Chromatic aberration correcting objective lens system for inform

Details Chromatic aberration correcting objective lens system for inform Chromatic aberration correcting objective lens system for inform

1990-04-09

1993-05-25

Arnold, Bruce Y.

Optical: systems and elements

Lens

Eyepiece

359643, 359660, G02B 2500

Patent

active

052145379

ABSTRACT:
An objective lens system comprising four pieces lens arranged from a light source side, in order, a cemented lens which has a convex first lens and negative second lens cemented with each other, a convex third lens and a positive meniscus forth lens where convex surface thereof is faced toward the light source side.

REFERENCES:
patent: 3944339 (1976-03-01), Momiyama
patent: 4332442 (1982-06-01), Ookawa
patent: 4610515 (1986-09-01), Tanaka
English Language Abstract of JP 61-91612.
English Language Abstract of JP 51-18557.
English Abstract of Japanese Patent No. 57-74716.
English Abstract of Japanese Patent No. 62-35310.
English Abstract of Japanese Patent No. 60-232519.
English Abstract of Japanese Patent No. 58-72114.

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