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US 4,376,570 AGranted
Microscope objective
AssigneeWarner Lambert Technologies, Inc.
InventorMilton H. Sussman
Life of this patent
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Abstract
A five component microscope objective has a numerical aperture of 1.25. When used with a telescope as described in U.S. Pat. No. 3,355,234 and an immersion oil, the objective provides a magnification of 100.times.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.
Claims2
A five-component microscope objective having an N.A. of 1.25 comprising a plano-convex doublet I, a concavo-convex singlet II, a biconvex doublet III, a biconvex doublet IV and a convex-concavo doublet V having the following parameters:
- ______________________________________ Radius Thickness Spacing Lens (R) (T) (S) ______________________________________ S.sub.1 = 0.148f R.sub.1 = .infin. T.sub.1 = 0.313f I R.sub.2 = -0.583f T.sub.2 = 1.469f R.sub.3 = -1.356f S.sub.2 = 0.011f R.sub.4 = -7.791f II T.sub.3 = 1.096f R.sub.5 = -3.448f S.sub.3 = 0.872f R.sub.6 = 7.582f T.sub.4 = 0.658f III R.sub.7 = 4.404f T.sub.5 = 2.632f R.sub. 8 = -4.404f S.sub.4 = 0.027f R.sub.9 = 12.084f T.sub.6 = 0.658f IV R.sub.10 = 3.284f T.sub.7 = 2.522f R.sub.11 = -9.956f S.sub.5 = 8.728f R.sub.12 = 78.162f T.sub.8 = 1.371f V R.sub.13 = -3.448f T.sub.9 = 0.828f R.sub.14 = 4.342f ______________________________________ Refractive Abbe Index No Lens (ND) (.nu.) ______________________________________ 1.53 <
- ND.sub.1 <
- 1.55 50<
- .nu..sub.1 <
- 52 I 1.87 <
- ND.sub.2 <
- 1.89 40 <
- .nu..sub.2 <
- 42 II 1.78 <
- ND.sub.3 <
- 1.80 46.5 <
- .nu..sub.3 <
- 48.5 1.77 <
- ND.sub.4 <
- 1.79 25<
- .nu..sub.4 <
- 27 III 1.43 <
- ND.sub.5 <
- 1.45 94.5 <
- .nu..sub.5 <
- 96.5 1.77 <
- ND.sub.6 <
- 1.79 25 <
- .nu..sub.6 <
- 27 IV 1.43 <
- ND.sub.7 <
- 1.45 94.5 <
- .nu..sub.7 <
- 96.5 1.77 <
- ND.sub.8 <
- 1.79 25 <
- .nu..sub.8 <
- 27 V 1.60 <
- ND.sub.9 <
- 1.62 43.5 <
- .nu..sub.9 <
- 45.5 ______________________________________ wherein f = 1.8 to 1.85 mm.
34 more elements
Dependencies are inferred from the claim text.