JPS649412A - Scanning/image forming optical system - Google Patents

Scanning/image forming optical system

Info

Publication number
JPS649412A
JPS649412A JP62164705A JP16470587A JPS649412A JP S649412 A JPS649412 A JP S649412A JP 62164705 A JP62164705 A JP 62164705A JP 16470587 A JP16470587 A JP 16470587A JP S649412 A JPS649412 A JP S649412A
Authority
JP
Japan
Prior art keywords
optical system
lens group
face
main scanning
scanning direction
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.)
Granted
Application number
JP62164705A
Other languages
Japanese (ja)
Other versions
JP2626708B2 (en
Inventor
Hiromitsu Yamakawa
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.)
Fujinon Corp
Original Assignee
Fuji Photo Optical 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 Fuji Photo Optical Co Ltd filed Critical Fuji Photo Optical Co Ltd
Priority to JP62164705A priority Critical patent/JP2626708B2/en
Publication of JPS649412A publication Critical patent/JPS649412A/en
Application granted granted Critical
Publication of JP2626708B2 publication Critical patent/JP2626708B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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

Abstract

PURPOSE:To reduce the cost of the titled optical system by constituting the optical system of a lens group having negative refractive force at a section in a main scanning direction, a recessed cylindrical mirror and a lens group having positive refractive force at a section in the main scanning direction. CONSTITUTION:Optical beams radiated from a laser light source S are concentrated into a deflecting reflection face 4 of a rotary polygon mirror 3 or its vicinity by a cylindrical lens 2 through an optical system 1. The linear image is reflected and deflected by the reflection face 4, refractive and diffused by the 1st lens group 5 having negative refractive force as a whole at the section in the main scanning direction, reflected upward by the cylindrical mirror 6 having a bus parallel with the main scanning direction A on an optical path, refracted and transmitted by the 2nd lens group 7, and then concentrated into a scanning face 8. The beams are mainly scanned in the direction A on the scanning face 8 by the rotation in the direction C of the mirror 3. Since respective faces constituting the scanning/image forming optical system consist of only spherical faces to be rotationally symmetrical faces about the optical axis and cylinder faces and arranged on positions separated from an image forming face, the optical system can be inexpensively constituted.
JP62164705A 1987-07-01 1987-07-01 Scanning optical system Expired - Fee Related JP2626708B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62164705A JP2626708B2 (en) 1987-07-01 1987-07-01 Scanning optical system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62164705A JP2626708B2 (en) 1987-07-01 1987-07-01 Scanning optical system

Publications (2)

Publication Number Publication Date
JPS649412A true JPS649412A (en) 1989-01-12
JP2626708B2 JP2626708B2 (en) 1997-07-02

Family

ID=15798311

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62164705A Expired - Fee Related JP2626708B2 (en) 1987-07-01 1987-07-01 Scanning optical system

Country Status (1)

Country Link
JP (1) JP2626708B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1939666A1 (en) * 2006-12-26 2008-07-02 Canon Kabushiki Kaisha Optical scanning device and image forming apparatus using the same
CN114706280A (en) * 2022-05-18 2022-07-05 广东科视光学技术股份有限公司 DI lithography machine system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1939666A1 (en) * 2006-12-26 2008-07-02 Canon Kabushiki Kaisha Optical scanning device and image forming apparatus using the same
US7522324B2 (en) 2006-12-26 2009-04-21 Canon Kabushiki Kaisha Optical scanning device and image forming apparatus using the same
CN114706280A (en) * 2022-05-18 2022-07-05 广东科视光学技术股份有限公司 DI lithography machine system
CN114706280B (en) * 2022-05-18 2022-10-18 广东科视光学技术股份有限公司 DI lithography machine system

Also Published As

Publication number Publication date
JP2626708B2 (en) 1997-07-02

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