JPH0342116U

JPH0342116U -

Info

Publication number: JPH0342116U
Application number: JP10106589U
Authority: JP
Priority date: 1989-08-31
Filing date: 1989-08-31
Publication date: 1991-04-22
Anticipated expiration: 2004-08-31
Also published as: JP2536711Y2

Description

[Brief explanation of drawings]

第１図は本考案によるレーザビーム走査装置の
一実施例の分解斜視図、第２図は本考案によるレ
ーザビーム走査装置の一実施例の平面図、第３図
は第１図におけるホルダ部の縦断面図、第４図は
第１図におけるホルダ部の平面図、第５図は調整
治具の一例を示す平面図、第６図は一般的なカラ
ー画像形成装置の構成図、第７図は従来例による
レーザビーム走査装置の斜視図、第８図、第９図
は１本のレーザビームの光学系の説明図、第１０
図は感光体上のレーザビーム走査線の軌跡の説明
図、第１１図はシリンドリカルレンズの斜視図、
第１２図は光学ハウジングの変形状態の説明図で
ある。５……ｆθレンズ、１３……光学ハウジング、
２６……シリンドリカルレンズ、２７……半導体
レーザ、２８……コリメートレンズ、３４，３５
……レーザレンズユニツト。 FIG. 1 is an exploded perspective view of an embodiment of the laser beam scanning device according to the present invention, FIG. 2 is a plan view of an embodiment of the laser beam scanning device according to the present invention, and FIG. 3 is a view of the holder portion in FIG. 1. 4 is a plan view of the holder section in FIG. 1, FIG. 5 is a plan view showing an example of an adjustment jig, FIG. 6 is a configuration diagram of a general color image forming apparatus, and FIG. 7 is a longitudinal sectional view. is a perspective view of a conventional laser beam scanning device, FIGS. 8 and 9 are explanatory diagrams of an optical system for one laser beam, and FIG. 10 is a perspective view of a conventional laser beam scanning device.
The figure is an explanatory diagram of the locus of the laser beam scanning line on the photoreceptor, and Figure 11 is a perspective view of the cylindrical lens.
FIG. 12 is an explanatory diagram of a deformed state of the optical housing. 5...fθ lens, 13...optical housing,
26... Cylindrical lens, 27... Semiconductor laser, 28... Collimating lens, 34, 35
...Laser lens unit.

Claims

[Scope of utility model registration request]

It has a plurality of laser light sources modulated by independent image signals and a plurality of corresponding photoreceptors, and the laser beams emitted from the plurality of laser light sources are scanned by a deflector onto the respective corresponding photoreceptors,
In a laser beam scanning device in a color image forming apparatus that superimposes images formed on respective photoconductors to obtain a single image, a laser light source;
A collimating lens that converts the laser beam emitted from the laser light source into a substantially parallel beam, a cylindrical lens that has a curvature in the sub-scanning cross section, and a lens that focuses the laser beam onto the photoconductor and scans it at a substantially constant speed. 1. A laser beam scanning device characterized in that a plurality of laser lens units each having an fθ lens are independently and removably provided in an optical housing.