Endoscopes incorporating a beam splitter

Details Endoscopes incorporating a beam splitter Endoscopes incorporating a beam splitter

1979-08-02

1981-06-23

Punter, William H.

Optics: measuring and testing

Range or remote distance finding

With photodetection

350 52, 356241, G02B 2732, G02B 2308

Patent

active

042747040

ABSTRACT:
This invention relates to endoscopes of the kind incorporating a beam splitter for direct observation and joint observation by means of a folded optical system substantially larger in diameter than the endoscope or for connection of a film or television camera to the folded optical system.
According to the invention, an opaque plate is mounted to face the folded optical system relative to the optical axis of a first part of said system in a tubular member the opaque plate having a small perforation arranged to pass light, the light spot of which is formed via a lens via the beam splitter via an achromatic lens with the image of the object in a common plane in a field lens and is guided together with the object image via the lens system of the folded optical system to an eye piece of the latter.

REFERENCES:
patent: 2372430 (1945-03-01), Kals
patent: 2595750 (1952-05-01), Back
patent: 3525561 (1970-08-01), Takahashi
patent: 3582178 (1971-06-01), Boughton et al.
patent: 4054387 (1977-10-01), Whittome

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