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Optical device, optical member and image forming apparatus with the same

A technology of optical components and optical devices, which is applied in optical components, optics, image communication, etc., can solve the problems of difficult fθ lenses and fθ lenses in the correct direction, and achieve the effect of preventing reverse installation

Inactive Publication Date: 2014-12-17
KYOCERA DOCUMENT SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, in recent years, the aspherization of fθ lenses has been further developed, and it has become increasingly difficult for installers to visually judge the correct orientation of fθ lenses during installation.
Therefore, it is difficult to reliably prevent the fθ lens from being reversed by the anti-installation measures of the above-mentioned prior art, and it is necessary to more effectively prevent the fθ lens from being installed reversely.

Method used

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  • Optical device, optical member and image forming apparatus with the same
  • Optical device, optical member and image forming apparatus with the same
  • Optical device, optical member and image forming apparatus with the same

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Embodiment Construction

[0025] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. figure 1 It is a diagram schematically showing the internal structure of the image forming apparatus 1 according to the embodiment of the present invention. The image forming apparatus 1 is, for example, a printer, and as figure 1 Shown is a tandem color printer including image forming sections 2 (2M, 2C, 2Y, 2K) for forming toner images of different colors, magenta (M) and cyan (C). , yellow (Y) and black (K). Each image forming unit 2M, 2C, 2Y, 2K includes a developer 3 , a charger 5 , an exposure device 6 (optical device), a toner supply unit 7 , a cleaner 21 , and a primary transfer roller 9 .

[0026] Each toner supply unit 7 stores one color of toner among magenta, cyan, yellow, and black. Each developing unit 3 includes a developing roller 24 for supplying toner supplied from the toner supply unit 7 to the photosensitive drum 4 . The developing ...

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Abstract

An optical device includes a laser light source for outputting a laser beam; an optical member including an aspherical lens with an incident surface on which the laser beam is incident and an output surface from which the laser beam is output, and adapted to scan the laser beam output from the output surface across a predetermined target; and a housing for housing the optical member. The optical member further includes a first positioning portion at a side of the incident surface and a second positioning portion at a side of the output surface. The housing includes a first engaging portion to be engaged with the first positioning portion and a second engaging portion to be engaged with the second positioning portion. The first and second positioning portions have mutually different shapes.

Description

technical field [0001] The present invention relates to an optical device, an optical member, and an image forming apparatus including the optical device for scanning laser light on a predetermined object, such as a photosensitive drum. Background technique [0002] In image forming apparatuses such as copiers, printers, and facsimiles, an optical apparatus that scans a predetermined object with laser light is used as an exposure apparatus (laser scanning unit (LSU)). The exposure device forms an electrostatic latent image on the photosensitive drum by scanning the laser light on the photosensitive drum based on the image information. [0003] The basic structural elements of the exposure device include: a laser light source for outputting laser light, a collimator lens, a cylindrical lens, a polyhedral prism, an fθ lens, and a reflector. Among them, the important function of the fθ lens is to scan the photosensitive drum with the laser light reflected by the polyhedral pri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B26/10G02B7/02G03G15/04
CPCH04N1/0283G03G21/1666G02B7/022H04N1/113G02B3/04G02B26/125
Inventor 土屋浩昭
Owner KYOCERA DOCUMENT SOLUTIONS INC