Focusing detection apparatus

Details Focusing detection apparatus Focusing detection apparatus

1992-09-04

1993-10-26

Perkey, W. B.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

2502018, G03B 1336, G01J 120, G02B 728

Patent

active

052570622

ABSTRACT:
A focusing detection apparatus has at least a focusing detection area on an optical axis of a photographing lens and a focusing detection area off the optical axis of the photographing lens in a photographing field and has a focusing detection optical system including at least a pair of apertures and a pair of refocusing lenses provided one set for each of the focusing detection areas. The focusing detection optical systems are arranged such that a positional relation between centers of the pair of aperture corresponding to the off-axis focusing detection area and optical axes of the pair of refocusing lenses is different from a positional relation between the centers of the pair of apertures corresponding to the on-axis focusing detection area and the optical axes of the pair of refocusing lenses.

REFERENCES:
patent: 4908504 (1990-03-01), Karasaki et al.
patent: 5109154 (1992-04-01), Higashihara et al.
patent: 5160834 (1992-11-01), Moriyama

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