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Method adjusting a write unit and apparatus for adjusting a write unit

A technology of writing unit and adjusting device, applied in the direction of measuring device, electrical components, optical components, etc., can solve the problem of not being able to correctly grasp the deviation of the reference pixel and the position of the laser, and the reference pixel being not specific.

Inactive Publication Date: 2009-05-13
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0029] This image measurement device can adjust the position of the area type (Elia type) CCD of the CCD camera to the area type CCD place that coincides with the imaging position of the area type CCD as a specific position, so there is as The reference pixel of the measured reference position is not specific, so the deviation between the reference pixel and the laser position cannot be accurately grasped

Method used

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  • Method adjusting a write unit and apparatus for adjusting a write unit
  • Method adjusting a write unit and apparatus for adjusting a write unit
  • Method adjusting a write unit and apparatus for adjusting a write unit

Examples

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no. 1 example

[0254] Reference below Figure 5 An example of the evaluation device is described.

[0255] in Figure 5 Here, 29 is a pulse motor for driving the polygonal prism 19, and 30 is a drive control circuit for driving and controlling this pulse motor. At the corresponding surface 31 to be scanned corresponding to the surface 26 of the photosensitive drum 25, from the scanning start side to the scanning end side of this light beam P1, area-type image pickup elements of CCD cameras 32 to 34 ( Camera surface) 32a~34a.

[0256] In other words, it is possible to arrange the CCD cameras 32 to 34 on the light beam irradiation unit (latent image carrier) that is irradiated by the light beam emitted from the writing unit of the image forming device (copier, etc.) mounted on the writing unit. When the light irradiation start position (the light irradiation start position of the maximum size of the paper), the light irradiation end position, and the intermediate position of ), the actual use posi...

no. 4 example

[0289] Figure 17 A fourth embodiment of this evaluation device is shown. It is provided with a guide shaft 46 in the depth direction (optical axis direction) Q4 orthogonal to the main scanning direction Q1 so that the movable body 45 can follow the guide shaft. 44 reciprocates in the main scanning direction Q1, and at the same time can reciprocate in the depth direction Q4 along the guide shaft 46. If this structure is adopted, a CCD camera 43 can be used to evaluate the beam characteristics at the required writing reference position predetermined during design.

[0290] This fourth embodiment can evaluate the evaluation items a to k, m, and since the CCD camera 43 can move in the depth direction Q4, it can also evaluate the evaluation item 1.

[0291] And in such as Figure 5 , Picture 10 , Picture 12 The evaluation device shown can also be equipped with a component that moves the CCD camera 43 in the depth direction. Figure 5 , Picture 10 , Picture 12 The evaluation devic...

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Abstract

At least two light beam detection units are spaced at a predetermined distance and provided in the scanning direction of a surface to be scanned. A light beam is emitted to the light beam detection unit provided on a scanning start side, by lighting a light beam source which is employed to scan the surface linearly during a scanning period equivalent to 1 dot during scanning. A light beam is emitted to the light beam detection unit provided on a scanning end side, by lighting the light beam source during the scanning period after elapse of a light-off period computed from a previously designed scanning speed and the predetermined distance. Based on a detection result of the light beam detection unit provided on the scanning start side and a detection result of the light beam detection unit provided on the scanning end side, scanning characteristics required of the light beam are evaluated.

Description

[0001] The present application is a divisional application of 98117250.4. Technical field [0002] The present invention relates to an evaluation device for image forming apparatuses such as laser printers and copiers. More specifically, the present invention relates to a light beam irradiated by a writing unit of an image forming apparatus to a latent image carrier such as a photosensitive drum and a photosensitive belt. A method for evaluating required characteristics, a beam characteristic evaluation device for performing such beam characteristic evaluation, and an adjustment device for a writing unit for adjustment using this evaluation method. Background technique [0003] As we all know, the original laser printers, copiers, facsimiles and other image forming apparatuses usually use the light beam emitted by the writing unit to follow the main line on the surface of the photosensitive drum as the latent image carrier provided at the imaging unit. Scanning in the scanning dir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/04G03G15/00G01J1/02G02B26/10G02B26/12H04N1/113
Inventor 尾崎绅一阿部克志高桥伸公
Owner RICOH KK