Parallel beam to beam power correction

Details Parallel beam to beam power correction Parallel beam to beam power correction

2006-10-10

2006-10-10

Tran, Huan (Department: 2861)

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

C347S133000

Reexamination Certificate

active

07119825

ABSTRACT:
An electro-optical system for adjusting beam to beam power non-uniformity in a multi-beam scanning system is disclosed. The electro-optical system consists of N×M array of light beams and N×M array of photodetectors wherein optical means deflect the light beams onto a photodetector array. A circuit consisting of N×M array of programmable laser drivers programmed with uniformity values for each light beam and having an N×M array of feedback loops is used to adjust the power intensity of each beam through the programmable laser drivers wherein each programmable laser driver uses the photodetector array summed with non-linearity inputs to adjust for beam to beam power uniformity correction.

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