Inspection/adjustment method and apparatus for laser beam output

Details Inspection/adjustment method and apparatus for laser beam output Inspection/adjustment method and apparatus for laser beam output

1993-06-30

1995-07-25

Reinhart, Mark J.

Recorders

Light or beam recording

Including record receiver or handling means therefor

372 31, B41J 2435

Patent

active

054366453

ABSTRACT:
There is disclosed a laser beam output optical unit adjustment method and apparatus, which can perform inspection and adjustment of a laser beam unit and a laser scanning optical system including this unit used in a laser beam printer within a short period of time. The laser irradiation position is roughly adjusted using a wide-field position detector, and focus rough adjustment is then performed using a narrow-field position detector. Thereafter, fine adjustment of the irradiation position and focus fine adjustment are performed using the narrow-field position detector. An image enhancement tube capable of a high-speed gate operation is arranged in a laser scanning region, and instantaneously takes a beam spot during laser scanning. An image processing devices analyzes the taken spot image, and a calculation unit calculates various data.

REFERENCES:
patent: 4624563 (1986-11-01), Johnson
patent: 4786154 (1988-11-01), Fantone et al.

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