Optical device capable of maintaining pupil imaging

Details Optical device capable of maintaining pupil imaging Optical device capable of maintaining pupil imaging

1987-09-04

1989-05-16

Rosenberger, Richard A.

Optics: measuring and testing

By alignment in lateral direction

With light detector

356401, G01B 1100, G02B 1322

Patent

active

048304999

ABSTRACT:
An optical device includes an objective lens, a relay lens group for relaying the beam from the objective lens, and a compensator for compensating the variation in the optical path length, which occurs when the relative position between said objective lens and said relay lens group changes, by expanding or contracting the optical path.

REFERENCES:
patent: 3346739 (1967-10-01), Jenkner
patent: 3709602 (1973-01-01), Satomi
patent: 4062623 (1977-12-01), Suzuki et al.
patent: 4173398 (1979-11-01), Okamoto et al.
patent: 4251129 (1981-02-01), Suzki et al.
patent: 4294538 (1981-10-01), Ban
patent: 4402596 (1983-10-01), Kanatani

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