Automatic focusing device used in combination with auxiliary lig

Details Automatic focusing device used in combination with auxiliary lig Automatic focusing device used in combination with auxiliary lig

1984-01-24

1985-06-04

Adams, Russell E.

354415, 35412713, G03B 300, G03B 700

Patent

active

045210934

ABSTRACT:
In a passive type automatic focusing device which cannot detect an in-focus state for a dark object, an auxiliary light source is used. When preparation of light emission of the auxiliary light source is completed, a photo-taking lens driver of the automatic focusing device for the photo-taking lens is activated to drive the photo-taking lens to the in-focus position.

REFERENCES:
patent: 4095241 (1978-06-01), Matsumoto
patent: 4394077 (1983-07-01), Yoshino et al.
patent: 4459005 (1984-07-01), Harvey

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