Automatic focusing camera

Details Automatic focusing camera Automatic focusing camera

1992-04-13

1993-06-01

Perkey, W. B.

354403, G03B 1336

Patent

active

052164608

ABSTRACT:
An automatic focusing camera for exposing an image of an object on a film with a function of automatically focusing on the object. The camera includes a range-finding unit to measure the distance between the object and the camera, in which the range-finding unit is capable of measuring the distance with plural measuring areas; a circuit to calculate a moving speed of the object according the measured distance; a circuit to estimate a distance between the object and the camera when the camera exposes the image according to the measured distance by the range-finding unit and the calculated moving speed, before the camera exposes the image; a circuit to determine whether the moving speed exceeds a predetermined speed; and a controller to change the measuring area of the range-finding unit from one measuring area to the other area when the camera determines that the moving speed exceeds the predetermined speed.

REFERENCES:
patent: 4943824 (1990-07-01), Nabeshima et al.
patent: 4959678 (1990-09-01), Nakagawa
patent: 4988856 (1991-01-01), Hamada et al.
patent: 5097282 (1992-03-01), Itoh et al.
patent: 5130735 (1992-07-01), Kusaka et al.
patent: 5136148 (1992-08-01), Nonaka

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