JPS57135910A - Wide-angle lens for collimating light from microluminous body - Google Patents

Wide-angle lens for collimating light from microluminous body

Info

Publication number
JPS57135910A
JPS57135910A JP2181281A JP2181281A JPS57135910A JP S57135910 A JPS57135910 A JP S57135910A JP 2181281 A JP2181281 A JP 2181281A JP 2181281 A JP2181281 A JP 2181281A JP S57135910 A JPS57135910 A JP S57135910A
Authority
JP
Japan
Prior art keywords
lens
wide
angle lens
microluminous
focal length
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
JP2181281A
Other languages
Japanese (ja)
Other versions
JPH0237563B2 (en
Inventor
Yukio Ogura
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP2181281A priority Critical patent/JPH0237563B2/en
Publication of JPS57135910A publication Critical patent/JPS57135910A/en
Publication of JPH0237563B2 publication Critical patent/JPH0237563B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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 -
    • G02B9/34—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having four components only

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Microscoopes, Condenser (AREA)
  • Lenses (AREA)

Abstract

PURPOSE:To obtain a low-cost wide-angle lens having a large numerical aperture, by arranging four positive and meniscus lenses so that respective centers of curvatures of all lens faces are on the object side of these lens faces. CONSTITUTION:All of lenses 1-4 are positive and meniscus lenses and are so arranged that centers of curvatures of all lens faces are on the object side of lens faces. When a focal length (f) as the whole of the lens system is denoted as 100, conditions of expressions are satisfied. A focal length f3 of the lens 3 and a focal length f4 of the lens 4 are set to satisfy 5.98f<=f3 <=6.6f and 6.73f<=f4<=7.43f, thereby realizing a wide-angle lens which collimates the light from a minute luminous body and has a large numerical aperture and is low-cost.
JP2181281A 1981-02-17 1981-02-17 BISHOHATSUKOTAIKARANOHIKARIOKORIMEETOSURUKOKAKURENZU Expired - Lifetime JPH0237563B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2181281A JPH0237563B2 (en) 1981-02-17 1981-02-17 BISHOHATSUKOTAIKARANOHIKARIOKORIMEETOSURUKOKAKURENZU

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2181281A JPH0237563B2 (en) 1981-02-17 1981-02-17 BISHOHATSUKOTAIKARANOHIKARIOKORIMEETOSURUKOKAKURENZU

Publications (2)

Publication Number Publication Date
JPS57135910A true JPS57135910A (en) 1982-08-21
JPH0237563B2 JPH0237563B2 (en) 1990-08-24

Family

ID=12065464

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2181281A Expired - Lifetime JPH0237563B2 (en) 1981-02-17 1981-02-17 BISHOHATSUKOTAIKARANOHIKARIOKORIMEETOSURUKOKAKURENZU

Country Status (1)

Country Link
JP (1) JPH0237563B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60185922A (en) * 1984-03-06 1985-09-21 Asahi Optical Co Ltd Optical system for semiconductor laser
CN104712924A (en) * 2013-12-15 2015-06-17 天津华彩电子科技工程集团有限公司 LED remote project lamp
CN106154571A (en) * 2016-09-13 2016-11-23 山东镭泽智能科技有限公司 Total refraction optical system for LED light source collimation
WO2019148639A1 (en) * 2018-01-30 2019-08-08 江西联益光学有限公司 Collimating lens

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111123535B (en) * 2018-10-31 2021-06-11 上海微电子装备（集团）股份有限公司 Optical alignment system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60185922A (en) * 1984-03-06 1985-09-21 Asahi Optical Co Ltd Optical system for semiconductor laser
JPH0449092B2 (en) * 1984-03-06 1992-08-10 Asahi Optical Co Ltd
CN104712924A (en) * 2013-12-15 2015-06-17 天津华彩电子科技工程集团有限公司 LED remote project lamp
CN106154571A (en) * 2016-09-13 2016-11-23 山东镭泽智能科技有限公司 Total refraction optical system for LED light source collimation
CN106154571B (en) * 2016-09-13 2021-02-23 山东镭泽智能科技有限公司 Full-refraction optical system for LED light source collimation
WO2019148639A1 (en) * 2018-01-30 2019-08-08 江西联益光学有限公司 Collimating lens

Also Published As

Publication number Publication date
JPH0237563B2 (en) 1990-08-24

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