Objective lens system for microscopes

Details Objective lens system for microscopes Objective lens system for microscopes

1978-08-24

1980-10-14

Sacher, Paul A.

350217, 350222, G02B 934, G02B 960

Patent

active

042277736

ABSTRACT:
An objective lens system for microscopes consisting of a front lens group comprising a positive lens component and a meniscus lens component having a concave surface on the image side, and a rear lens group comprising at least a meniscus cemented lens component, a positive lens component and at least one cemented three-element lens component. Said objective lens system is so designed as to have a large numerical aperture, secondary spectrum sufficiently minimized, a long working distance and curvature of field, coma etc. favorably corrected over a wide range of visual field.

REFERENCES:
patent: 2336207 (1943-12-01), Aklin
patent: 2611295 (1952-09-01), Schade
patent: 3572902 (1971-03-01), Uetake
patent: 3883231 (1975-05-01), Koizumi

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