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Liquid crystal back lighting optical target

A technology of backlighting and liquid crystal, applied in optics, optical components, optical devices, etc., can solve the problems of measuring instrument precision limitation, affecting instrument performance and application range, etc., and achieve the elimination of measurement random error, geometric error reduction, The effect of small measurement random errors

Inactive Publication Date: 2003-10-22
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a long time, due to the lack of optical targets with uniform and stable illumination, the accuracy of measuring instruments in related technical fields such as optical measurement and visual measurement has been restricted and limited to varying degrees, thus affecting the performance and application range of the above instruments

Method used

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  • Liquid crystal back lighting optical target
  • Liquid crystal back lighting optical target
  • Liquid crystal back lighting optical target

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Experimental program
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Effect test

Embodiment Construction

[0015] Below in conjunction with accompanying drawing, the implementation of the present invention is described in detail as follows:

[0016] exist figure 1 Among them, the base 1 can adopt plank, plastics or other materials to make a square frame (or other shapes) box-shaped body, and the middle part of the panel of the box-shaped box body is shaped on a square frame hole; the front inner wall of the square frame hole is fixed by a fastening screw device. Optical target 4. The optical target 4 can be made of glass, and its surface adopts an optical engraving process, and features of spatial geometry (such as circles, triangles or rectangles, etc.) are engraved on the flat optical glass. The array of the engraved optical shape patterns can form light-transmitting and opaque array patterns. Usually, the manufacturing accuracy (including shape and position accuracy) of the optical target 4 should be on the order of microns or submillimeters, and the specific accuracy can be d...

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Abstract

The invention discloses a liquid crystal backlighting optical target, composed of the pedestal, the liquid crystal backlighting board and the optical target. The pedestal is box-body shaped, and the front panel of the box body is set with the optical target whose surface is set with geometrical pattern. The backlighting board is set in the box body and the condensation cathode fluorescent tube isset on the external edge of the backlighting board. The backlighting board and ground glass pieces can be set on the adjusting guide way in the box body, which can remarkably adjust the optical output property and quality of the optical target. Because of adopting 4-tube liquid crystal backlight board and of simulating ideal surface light source by plate light source, the heat productivity is by far the less than the traditional filament lamp and halogen lamp.

Description

technical field [0001] The invention belongs to the category of measuring devices, in particular to optical measuring devices. Background technique [0002] High-precision optical targets are indispensable calibration instruments in technical fields such as optical measurement, visual measurement, and robot vision. Calibrate the inherent parameters of new instruments or calibrate existing instruments by detecting known geometric quantities on optical targets. The detection accuracy of the optical target will be directly related to the error transmission of the measuring instrument and the measurement accuracy of the instrument, so it is the core device of the measuring instrument. [0003] The detection accuracy of an optical target is not only related to the physical accuracy of the target itself, but also affected by the intensity of optical illumination. Practice has shown that under the existing optical manufacturing process conditions (p...

Claims

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Application Information

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IPC IPC(8): G01B11/00G02B27/62
Inventor 寇欣宇王仲段发阶
Owner TIANJIN UNIV
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