JPS5793314A - Semiconductor laser optical device - Google Patents

Semiconductor laser optical device

Info

Publication number
JPS5793314A
JPS5793314A JP55169904A JP16990480A JPS5793314A JP S5793314 A JPS5793314 A JP S5793314A JP 55169904 A JP55169904 A JP 55169904A JP 16990480 A JP16990480 A JP 16990480A JP S5793314 A JPS5793314 A JP S5793314A
Authority
JP
Japan
Prior art keywords
light
plate
semiconductor laser
laser beam
reflected light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP55169904A
Other languages
Japanese (ja)
Inventor
Fumitaka Abe
Tadashi Matsuda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP55169904A priority Critical patent/JPS5793314A/en
Publication of JPS5793314A publication Critical patent/JPS5793314A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/10—Scanning systems
    • G02B26/12—Scanning systems using multifaceted mirrors
    • G02B26/124—Details of the optical system between the light source and the polygonal mirror

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Semiconductor Lasers (AREA)
  • Mechanical Optical Scanning Systems (AREA)
  • Facsimile Scanning Arrangements (AREA)

Abstract

PURPOSE:To prevent return of the reflected light of a laser beam to a semiconductor laser light source by using a polarizing plate and 1/4 wavelength plate. CONSTITUTION:A laser beam outputted by a semiconductor laser 1 and having the plane of polarization parallel to a P-N junction face passes through a polarizing plate 6, and is polarized to circularly polarized light by a 1/4 wavelength plate 7 disposed so as to increase a 45 deg. angle to the P-N junction face. A drum 5 is optically scanned by this circularly polarized light via a scanning part 3 and an imaging lens 4. When the reflected light from the drum 5 passes through the plate 7 via a reverse optical path, a 90 deg. change in phase is generated therein and this light is polarized to the linearly polarized light in the direction perpendicular to the P-N junction; therefore, it is shut off by the plate 6. Thereby, the return of the reflected light to the laser 1 is obviated and the fluctuation in the light source output is eliminated. Hence, the stable laser beam scanning is accomplished.
JP55169904A 1980-12-02 1980-12-02 Semiconductor laser optical device Pending JPS5793314A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55169904A JPS5793314A (en) 1980-12-02 1980-12-02 Semiconductor laser optical device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55169904A JPS5793314A (en) 1980-12-02 1980-12-02 Semiconductor laser optical device

Publications (1)

Publication Number Publication Date
JPS5793314A true JPS5793314A (en) 1982-06-10

Family

ID=15895121

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55169904A Pending JPS5793314A (en) 1980-12-02 1980-12-02 Semiconductor laser optical device

Country Status (1)

Country Link
JP (1) JPS5793314A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5961984A (en) * 1982-09-30 1984-04-09 Sharp Corp Semiconductor laser device
JPS63109916U (en) * 1987-01-08 1988-07-15
WO1993006687A1 (en) * 1991-09-26 1993-04-01 Seiko Epson Corporation Image reader
USRE34556E (en) * 1985-01-23 1994-03-01 Smith & Nephew Dyonics Inc. Surgical system for powered instruments
US5749885A (en) * 1995-10-02 1998-05-12 Smith & Nephew, Inc. Surgical instrument with embedded coding element

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5961984A (en) * 1982-09-30 1984-04-09 Sharp Corp Semiconductor laser device
USRE34556E (en) * 1985-01-23 1994-03-01 Smith & Nephew Dyonics Inc. Surgical system for powered instruments
JPS63109916U (en) * 1987-01-08 1988-07-15
WO1993006687A1 (en) * 1991-09-26 1993-04-01 Seiko Epson Corporation Image reader
US5596360A (en) * 1991-09-26 1997-01-21 Seiko Epson Corporation Image reading apparatus with a half mirror
US5749885A (en) * 1995-10-02 1998-05-12 Smith & Nephew, Inc. Surgical instrument with embedded coding element

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