Apparatus and method for information from an information carrier

Details Apparatus and method for information from an information carrier Apparatus and method for information from an information carrier

1989-01-19

1991-02-05

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

358471, H01J 4014, H04N 121

Patent

active

049907646

ABSTRACT:
An information read out apparatus for reading information from an information carrier, the apparatus comprising a transparent medium, transportation rollers for transporting the information carrier at a predetermined distance above the transparent medium, a visible light source for radiating light in a first direction toward the information carrier through the transparent medium, the light being reflected through the transparent medium in a second direction, the reflected light corresponding to an analog representation of information on the information carrier, light detecting means responsive to light reflected from the information carrier through the transparent medium for receiving the reflected light, a guide above the transparent medium and spacer disposed between the guide and the transparent medium for maintaining a predetermined minimum distance between the guide and the transparent medium, the distance being regulated to achieve a resolution above a predetermined level with respect to the information read by the light detecting means.

REFERENCES:
patent: 4495409 (1985-01-01), Baji et al.
patent: 4558373 (1985-12-01), Plasencia et al.
patent: 4560866 (1985-12-01), Takenouchi et al.
patent: 4667244 (1987-05-01), Ishikawa
patent: 4677495 (1987-06-01), Ito et al.
patent: 4806775 (1989-02-01), Uchida

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