JPH01128318U - - Google Patents
Info
- Publication number
- JPH01128318U JPH01128318U JP2309088U JP2309088U JPH01128318U JP H01128318 U JPH01128318 U JP H01128318U JP 2309088 U JP2309088 U JP 2309088U JP 2309088 U JP2309088 U JP 2309088U JP H01128318 U JPH01128318 U JP H01128318U
- Authority
- JP
- Japan
- Prior art keywords
- light beam
- lens
- optical path
- scanning device
- photoreceptor
- 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
- 230000003287 optical effect Effects 0.000 claims 4
- 108091008695 photoreceptors Proteins 0.000 claims 3
- 238000010586 diagram Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Landscapes
- Mechanical Optical Scanning Systems (AREA)
- Laser Beam Printer (AREA)
Description
第１図は本考案実施例の概略平面図、第２図は
第１図の側面図、第３図は従来の一般的な光ビー
ム走査装置の斜視図、第４図は従来の問題点を説
明するための説明図である。
４……ポリゴンミラー、６……感光ドラム、２
２……半導体レーザ、２４……コリメートレンズ
、２６……シリンドリカルレンズ、２８……第１
ｆθレンズ、３０……第２ｆθレンズ、３２……
プリズム、３４，３６……シリンドリカルミラー
。
FIG. 1 is a schematic plan view of an embodiment of the present invention, FIG. 2 is a side view of FIG. 1, FIG. 3 is a perspective view of a conventional general light beam scanning device, and FIG. It is an explanatory diagram for explanation. 4...Polygon mirror, 6...Photosensitive drum, 2
2... Semiconductor laser, 24... Collimating lens, 26... Cylindrical lens, 28... First
fθ lens, 30...Second fθ lens, 32...
Prism, 34, 36...Cylindrical mirror.
Claims (1)
査し、該走査光ビームを回転多面鏡と感光体との
間に設けられた、走査速度補正用のｆθレンズに
より感光体上に集光する光ビーム走査装置におい
て、 前記ｆθレンズを低画角用の第１ｆθレンズと
高画角用の第２ｆθレンズにより構成して、該第
１及び第２ｆθレンズを上下２段に配置し、 回転多面鏡と前記第１及び第２ｆθレンズとの
間に走査光ビームの光路を第１ｆθレンズ又は第
２ｆθレンズに切換る光路切換手段を設け、 前記第１ｆθレンズ又は第２ｆθレンズを通過
した光ビームを感光体上の同一走査線上に集光す
るための第１及び第２ミラー手段を設けたことを
特徴とする光ビーム走査装置。 (2) 前記光路切換手段がプリズムであることを
特徴とする請求項(1)記載の光ビーム走査装置。 (3) 前記光路切換手段が音響光学変調器である
ことを特徴とする請求項(1)記載の光ビーム走査
装置。[Claims for Utility Model Registration] (1) An f-theta lens for scanning speed correction, which reflects and scans an incident light beam with a rotating polygon mirror, and is provided between the rotating polygon mirror and the photoreceptor. In a light beam scanning device that focuses light onto a photoreceptor, the fθ lens is composed of a first fθ lens for a low angle of view and a second fθ lens for a high angle of view, and the first and second fθ lenses an optical path switching means arranged between the rotating polygon mirror and the first and second fθ lenses for switching the optical path of the scanning light beam to the first fθ lens or the second fθ lens; 1. A light beam scanning device comprising first and second mirror means for focusing a light beam passing through the same scanning line on a photoreceptor. (2) The light beam scanning device according to claim (1), wherein the optical path switching means is a prism. (3) The light beam scanning device according to claim (1), wherein the optical path switching means is an acousto-optic modulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2309088U JPH01128318U (en) | 1988-02-25 | 1988-02-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2309088U JPH01128318U (en) | 1988-02-25 | 1988-02-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01128318U true JPH01128318U (en) | 1989-09-01 |
Family
ID=31241792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2309088U Pending JPH01128318U (en) | 1988-02-25 | 1988-02-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01128318U (en) |
-
1988
- 1988-02-25 JP JP2309088U patent/JPH01128318U/ja active Pending
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