Light measuring apparatus and camera using the light measuring a

Details Light measuring apparatus and camera using the light measuring a Light measuring apparatus and camera using the light measuring a

1998-12-23

2000-02-22

Perkey, W. B.

Photography

With object illumination for exposure

Activated under low light condition

396206, 356218, 250214P, G03B 1503, G01J 100

Patent

active

060290145

ABSTRACT:
A light measuring apparatus comprises an oscillation circuit, a first delaying circuit for delaying an output waveform of the oscillation circuit in accordance with a peripheral brightness, a second delaying circuit for delaying an output waveform of the oscillation circuit for a predetermined period of time, and a brightness judging circuit for judging a peripheral brightness in accordance with outputs of the first and second delaying circuits.

REFERENCES:
patent: 4460264 (1984-07-01), Winter

Affiliated with

Also associated with

Rating

Light measuring apparatus and camera using the light measuring a does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Light measuring apparatus and camera using the light measuring a, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light measuring apparatus and camera using the light measuring a will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-527882