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Optical scanning device for scanning light beam and image forming device including same

A technology of optical scanning device and light beam, which is applied in the field of optical scanning device and image forming device, and can solve problems such as trouble

Active Publication Date: 2020-10-30
KYOCERA DOCUMENT SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, it is more troublesome to set the appropriate target value

Method used

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  • Optical scanning device for scanning light beam and image forming device including same
  • Optical scanning device for scanning light beam and image forming device including same
  • Optical scanning device for scanning light beam and image forming device including same

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0023] The image forming apparatus 10 of the first embodiment is an apparatus that performs image forming processing by electrophotography. The image forming process is a process of forming an image on a sheet. The sheet is a sheet-like image forming medium such as paper or film.

[0024] The image forming apparatus 10 includes a sheet supply mechanism 2 , a sheet conveyance mechanism 3 , an image forming unit 4 , a control unit 8 , and the like.

[0025] The sheet supply mechanism 2 sends the sheet to the conveyance path 30 in the device. The sheet conveyance mechanism 3 conveys the sheet along the conveyance path 30 . The sheet conveyance mechanism 3 includes a registration roller pair 31 . The pair of registration rollers 31 temporarily stops the sheet before it reaches the image forming unit 4 to adjust the conveyance timing of the sheet.

[0026] The image forming section 4 executes the image forming process by electrophotography. The image forming unit 4 includes a ...

no. 2 approach

[0106] Below, side reference Figure 5 with Image 6 The processing of the mask 6x included in the image forming apparatus 10x of the second embodiment and the shift detection unit 85 in the image forming apparatus 10x will be described.

[0107] exist Figure 5 , Image 6 in, with Figure 1 ~ Figure 4The same constituent elements as the illustrated constituent elements are given the same reference numerals. The image forming apparatus 10x has the photomask 6 in the image forming apparatus 10 replaced with Figure 5 The composition of the photomask 6x is shown.

[0108] The mask 6x of the image forming apparatus 10x includes the first light shielding portion 61x and the second light shielding portion 62x similarly to the mask 6 of the image forming apparatus 10 . The first light shielding area A31 shielded by the first light shielding portion 61x and the second light shielding area A32 shielded by the second light shielding portion 62x respectively divide the first area ...

no. 3 approach

[0118] Below, side reference Figure 7 and Figure 8 The processing of the mask 6y included in the image forming apparatus 10y of the third embodiment and the shift detection unit 85 in the image forming apparatus 10y will be described.

[0119] exist Figure 7 , Figure 8 in, with Figure 1 to Figure 6 The same constituent elements as the illustrated constituent elements are given the same reference numerals. However, as described later, Figure 8 The use of reference symbol T02 in, and Figure 4 , Image 6 The reference symbol T02 in has a slightly different meaning.

[0120] In the image forming apparatus 10y, the mask 6x in the image forming apparatus 10x is replaced by Figure 7 The configuration of the photomask 6y is shown.

[0121] The mask 6y of the image forming apparatus 10y includes the first light shielding portion 61x and the second light shielding portion 62x similarly to the mask 6x of the image forming apparatus 10x. The first light shielding area A3...

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Abstract

An object of the present invention is to provide an optical scanning device and an image forming device capable of detecting whether the position of the light beam in the sub-scanning direction falls within the target range and the distance from the target without requiring troublesome analog adjustments. The offset of the target range. In the optical scanning device, the first light-shielding section and the second light-shielding section respectively block the first light-shielding area and the first light-shielding area of ​​a part of the first area on the side of the strip-shaped target area on the light receiving surface of the optical sensor, respectively. The incidence of the second light-shielding area of ​​a part of the second area on the other side. The first light-shielding area and the second light-shielding area are respectively formed from a first base end portion and a second base end portion between two ends along the main scanning direction of the target area toward the sub-scanning direction. The first side edge and the second side edge at both ends of the first side edge are regions where the width in the main scanning direction gradually expands.

Description

technical field [0001] The present invention relates to an optical scanning device and an image forming apparatus including the optical scanning device. Background technique [0002] In general, an electrophotographic image forming apparatus includes an optical scanning device that scans a light beam on the surface of a photoreceptor. An electrostatic latent image is written on the surface of the photoreceptor by the light beam scanned by the light scanning device. [0003] In the optical scanning device, a scanning mirror such as a polygon mirror scans in the main scanning direction while reflecting the light beam. And, a light sensor disposed on the scanning path of the light beam detects that the light beam is received. In addition, the control unit controls the writing timing of the electrostatic latent image written by the light beam according to the timing when the optical sensor generates a detection signal. [0004] In addition, it is known that a photomask having...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B26/10G02B26/12G03G15/04
CPCG02B26/105G02B26/12G03G15/04G02B26/127G03G15/04072G03G2215/0404G03G15/0409G03G15/5008G02B26/10
Inventor 京极正法
Owner KYOCERA DOCUMENT SOLUTIONS INC