JPS55144206A - Laser light deflector - Google Patents
Laser light deflectorInfo
- Publication number
- JPS55144206A JPS55144206A JP5392279A JP5392279A JPS55144206A JP S55144206 A JPS55144206 A JP S55144206A JP 5392279 A JP5392279 A JP 5392279A JP 5392279 A JP5392279 A JP 5392279A JP S55144206 A JPS55144206 A JP S55144206A
- Authority
- JP
- Japan
- Prior art keywords
- photodetector
- inclination
- angle
- optical mask
- rotary mirror
- 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.)
- Granted
Links
Landscapes
- Lasers (AREA)
- Mechanical Optical Scanning Systems (AREA)
- Facsimile Scanning Arrangements (AREA)
Abstract
PURPOSE:To obtain the light deflector by a rotary mirror which permits the correction of the angle of inclination by detecting the perpendicular position errors owing to the angle of inclination of the rotary mirror by using a photodetector having an optical mask or slit and driving a vertical deflecting system. CONSTITUTION:The photodetecting portion of a photodetector 7 having an optical mask is mounted outside the effective display range of a screen 2 at the scanning start side end of the screen 2. The optical mask 11 being the photodetecting portion of the photodetector 7 is provided with a triangular window shown by ABC, which is so disposed that the side AB becomes perpendicular to the scanning direction of a laser beam 3 and the side BC becomes oblique. As a result of this, the output of the photodetector 12 which performs photoelectric conversion provides the signals of different pulse widths such as a, b, c owing to the perpendicular position luctuations of the laser beam 3. Since the increment of the pulse width is proportional to the perpendicular position fluctuation components, the perpendicular fluctuations, i.e., the angle of inclination of the rotary mirror may be corrected by processing these signals.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5392279A JPS55144206A (en) | 1979-04-27 | 1979-04-27 | Laser light deflector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5392279A JPS55144206A (en) | 1979-04-27 | 1979-04-27 | Laser light deflector |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55144206A true JPS55144206A (en) | 1980-11-11 |
JPS6120849B2 JPS6120849B2 (en) | 1986-05-24 |
Family
ID=12956202
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5392279A Granted JPS55144206A (en) | 1979-04-27 | 1979-04-27 | Laser light deflector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55144206A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5970359A (en) * | 1982-10-15 | 1984-04-20 | Hitachi Ltd | Beam position detector of laser beam scanning system |
JPS60233617A (en) * | 1984-05-04 | 1985-11-20 | Ricoh Co Ltd | Stabilizing method of main scanning position of optical scanning device |
JPS6455515A (en) * | 1987-08-07 | 1989-03-02 | Xerox Corp | Rotary mirror scanner |
JPS6488516A (en) * | 1987-09-30 | 1989-04-03 | Shaken Kk | Detector for quantity of fluctuation of optical beam of optical scanner |
-
1979
- 1979-04-27 JP JP5392279A patent/JPS55144206A/en active Granted
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5970359A (en) * | 1982-10-15 | 1984-04-20 | Hitachi Ltd | Beam position detector of laser beam scanning system |
JPH0376063B2 (en) * | 1982-10-15 | 1991-12-04 | Hitachi Ltd | |
JPS60233617A (en) * | 1984-05-04 | 1985-11-20 | Ricoh Co Ltd | Stabilizing method of main scanning position of optical scanning device |
JPH0629912B2 (en) * | 1984-05-04 | 1994-04-20 | 株式会社リコー | Method for stabilizing main scanning position in optical scanning device |
JPS6455515A (en) * | 1987-08-07 | 1989-03-02 | Xerox Corp | Rotary mirror scanner |
JPS6488516A (en) * | 1987-09-30 | 1989-04-03 | Shaken Kk | Detector for quantity of fluctuation of optical beam of optical scanner |
Also Published As
Publication number | Publication date |
---|---|
JPS6120849B2 (en) | 1986-05-24 |
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