Apparatus for reading image recorded on film

Details Apparatus for reading image recorded on film Apparatus for reading image recorded on film

1988-07-27

1989-04-25

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

353 26A, 250578, G01J 132

Patent

active

048250651

ABSTRACT:
A film image reading apparatus capable of exact image reading including the steps of regulating the quantity of light emitted by a light source before the film is set to the reading position, focusing a lens after the film is set, and determining the threshold value of an image sensor for quantization.

REFERENCES:
patent: 3967110 (1976-06-01), Rogers et al.
patent: 4250488 (1981-02-01), Haupt
patent: 4651226 (1987-03-01), Motoori et al.
patent: 4658301 (1987-04-01), Toyoda et al.

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