Distance measuring finder

Details Distance measuring finder Distance measuring finder

1979-05-04

1981-03-24

Anderson, Bruce C.

Optics: measuring and testing

Range or remote distance finding

With view finder

356 4, G01C 304

Patent

active

042577047

ABSTRACT:
A finder provided with a distance measuring device for measuring a distance to an object being photographed by projecting infrared light from a light emitting means through a projection optical system onto the object and by receiving the reflected light from the object through a light collecting optical system at photosensitive means. Positioned in a space between the projection optical system and the light collecting optical system is an objective lens of a mark finder. Light transmitted through said objective lens is directed through a half mirror to an eyepiece; a field framing plate and a reflection mirror are provided with respective openings at the center thereof and arranged so that either one of the light paths of the above described projection optical system and light collecting optical system passes through the openings, and light entering through the frame marks of the field framing plate is directed to the eyepiece after successive reflection from the reflection mirror and the half mirror.

REFERENCES:
patent: 3089380 (1963-05-01), Baur et al.
patent: 3653762 (1972-04-01), Harvey
patent: 3963347 (1976-06-01), Segre et al.

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