Photography – With exposure objective focusing means – focusing aid – or... – Lens drive circuit or motor structure
Patent
1995-06-06
1997-06-17
Perkey, W. B.
Photography
With exposure objective focusing means, focusing aid, or...
Lens drive circuit or motor structure
396134, G03B 1336
Patent
active
056402252
ABSTRACT:
A focus detecting apparatus including an optical system having a group of focusing lenses, an object distance measuring device which measures the amount of defocus for a specific object imaged by the focusing optical system, a focus judging device which judges the focus state in accordance with the measurement of the object distance measuring device and a lens driver for driving the focusing lens group to a focal position, in accordance with the amount of defocus, wherein the apparatus includes a controller for repeatedly operating the object distance measuring device and the lens driver, and a moving object judging device for judging that the specific object is a moving object when the focus judging device judges the out-of-focus state more than one time during the repeated operations.
REFERENCES:
patent: 4537487 (1985-08-01), Tanaguchi et al.
patent: 4550995 (1985-11-01), Toyama
patent: 4783677 (1988-11-01), Hamada et al.
patent: 4800410 (1989-01-01), Akashi et al.
patent: 4816856 (1989-03-01), Hamada et al.
patent: 4860045 (1989-08-01), Hamada et al.
patent: 4868592 (1989-09-01), Suzuki et al.
patent: 4908647 (1990-03-01), Ueyama
patent: 4924250 (1990-05-01), Hamada et al.
patent: 4952962 (1990-08-01), Suzuki et al.
patent: 4967224 (1990-10-01), Hamada et al.
patent: 4969006 (1990-11-01), Ishibashi et al.
patent: 4980715 (1990-12-01), Utagawa
patent: 4988856 (1991-01-01), Hamada et al.
patent: 5000605 (1991-03-01), Ohara et al.
patent: 5005039 (1991-04-01), Hamada et al.
patent: 5008605 (1991-04-01), Ohara et al.
patent: 5012267 (1991-04-01), Higashihara
patent: 5036349 (1991-07-01), Suzuki et al.
patent: 5040015 (1991-08-01), Hamada et al.
patent: 5065175 (1991-11-01), Suzuki et al.
patent: 5066968 (1991-11-01), Suzuki et al.
patent: 5157434 (1992-10-01), Suzuki et al.
patent: 5276476 (1994-01-01), Uenaka
patent: 5291235 (1994-03-01), Uenaka
patent: 5321459 (1994-06-01), Uenaka
patent: 5359382 (1994-10-01), Uenaka
patent: 5416559 (1995-05-01), Uenaka
patent: 5448329 (1995-09-01), Nakata
English Language Abstract of Japanese Publication No. 60-214325.
Search Report--United Kingdom Application 9210487.6.
Patent Abstract of Japan vol. 10, No. 371 (P-526) Dec. 11, 1986 and JP-A-61 165 716.
Patent Abstract of Japan vol. 16, No. 124 (E-1183) Mar. 3, 1992 and JP-A-03 289 775.
Preliminary Search Report--French Appliaction 92 12522.
Patent Abstract of Japan vol. 7, No. 146 (P-206) Jun. 25, 1983 and JP-A-58 059 416.
Search Report--United Kingdom Application 9505187.6.
Search Report--United Kingdom Application 9505186.8.
Search Report--United Kingdom Application 9505185.0.
Search Report--French Application 92 12521.
Search Report--French Application 92 05919.
Asahi Kogaku Kogyo Kabushiki Kaisha
Perkey W. B.
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