Auto-focusing device storing predetermined calibration informati

Details Auto-focusing device storing predetermined calibration informati Auto-focusing device storing predetermined calibration informati

1988-10-07

1990-07-03

Adams, Russell E.

354403, G03B 300

Patent

active

049395335

ABSTRACT:
An auto-focusing device having a photosensor unit for receiving luminous flux from an object. Lens drive data is predetermined and stored in a storage circuit. The stored lens drive data is selected in accordance with an output from said photosensor unit, and the lens is driven according to the selected data. Each lens drive data stored in the storage circuit is associated with a respective one of a plurality of outputs from the photosensor unit at a time when an object is disposed at a predetermined distance and when luminous flux from the object is actually received by the photosensor unit.

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patent: 4639110 (1987-01-01), Rinn et al.
patent: 4783676 (1988-11-01), Aihara et al.

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