High-speed, high-resolution optical scanner system

Details High-speed, high-resolution optical scanner system High-speed, high-resolution optical scanner system

1995-06-07

1998-05-12

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250214RC, H01J 4014

Patent

active

057509808

ABSTRACT:
A high-speed, high-resolution optical scanner system includes a flying spot scanner for scanning a beam across an object bearing information to be read and a high-bandwidth, high-sensitivity optical receiver including an avalanche photodiode for sensing the variation in light intensity of the beam reflected from the object being scanned; a power source for biasing the avalanche diode proximate its reverse breakdown voltage to produce high current gain in response to incident light; and a charge collector circuit responsive to the avalanche photodiode for producing a voltage proportional to the light incident on the avalanche photodiode.

REFERENCES:
patent: 4019048 (1977-04-01), Maione et al.
patent: 4626676 (1986-12-01), Gerardin

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