Image pickup apparatus for focusing an object image based on mir

Details Image pickup apparatus for focusing an object image based on mir Image pickup apparatus for focusing an object image based on mir

1993-05-06

1995-05-16

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Picture signal generator

358471, 358486, 358493, 250560, 2502017, H04N 140

Patent

active

054166098

ABSTRACT:
An image pickup apparatus for reading an object having a curved document surface such as an opened book, constructed to focus an optical system all the object. A line sensor is moved for scanning the object, thereby a distance between the line sensor and the object is measured, and the object is imaged while controlling an optical system based on data of measured distance so that an object image is in focus on the line sensor. This allows all over the object surface to be in focus, whereby the clear image without blur is obtainable.

REFERENCES:
patent: 4768052 (1988-08-01), Hamada et al.
patent: 5084611 (1992-06-01), Okisu et al.
patent: 5184733 (1993-02-01), Arnarson et al.
patent: 5220436 (1993-06-01), Aosaki et al.
patent: 5221974 (1993-06-01), Kusumoto et al.
patent: 5276530 (1994-01-01), Siegel

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