Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1990-10-02
1992-09-15
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
354403, 356 1, G03B 300, G01C 300
Patent
active
051480115
ABSTRACT:
In a distance measuring apparatus of the type which measures the distance to an object by projecting a distance measurement light to the object, receiving the reflection of the light thus projected, and integrating a light reception signal corresponding to the reflection thus received, the following devices are provided: an integration device for performing the above integration; a judging device for making a judgment as to whether accuracy in distance measurement can be provided on the basis of the integration output from the integration device for a predetermined time; and a distance information forming device for forming distance information, when the above-mentioned judging device concludes that accuracy in distance measurement cannot be provided, on the basis of the intergration output from the integration device for the predetermined time.
REFERENCES:
patent: 4723073 (1988-02-01), Amikura et al.
patent: 4755662 (1988-07-01), Fujiwra et al.
patent: 4855585 (1989-08-01), Nonaka
patent: 4967223 (1990-10-01), Suzuki
patent: 4977457 (1990-12-01), Tamekuni et al.
Canon Kabushiki Kaisha
Messinger Michael
Nelms David C.
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