Focus detecting apparatus having variable power condenser lens

Details Focus detecting apparatus having variable power condenser lens Focus detecting apparatus having variable power condenser lens

1992-06-03

1993-04-27

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

354407, G01J 120

Patent

active

052064980

ABSTRACT:
A focus detecting apparatus in which a pair of bundles of rays transmitted through different portions of an exit pupil of a taking lens are transmitted through a common focus detecting zone on a predetermined focal plane of the taking lens and are then converged onto corresponding line sensors through a condenser lens. Separator lenses reform images separated from an image formed on the predetermined focal plane of the taking lens. The focus detecting zone deviates from the optical axis of the taking lens, and the condenser lens has an asymmetrical power distribution.

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