Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1992-08-25
1993-06-22
Buczinski, Stephen C.
Optics: measuring and testing
Range or remote distance finding
With photodetection
354403, 356 4, G01C 300, G01C 500, G03B 300
Patent
active
052219550
ABSTRACT:
In an AFIC, an integration output 1/D.sub.S of the ratio calculation and light amount integrating output i.sub.SS /A.sub.S which are respectively dependent on the ratio and sum of signal currents derived from the electrodes of a pair of PSDs when a spot light emitting section of an IRED is activated are derived. Further, an integration output 1/D.sub.M of the ratio calculation and light amount integrating integrating output i.sub.SM /A.sub.M which are respectively dependent on the ratio and sum of signal currents derived from the electrodes of the pair of PSDs when the spot and area light emitting sections of the IRED are activated are derived. Then, an arithmetic device derives a distance to a subject based on the four outputs. Alternatively, the arithmetic device compares the integration outputs of the ratio calculation and determines the distance to the subject by selectively effecting the distance deriving calculation based on the integration output of the ratio calculation when the spot light emitting section is activated, the distance deriving calculation based on the integration output of the ratio calculation when the spot and area light emitting section are activated, and the distance deriving calculation based on the above four outputs according to the result of comparison.
REFERENCES:
patent: 4582424 (1986-04-01), Kawabata
patent: 4648710 (1987-03-01), Ban et al.
patent: 4688919 (1987-08-01), Ogawa et al.
patent: 4764786 (1988-08-01), Tamura et al.
patent: 4814810 (1989-03-01), Ishiguro
Buczinski Stephen C.
Olympus Optical Co,. Ltd.
LandOfFree
Distance measuring apparatus for camera does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Distance measuring apparatus for camera, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Distance measuring apparatus for camera will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1443961