Automatic focusing device equipped with close-up range focal con

Details Automatic focusing device equipped with close-up range focal con Automatic focusing device equipped with close-up range focal con

1985-10-04

1987-04-28

Perkey, W. B.

G03B 300

Patent

active

046609547

ABSTRACT:
A system for focusing the subject which is beyond the close-up range limit of a camera lens including a distance detector detecting the distance between the lens and the subject, a focusing device for setting the lens at a focal point based upon the signal from the distance detector, an optical correction device for providing an auxiliary lens between the lens and correcting the light path of the light entering through the lens, and a distance remeasuring device for remeasuring the distance between the subject and the lens to shift the lens at the focal point.

REFERENCES:
patent: 4505566 (1985-03-01), Noguchi
patent: 4540264 (1985-09-01), Daitoku et al.
patent: 4582411 (1986-04-01), Ohmura et al.

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