JPS6410209A - Polygon mirror - Google Patents
Polygon mirrorInfo
- Publication number
- JPS6410209A JPS6410209A JP16546787A JP16546787A JPS6410209A JP S6410209 A JPS6410209 A JP S6410209A JP 16546787 A JP16546787 A JP 16546787A JP 16546787 A JP16546787 A JP 16546787A JP S6410209 A JPS6410209 A JP S6410209A
- Authority
- JP
- Japan
- Prior art keywords
- support body
- gas
- hollow chamber
- polygon
- rotary
- 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
- Sliding-Contact Bearings (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
- Mechanical Optical Scanning Systems (AREA)
Abstract
PURPOSE:To improve the perpendicularity and parallelism of a polygon mirror by interposing a slide member between a rotary body and a support body, enclosing a hollow chamber wherein the polygon rotor is put by the support body and a cover body fitted thereupon, and charging gas which is small in concentration to air in the hollow chamber. CONSTITUTION:The slide member 10 made of a ceramic material where a groove 11 for dynamic pressure generation, i.e. spiral groove is formed is interposed and arranged between the rotary body 3 and support body 4, the hollow chamber 20 wherein the polygon rotor can be interposed is enclosed by the support body 4, the cover body 12 fitted thereupon, and a seal material 23 such as an O ring, charged with the gas which is small in concentration to air, and put in operation under reduced pressure. In this case, helium gas is used as the charged gas. Consequently, the perpendicularity and parallelism of the polygon rotor are improved and the windage loss at the time of rotary operation is reduced greatly to enable fast rotation.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16546787A JPH0677111B2 (en) | 1987-07-03 | 1987-07-03 | Polygon mirror |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16546787A JPH0677111B2 (en) | 1987-07-03 | 1987-07-03 | Polygon mirror |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6410209A true JPS6410209A (en) | 1989-01-13 |
JPH0677111B2 JPH0677111B2 (en) | 1994-09-28 |
Family
ID=15812968
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16546787A Expired - Lifetime JPH0677111B2 (en) | 1987-07-03 | 1987-07-03 | Polygon mirror |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0677111B2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01245217A (en) * | 1988-03-28 | 1989-09-29 | Copal Electron Co Ltd | Optical deflector |
JPH02141722U (en) * | 1989-04-28 | 1990-11-29 | ||
US5373391A (en) * | 1992-02-26 | 1994-12-13 | Ebara Corporation | Polygon mirror with embedded yoke |
US6980340B1 (en) | 1999-09-09 | 2005-12-27 | Fuji Xerox Co., Ltd. | Rotary deflector, optical scanning unit and image forming apparatus |
-
1987
- 1987-07-03 JP JP16546787A patent/JPH0677111B2/en not_active Expired - Lifetime
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01245217A (en) * | 1988-03-28 | 1989-09-29 | Copal Electron Co Ltd | Optical deflector |
JPH02141722U (en) * | 1989-04-28 | 1990-11-29 | ||
US5373391A (en) * | 1992-02-26 | 1994-12-13 | Ebara Corporation | Polygon mirror with embedded yoke |
US6980340B1 (en) | 1999-09-09 | 2005-12-27 | Fuji Xerox Co., Ltd. | Rotary deflector, optical scanning unit and image forming apparatus |
Also Published As
Publication number | Publication date |
---|---|
JPH0677111B2 (en) | 1994-09-28 |
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