represent thicknesses of respective lenses and airspaces between respective lenses, reference symbols n 1 through n 8 respectively represent refractive indices of respective lenses, and reference symbols ν 1 through ν 8 respectively represent Abbe's numbers of respective lenses.