Automatic focusing apparatus

Details Automatic focusing apparatus Automatic focusing apparatus

1991-03-07

1992-09-15

Adams, Russell E.

354402, G03B 1336

Patent

active

051482100

ABSTRACT:
An automatic focusing device for driving an optical system to focus on a subject. The device has a CCD to read an image of the subject, a driver for the CCD so that a first image signal is outputted from the CCD in a normal direction and a second image signal is outputted from the CCD in a reversal direction, the optical system to form the image on the CCD, and a controller to control the optical system in accordance with the first image signal and the second image signal so that the optical system forms the image on the CCD in focus.

REFERENCES:
patent: 4384199 (1983-05-01), Ogino et al.
patent: 4490037 (1984-12-01), Topoulos et al.

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