Optical scanning device and image forming device

Abstract

The invention provides an optical scanning device and an image forming device. The optical scanning device comprises a light source used for diverging a light beam, a first optical unit used for enabling the light beam emitted by the light source to be collimated in a main scanning direction and to be focused in an auxiliary scanning direction, an optical deflector used for deflecting the light beam emitted by the light source, and an imaging optical system used for guiding the light beam deflected by the optical deflector to a scanned surface to be imaged. When the optical deflector is used for deflecting the light beam emitted by the light source at a maximum deflection angle, the emergent light beam of the imaging optical system forms a maximum incident included angle phi max together with a normal line of the scanned surface in the main scanning direction, and the light spot inclination rate, defined in the description, of a light spot formed on the scanned surface by the imaging optical system meets a condition defined in the description, so that the possibility of edge blur of a transfer image is reduced, and the optical scanning imaging quality is improved.

Description

technical field [0001] The present invention relates to optical scanning technology, in particular to an optical scanning device and an image forming device. Background technique [0002] Optical scanning equipment is widely used in image forming fields such as printing and imaging, graphic copying, laser coding and medical imaging. For example, in printers or copiers that form images on recording media, an optical scanning device is used to scan the scanned surface of the photosensitive drum to form an electrostatic latent image, which is then developed and transferred to the paper surface for printing or copying. However, the size of the optical scanning device has a great influence on the volume of the overall product. In order to reduce the volume of the overall product, it is necessary to realize the miniaturization of the optical scanning device on the premise of ensuring the scanning accuracy and scanning quality. [0003] In the existing optical scanning equipment, ...

AI Technical Summary

Problems solved by technology

[0004] However, if the maximum scanning incident angle of the beam incident on the photosensitive drum is too large, the position of the exposure point at both ends of the edge of the photosensitive drum will be tilted, thereby increasing the actual size of the exposure point, which will cause the edge of the transferred image to be blurred.

The imaging quality of existing optical scanning equipment is not high

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