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Diagnostic method of optical device loaded on image reading device and image forming device

A technology of optical devices and diagnostic methods, which is applied in the fields of optics, image communication, and electrical recording, and can solve problems such as increased detection positions, many detection marks, and prolonged detection time

Inactive Publication Date: 2003-10-01
TOSHIBA TEC KK +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its disadvantage is that there are many detection marks placed on the chart, and the detection positions also increase, so the detection time will be extended
[0006] In addition, the conventional chart is only applicable to the adjustment of the optical device of the scanner unit, and cannot be used for the adjustment of the entire image forming apparatus including the scanner unit and the printer unit.

Method used

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  • Diagnostic method of optical device loaded on image reading device and image forming device
  • Diagnostic method of optical device loaded on image reading device and image forming device
  • Diagnostic method of optical device loaded on image reading device and image forming device

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Embodiment Construction

[0026] Next, an embodiment of a diagnostic method for an optical device according to the present invention will be described with reference to the drawings.

[0027] FIG. 1 schematically shows a cross section of a digital copying apparatus as an example of an image forming apparatus and a control system for controlling the copying apparatus. FIG. 2 is an enlarged view of a scanner unit of the copying device shown in FIG. 1 .

[0028] As shown in FIG. 1 , the digital copying device has a scanner unit 4 as an image reading device and a printer unit 6 as an image forming device.

[0029] As shown in FIGS. 1 and 2 , the scanner unit 4 has a document table 11 made of transparent glass on which a document D is placed, provided on the upper surface of the apparatus main body. The first carriage CR1 is disposed below the document table 11 . The first carriage CR1 has an exposure lamp 12 for illuminating the document D placed on the document table 11, a reflector 13 for reflecting th...

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PUM

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Abstract

The method for diagnosing an optical device detects the read scan line and the adjustment mark (212) based on the output characteristics of the output level of each pixel position obtained by reading one scan line corresponding to an adjustment mark (212) provided at a designated position. The position of the intersection point (213a, 213b, 213c) of each line segment (212a, 212b, 212c) of the marker (212) and the output level of the intersection point. These values ​​are compared with specified values ​​to detect deviations due to the mounting position of the optical device.

Description

technical field [0001] The present invention relates to a method for diagnosing an optical device, and particularly to a method for diagnosing an optical device mounted on a scanner unit or a printer unit of a digital copying device or the like. technical background [0002] An image forming apparatus such as a digital copier includes a scanner unit that optically reads a document image to generate image data, and a printer unit that forms an image on copy paper based on the image data. These scanner units and printer units have a plurality of optical devices including optical systems. These optical devices are manually adjusted by skilled artisans during the manufacturing process of the image forming device. Therefore, it takes a long time to adjust the optical device, and the adjustment accuracy is also unstable. [0003] Therefore, in order to shorten the adjustment time and stabilize the adjustment accuracy, a technique for automating the adjustment by digitizing the a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N1/00
CPCH04N1/00002H04N1/00013H04N1/00029H04N1/00045H04N1/00053H04N1/00063H04N1/00082H04N1/00408
Inventor 上诹访吉克
Owner TOSHIBA TEC KK