JPS55155320A - Optical system for correcting scanner - Google Patents
Optical system for correcting scannerInfo
- Publication number
- JPS55155320A JPS55155320A JP6158579A JP6158579A JPS55155320A JP S55155320 A JPS55155320 A JP S55155320A JP 6158579 A JP6158579 A JP 6158579A JP 6158579 A JP6158579 A JP 6158579A JP S55155320 A JPS55155320 A JP S55155320A
- Authority
- JP
- Japan
- Prior art keywords
- correcting
- slit
- dust
- optical system
- 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 obtain stable timing pulses even if any dust and the like are produced on the correcting slit by making the sectional shape of the correcting laser beam lognitudinally long in the direction nearly perpendicular to the scanning direction of the laser beam.
CONSTITUTION: In the optical system for correcting scanner, a cylindrical lens 28 of, for example, focal length 700mm is disposed between a focusing lens 23 and galva mirror 24. Disposing the main axis of said lens 28 in the direction perpendicular to the beam deflecting face by the galva mirror 24 makes the beam spot produced in a correcting slit 25 slender and lets it be intensity-modulated according to the slit. This beam is then made to an electric signal by a photo detector 27. Now, if it is assumed that the slit width of the correcting slit 25 is 40μm, the beam spot 30 becomes 40μm in the scanning direction A and 300μm in the direction perpendicular to A. The electric signal obtainable from the photo detector does not become 0 even if dust 32 exists and therefore the effect of the dust may be eliminated and the stable timing pulses obtained by performing waveform shaping.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6158579A JPS55155320A (en) | 1979-05-21 | 1979-05-21 | Optical system for correcting scanner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6158579A JPS55155320A (en) | 1979-05-21 | 1979-05-21 | Optical system for correcting scanner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55155320A true JPS55155320A (en) | 1980-12-03 |
Family
ID=13175356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6158579A Pending JPS55155320A (en) | 1979-05-21 | 1979-05-21 | Optical system for correcting scanner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55155320A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017135224A1 (en) * | 2016-02-03 | 2017-08-10 | コニカミノルタ株式会社 | Object detection device of optical scanning type |
-
1979
- 1979-05-21 JP JP6158579A patent/JPS55155320A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017135224A1 (en) * | 2016-02-03 | 2017-08-10 | コニカミノルタ株式会社 | Object detection device of optical scanning type |
| EP3413078A4 (en) * | 2016-02-03 | 2019-03-13 | Konica Minolta, Inc. | Object detection device of optical scanning type |
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