JPS5581336A - Slit lighting device in copying machine - Google Patents
Slit lighting device in copying machineInfo
- Publication number
- JPS5581336A JPS5581336A JP9616479A JP9616479A JPS5581336A JP S5581336 A JPS5581336 A JP S5581336A JP 9616479 A JP9616479 A JP 9616479A JP 9616479 A JP9616479 A JP 9616479A JP S5581336 A JPS5581336 A JP S5581336A
- Authority
- JP
- Japan
- Prior art keywords
- reflecting mirror
- focus
- slit
- width
- main axis
- 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)
- Light Sources And Details Of Projection-Printing Devices (AREA)
Abstract
PURPOSE: To improve the lighting efficiency and achieve uniformity of illumination distribution, by using three reflecting mirrors.
CONSTITUTION: An upper reflecting mirror 11a shaped in tubular elliptical surface, divided into two parts by the main axis, and having first and second focuses Ia, Ib on the main axis, and a lower reflecting mirror 11b having first focus IIa and second focus IIb coinciding with the first focus Ia on the main axis are disposed in obliquely lower positions in a slit having a width a of a stage glass 10, and a third reflecting mirror 12 is provided between the upper reflecting mirror 11a and the second focus Ib thereof. Thus setting up, the light from a light source 13 reflected by the upper reflecting mirror 11a is further reflected by the third reflecting mirror 12 and illuminates the slit having width a in the midway of running towards the second focus Ib, while the light from the light source 13 reflected by the lower reflecting mirror 11b illuminates the slit of width a direclty in the midway of running toward the second focus IIb. Therefore, the slit is illuminated at a relatively small incident angle from the obliquely lower part from the opposite sides, so that the intended purpose may be attained.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9616479A JPS5581336A (en) | 1979-07-30 | 1979-07-30 | Slit lighting device in copying machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9616479A JPS5581336A (en) | 1979-07-30 | 1979-07-30 | Slit lighting device in copying machine |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP49089974A Division JPS5123724A (en) | 1974-08-06 | 1974-08-06 | Fukushakitoniokeru suritsutoshomeisochi |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5581336A true JPS5581336A (en) | 1980-06-19 |
Family
ID=14157692
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9616479A Pending JPS5581336A (en) | 1979-07-30 | 1979-07-30 | Slit lighting device in copying machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5581336A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0316143U (en) * | 1989-06-30 | 1991-02-18 |
-
1979
- 1979-07-30 JP JP9616479A patent/JPS5581336A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0316143U (en) * | 1989-06-30 | 1991-02-18 |
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