JPS6472117A - Optical scanning device - Google Patents

Optical scanning device

Info

Publication number
JPS6472117A
JPS6472117A JP62228327A JP22832787A JPS6472117A JP S6472117 A JPS6472117 A JP S6472117A JP 62228327 A JP62228327 A JP 62228327A JP 22832787 A JP22832787 A JP 22832787A JP S6472117 A JPS6472117 A JP S6472117A
Authority
JP
Japan
Prior art keywords
light beam
deflecting means
spot
optical system
generating means
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
JP62228327A
Other languages
Japanese (ja)
Inventor
Takaki Hisada
Yoshio Ariki
Shunichi Taguchi
Takesuke Maruyama
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 filed Critical Hitachi Ltd
Priority to JP62228327A priority Critical patent/JPS6472117A/en
Publication of JPS6472117A publication Critical patent/JPS6472117A/en
Pending legal-status Critical Current

Links

Landscapes

  • Mechanical Optical Scanning Systems (AREA)
  • Lenses (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Fax Reproducing Arrangements (AREA)

Abstract

PURPOSE:To compensate the curvature of field and distortion even when the angle of deflection is increased by forming a spot which is laterally long in a scanning direction on the reflecting surface of a deflecting means with a light beam generated by a light beam generating means through a 2nd optical system, and limiting the beam diameter of the light beam through an opening shield. CONSTITUTION:A 2nd optical system 2 is arranged between the light beam generating means 1 and deflecting means 6 and the light beam is converged in a subscanning direction by the 2nd optical system to form the spot which is laterally long in the main scanning direction on the reflecting surface of the deflecting means 6. Further, the opening shield plate 3 arranged between the light beam generating means 1 and deflecting means 6 limits the light beam mainly in the subscanning direction and its limitation width is varied to adjust the beam spot of the light beam on a surface to be scanned. Consequently, even when the angle of deflection is large, the curvature of field and distortion are compensated sufficiently although the extremely simple constitution of a spherical single lens and a toric reflecting mirror is employed.
JP62228327A 1987-09-14 1987-09-14 Optical scanning device Pending JPS6472117A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62228327A JPS6472117A (en) 1987-09-14 1987-09-14 Optical scanning device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62228327A JPS6472117A (en) 1987-09-14 1987-09-14 Optical scanning device

Publications (1)

Publication Number Publication Date
JPS6472117A true JPS6472117A (en) 1989-03-17

Family

ID=16874714

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62228327A Pending JPS6472117A (en) 1987-09-14 1987-09-14 Optical scanning device

Country Status (1)

Country Link
JP (1) JPS6472117A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0580263A (en) * 1990-10-11 1993-04-02 Internatl Business Mach Corp <Ibm> Exposure device
CN107270825A (en) * 2017-05-11 2017-10-20 上海岩土工程勘察设计研究院有限公司 A kind of great circle shield tunnel diameter calculation method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0580263A (en) * 1990-10-11 1993-04-02 Internatl Business Mach Corp <Ibm> Exposure device
CN107270825A (en) * 2017-05-11 2017-10-20 上海岩土工程勘察设计研究院有限公司 A kind of great circle shield tunnel diameter calculation method
CN107270825B (en) * 2017-05-11 2019-08-23 上海勘察设计研究院(集团)有限公司 A kind of great circle shield tunnel diameter calculation method

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