Surface-emitting laser array, optical scanning device, and image forming device

一种激光器阵列、表面发射的技术，应用在激光器、半导体激光器、光学等方向，能够解决激光器输出性能降低、可靠性下降等问题

CN101542854AActive Publication Date: 2009-09-23RICOH KK
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2009-09-23

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Abstract

The present invention provides a surface- emitting laser array, an optical scanning device and an image forming device. The surface-emitting laser array includes a plurality of light emitting parts arranged in a two-dimensional formation having two orthogonal directions. When the plurality of light emitting parts are orthogonally projected on a virtual line parallel to one of the two orthogonal directions, a spacing between two of the plurality of light emitting parts along the virtual line is equal to an integral multiple of a predetermined value. The plurality of light emitting parts include a first light emitting part, a second light emitting part adjacent to the first light emitting part, and a third light emitting part adjacent to the second light emitting part, and a spacing between the first and second light emitting parts differs from a spacing between the second and third light emitting parts.
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Description

technical field

[0001] The present invention relates to a surface-emitting laser array in which surface-emitting laser elements are arranged two-dimensionally, an optical scanning device including the surface-emitting laser array, and an imaging apparatus including the surface-emitting laser array. Background technique

[0002] In electrophotographic imaging, an imaging method using a laser beam is widely used in order to obtain high-density image quality. In electrophotographic image forming, a method of forming an electrophotographic latent image on a photosensitive drum is generally adopted in that a laser beam output from a polygon mirror is aligned along the axial direction of the photosensitive drum while the photosensitive drum is rotating (sub-scanning). The surface of the photosensitive drum is optically scanned (main scan).

[0003] In this electrophotographic imaging, high-speed formation of high-density images is required. If the image resolution is doubled for...

Examples

Embodiment Construction

[0041] Various embodiments of the present invention will be described below with reference to these drawings.

[0042] figure 1 The structure of a laser printer 1000 as an image forming apparatus in the embodiment of the present invention is shown. This laser printer 1000 includes an optical scanning device 1010, a photosensitive drum 1030, a charging device 1031, a developing roller 1032, a transfer charging device 1033, a discharging device 1034, a cleaning blade 1035, a toner cartridge 1036, a paper feeding roller 1037, a paper feeding Tray 1038 , Registration Roller Pair 1039 , Fixing Roller 1041 , Paper Out Roller 1042 , and Paper Out Tray 1043 .

[0043] A photosensitive layer is formed on the surface of the photosensitive drum 1030 . The surface of the photosensitive drum 1030 is the surface to be scanned. In this embodiment, the photosensitive drum 1032 is formed along the figure 1 Turn in the direction indicated by the arrow.

[0044] A charging device 1031 , a d...