JPS60166916A - 光走査装置 - Google Patents

光走査装置

Info

Publication number
JPS60166916A
JPS60166916A JP59021812A JP2181284A JPS60166916A JP S60166916 A JPS60166916 A JP S60166916A JP 59021812 A JP59021812 A JP 59021812A JP 2181284 A JP2181284 A JP 2181284A JP S60166916 A JPS60166916 A JP S60166916A
Authority
JP
Japan
Prior art keywords
light
light sources
polarization
photodetector
polarized 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
JP59021812A
Other languages
English (en)
Inventor
Akira Arimoto
昭 有本
Susumu Saito
進 斉藤
Kimio Tateno
立野　公男
Keiji Kataoka
慶二 片岡
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.)
Koki Holdings Co Ltd
Hitachi Ltd
Original Assignee
Hitachi Ltd
Hitachi Koki Co 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 Hitachi Ltd, Hitachi Koki Co Ltd filed Critical Hitachi Ltd
Priority to JP59021812A priority Critical patent/JPS60166916A/ja
Priority to US06/680,497 priority patent/US4644160A/en
Priority to DE3445751A priority patent/DE3445751C3/de
Publication of JPS60166916A publication Critical patent/JPS60166916A/ja
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/16—Beam splitting or combining systems used as aids for focusing
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/14—Beam splitting or combining systems operating by reflection only
    • G02B27/144—Beam splitting or combining systems operating by reflection only using partially transparent surfaces without spectral selectivity
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/14—Beam splitting or combining systems operating by reflection only
    • G02B27/145—Beam splitting or combining systems operating by reflection only having sequential partially reflecting surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/28—Systems for automatic generation of focusing signals
    • G02B7/30—Systems for automatic generation of focusing signals using parallactic triangle with a base line
    • G02B7/32—Systems for automatic generation of focusing signals using parallactic triangle with a base line using active means, e.g. light emitter
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K15/00—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers
    • G06K15/02—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers
    • G06K15/12—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers
    • G06K15/1204—Arrangements for producing a permanent visual presentation of the output data, e.g. computer output printers using printers by photographic printing, e.g. by laser printers involving the fast moving of an optical beam in the main scanning direction
    • G06K15/1219—Detection, control or error compensation of scanning velocity or position, e.g. synchronisation
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • G11B7/08547—Arrangements for positioning the light beam only without moving the head, e.g. using static electro-optical elements
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0946—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following specially adapted for operation during external perturbations not related to the carrier or servo beam, e.g. vibration
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/14—Heads, e.g. forming of the optical beam spot or modulation of the optical beam specially adapted to record on, or to reproduce from, more than one track simultaneously
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/047—Detection, control or error compensation of scanning velocity or position
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/19—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Electromagnetism (AREA)
  • Multimedia (AREA)
  • Plasma & Fusion (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Mechanical Optical Scanning Systems (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Fax Reproducing Arrangements (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明は光走査装置、特に複数ケの光源を用いた光走査
装置に関する。
〔発明の背景〕
光を走査するレーザプリンタあるいはレーザーファクシ
ミリ等の装置においては、回転多面鏡やガルバーミラー
を高速に動かして光走査を行なっている。高速、高分解
能化するに従って、その動作スピードを著しく高める必
要があるが、それには限度がある。
これに対処する方法としては、複数光源を用いて同時走
査させることにより、回転多面鏡の光偏向器の動作速度
を低減させることが行なわれている。
複数個の光源としては、■半導体レーザアレイ及びＬＥ
Ｄプレイを用いる。■単体の光源を複数個用いるの二つ
がめる。
複数の光源を用いる時には、その各々の位置関係を正確
にとっておかないと、２つの光スポットが重なったシ、
離れたシして走査結果が不良になる。
〔発明の目的〕
本発明は、上述の如き欠点を除去するためになされたも
のであシ、複数光源を用いても良好な走査結果を得るこ
とのできる光走査装置を提供することを目的とする。
〔発明の概要〕
本発明は、かかる目的を達成するため、複数の光源の間
隔を調整する手段を設けたことを特徴とする。
〔発明の実施例〕
以下、実施例によって本発明の詳細な説明する。
第１図は本発明の一実施例を示す図でおる。
本実施例では２つの直線偏光をした光源１１゜１２を用
い、且つ各々の偏光方向を直交配置（Ｐ。
Ｓ偏光）する。２は偏向ビーム、スプリッタであり、Ｐ
偏光光を通し、Ｓ偏光光を直角反射させるようにする。
各光源からのビームは、偏光ビームスプリッタ２を通っ
た後、同一方向に照射され、光偏向器６によって複数光
同時走査されることができる。而し、走査面上における
光スポツト径と光スポツト間隔を適当な関係にする必要
がある。
３は４分割の光検出器で、第２図に示すごとく、４つの
受光部４□＋４！＊４３＊４４からなシ、例えば、受光
部４１＋４１にＰ偏光の光スポット、受光部４．．４４
にＳ偏光の光スポットが入るよう配置し、偏光ビームス
プリッタを通った後の光の一部の光を、光検出器３に向
ける。
受光部４１　＊　４．　、及び４．．４４の差動出力が
０になるように、光源ｉ、、ｉ、あるいは結合レンズ５
８，５□にサーボをかけてやれば、各々の光スポットの
位置関係は、走査面上においても保たれることになる。
受光部４１，４．．４．．４４の間隔ｄを任意にとるこ
とによシ、光スポットの間隔を任意距離に設定すること
ができる。
第３図は本発明の他の実施例を示す図であシ、光検出器
の他の構造例を示すものである。
４つの受光部２０□、２０；　、２０ｇ　、２０４から
なる光検出器で一つの光スポットの位置を検出制御し、
他の４つの受光部２０．〜２０．で他方の光の位置を検
出、制御する。各受光部の出力をそれぞれＤ（２０１）
、Ｄ（２０２）、Ｄ（２０ｇ）〜Ｄ（２０ｉとすれば、 Ｄ（２０□）＋Ｄ　（２０ｇ　）　（Ｄ　（□２０２　
）＋Ｄ（ｚｏａ））及びＤ　Ｃ２０ａ　）＋Ｄ　（２０
？　）−（Ｄ　（２０ａ　＋Ｄ　（２０ｇ　）　）で、
走査間隔を制御し、 Ｄ（２０１）＋Ｄ（２０２）　（Ｄ（２０ａ　）＋Ｄ（
２０４）　）及びＤ（２０ｓ　）十Ｄ（２０６）−（Ｄ
（２０７）＋Ｄ（２０８）　）で、走査方向の２つの光
スポットの間隔を制御する。そのためには、５Ｉ、５２
のレンズあるいはｉｔ　、１２の光源に２次元で動く制
御アクチュエータを設ければよい。
〔発明の効果〕
以上の如く、本発明では、複数光源の間隔調整手段を設
けたので、複数の光源を用いても、良好な走査結果が得
られる。しかも本発明では、光源の間隔を電気的に自動
調整するので、各光源の配置に高精度が必要でなく、複
数光源を用いた光走査装置の実現に大きな効果を期待で
きる。
【図面の簡単な説明】
第１図は本発明の一実施例を示す図、泳２図はその光検
出器の構成を示す図、第３図は本発明の他の実施例を示
し、光検出器の他側を示す図である。 １、．１２・・・光源、２・・・偏光ビームスプリッタ
、３・・・光検出器、’１＊’１１＋４．１＋４４・・
・受光部、５□、５．・・・カップリングレンズ、６・
・・光偏向器、７・・・走査用レンズ、８・・・ハーフ
ミラ−１９・・・レン第１図 づ 第２図　嘉３図

Claims (1)

    【特許請求の範囲】
  1. １、複数ケの光源を用いて、光を走査する光走査装置に
    おいて、上記複数ケの光源の間隔を任意に変更しうる手
    段を有することを特徴とする光走査装置。
JP59021812A 1983-12-14 1984-02-10 光走査装置 Pending JPS60166916A (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP59021812A JPS60166916A (ja) 1984-02-10 1984-02-10 光走査装置
US06/680,497 US4644160A (en) 1983-12-14 1984-12-11 System for holding plural light beams in predetermined relative positions
DE3445751A DE3445751C3 (de) 1983-12-14 1984-12-14 Einrichtung zum Halten mehrerer Lichtstrahlen bezüglich einer vorgegebenen optischen Bezugsachse

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59021812A JPS60166916A (ja) 1984-02-10 1984-02-10 光走査装置

Publications (1)

Publication Number Publication Date
JPS60166916A true JPS60166916A (ja) 1985-08-30

Family

ID=12065468

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59021812A Pending JPS60166916A (ja) 1983-12-14 1984-02-10 光走査装置

Country Status (1)

Country Link
JP (1) JPS60166916A (ja)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0220652A2 (en) * 1985-10-22 1987-05-06 Kuraray Co., Ltd. Method for manufacturing phase gratings of a combination pattern-refraction modification type
JPS62262816A (ja) * 1986-05-09 1987-11-14 Ricoh Co Ltd ２ビ−ム検出方法
JPS63124664A (ja) * 1986-11-13 1988-05-28 Fuji Xerox Co Ltd マルチビ−ムレ−ザプリンタ
JPH01237684A (ja) * 1988-03-18 1989-09-22 Hitachi Koki Co Ltd 電子写真装置の帯電制御方法
US5006705A (en) * 1988-08-12 1991-04-09 Hitachi, Ltd. Light beam scanning apparatus with controller for varying spacing between a plurality of scanning beams
US6236040B1 (en) 1997-03-17 2001-05-22 Fujitsu Limited Image forming apparatus

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5267650A (en) * 1975-12-03 1977-06-04 Matsushita Electric Ind Co Ltd Optical deflection control system
JPS54134456A (en) * 1978-04-11 1979-10-18 Canon Inc Semiconductor laser light source
JPS55142307A (en) * 1979-04-24 1980-11-06 Matsushita Electric Ind Co Ltd Optical axis position correcting device
JPS5868016A (ja) * 1981-10-20 1983-04-22 Canon Inc 走査線ピツチを変更できる走査光学系
JPS5915218A (ja) * 1982-07-16 1984-01-26 Minolta Camera Co Ltd 光ビ−ム走査装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5267650A (en) * 1975-12-03 1977-06-04 Matsushita Electric Ind Co Ltd Optical deflection control system
JPS54134456A (en) * 1978-04-11 1979-10-18 Canon Inc Semiconductor laser light source
JPS55142307A (en) * 1979-04-24 1980-11-06 Matsushita Electric Ind Co Ltd Optical axis position correcting device
JPS5868016A (ja) * 1981-10-20 1983-04-22 Canon Inc 走査線ピツチを変更できる走査光学系
JPS5915218A (ja) * 1982-07-16 1984-01-26 Minolta Camera Co Ltd 光ビ−ム走査装置

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0220652A2 (en) * 1985-10-22 1987-05-06 Kuraray Co., Ltd. Method for manufacturing phase gratings of a combination pattern-refraction modification type
JPS62262816A (ja) * 1986-05-09 1987-11-14 Ricoh Co Ltd ２ビ−ム検出方法
JPS63124664A (ja) * 1986-11-13 1988-05-28 Fuji Xerox Co Ltd マルチビ−ムレ−ザプリンタ
JPH01237684A (ja) * 1988-03-18 1989-09-22 Hitachi Koki Co Ltd 電子写真装置の帯電制御方法
US5006705A (en) * 1988-08-12 1991-04-09 Hitachi, Ltd. Light beam scanning apparatus with controller for varying spacing between a plurality of scanning beams
US6236040B1 (en) 1997-03-17 2001-05-22 Fujitsu Limited Image forming apparatus

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