JPS5677865A - Optical reflection system - Google Patents
Optical reflection systemInfo
- Publication number
- JPS5677865A JPS5677865A JP15302579A JP15302579A JPS5677865A JP S5677865 A JPS5677865 A JP S5677865A JP 15302579 A JP15302579 A JP 15302579A JP 15302579 A JP15302579 A JP 15302579A JP S5677865 A JPS5677865 A JP S5677865A
- Authority
- JP
- Japan
- Prior art keywords
- image
- aperture
- reflective surface
- detection part
- lens 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 Control For Cameras (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
- Lenses (AREA)
Abstract
PURPOSE:To realize a miniature, inexpensive system whose aperture adjustment is facilitated by performing the luminous photometry of a substance surface by forming a reflective surface in a semitransparent reflective surface and then by providing a light quantity detection part behind the semitransparent reflective surface. CONSTITUTION:To measure the brightness of subject surface P, light from subject surface P enters light quantity detection part 4 by way of image-forming lens system L, aperture 1 and semitransparent reflective surface 2. From the exposure obtained by light quantity detection part 4, the proper exposure for copying or photographing is determined to adjust aperture 1 automatically. In the copying or photographing, the light from subject surface P passes through image-forming lens system L and aperture 1, is reflected by semitransparent reflective surface 2 and passes through aperture 1 and image-forming lens system L to form its image on image surface Q.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15302579A JPS5677865A (en) | 1979-11-28 | 1979-11-28 | Optical reflection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15302579A JPS5677865A (en) | 1979-11-28 | 1979-11-28 | Optical reflection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5677865A true JPS5677865A (en) | 1981-06-26 |
Family
ID=15553310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15302579A Pending JPS5677865A (en) | 1979-11-28 | 1979-11-28 | Optical reflection system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5677865A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS597354A (en) * | 1982-07-05 | 1984-01-14 | Canon Inc | Density detector of original for copying machine |
| JPS59116762A (en) * | 1982-12-24 | 1984-07-05 | Canon Inc | Image density controller in image forming device |
| US6205161B1 (en) * | 1996-03-01 | 2001-03-20 | Agfa-Gevaert Aktiengesellschaft | Method and device for operating a laser diode |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5393834A (en) * | 1977-01-28 | 1978-08-17 | Ricoh Co Ltd | Exposure illuminance detector of copying machine |
-
1979
- 1979-11-28 JP JP15302579A patent/JPS5677865A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5393834A (en) * | 1977-01-28 | 1978-08-17 | Ricoh Co Ltd | Exposure illuminance detector of copying machine |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS597354A (en) * | 1982-07-05 | 1984-01-14 | Canon Inc | Density detector of original for copying machine |
| JPH0357465B2 (en) * | 1982-07-05 | 1991-09-02 | Canon Kk | |
| JPS59116762A (en) * | 1982-12-24 | 1984-07-05 | Canon Inc | Image density controller in image forming device |
| US6205161B1 (en) * | 1996-03-01 | 2001-03-20 | Agfa-Gevaert Aktiengesellschaft | Method and device for operating a laser diode |
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