Focus detection apparatus

Details Focus detection apparatus Focus detection apparatus

1984-09-21

1985-10-29

Adams, Russell E.

354407, G03B 300

Patent

active

045498024

ABSTRACT:
In a focus detecting apparatus for detecting a focusing state of an objective lens in such a manner that light is projected on an object and light reflected by the object is sensed through an objective lens, a lens is disposed between an imaging lens and an objective lens which are used to form an image in accordance with light reflected by the object. The lens between the imaging lens and the objective lens focuses an entrance pupil of the imaging for lens and an exit pupil of the objective lens, thereby effectively guiding the reflected light to a sensor. At the same time, the light-emitting element, the condenser lens, the sensor and the imaging lens are mounted around a penta prism through a plurality of reflectors, so that a camera can be made compact.

REFERENCES:
patent: 4357085 (1982-11-01), Niwa et al.
patent: 4357086 (1982-11-01), Shimomura

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