JPS56135815A - Lens for optical scanning - Google Patents

Lens for optical scanning

Info

Publication number
JPS56135815A
JPS56135815A JP3932480A JP3932480A JPS56135815A JP S56135815 A JPS56135815 A JP S56135815A JP 3932480 A JP3932480 A JP 3932480A JP 3932480 A JP3932480 A JP 3932480A JP S56135815 A JPS56135815 A JP S56135815A
Authority
JP
Japan
Prior art keywords
lens
lenses
face
focal length
positive
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
JP3932480A
Other languages
Japanese (ja)
Other versions
JPS6233565B2 (en
Inventor
Muneo Kuroda
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.)
Minolta Co Ltd
Original Assignee
Minolta 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 Minolta Co Ltd filed Critical Minolta Co Ltd
Priority to JP3932480A priority Critical patent/JPS56135815A/en
Publication of JPS56135815A publication Critical patent/JPS56135815A/en
Publication of JPS6233565B2 publication Critical patent/JPS6233565B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/12—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having three components only

Abstract

PURPOSE:To obtain f, theta lenses which exceed 50 deg. in angle of view, are well corrected of various aberrations and are less in the number of lens elements by satisfying prescribed conditions in a lens system consisting of a negative lens, a positive lens, and a positive lens successively from the incident pupil. CONSTITUTION:In a lens system consisting of negative, positive and positive lenses successively from the incident pupil, the conditions of the inequalities (1)- (6) and d2<d4 are satisfied. Here, r2, r3, r5 are the radii of curvature of the face on the 2nd lens side of the 1st lens, the face on the 1st lens side of the 2nd lens, and the face of the 2nd lens side of the 3rd lenses, respectively, f is the focal length of the entire system, e1, e2 are the reduced spaces between the 1st and 2nd lenses and between the 2nd and 3rd lenses, respectively, f1 is the focal length of the 1st lens f'4,5,6 is the composite focal length of the face on the 3rd lens side of the 2nd lens and the 3rd lens, f2 is the focal length of the 2nd lens and d2, d3 are the air spaces between the 1st and 2nd lenses and between the 2nd and 3rd lenses. Thereby, the f, theta lens which exceed 50 deg. in the angle of view, are well corrected of various aberrations and are of less number of lens elements are obtained.
JP3932480A 1980-03-26 1980-03-26 Lens for optical scanning Granted JPS56135815A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3932480A JPS56135815A (en) 1980-03-26 1980-03-26 Lens for optical scanning

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3932480A JPS56135815A (en) 1980-03-26 1980-03-26 Lens for optical scanning

Publications (2)

Publication Number Publication Date
JPS56135815A true JPS56135815A (en) 1981-10-23
JPS6233565B2 JPS6233565B2 (en) 1987-07-21

Family

ID=12549915

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3932480A Granted JPS56135815A (en) 1980-03-26 1980-03-26 Lens for optical scanning

Country Status (1)

Country Link
JP (1) JPS56135815A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57144726A (en) * 1981-03-02 1982-09-07 Kabel Metallwerke Ghh Manufacture of shrinkable member
JPS597918A (en) * 1982-07-06 1984-01-17 Asahi Optical Co Ltd F-theta lens system
JPS60153017A (en) * 1984-01-23 1985-08-12 Asahi Optical Co Ltd Large-diameter f-theta lens
JPS63104009A (en) * 1986-10-21 1988-05-09 Matsushita Electric Ind Co Ltd Constant speed scanning lens
JPS63313114A (en) * 1987-06-17 1988-12-21 Copal Electron Co Ltd Scanning optical system
WO2009132538A1 (en) * 2008-04-28 2009-11-05 深圳市大族激光科技股份有限公司 Optical lens
US8331043B2 (en) 2008-04-28 2012-12-11 Han's Laser Technology Co., Ltd. Optical lens
US8331044B2 (en) 2008-04-28 2012-12-11 Han's Laser Technology Co., Ltd. Fixed focal length optical lens system
US8363338B2 (en) 2008-04-28 2013-01-29 Han's Laser Technology Co., Ltd. Fixed focal length optical lens system
EP2908163A4 (en) * 2012-10-31 2016-08-03 Hans Laser Technology Ind Group Co Ltd F-theta lens and laser processing device for far-infrared laser processing
CN107577044A (en) * 2017-09-05 2018-01-12 大族激光科技产业集团股份有限公司 Lens group, optical lens assembly and laser cleaning hand-held set

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57144726A (en) * 1981-03-02 1982-09-07 Kabel Metallwerke Ghh Manufacture of shrinkable member
JPS597918A (en) * 1982-07-06 1984-01-17 Asahi Optical Co Ltd F-theta lens system
JPS6151289B2 (en) * 1982-07-06 1986-11-08 Asahi Optical Co Ltd
JPS60153017A (en) * 1984-01-23 1985-08-12 Asahi Optical Co Ltd Large-diameter f-theta lens
JPS6327684B2 (en) * 1984-01-23 1988-06-03 Asahi Optical Co Ltd
JPS63104009A (en) * 1986-10-21 1988-05-09 Matsushita Electric Ind Co Ltd Constant speed scanning lens
JPS63313114A (en) * 1987-06-17 1988-12-21 Copal Electron Co Ltd Scanning optical system
WO2009132538A1 (en) * 2008-04-28 2009-11-05 深圳市大族激光科技股份有限公司 Optical lens
US8331043B2 (en) 2008-04-28 2012-12-11 Han's Laser Technology Co., Ltd. Optical lens
US8331044B2 (en) 2008-04-28 2012-12-11 Han's Laser Technology Co., Ltd. Fixed focal length optical lens system
US8339717B2 (en) 2008-04-28 2012-12-25 Han's Laser Technology Co., Ltd. Optical lens
US8363338B2 (en) 2008-04-28 2013-01-29 Han's Laser Technology Co., Ltd. Fixed focal length optical lens system
EP2908163A4 (en) * 2012-10-31 2016-08-03 Hans Laser Technology Ind Group Co Ltd F-theta lens and laser processing device for far-infrared laser processing
CN107577044A (en) * 2017-09-05 2018-01-12 大族激光科技产业集团股份有限公司 Lens group, optical lens assembly and laser cleaning hand-held set

Also Published As

Publication number Publication date
JPS6233565B2 (en) 1987-07-21

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