JP2001235696A5 - - Google Patents
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- JP2001235696A5 JP2001235696A5 JP2000378264A JP2000378264A JP2001235696A5 JP 2001235696 A5 JP2001235696 A5 JP 2001235696A5 JP 2000378264 A JP2000378264 A JP 2000378264A JP 2000378264 A JP2000378264 A JP 2000378264A JP 2001235696 A5 JP2001235696 A5 JP 2001235696A5
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- Prior art keywords
- scanning
- light emitting
- optical system
- sub
- point
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Claims (7)
前記半導体レーザアレイの個数をn(n≧2)、発光点の副走査方向ピッチをds、走査線間隔をPとしたとき、前記発光点から被走査面上の結像点に至る走査光学系全系の副走査方向の幾何学的な横倍率βが
β=P・n・k/ds (ここで、kは正の整数)
なる式を満たすことを特徴とするマルチビーム走査装置。A multi-beam in which a plurality of pairs of a semiconductor laser array in which a plurality of light emitting points are arranged on a straight line and a single collimator lens for coupling a plurality of light beams emitted from the semiconductor laser array are arranged as a pair In a multi-beam scanning device using a light source device,
A scanning optical system from the light emitting point to the imaging point on the surface to be scanned, where n is the number of the semiconductor laser arrays (n ≧ 2), the pitch of the light emitting points is ds, and the scanning line interval is P The geometric lateral magnification β in the sub-scanning direction of the entire system is β = P · n · k / ds (where k is a positive integer)
A multi-beam scanning device characterized by satisfying the following formula:
前記半導体レーザアレイの個数をn(n≧4)、発光点の副走査方向ピッチをds、走査線間隔をPとしたとき、前記発光点から被走査面上の結像点に至る走査光学系全系の副走査方向の幾何学的な横倍率βがA scanning optical system from the light emitting point to the imaging point on the scanning surface, where n is the number of the semiconductor laser arrays (n ≧ 4), ds is the pitch in the sub-scanning direction of the light emitting points, and P is the scanning line interval. The geometric lateral magnification β in the sub-scanning direction of the entire system is
β=P・n・k/ds (ここで、kは正の整数)β = P · n · k / ds (where k is a positive integer)
なる式を満たすことを特徴とするマルチビーム走査装置。A multi-beam scanning device characterized by satisfying the following formula:
Lm/fy−βm/β1≦1
なる関係を満たすことを特徴とする請求項1又は2記載のマルチビーム走査装置。The scanning optical system includes a first scanning optical system from the light emitting point to the deflection point of the polygon mirror and a second scanning optical system from the deflection point to the imaging point. When the optical path length from the point to the imaging point is Lm, the sub-scan magnification in the entire first scanning optical system is β1, and the main scanning magnification in the entire second scanning optical system is βm, the first The scanning optical system 1 includes an optical element that is disposed in the vicinity of the polygon mirror and focuses the light beam on the polygon mirror in the sub-scanning. A focal length fy in the sub-scanning direction of the optical element is
Lm / fy-βm / β1 ≦ 1
Multi-beam scanning apparatus according to claim 1 or 2, wherein satisfies the following relationship.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000378264A JP4090685B2 (en) | 1999-12-17 | 2000-12-13 | Multi-beam scanning apparatus and image forming apparatus |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11-358270 | 1999-12-17 | ||
JP35827099 | 1999-12-17 | ||
JP2000378264A JP4090685B2 (en) | 1999-12-17 | 2000-12-13 | Multi-beam scanning apparatus and image forming apparatus |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2001235696A JP2001235696A (en) | 2001-08-31 |
JP2001235696A5 true JP2001235696A5 (en) | 2005-06-23 |
JP4090685B2 JP4090685B2 (en) | 2008-05-28 |
Family
ID=26580756
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2000378264A Expired - Fee Related JP4090685B2 (en) | 1999-12-17 | 2000-12-13 | Multi-beam scanning apparatus and image forming apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP4090685B2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4121285B2 (en) * | 2002-02-18 | 2008-07-23 | 株式会社リコー | Light source module, light source device, optical scanning device, and image forming apparatus |
US7333254B2 (en) | 2002-03-15 | 2008-02-19 | Ricoh Company, Ltd. | Optical scanning apparatus, illuminant apparatus and image forming apparatus |
JP4728584B2 (en) * | 2004-03-08 | 2011-07-20 | 株式会社リコー | Optical scanning apparatus, image forming apparatus, and color image forming apparatus |
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2000
- 2000-12-13 JP JP2000378264A patent/JP4090685B2/en not_active Expired - Fee Related
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