Patent
1994-04-08
1995-05-02
Adams, Russell E.
354428, 354464, G03B 1336
Patent
active
054124484
ABSTRACT:
A camera having a temperature compensating function includes a first IC incorporating a driver for driving a motor for performing focus adjustment of a photographing lens, and a second IC incorporating a distance measuring circuit for measuring a distance to an object to be photographed, and a temperature measuring circuit for measuring the ambient temperature. The first IC generates a larger amount of heat than the second IC because of a driving current supplied to the motor. In the camera, ambient temperature data measured by the temperature measuring circuit immediately after power is supplied to the second IC is stored in a memory, and a CPU performs a correction operation with respect to object distance data output from the distance measuring circuit on the basis of the ambient temperature data stored in the memory, thus obtaining the driving amount of the photographing lens. The motor is controlled through the driver incorporated in the first IC on the basis of the driving amount of the photographing lens calculated by the CPU.
REFERENCES:
patent: 4772912 (1988-02-01), Ishida et al.
patent: 4828383 (1989-05-01), Kunishige et al.
patent: 4866471 (1989-09-01), Ikuta
patent: 5005970 (1991-04-01), Kunishige
patent: 5162836 (1992-11-01), Ishimaru
Adams Russell E.
Olympus Optical Co,. Ltd.
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