Scanning read-out apparatus with scanning speed fluctuation comp

Details Scanning read-out apparatus with scanning speed fluctuation comp Scanning read-out apparatus with scanning speed fluctuation comp

1987-02-17

1988-06-28

Howell, Janice A.

Radiant energy

Invisible radiation responsive nonelectric signalling

Luminescent device

2503272, 358285, G01T 1105

Patent

active

047541431

ABSTRACT:
A scanning read-out apparatus comprises a device for detecting the scanning speed of a light beam and generating a scanning speed signal, and a device for calculation between a read-out signal detected by scanning of a read-out objective and the scanning speed signal and for generating a corrected read-out signal representing the result of the calculation. A coefficient for correction of the read-out signal is adjusted by forcibly fluctuating the scanning speed of the light beam on a read-out objective for correction coefficient adjustment, generating a correction signal by multiplying the scanning speed signal by an arbitrary coefficient, correcting the read-out signal by using the correction signal, extracting a signal of a noise component caused by the forcible fluctuation from the corrected read-out signal, finding the coefficient at which the extracted signal becomes the minimum, and using the coefficient thus found as the correction coefficient.

REFERENCES:
patent: Re30911 (1982-04-01), Burnett
patent: 4032888 (1977-06-01), Broyles et al.
patent: 4258254 (1981-03-01), Kotera et al.
patent: 4346295 (1982-08-01), Tanaka et al.
patent: 4523093 (1985-06-01), Neumann
patent: 4551626 (1985-11-01), Agano
patent: 4591727 (1986-05-01), Gaebelein et al.

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