US4373785A
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Microscope objective
Assignee: American Optical Corp
•
Filing: 1981-04-22
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Granted: 1983-02-15
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Expires: 2001-04-22
Abstract
Abstract A eight component, oil-immersion, apochromatic microscope objective has a numerical aperture of 1.30. When used with a telescope as described in U.S. Pat. No. 3,355,234, the objective provides a magnification of 100 X in an embodiment having a focal length of 1.824 mm and is well corrected for the usual chromatic image aberrations, spherical aberration, coma and astigmatism.
Inventors
- 👤 Arthur H. Shoemaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:09
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
252 words
An eight component, oil immersion apochromatic objective having an N.A. of 1.30 which has a plano-convex doublet I, a concavo-convex singlet II, a biconvex doublet III, a concavo-convex doublet IV, a convex-concavo doublet V, a biconvex doublet VI, a convex-concavo singlet VII and a concavo-convex doublet VIII having the parameters of the respective axial spacings (S 0 -S 8 ) in mm, radii (R 1 -R 22 ), in mm with a minus sign (-) indicating a center of curvature on the object side of the lens, thickness (T 1 -T 14 ) in mm, indices of refraction (ND 1 -ND 14 ) and Abbe numbers (ν 1 -ν 14 ) are absolute values, all being determined by the following table: ______________________________________
RefractiveAbbe
RadiusThicknessSpacingIndexNo
Lens(R)(T)(S)(ND)(ν)
______________________________________
S.sub.1 =0.154F
R.sub.1 =∞
T.sub.1 =0.313F1.535<ND.sub.1 <1.54550.5<ν.sub.1 <51.5
IR.sub.2 =-0.583F
T.sub.2 =1.568F1.88<ND.sub.2 <1.8941.5<ν.sub.2 <42.5
R.sub.3 =-1.356F
S.sub.2 =0.011F
R.sub.4 =-9.156F
IIT.sub.3 =1.118F1.78<ND.sub.3 <1.7950<ν.sub.3 <51
R.sub.5 =-3.632F
S.sub.3 =0.291F
R.sub.6 =8.123F
T.sub.4 =0.658F1.715<ND.sub.4 <1.72534<ν.sub.4 <35
IIIR.sub.7 =4.399F
T.sub.5 =2.577F1.43<ND.sub.5 <1.4495<ν.sub.5 <96
R.sub.8 =-4.399F
S.sub.4 =0.252F
R.sub.9 =-21.809F
T.sub.6 =0.658F1.65<ND.sub.6 <1.6639<ν.sub.6 <40
IVR.sub.10 =3.907F
T.sub.7 = 2.248F1.43<ND.sub.7 <1.4495<ν.sub.7 <96
R.sub.11 =7.204F
S.sub.5 =0.055F
R.sub.12 =5.212F
T.sub.8 =2.193F1.43<ND.sub.8 <1.4495<ν.sub.8 <96
VR.sub.13 =-5.869F
T.sub.9 =0.658F1.715<ND.sub.9 <1.72534<ν.sub.9 <35
R.sub.14 =10.204F
S.sub.6 =0.055F
R.sub.15 =6.014F
T.sub.10 =1.919F1.43<ND.sub.10 <1.4495<ν.sub.10 <96
VIR.sub.16 =-6.014F
T.sub.11 =0.658F1.715<ND.sub.11 <1.72534<ν.sub.11 <35
R.sub.17 =-6.014F
S.sub.7 =0.055F
R.sub.18 =6.272F
VIIT.sub.12 =2.193F1.62<ND.sub.12 <1.6346.5<ν.sub.12 <47.5
R.sub.19 =3.098F
S.sub.8 =1.069F
R.sub.20 =-2.209F
T.sub.13 =0.987F1.785<ND.sub.13 <1.79547<ν.sub.13 <48
VIIIR.sub.21 =3.410F
T.sub.14 =1.645F1.78<ND.sub.14 <1.7925.5<ν.sub. 14 <26.5
R.sub.22 =-5.943F
______________________________________ wherein R is 1.80 to 1.85 mm.
Claim 2
Dependent Claim
252 words
An eight component, oil immersion apochromatic objective having an N.A. of 1.30 which has a plano-convex doublet I, a concavo-convex singlet II, a biconvex doublet III, a concavo-convex doublet IV, a convex-concavo doublet V, a biconvex doublet VI, a convex-concavo singlet VII and a concavo-convex doublet VIII having the parameters of the respective axial spacings (S 0 -S 8 ) in mm, radii (R 1 -R 22 ), in mm with a minus sign (-) indicating a center of curvature on the object side of the lens, thickness (T 1 -T 14 ) in mm, indices of refraction (ND 1 -ND 14 ) and Abbe numbers (ν 1 -ν 14 ) are absolute values, all being determined by the following table: ______________________________________
RefractiveAbbe
RadiusThicknessSpacingIndexNo
Lens(R)(T)(S)(ND)(ν)
______________________________________
S.sub.1 =0.154F
R.sub.1 =∞
T.sub.1 =0.313F1.535<ND.sub.1 <1.54550.5<ν.sub.1 <51.5
IR.sub.2 =-0.583F
T.sub.2 =1.568F1.88<ND.sub.2 <1.8941.5<ν.sub.2 <42.5
R.sub.3 =-1.356F
S.sub.2 =0.011F
R.sub.4 =-9.156F
IIT.sub.3 =1.118F1.78<ND.sub.3 <1.7950<ν.sub.3 <51
R.sub.5 =-3.632F
S.sub.3 =0.291F
R.sub.6 =8.123F
T.sub.4 =0.658F1.715<ND.sub.4 <1.72534<ν.sub.4 <35
IIIR.sub.7 =4.399F
T.sub.5 =2.577F1.43<ND.sub.5 <1.4495<ν.sub.5 <96
R.sub.8 =-4.399F
S.sub.4 =0.252F
R.sub.9 =-21.809F
T.sub.6 =0.658F1.65<ND.sub.6 <1.6639<ν.sub.6 <40
IVR.sub.10 =3.907F
T.sub.7 = 2.248F1.43<ND.sub.7 <1.4495<ν.sub.7 <96
R.sub.11 =7.204F
S.sub.5 =0.055F
R.sub.12 =5.212F
T.sub.8 =2.193F1.43<ND.sub.8 <1.4495<ν.sub.8 <96
VR.sub.13 =-5.869F
T.sub.9 =0.658F1.715<ND.sub.9 <1.72534<ν.sub.9 <35
R.sub.14 =10.204F
S.sub.6 =0.055F
R.sub.15 =6.014F
T.sub.10 =1.919F1.43<ND.sub.10 <1.4495<ν.sub.10 <96
VIR.sub.16 =-6.014F
T.sub.11 =0.658F1.715<ND.sub.11 <1.72534<ν.sub.11 <35
R.sub.17 =-6.014F
S.sub.7 =0.055F
R.sub.18 =6.272F
VIIT.sub.12 =2.193F1.62<ND.sub.12 <1.6346.5<ν.sub.12 <47.5
R.sub.19 =3.098F
S.sub.8 =1.069F
R.sub.20 =-2.209F
T.sub.13 =0.987F1.785<ND.sub.13 <1.79547<ν.sub.13 <48
VIIIR.sub.21 =3.410F
T.sub.14 =1.645F1.78<ND.sub.14 <1.7925.5<ν.sub. 14 <26.5
R.sub.22 =-5.943F
______________________________________ wherein R is 1.80 to 1.85 mm.
Claim 3
Dependent Claim
114 words
The microscope objective according to claim 1 wherein F is 1.824, ND 1 is 1.540, ND 2 is 1.883, ND 3 is 1.786, ND 4 , ND 9 and ND 11 are 1.720, ND 5 , ND 7 , ND 8 and ND 10 are 1.434, ND 6 is 1.654, ND 12 is 1.624, ND 13 is 1.788, ND 14 is 1.784, ν 1 is 51.1, ν 2 is 40.8, ν 3 is 50.2, ν 4 , ν 9 and ν 11 are 34.6, ν 5 , ν 7 , ν 8 and ν 10 are 95.6, ν 6 is 39.6, ν 12 is 47, ν 13 is 47.4 and ν 14 is 26.1.
References Cited (Backward Citations)
US3355234A
Cited
US3700311A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-14 | 1986-08-16 | 1987-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-14 | 1990-08-16 | 1991-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-14 | 1994-08-16 | 1995-02-15 | $7700.00 | Window Closed / Lapsed |