Microscope objective lens with cemented biconvex triplet

Details Microscope objective lens with cemented biconvex triplet Microscope objective lens with cemented biconvex triplet

1996-12-04

1998-09-15

Sugarman, Scott J.

Optical: systems and elements

Lens

Microscope objective

359660, G02B 2102

Patent

active

058088075

ABSTRACT:
An objective lens system for a microscope having a power of .times.16 to .times.24 and including first, second and third lens groups, the first lens group being a comparatively thick meniscus lens component, the second lens group being a biconvex positive cemented triplet consisting of a biconvex first lens component, a biconcave second lens component and a biconvex third lens component, and a third lens group being a two lens system including a biconvex positive singlet and a negative thin meniscus lens component, or a negative and a positive thin meniscus lens components, or a positive cemented doublet, and having a relatively small number of lens elements, with its aberration (especially spherical, astigmatic difference, curvature of field and chromatic aberrations) being favorably corrected.

REFERENCES:
patent: 3822931 (1974-07-01), Matsubara
patent: 4232940 (1980-11-01), Nakagawa
patent: 4588264 (1986-05-01), Shimizu
patent: 5076676 (1991-12-01), Saito
patent: 5103341 (1992-04-01), Ulrich et al.
patent: 5121255 (1992-06-01), Hayashi
patent: 5469299 (1995-11-01), Nagano

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