Beam splitter for a single lens reflex camera

Details Beam splitter for a single lens reflex camera Beam splitter for a single lens reflex camera

1984-07-23

1985-12-10

Hix, L. T.

354476, 354479, G03B 700, G03B 1912

Patent

active

045575800

ABSTRACT:
A beam splitter for a single lens reflex camera is provided which divides the light beam from a picture-taking lens into two light beams and directs one light beam to a view-finder system and the other light beam onto a one-dimensional or two-dimensional array sensor. In the beam splitter, metal reflecting films in the form of dots or slits of uniform or non-uniform size are regularly or irregularly arranged on the surface of a transparent substrate. The area ratio of the metal reflecting films is made minimum in the neighborhood of the optical axis of the picture-taking lens, whereby the average transmission factor in the neighborhood of the optical axis is made maximum.

REFERENCES:
patent: 3280714 (1966-10-01), Gunther et al.
patent: 4081807 (1978-03-01), Urano et al.
patent: 4302089 (1981-11-01), Fukuhara
patent: 4461557 (1984-07-01), Kimura

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