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Cylinder rotating mirror apparatus used for laser scanner

A laser scanner and cylinder technology, applied in optics, instruments, mirrors, etc., can solve problems such as unevenness, weak sides, image distortion on the screen, etc., and achieve uniform light intensity distribution, reduce difficulty, and uniform scanning speed.

Inactive Publication Date: 2008-09-24
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The laser scanner scanning method of the rotating mirror-galvanometer system has inherent geometric distortion of the scanning field of the plane mirror, which causes the spot on the galvanometer, that is, the non-linearity and non-time symmetry of the moving speed in the upward scanning direction of the plane screen, resulting in the image on the screen Distortion, light intensity distribution on the screen is strong in the middle, weak on both sides and uneven, etc.

Method used

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  • Cylinder rotating mirror apparatus used for laser scanner
  • Cylinder rotating mirror apparatus used for laser scanner
  • Cylinder rotating mirror apparatus used for laser scanner

Examples

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Embodiment Construction

[0022] In conjunction with the accompanying drawings, the specific description is as follows:

[0023] Such as figure 1 As shown, the principle of the optical path is described as follows: the laser beam i is incident on the gear-shaped cylindrical mirror M at a certain angle, and the reflected beam r points to another specific direction. When the gear-shaped cylindrical mirror rotates, due to the special curved surface shape, when the cylindrical surface moves against the incident light (or moves in the opposite direction), the slope of the tangent line at the incident point of the laser changes linearly and monotonously during the rotation of the entire mirror surface. The reflected light beam is then reflected by the galvanometer to reach the distant screen P at a constant speed (moving an equal distance per unit time). Such a scanning method can finally enable the reflected light beam to realize uniform scanning in one direction, which greatly reduces the difficulty of si...

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Abstract

This invention relates to one laser scan column rotation lens, which is column reflection lens gear structures with central rotation axis connected to micro motor, wherein, it uses gear shape to take place multiple-plane shape and uses special column reflection lens rotation to take place of rotation lens and vibration lens system plane refection lens to realize laser beam single even speed moving. This invention can be applied in laser television and online test and other scanner for even speed scanning.

Description

technical field [0001] The invention relates to a cylindrical rotating mirror device for a laser scanner, which uses a simple design scheme to realize unidirectional and uniform scanning of the light spot, and can be widely used in various laser scanner fields such as laser TV, laser online inspection and barcode recognition. application. Background technique [0002] Due to the characteristics of wide color gamut, high color saturation, flexible and variable screen size, easy to control, and no electromagnetic radiation, laser TV can be widely used in large-scale open-air image display, teaching demonstration, rear projection display equipment and other fields. Laser TV occupies a special position in the display field. Many countries in the world have plans to carry out research on laser TV, and great progress has been made. The scanning system produced by German Laser Display Technology Co., Ltd. writes images by fast scanning line by line in the entire display area, whic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B26/10G02B27/00G02B5/10
Inventor 范志新
Owner HEBEI UNIV OF TECH
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