JPS5589803A - Projector - Google Patents
ProjectorInfo
- Publication number
- JPS5589803A JPS5589803A JP16588678A JP16588678A JPS5589803A JP S5589803 A JPS5589803 A JP S5589803A JP 16588678 A JP16588678 A JP 16588678A JP 16588678 A JP16588678 A JP 16588678A JP S5589803 A JPS5589803 A JP S5589803A
- Authority
- JP
- Japan
- Prior art keywords
- bar
- optical system
- pair
- projection optical
- form lens
- 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
Abstract
PURPOSE: To make the manufacture of the projection apparatus of a small size and bright images by fitting two sets a pair of the specified bar-form lenses of a large outside diameter of the end part into the pipe holes of block materials thereby forming the compound eye projection optical system.
CONSTITUTION: A stepped bar-form lens 108 which is provided with light absorbing layers 106, 110 on the outer side and whose end parts are larger in outside diameter than fitting part and a stepped bar-form lens 109 similar to this as a pair are inserted into each pipe hole provided with a mask 104 for forming intermediate image of a block 112, whereby the compound eye projection optical system is formed. Hence, the conjugate distance is made short via the intermediate images corresponding to the respective parts of the object by the bar-form lens pair groups of the same optical axis of selected radii of curvature of both surfaces, effective diameters, effective lengths, refractive indices, etc., whereby the projection optical system of bright projection images and a small size is readily manufactured.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16588678A JPS5589803A (en) | 1978-12-28 | 1978-12-28 | Projector |
DE2951452A DE2951452A1 (en) | 1978-12-28 | 1979-12-20 | PROJECTION DEVICE |
US06/105,789 US4275962A (en) | 1978-12-28 | 1979-12-20 | Projection device |
GB7944021A GB2042759B (en) | 1978-12-28 | 1979-12-21 | Projection device |
FR7931862A FR2445544B1 (en) | 1978-12-28 | 1979-12-27 | MULTIPLE OBJECTIVE PROJECTION DEVICE FOR COPY MACHINES |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16588678A JPS5589803A (en) | 1978-12-28 | 1978-12-28 | Projector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5589803A true JPS5589803A (en) | 1980-07-07 |
Family
ID=15820837
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16588678A Pending JPS5589803A (en) | 1978-12-28 | 1978-12-28 | Projector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5589803A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008115990A (en) * | 2006-11-07 | 2008-05-22 | Hitachi Constr Mach Co Ltd | Hydraulic drive mechanism for construction machine |
JP2010128277A (en) * | 2008-11-28 | 2010-06-10 | Oki Data Corp | Lens array unit, optical head and information apparatus |
-
1978
- 1978-12-28 JP JP16588678A patent/JPS5589803A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008115990A (en) * | 2006-11-07 | 2008-05-22 | Hitachi Constr Mach Co Ltd | Hydraulic drive mechanism for construction machine |
JP2010128277A (en) * | 2008-11-28 | 2010-06-10 | Oki Data Corp | Lens array unit, optical head and information apparatus |
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