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Patent Searching and Data


Title:
LIGHT BEAM SCANNER
Document Type and Number:
Japanese Patent JPH06250107
Kind Code:
A
Abstract:

PURPOSE: To provide a light beam scanner which stabilizes scanning beams without fetching external disturbance and to greatly improve picture quality.

CONSTITUTION: A hologram scanner is provided with a laser diode which emits a divergence light, a semiconductor laser 10 which has a photodiode monitoring the optical output, a collimator lens 11 which converts the divergence light from the laser diode to parallel light, a preset prehologram 20 and a hologram disk 30 which deflection scans the parallel rays of light that are made incident through the preset hologram 20. The arrangement relationship between the prehologram 20 and the collimator lens 11 is deviated from the Bragg condition so that the reflected light from the hologram disk 30 does not return to the laser diode and the photodiode.


Inventors:
TAMURA HISAHIRO
IWAMATSU TADASHI
Application Number:
JP1993000039046
Publication Date:
September 09, 1994
Filing Date:
February 26, 1993
Export Citation:
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Assignee:
SHARP KK
International Classes:
G02B26/10; (IPC1-7): G02B26/10
Attorney, Agent or Firm:
山本 秀策