Unlock instant, AI-driven research and patent intelligence for your innovation.

Optical scanning device and image forming device

An optical scanning device and a technology for scanning surfaces, which are applied in the electrical recording process using charge patterns, equipment and optics, etc. Effect

Inactive Publication Date: 2016-08-31
RICOH KK
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the multi-beam writing optical system disclosed in Patent Document 1, if the number of beams is greater than 2, the beam spacing in the sub-scanning direction on the surface to be scanned may vary greatly as the ambient temperature changes.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Optical scanning device and image forming device
  • Optical scanning device and image forming device
  • Optical scanning device and image forming device

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0229] Modification 1 is characterized in that a light source having two light emitting parts (ch1, ch2) is used instead of the above-mentioned light source, and corresponds to 600dp i. The light emitting section ch1 and the light emitting section ch2 are provided separately in the sub-scanning corresponding direction. At this time, in terms of design, the interval in the sub-scanning direction between the light spot irradiated by the light emitted by the light emitting part ch1 and the light spot irradiated by the light emitted by the light emitting part ch2 (hereinafter referred to as "c h1-ch2 interval") ) is 42.3 μm. The design ambient temperature is 25°C.

[0230] Figure 27A The incident position of the light emitted by the light emitting unit ch1 and the incident position of the light emitted by the light emitting unit ch2 within the effective scanning area of ​​the incident surface of the second scanning lens 2107a are displayed. The trajectory of the incident posit...

example 2

[0255] Modification 1 is characterized in that a light source having four light emitting parts (c h1 to ch4 ) is used instead of the above-mentioned light source, and corresponds to 1200 dp i. The light emitting section ch1 and the light emitting section ch4 among the four light emitting sections are provided at both ends of the sub-scanning corresponding direction. At this time, the interval in the sub-scanning direction between the light spot irradiated by the light emitted by the light emitting unit ch1 and the light spot irradiated by the light emitted by the light emitting unit ch4 (hereinafter referred to as “c h1-ch4 interval”) is designed to be 63.6 μm. The design ambient temperature is 25°C.

[0256] Figure 33A The incident position of the light emitted by the light emitting part ch1 and the incident position of the light emitted by the light emitting part ch4 within the effective scanning area of ​​the incident surface of the second scanning lens 2107 a are display...

Deformed example 3

[0281] Modification 3 is characterized in that a light source having eight light emitting parts (ch1 to ch8) is used instead of the above-mentioned light source, and corresponds to 1200 dp i. The light emitting section ch1 and the light emitting section ch8 among the eight light emitting sections are provided at both ends of the sub-scanning corresponding direction. At this time, the interval in the sub-scanning direction between the light spot irradiated by the light emitted by the light emitting unit ch1 and the light spot irradiated by the light emitted by the light emitting unit ch8 (hereinafter referred to as “c h1-ch8 interval”) is designed to be 148.4 μm. The design ambient temperature is 25°C.

[0282] Figure 39A The incident position of the light emitted by the light emitting part ch1 and the incident position of the light emitted by the light emitting part ch8 within the effective scanning area of ​​the incident surface of the second scanning lens 2107 a are displa...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention relates to an optical scanning device and an image forming device, and aims at reducing the light beam interval error in the sub-scanning direction on the scanned surface. The scanning optical system in the optical scanning device of the present invention includes first and second scanning lenses formed of resin, wherein the output surface of the second scanning lens has the largest refraction power in the sub-scanning direction. The second scanning lens is arranged so that the positions where the light beams emitted from the plurality of light emitting parts pass through the second scanning lens are close to each other in the direction corresponding to the sub-scanning, and are located at the height of 0 mm of the image directed to the photosensitive drum in the main and sub-orthogonal directions. Between the conjugate point of the aperture on the ray and the conjugate point of the aperture on the ray with an image height of 164 mm incident on the photosensitive drum.

Description

technical field [0001] The present invention relates to an optical scanning device and an image forming device, and more particularly, to an optical scanning device that scans a surface to be scanned with a plurality of beams of light, and an image forming device including the optical scanning device. Background technique [0002] Image forming devices using laser light are widely used in electrophotographic image recording. The image forming apparatus is equipped with an optical scanning device, and generally adopts a rotating mirror scanner (such as a polygon mirror) to scan the surface of a photosensitive photosensitive drum with laser light to form a latent image on the photosensitive drum. In the field of electrophotography of this type, it is required not only to improve the image quality of the image forming apparatus by increasing the image density but also to improve the operability of the image forming apparatus by increasing the image output speed. In this regard...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G02B26/12G03G15/00
CPCG02B26/123G02B26/125G03G15/04045G03G15/0435G02B26/10G03G15/04
Inventor 市井大辅
Owner RICOH KK