JPS5748708A - Reflex objective lens - Google Patents

Reflex objective lens

Info

Publication number
JPS5748708A
JPS5748708A JP55124002A JP12400280A JPS5748708A JP S5748708 A JPS5748708 A JP S5748708A JP 55124002 A JP55124002 A JP 55124002A JP 12400280 A JP12400280 A JP 12400280A JP S5748708 A JPS5748708 A JP S5748708A
Authority
JP
Japan
Prior art keywords
space
lens
positive
common object
concave reflecting
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
JP55124002A
Other languages
Japanese (ja)
Inventor
Taira Kochiwa
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 JP55124002A priority Critical patent/JPS5748708A/en
Publication of JPS5748708A publication Critical patent/JPS5748708A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • G02B17/008—Systems specially adapted to form image relays or chained systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/24—Optical objectives specially designed for the purposes specified below for reproducing or copying at short object distances
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • G02B17/08—Catadioptric systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • G02B17/08—Catadioptric systems
    • G02B17/0856—Catadioptric systems comprising a refractive element with a reflective surface, the reflection taking place inside the element, e.g. Mangin mirrors

Landscapes

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

Abstract

PURPOSE:To obtain 100% aperture efficiency while holding a high contrast with a wide angle of view by correcting aberrations by arranging three positive, negative and positive lenses from a common object and image space side and a concave reflecting mirror having a reflecting surface facing the common object and image space side, and by making the lens system meet specific requirements. CONSTITUTION:The 1st positive lens L1, 2nd negative lens L2, 3rd positive lens L3, and a concave reflecting mirror M having a concave reflecting surface facing the side of common object and image space 1 are arranged successively from the side of space 1, and while the surface of the 2nd negative lens at the space 1 side is convex to the space 1 side, the lens system meets requirements shown by conditional inequalities (a)-(e). Consequently, various aberrations are corrected excellently, a high contrast is held over the entire plane of an an-use angle of view, and aperture efficiency is increased up to 100% even at the circumferential part of an image-formation screen.
JP55124002A 1980-09-09 1980-09-09 Reflex objective lens Pending JPS5748708A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55124002A JPS5748708A (en) 1980-09-09 1980-09-09 Reflex objective lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55124002A JPS5748708A (en) 1980-09-09 1980-09-09 Reflex objective lens

Publications (1)

Publication Number Publication Date
JPS5748708A true JPS5748708A (en) 1982-03-20

Family

ID=14874602

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55124002A Pending JPS5748708A (en) 1980-09-09 1980-09-09 Reflex objective lens

Country Status (1)

Country Link
JP (1) JPS5748708A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01279218A (en) * 1988-05-02 1989-11-09 Dainippon Screen Mfg Co Ltd Apochromat lens
US6081335A (en) * 1997-06-25 2000-06-27 Nec Corporation Phase difference measuring device with visible light source for providing easy alignment of optical axes and method therefor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01279218A (en) * 1988-05-02 1989-11-09 Dainippon Screen Mfg Co Ltd Apochromat lens
US6081335A (en) * 1997-06-25 2000-06-27 Nec Corporation Phase difference measuring device with visible light source for providing easy alignment of optical axes and method therefor

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