JPS6450011A - Optical writing head - Google Patents
Optical writing headInfo
- Publication number
- JPS6450011A JPS6450011A JP20772887A JP20772887A JPS6450011A JP S6450011 A JPS6450011 A JP S6450011A JP 20772887 A JP20772887 A JP 20772887A JP 20772887 A JP20772887 A JP 20772887A JP S6450011 A JPS6450011 A JP S6450011A
- Authority
- JP
- Japan
- Prior art keywords
- reflecting plate
- sign
- path
- distance
- optical 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
- Dot-Matrix Printers And Others (AREA)
- Laser Beam Printer (AREA)
- Mechanical Optical Scanning Systems (AREA)
Abstract
PURPOSE:To obtain a small-sized optical writing device by providing such an optical system that the distance from a polygon mirror to the surface of a photosensitive body is constant. CONSTITUTION:A sign A indicates the path on a laser light surface to be swept from the polygon mirror 3 to a 1st reflecting plate 5, a sign B the path from the 1st reflecting plate 5 to a 2nd reflecting plate 6, and a sign C the path from the 2nd reflecting plate 6 to the photosensitive drum 8 through a 3rd reflecting plate 7. Here, the distance from a semiconductor laser 1 to the surface of the photosensitive drum 8 can be made constant by shaping the 1st reflecting plate 5 and 2nd reflecting plate 6 so that A+B+C=An+Bn+Cn. Thus, the need for an f-theta lens and a special shape polygon mirror is eliminated by making the distance of laser light from the semiconductor laser 1 to the surface of the photosensitive body drum 8 constant by employing a combination of a plane and a curved surface for the optical system, thereby reducing the size of the optical system.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20772887A JPS6450011A (en) | 1987-08-21 | 1987-08-21 | Optical writing head |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20772887A JPS6450011A (en) | 1987-08-21 | 1987-08-21 | Optical writing head |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6450011A true JPS6450011A (en) | 1989-02-27 |
Family
ID=16544558
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20772887A Pending JPS6450011A (en) | 1987-08-21 | 1987-08-21 | Optical writing head |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6450011A (en) |
-
1987
- 1987-08-21 JP JP20772887A patent/JPS6450011A/en active Pending
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