JPS56123511A - Telecentric projection lens - Google Patents

Telecentric projection lens

Info

Publication number
JPS56123511A
JPS56123511A JP2773680A JP2773680A JPS56123511A JP S56123511 A JPS56123511 A JP S56123511A JP 2773680 A JP2773680 A JP 2773680A JP 2773680 A JP2773680 A JP 2773680A JP S56123511 A JPS56123511 A JP S56123511A
Authority
JP
Japan
Prior art keywords
lens
group
positive
single lens
object boundary
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
JP2773680A
Other languages
Japanese (ja)
Other versions
JPH0225488B2 (en
Inventor
Masamichi Tatsuoka
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP2773680A priority Critical patent/JPS56123511A/en
Priority to US06/238,412 priority patent/US4441792A/en
Priority to DE19813108018 priority patent/DE3108018A1/en
Publication of JPS56123511A publication Critical patent/JPS56123511A/en
Publication of JPH0225488B2 publication Critical patent/JPH0225488B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/22—Telecentric objectives or lens systems

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

PURPOSE:To obtain a bright lens in which various aberrations are corrected excellently and the magnification is used around 1/10, by satisfying the prescribed conditions, in the lens system of 3 group constitution consisting of positive single lens, negative single lens and two positive lenses in the order from the object boundary. CONSTITUTION:In the lens system of 3 group constitution consisting of positive single lens, negative single lens and two positive lenses in the order from the object boundary, the conditions of equations (1)-(3) are satisfied. The 2nd group consists of two concave lenses, and either one positive lenses of the 3rd group has stuck plane in which the curvature center is in existence at the object boundary. Further, f1, f2, f3 are focal lengths of the 1st, 2nd and 3rd groups, and (f) is the focal length of the entire lens system. Thus, various aberrations are corrected excellently, and the telecentric projection lens in which the magnification is used around 1/10 and the F number is comparatively bright is obtained.
JP2773680A 1980-03-04 1980-03-04 Telecentric projection lens Granted JPS56123511A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2773680A JPS56123511A (en) 1980-03-04 1980-03-04 Telecentric projection lens
US06/238,412 US4441792A (en) 1980-03-04 1981-02-26 Telecentric projection lenses
DE19813108018 DE3108018A1 (en) 1980-03-04 1981-03-03 "TELECENTRIC PROJECTION LENS"

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2773680A JPS56123511A (en) 1980-03-04 1980-03-04 Telecentric projection lens

Publications (2)

Publication Number Publication Date
JPS56123511A true JPS56123511A (en) 1981-09-28
JPH0225488B2 JPH0225488B2 (en) 1990-06-04

Family

ID=12229308

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2773680A Granted JPS56123511A (en) 1980-03-04 1980-03-04 Telecentric projection lens

Country Status (1)

Country Link
JP (1) JPS56123511A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4913540A (en) * 1988-07-30 1990-04-03 Asahi Kogaku Kogyo Kabushiki Kaisha Telecentric projection lens system
US8854746B2 (en) 2012-12-25 2014-10-07 Largan Precision Co., Ltd Image capturing optical lens system
US10551595B2 (en) 2014-11-12 2020-02-04 Largan Precision Co., Ltd. Photographing optical lens assembly, image capturing device and electronic device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0575202U (en) * 1992-03-13 1993-10-15 株式会社アジクリエーション Trash can
ITBS20130179A1 (en) * 2013-11-29 2015-05-30 Claudio Sedazzari APPARATUS FOR ARTIFICIAL VISION

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51143326A (en) * 1975-06-03 1976-12-09 Minolta Camera Co Ltd Front iris large aperture lens

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51143326A (en) * 1975-06-03 1976-12-09 Minolta Camera Co Ltd Front iris large aperture lens

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4913540A (en) * 1988-07-30 1990-04-03 Asahi Kogaku Kogyo Kabushiki Kaisha Telecentric projection lens system
US8854746B2 (en) 2012-12-25 2014-10-07 Largan Precision Co., Ltd Image capturing optical lens system
US10551595B2 (en) 2014-11-12 2020-02-04 Largan Precision Co., Ltd. Photographing optical lens assembly, image capturing device and electronic device
US10712541B2 (en) 2014-11-12 2020-07-14 Largan Precision Co., Ltd. Photographing optical lens assembly, image capturing device and electronic device
US10871637B2 (en) 2014-11-12 2020-12-22 Largan Precision Co., Ltd. Photographing optical lens assembly, image capturing device and electronic device
US11262556B2 (en) 2014-11-12 2022-03-01 Largan Precision Co., Ltd. Photographing optical lens assembly, image capturing device and electronic device
US11614604B2 (en) 2014-11-12 2023-03-28 Largan Precision Co., Ltd. Photographing optical lens assembly, image capturing device and electronic device
US11867886B2 (en) 2014-11-12 2024-01-09 Largan Precision Co., Ltd. Photographing optical lens assembly, image capturing device and electronic device

Also Published As

Publication number Publication date
JPH0225488B2 (en) 1990-06-04

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