JPS57173808A - Image reader - Google Patents
Image readerInfo
- Publication number
- JPS57173808A JPS57173808A JP6045881A JP6045881A JPS57173808A JP S57173808 A JPS57173808 A JP S57173808A JP 6045881 A JP6045881 A JP 6045881A JP 6045881 A JP6045881 A JP 6045881A JP S57173808 A JPS57173808 A JP S57173808A
- Authority
- JP
- Japan
- Prior art keywords
- made incident
- luminous flux
- photodetector
- incident
- reflection
- 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
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
- G02B27/1013—Beam splitting or combining systems for splitting or combining different wavelengths for colour or multispectral image sensors, e.g. splitting an image into monochromatic image components on respective sensors
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/1086—Beam splitting or combining systems operating by diffraction only
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Focusing (AREA)
- Automatic Focus Adjustment (AREA)
Abstract
PURPOSE:To provide a prescribed optical path length difference to plural split luminous fluxes, to make the luminous flux vertically incident to each photodetector, and also to reduce the incidence of a stray light to the photodetector, by forming a vapor-deposited film on the surface of a large block and a small block of a transparent body, and making a reflection surface. CONSTITUTION:A vapor-deposited film is formed on each reflection surface 12, 13, 111 and 112 of a large block 3 and a small block 11 of a transparent body, and it is made a reflection surface. A light which has been made incident to a splitting means 2 consisting of a diffraction grating which has placed a plurality of lattice lines on an incident surface 21 of an optical splitter unit 1 is diffracted, is split to plural luminous fluxes, a luminous flux 41 is reflected by the reflection surfaces 111, 112, and is made incident vertically to a photodetector 61. A luminous flux 43 travels straight, is made incident vertically to a photodetector 62, and a luminous flux 45 is reflected by the reflection surfaces 12, 13, and is made incident vertically to a photodetecting surface 63. Between each luminous flux 41-45 made incident to the photodetectors 61-63, a prescribed optical path length difference is generated, and a stray light made incident to the photodetectors 61-63 is reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6045881A JPS57173808A (en) | 1981-04-20 | 1981-04-20 | Image reader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6045881A JPS57173808A (en) | 1981-04-20 | 1981-04-20 | Image reader |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57173808A true JPS57173808A (en) | 1982-10-26 |
Family
ID=13142838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6045881A Pending JPS57173808A (en) | 1981-04-20 | 1981-04-20 | Image reader |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57173808A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7754069B2 (en) | 2003-03-26 | 2010-07-13 | Komatsu Ltd. | Filter for trapping foreign matter |
-
1981
- 1981-04-20 JP JP6045881A patent/JPS57173808A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7754069B2 (en) | 2003-03-26 | 2010-07-13 | Komatsu Ltd. | Filter for trapping foreign matter |
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