JPS5590917A - Projector - Google Patents
ProjectorInfo
- Publication number
- JPS5590917A JPS5590917A JP16605478A JP16605478A JPS5590917A JP S5590917 A JPS5590917 A JP S5590917A JP 16605478 A JP16605478 A JP 16605478A JP 16605478 A JP16605478 A JP 16605478A JP S5590917 A JPS5590917 A JP S5590917A
- Authority
- JP
- Japan
- Prior art keywords
- bar
- projection
- telecentric
- block
- 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
- Exposure Or Original Feeding In Electrophotography (AREA)
- Lenses (AREA)
- Optical Systems Of Projection Type Copiers (AREA)
Abstract
PURPOSE: To obtain the high-performance projection optical system by specifically supoorting the specific bar-form lense groups with block materials in the projection system of the copying machine.
CONSTITUTION: The 1st bar-form lenses 101 being telecentric on the exit side and 2nd bar-form lens 102 being telecentric on the incident side, which have a uniform outside diameter and whose respective lengths in the optical axis direction are 2W60 times the effective diameter, are inserted into the through-holes of a block material 112 composed of metals or the like and are so fixed as to become perpendicularly coaxial to the object surface and projection surface. Intermediate field stops 104 are provided at the intermediate of the 1st, 2nd bar-form lenses 101, 102. As a result of this, the block bodies 112 perform lens holding and light shielding and the intermediate field stops 104 define the light intensity distributions on the projection surface, thus the projection optical system of superior optical performance is formed.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16605478A JPS5590917A (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 |
---|---|---|---|
JP16605478A JPS5590917A (en) | 1978-12-28 | 1978-12-28 | Projector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5590917A true JPS5590917A (en) | 1980-07-10 |
Family
ID=15824101
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16605478A Pending JPS5590917A (en) | 1978-12-28 | 1978-12-28 | Projector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5590917A (en) |
-
1978
- 1978-12-28 JP JP16605478A patent/JPS5590917A/en active Pending
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