Objective lens system for microscopes

Details Objective lens system for microscopes Objective lens system for microscopes

1978-08-21

1980-11-11

Sacher, Paul A.

350215, G02B 962

Patent

active

042329418

ABSTRACT:
An objective lens system for microscopes which has a large numerical aperture and a long working distance and wherein the secondary spectrum is sufficiently minimized and curvature of field, coma, etc. are favorably corrected over a wide range of visual field. Said objective lens system comprises a first single-element or cemented doublet lens component and at least three lens components, i.e., two cemented meniscus lens components so arranged as to face their concave surfaces each other and a cemented three-element lens component.

REFERENCES:
patent: 3572902 (1971-03-01), Vetake
patent: 3925910 (1975-12-01), Matsubara

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