Light beam deflecting apparatus, image forming apparatus...

Details Light beam deflecting apparatus, image forming apparatus... Light beam deflecting apparatus, image forming apparatus...

2005-08-30

2005-08-30

Cherry, Euncha P. (Department: 2872)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

C359S202100, C359S212100

Reexamination Certificate

active

06937372

ABSTRACT:
0 A light beam deflecting apparatus which measures the passing time of a light beam in reciprocating scans on a specified position on the scanning line, and then calculates time lag data corresponding to the time lag in the reciprocating scan of a light beam deflecting device with respect to the drive signal therefor. From a measurement of two passing times in forward and backward scans, timing data is calculated, corresponding to the modulation start or end time of the light beam within a scanning cycle period. The invention resolves the drawback, in a light beam deflecting device for displaying an image by reciprocating light beam scannings, of image variation by variations for example in amplitude, phase and offset.

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