Back to results
US 4,045,126 AGranted
Two-element microscope objective
AssigneeAmerican Optical Corporation
InventorArthur H. Shoemaker
Life of this patent
Estimating the term…
Abstract
A two-element objective having a numerical aperture of 0.10 in combination with a telescope objective as described in U.S. Pat. No. 3,355,234 and a typical 10.times. eyepiece has a magnification of 4.times. and a substantially flat 24mm image field.
Claims2
A microscope objective which has two elements aligned along an optical axis which comprises a biconcave negative doublet I and biconvex positive doublet II for the following optical parameters:
- ______________________________________ Index of Spacing Refrac- Lens Radius(R) Thickness(T) (S) tion(ND) No.(.gamma.) ______________________________________ S.sub.1 = .24167B R.sub.1 =-4.36334B T.sub.1 =.04651B 1.77<ND.sub.1 .gamma..sub.1 .congruent.25 <1.79 I R.sub.2 =- .25721B T.sub.2 =.04070B 1.51<ND.sub.2 .gamma..sub.2 .congruent.64 <1.53 R.sub.3 = .27059B S.sub.2 = .48271B R.sub.4 = .96467B T.sub.3 =.04070B 1.77<ND.sub.3 .gamma..sub.3 .congruent.25 <1.79 II R.sub.5 = .42024B T.sub.4 =.07558B 1.48<ND.sub.4 .gamma..sub.4 .congruent.70 <1.50 R.sub.6 =- .39640B ______________________________________
- wherein B is equal to 41 to 45mm.
Dependencies are inferred from the claim text.