Optical: systems and elements – Polarization without modulation – By relatively adjustable superimposed or in series polarizers
Patent
1996-01-29
1997-11-18
Dzierzynski, Paul M.
Optical: systems and elements
Polarization without modulation
By relatively adjustable superimposed or in series polarizers
359196, 359211, 359212, 359487, 359495, 359496, G02B 530, G02B 2608
Patent
active
056893680
ABSTRACT:
The present invention allows image recording with plural light beams while eliminating alignment changes of light spots on the inner face of a drum. A light beam output unit 212 combines two circularly polarized light beams having opposite handedness to each other to produce a composite light beam CB. A polarization beam splitter 203 and mirrors 205 and 207 change the course of the light beam towards the inner face of a drum 120. A quarter-wave plate 202 is included, and the polarization beam splitter 203 splits the composite light beam to two separate light beams as a function of the handedness of the circularly polarized light. The optical elements 202, 203, 205, and 207 are integrally rotated around the axis of the drum 120 by a main scanning motor 230, thus scanning a photosensitive material 110 held on the inner face of the drum 120 with the light beams.
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Dainippon Screen Manufacturing Co. Ltd.
Dzierzynski Paul M.
Schuberg Darren E.
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