Light beam scanning apparatus

Details Light beam scanning apparatus Light beam scanning apparatus

1978-10-17

1980-07-22

Nelms, David

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250235, G01J 120

Patent

active

042141540

ABSTRACT:
A light beam scanning apparatus for scanning with a light beam from a light beam generating unit such as a laser is provided with at least a light beam detector on a scanning line of the light beam to detect the arrival of the light beam maintained in scanning motion by a scanner. The output of the detector energizes a first control to control the scanner thereby maintaining the maximum angle of rotation thereof at an approximately constant value. A beam detect signal released from the first control is utilized for determining the start position of information recording.

REFERENCES:
patent: 4002830 (1977-01-01), Brown et al.

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