JPS64944A - Overhead projector - Google Patents
Overhead projectorInfo
- Publication number
- JPS64944A JPS64944A JP15722687A JP15722687A JPS64944A JP S64944 A JPS64944 A JP S64944A JP 15722687 A JP15722687 A JP 15722687A JP 15722687 A JP15722687 A JP 15722687A JP S64944 A JPS64944 A JP S64944A
- Authority
- JP
- Japan
- Prior art keywords
- optical axis
- projection lens
- projection
- plane perpendicular
- optical system
- 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
Links
Landscapes
- Overhead Projectors And Projection Screens (AREA)
Abstract
PURPOSE: To obtain uniform sharpness over an full image projected on a screen by providing a projection lens freely rotatably, centered about one straight line on a plane perpendicular to the optical axis of said lens which passes the intersection of the plane perpendicular to the optical axis of the projection lens and that of a projection optical system.
CONSTITUTION: Centering around the straight line, the projection lens 7 is freely rotatably provided on the plane perpendicular to the optical axis of the projection lens which passes the intersection of the plane perpendicular to the optical axis of the projection lens and that of the projection optical system. When an full image projected on the screen 9 is not clear, the projection lens 7 and an upper reflection mirror 8 are moved in the direction of the optical axis of the projection optical system to make a part of the image clear. When the projection lens 7 is turned by centering around one straight line on the plane perpendicular to the optical axis of the projection lens which passes the intersection of the plane perpendicular to the optical axis of the projection lens and that of the projection optical system, the full image on the screen 9 becomes clear. These actions are repeated several times, then the full clear, uniform image can be obtained on the screen 9 which is not perpendicular to the optical axis of the projection optical system.
COPYRIGHT: (C)1989,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62-157226A JPH01944A (en) | 1987-06-24 | overhead projector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62-157226A JPH01944A (en) | 1987-06-24 | overhead projector |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS64944A true JPS64944A (en) | 1989-01-05 |
JPH01944A JPH01944A (en) | 1989-01-05 |
Family
ID=
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5262434A (en) | Image distortion correction device for projector | |
JPS5271944A (en) | Projection-type color tv unit | |
JPS5694887A (en) | Projecting device | |
JPS5257824A (en) | Lens for copying | |
JPS5596933A (en) | Overhead projector | |
JPS51149004A (en) | Optical apparatus | |
JPS5557840A (en) | Overhead projector capable of projecting on vertical plane | |
JPS64944A (en) | Overhead projector | |
EP0277469A3 (en) | Projector apparatus | |
JPS5435623A (en) | Video projector | |
GB1523063A (en) | Method for taking or projecting a panoramic view and apparatus for the performance thereof | |
JPS548917A (en) | Telvision projector | |
JPS57197574A (en) | Copying machine | |
JPS5722231A (en) | Nondistortion image projector | |
JPS55114081A (en) | Television picture projector | |
JPS53122426A (en) | Projector | |
FR2455756A1 (en) | Epidiascope for transparencies and overlays - has dioptric lens which projects image onto fresnel lens on table for reflecting onto screen | |
JPS5560936A (en) | Simple episcope using overhead projector | |
JPS561965A (en) | Electrophotographic copier | |
JPS56151928A (en) | Full circumference sliding projector | |
JPS5257823A (en) | Light ray scanning device | |
JPS53138326A (en) | Projector | |
JPS5758173A (en) | Picture formation device | |
FR2373846A1 (en) | Horizon projector of aircraft simulator pref. using plane image - has wide angle optics projecting image onto concave spherical surface rotated about its centre | |
JPS5726837A (en) | Comparison projector |