JPH0365113U - - Google Patents
Info
- Publication number
- JPH0365113U JPH0365113U JP12619189U JP12619189U JPH0365113U JP H0365113 U JPH0365113 U JP H0365113U JP 12619189 U JP12619189 U JP 12619189U JP 12619189 U JP12619189 U JP 12619189U JP H0365113 U JPH0365113 U JP H0365113U
- Authority
- JP
- Japan
- Prior art keywords
- polygon mirror
- reflective surface
- light source
- laser light
- converging 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.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 6
Landscapes
- Dot-Matrix Printers And Others (AREA)
- Laser Beam Printer (AREA)
- Mechanical Optical Scanning Systems (AREA)
- Lenses (AREA)
Description
第１図は請求項１記載の考案の実施例を示す斜
視図、第２図は側面図、第３図は光路説明図、第
４図は補正レンズの平面図、第５図及び第６図は
光路説明図、第７図は各誤差の特性図、第８図は
ビーム形状の説明図、第９図は請求項２記載の考
案の実施例を示す光路説明図、第１０図は従来例
を示す平面図、第１１図は本出願人が過去に提案
した先行技術を示す斜視図、第１２図は光路説明
図、第１３図はポリゴンミラーの平面図、第１４
図は補正レンズの平面図、第１５図は他の先行技
術の斜視図である。
５……シリンドリカルレンズ、７……レーザ光
源、８……駆動装置、９……回転軸、１０……ポ
リゴンミラー、１１……反射面、１８，２２……
光走査装置、２０……収束レンズ、Ｓ……仮想収
束点、△ｌ……収束レンズとポリゴンミラーの反
射面との間隔、△ｌ′……収束レンズとレーザ光
源との間隔。
FIG. 1 is a perspective view showing an embodiment of the invention as claimed in claim 1, FIG. 2 is a side view, FIG. 3 is an explanatory diagram of the optical path, FIG. 4 is a plan view of the correction lens, and FIGS. 5 and 6. 7 is an explanatory diagram of the optical path, FIG. 7 is a characteristic diagram of each error, FIG. 8 is an explanatory diagram of the beam shape, FIG. 9 is an explanatory diagram of the optical path showing an embodiment of the invention as claimed in claim 2, and FIG. 10 is a conventional example. 11 is a perspective view showing a prior art proposed by the present applicant in the past, FIG. 12 is an explanatory diagram of an optical path, FIG. 13 is a plan view of a polygon mirror, and FIG.
The figure is a plan view of the correction lens, and FIG. 15 is a perspective view of another prior art. 5... Cylindrical lens, 7... Laser light source, 8... Drive device, 9... Rotating shaft, 10... Polygon mirror, 11... Reflective surface, 18, 22...
Optical scanning device, 20...Converging lens, S...Virtual convergence point, Δl... Distance between the converging lens and the reflective surface of the polygon mirror, Δl'... Distance between the converging lens and the laser light source.
Claims (1)
を駆動装置の回転軸に取付け、前記ポリゴンミラ
ーの反射面にレーザ光源の出射光がスキユー入射
するポストオブジエクテイブ型の光走査装置にお
いて、反射面が主走査方向に負のパワーを有する
曲面からなるポリゴンミラーを形成し、前記レー
ザ光源から前記ポリゴンミラーの反射面に至る光
路上に前記レーザ光源の出射光を仮想収束点上に
結像する一個の収束レンズを配置し、前記レーザ
光源と前記収束レンズとの間隔を３〜２０（mm）
として前記収束レンズと前記ポリゴンミラーの反
射面との間隔を５０（mm）以下としたことを特徴
とする光走査装置。 ２ 収束レンズからポリゴンミラーに至る光路上
に透過光を副走査方向に収束するシリンドリカル
レンズを配置したことを特徴とする請求項１記載
の光走査装置。[Claims for Utility Model Registration] 1. A post-objective in which a polygon mirror with a continuous reflective surface on its outer periphery is attached to the rotating shaft of a drive device, and the emitted light from a laser light source is skewed onto the reflective surface of the polygon mirror. In this type of optical scanning device, a polygon mirror whose reflective surface is a curved surface having negative power in the main scanning direction is formed, and the emitted light from the laser light source is directed onto an optical path from the laser light source to the reflective surface of the polygon mirror. A converging lens that forms an image on a virtual converging point is arranged, and the distance between the laser light source and the converging lens is 3 to 20 (mm).
An optical scanning device characterized in that a distance between the converging lens and the reflective surface of the polygon mirror is 50 (mm) or less. 2. The optical scanning device according to claim 1, further comprising a cylindrical lens that converges the transmitted light in the sub-scanning direction on the optical path from the converging lens to the polygon mirror.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989126191U JP2525272Y2 (en) | 1989-10-27 | 1989-10-27 | Optical scanning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989126191U JP2525272Y2 (en) | 1989-10-27 | 1989-10-27 | Optical scanning device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0365113U true JPH0365113U (en) | 1991-06-25 |
| JP2525272Y2 JP2525272Y2 (en) | 1997-02-05 |
Family
ID=31674020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989126191U Expired - Lifetime JP2525272Y2 (en) | 1989-10-27 | 1989-10-27 | Optical scanning device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2525272Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61156020A (en) * | 1984-12-28 | 1986-07-15 | Ricoh Co Ltd | Post objective type light deflecting system |
| JPS6420519A (en) * | 1987-07-16 | 1989-01-24 | Seiko Epson Corp | Optical scanner |
-
1989
- 1989-10-27 JP JP1989126191U patent/JP2525272Y2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61156020A (en) * | 1984-12-28 | 1986-07-15 | Ricoh Co Ltd | Post objective type light deflecting system |
| JPS6420519A (en) * | 1987-07-16 | 1989-01-24 | Seiko Epson Corp | Optical scanner |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2525272Y2 (en) | 1997-02-05 |