JPS5766414A - Projection lens device - Google Patents

Projection lens device

Info

Publication number
JPS5766414A
JPS5766414A JP14276180A JP14276180A JPS5766414A JP S5766414 A JPS5766414 A JP S5766414A JP 14276180 A JP14276180 A JP 14276180A JP 14276180 A JP14276180 A JP 14276180A JP S5766414 A JPS5766414 A JP S5766414A
Authority
JP
Japan
Prior art keywords
lens system
lens
projection lens
stages
hyperbolic
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
JP14276180A
Other languages
Japanese (ja)
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 JP14276180A priority Critical patent/JPS5766414A/en
Publication of JPS5766414A publication Critical patent/JPS5766414A/en
Pending 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
    • G02B13/24—Optical objectives specially designed for the purposes specified below for reproducing or copying at short object distances
    • G02B13/26—Optical objectives specially designed for the purposes specified below for reproducing or copying at short object distances for reproducing with unit magnification

Landscapes

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

Abstract

PURPOSE:To improve aberration characteristics and contrast and to remove flare by arranging three stages of lenses and by making at least one lens surface of each lens element into a rotary hyperbolic surface. CONSTITUTION:A lens system is composed of three stages; when the focal length of the lens system is -1, the parameters are so set that r1=r3=r5=-r2=-r4= -r6=0.90136, d1=d3=d5=0.21258, d2=d4=1.55895. Further, the refractive index of the entire lens system is 1.491, the F number is 3.36, and an object distance is -2.0549; and the 2nd and 5th surfaces are made into rotary hyperbolic surfaces. As for the shapes of those hyperbolic surfaces, when Y<2>=2rix-epsilonX<2> (i=2 or 5), epsilon is set to -3.7, correcting aberrations excellently. This lens system when arrayed is used as the projection lens of a copying machine, etc.
JP14276180A 1980-10-13 1980-10-13 Projection lens device Pending JPS5766414A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14276180A JPS5766414A (en) 1980-10-13 1980-10-13 Projection lens device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14276180A JPS5766414A (en) 1980-10-13 1980-10-13 Projection lens device

Publications (1)

Publication Number Publication Date
JPS5766414A true JPS5766414A (en) 1982-04-22

Family

ID=15322958

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14276180A Pending JPS5766414A (en) 1980-10-13 1980-10-13 Projection lens device

Country Status (1)

Country Link
JP (1) JPS5766414A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5150259A (en) * 1990-07-30 1992-09-22 Mitsubishi Rayon Company Ltd. Optical imaging device
US5270859A (en) * 1992-01-30 1993-12-14 United Technologies Corporation Optical instrument with micro-lenses
US5291334A (en) * 1992-01-30 1994-03-01 United Technologies Corporation Micro-lens panoramic imager
US6021003A (en) * 1998-03-09 2000-02-01 Fujitsu Limited Optical device
FR2925178A1 (en) * 2007-12-18 2009-06-19 Valeo Systemes Thermiques OPTICAL SYSTEM PARTICIPATING IN A DEVICE FOR DISPLAYING INFORMATION RELATING TO THE IMPLEMENTATION OF AN ACCESSORY OF A MOTOR VEHICLE

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52117144A (en) * 1976-03-26 1977-10-01 Seiko Epson Corp Wide angle lens

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52117144A (en) * 1976-03-26 1977-10-01 Seiko Epson Corp Wide angle lens

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5150259A (en) * 1990-07-30 1992-09-22 Mitsubishi Rayon Company Ltd. Optical imaging device
US5270859A (en) * 1992-01-30 1993-12-14 United Technologies Corporation Optical instrument with micro-lenses
US5291334A (en) * 1992-01-30 1994-03-01 United Technologies Corporation Micro-lens panoramic imager
US6021003A (en) * 1998-03-09 2000-02-01 Fujitsu Limited Optical device
FR2925178A1 (en) * 2007-12-18 2009-06-19 Valeo Systemes Thermiques OPTICAL SYSTEM PARTICIPATING IN A DEVICE FOR DISPLAYING INFORMATION RELATING TO THE IMPLEMENTATION OF AN ACCESSORY OF A MOTOR VEHICLE
WO2009077543A1 (en) * 2007-12-18 2009-06-25 Valeo Systemes Thermiques Optical system comprising a device for displaying information relative to the implementation of an automobile accessory

Similar Documents

Publication Publication Date Title
JPS56133711A (en) Photographic lens of short overall length
JPS57108818A (en) Projection lens
JPS5744115A (en) Reflex telephoto zoom lens system
JPS5432319A (en) Fish eye lens
JPS5735822A (en) Zoom lens
JPS5720713A (en) Zoom lens
JPS5734515A (en) Refracting index type optical system for video projector
US4017161A (en) Compact zoom lens
JPS5411727A (en) Telephoto lens
JPS53112759A (en) Microscope objective lens
JPS5691210A (en) Eyepiece lens optical system
JPS5397824A (en) Camera lens of behind iris
JPS5766414A (en) Projection lens device
JPS57624A (en) Albada type reverse-galilean finder
US1937168A (en) Projecting lens
JPS5655915A (en) Zoom lens
JPS5348537A (en) Microscope objective lens
JPS54622A (en) Copying lens
JPS5779909A (en) Optical system for astronomical telescope
JPS53112760A (en) Wide field microscopic objective lens
JPS53109626A (en) Aberration variable lens
JPS5753718A (en) Zoom lens system
JPS57172310A (en) Zoom lens
JPS5678815A (en) Refractive optical system of television projection device
JPS55159409A (en) Larger aperture photographic lens