Automatic focusing device

Details Automatic focusing device Automatic focusing device

1990-01-18

1992-01-14

Perkey, W. B.

G03B 1336

Patent

active

050814796

ABSTRACT:
This invention relates to an automatic focusing device, particular capable of foreseeing the position of an object after a predetermined future time based on the results of a plurality of past focusing operations, thus enabling the focusing to the object. An automatic focusing device is provided which executes calculations for the abovementioned foreseeing after the execution of a predetermined number of focusing operations. However, if a focused state is identified in a focusing operation in the course of the execution of the predetermined number of focusing operations, the device is adapted to disregard the first-mentioned focusing operation as if it had not been conducted and to exclude the first-mentioned focusing operation from the counting of the predetermined number of focusing operations.

REFERENCES:
patent: 4855776 (1989-08-01), Akashi
patent: 4908645 (1990-03-01), Higashihara et al.
patent: 4924250 (1990-05-01), Hamada et al.
patent: 4967224 (1990-10-01), Hamada et al.
patent: 4972221 (1990-11-01), Ohnuki et al.
patent: 5005037 (1991-04-01), Akashi et al.
patent: 5012267 (1991-04-01), Higashihara

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