Method and device for controlling the exposure of a camera when

Details Method and device for controlling the exposure of a camera when Method and device for controlling the exposure of a camera when

1978-05-04

1980-07-29

Hix, L. T.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356222, G03B 708

Patent

active

042148260

ABSTRACT:
A method of controlling the exposure of a camera comprising steps of measuring the luminance of an object on each surface section thereof by a plurality of photoelectric elements widely arranged on the image forming plane of the camera and where the light from the object to be photographed is received, of gaining the maximum and the minimum values of the outputs provided by any one of the photoelectric elements and detecting whether the difference between the maximum and the minimum values exceeds a predetermined value, and of converting the mode for determining the exposure by the detecting signal.
The exposure is determined on the basis of a luminance level equal to the maximum value when the difference between the maximum and the minimum values of the outputs provided by any one of the photoelectric elements exceeds the predetermined value and the number of the photoelectric elements providing outputs near the maximum value is small, while on the basis of a luminance level equal to the minimum value when the difference between the maximum and the minimum values of the outputs provided by any one of the photoelectric elements exceeds the predetermined value and the number of the photoelectric elements providing outputs near the minimum value is small.

REFERENCES:
patent: 3717077 (1973-02-01), Harvey
patent: 3741088 (1977-06-01), Nobusawa
patent: 3772517 (1973-11-01), Smith
patent: 3945732 (1976-03-01), Nobusawa
patent: 3971046 (1976-07-01), Nobusawa
patent: 3994595 (1976-11-01), Nobusawa

Affiliated with

Also associated with

Rating

Method and device for controlling the exposure of a camera when does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and device for controlling the exposure of a camera when , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and device for controlling the exposure of a camera when will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-902328