Focus detecting system

Details Focus detecting system Focus detecting system

1981-10-21

1984-07-10

Adams, Russell E.

354406, 354484, G03B 300, G03B 1318

Patent

active

044590024

ABSTRACT:
A focus detecting system of the invention has a signal processing circuit for processing output signals from photoelectric transducer elements. The signal processing circuit has a circuit for obtaining an absolute value of the output signal and for producing power thereof. This circuit is constructed to operate in a current mode.

REFERENCES:
patent: 3364815 (1968-01-01), Smith et al.
patent: 4083056 (1978-04-01), Nakamura et al.
patent: 4286850 (1981-09-01), Aoki

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