Focus detection with splitter lens

Details Focus detection with splitter lens Focus detection with splitter lens

1982-07-30

1984-11-27

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250204, G01J 120

Patent

active

044853033

ABSTRACT:
A light beam splitter includes a splitter lens a light flux splitter, in which a splitter lens is disposed such that a light beam, having passed through substantially one half of the light emission area of a focusing lens defined by a substantial border line constituted by a straight line passing through the center of the light emission area and dividing the area into two regions, is incident on light receiving elements in one of two light receiving element arrays and a light beam having passed through the other region is incident on light receiving elements in the other light receiving element array individually corresponding to the first-mentioned light receiving elements.

REFERENCES:
patent: 4246476 (1981-01-01), Stauffer
patent: 4373791 (1983-02-01), Araki
patent: 4417139 (1983-11-01), Kusaka
patent: 4450547 (1984-05-01), Nakamura et al.

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