[go: up one dir, main page]

JPS6471285A - Projection optical system - Google Patents

Projection optical system

Info

Publication number
JPS6471285A
JPS6471285A JP62227731A JP22773187A JPS6471285A JP S6471285 A JPS6471285 A JP S6471285A JP 62227731 A JP62227731 A JP 62227731A JP 22773187 A JP22773187 A JP 22773187A JP S6471285 A JPS6471285 A JP S6471285A
Authority
JP
Japan
Prior art keywords
optical axis
optical system
lens group
lens
light
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
JP62227731A
Other languages
Japanese (ja)
Inventor
Akinaga Horiuchi
Sadahiko Tsuji
Hisanori Hirose
Koichi Mogi
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 JP62227731A priority Critical patent/JPS6471285A/en
Publication of JPS6471285A publication Critical patent/JPS6471285A/en
Pending legal-status Critical Current

Links

Landscapes

  • Projection Apparatus (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)

Abstract

PURPOSE:To always obtain bright pattern on a screen without uneven lighting by displacing the optical axis of a light optical system in matching with the displacement of the optical axis of a projective lens in obtaining a gate effect by lens group of a part or all the projecting lenses. CONSTITUTION:All or part of lens group in projective lenses 3 is displaced with respect to the optical axis 6 so as to generate a gate effect. In this case, the light source 1 is tilted in following to the displacement of the lens group while moving the light source 1 in parallel with the direction orthogonal to the optixal axis 6 to make the optical axis 5 of the light optical system coincident with the optical axis 6 of the projecting lens 3.
JP62227731A 1987-09-11 1987-09-11 Projection optical system Pending JPS6471285A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62227731A JPS6471285A (en) 1987-09-11 1987-09-11 Projection optical system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62227731A JPS6471285A (en) 1987-09-11 1987-09-11 Projection optical system

Publications (1)

Publication Number Publication Date
JPS6471285A true JPS6471285A (en) 1989-03-16

Family

ID=16865476

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62227731A Pending JPS6471285A (en) 1987-09-11 1987-09-11 Projection optical system

Country Status (1)

Country Link
JP (1) JPS6471285A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0356925U (en) * 1989-10-09 1991-05-31
JPH04166823A (en) * 1990-10-31 1992-06-12 Hitachi Ltd Projection type liquid crystal display device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0356925U (en) * 1989-10-09 1991-05-31
JPH04166823A (en) * 1990-10-31 1992-06-12 Hitachi Ltd Projection type liquid crystal display device

Similar Documents

Publication Publication Date Title
FR2582780B1 (en) LIGHTING DEVICE, PARTICULARLY ADJUSTABLE SCENIC PROJECTOR ACCORDING TO ALL ITS PARAMETERS
SE7316669L (en)
EP0825473A3 (en) Projector apparatus
CA2057084A1 (en) Light irradiating apparatus having light emitting diode used as light source
JPS5455420A (en) Slit illuminator
MY113452A (en) Projection system comprising a free form reflector and a free form lens
EP0288983A3 (en) Means for projecting patterns of light
EP0402146A3 (en) Prismatic illuminator for flat panel display
JPS6471285A (en) Projection optical system
JPS5557840A (en) Overhead projector capable of projecting on vertical plane
JPS52132851A (en) Optical detector of scanning type
JPS5683705A (en) Projector
JPS6442821A (en) Lighting device
JPS5610777A (en) Running direction display unit of manual reading device
ES2129103T3 (en) LIGHTING WITH ADJUSTABLE OPTICAL EFFECT.
JPS57154218A (en) Reader
EP0302737A3 (en) Multi-bulb light source
JPS53147507A (en) Focus position controller
JPS545753A (en) Photo switch
JPS52126241A (en) Slit illumination device
JPS51144229A (en) Bright wide-angle lens with many surrounding quantities of light
JPS52100775A (en) Fluorescent lamp
JPS5581337A (en) Lighting device for exposure in slit exposure type copying machine
JPH0491302U (en)
JPS5296538A (en) Reflecting screen