Laser scanning unit and laser printer
A laser scanning, laser beam technology, applied in optical components, optics, electrography, etc., can solve problems such as the overall cost of the printer, the lack of market competitiveness, and the increase in the processing and manufacturing cost of the laser scanning unit, and achieve a compact structure. , the effect of shortening the optical path distance and reducing the space occupied
Active Publication Date: 2021-08-10
沂普光电(天津)有限公司
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Problems solved by technology
However, since the two sets of surfaces of the FTL lens used need to be designed as free-form surfaces that meet the requirements of the optical path, the appearance of multiple sets of free-form surfaces has resulted in a significant increase in the cost of processing, manufacturing and assembly of the laser scanning unit composed of this form. , which is not conducive to the control of the overall cost of the printer, resulting in the lack of market competitiveness of the equipment
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[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0031] It should be noted that when a component is said to be "fixed" to another component, it can be directly on the other component or there can also be an intervening component. When a component is said to be "connected" to another component, it may be directly connected to the other component or there may be intervening components at the same time. When a component is said to be "set on" another component, it may be set directly on the other component or t...
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The invention relates to the technical field of laser printing equipment, and discloses a laser scanning unit. The laser scanning unit comprises a laser divergence assembly used for irradiating laser beams reflected by a reflector group to a light receiving surface of a photosensitive drum at equal intervals, and the laser divergence assembly comprises an aspherical lens and a free-form surface reflector. Laser beams reflected by the reflector group sequentially penetrate through the first aspheric surface and the second aspheric surface of the aspheric lens and then irradiate the reflecting surface of the free-form surface reflector. The combination of the aspherical lens and the free-form surface reflector is arranged to irradiate the laser beams on the light receiving surface of a photosensitive drum at equal intervals, so that the number of the free-form surfaces in the scanning unit can be reduced to one group, and the manufacturing cost of the scanning unit and the mounting difficulty can be greatly reduced; in addition, the light path can be changed through the reflection of the free-form surface reflector, so that the spatial layout of each component in the scanning unit can be changed and optimized, and the overall structure becomes more compact.
Description
technical field [0001] The invention relates to the technical field of laser printing equipment, in particular to a laser scanning unit and a laser printer. Background technique [0002] Currently used printers mainly use laser scanning units to copy images and texts. Common laser scanning units such as figure 2 As shown, it includes laser generator, collimating lens group, polygon mirror motor, FTL lens and light receiving surface. The laser beam emitted by the laser generator is a divergent beam. The divergent beam passes through the collimator lens group and focuses on the mirror surface of the polygon mirror motor once; the laser beam reflected by the polygon mirror motor diverges and passes through the FTL lens, and is focused on the surface of the light receiving surface for the second time. Focus to form a spot. The photosensitive coating on the surface of the light-receiving surface receives the energy of the light spot and generates a potential difference to form ...
Claims
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IPC IPC(8): G02B26/12G03G15/00
CPCG02B26/12G03G15/00
Inventor 郭跃武徐航宇李文艳侯健
Owner 沂普光电(天津)有限公司