Device for detecting wide distance light beam parallelism

A parallelism detection and distance technology, used in measuring devices, optical devices, instruments, etc., can solve the problems of complex manufacturing process, complex process, small clear aperture, etc., and achieve reduced processing accuracy requirements, simple manufacturing process, The effect of increasing the range of use

Inactive Publication Date: 2009-04-15
CHANGCHUN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(References: Multispectral Optical System Optical Parallelism Adjustment and Inspection Method Detection, Fu Yuegang, Wang Zhijian, Li Bo, Journal of Changchun Institute of Optics and Fine Mechanics, December 2001, Volume 24, Issue 4) Prior Art There are the following disadvantages: 1. For actual measurement, the distance between the two parallel beams is very wide, but the light aperture is not large. It is a waste to use a large-aperture collimator for detection; 2. When the two parallel beams to be measured are opposite When the aperture is large, the large-aperture collimator cannot meet this test requirement; 3. The aperture of the self-collimating collimator must be greater than the distance between the two parallel beams to be detected, which causes the aperture of the collimator to vary with the The distance of the detection beam changes, which increases the manufacturing cost of the collimator, and is proportional to the third power or even the fourth power of the aperture increase
When it is increased to about 500mm, it is difficult to process, the cost is very expensive, the manufacturing process is complicated, and the cycle is long; 4. The existing detection equipment needs to use other benchmarks to derive measurement for the long-distance benchmark, and the process is complicated

Method used

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  • Device for detecting wide distance light beam parallelism
  • Device for detecting wide distance light beam parallelism
  • Device for detecting wide distance light beam parallelism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as figure 1 As shown, the collimator collimating device provided by the present invention is composed of 1 and a collimating arm 2, and the expanding arm 2 is located in front of the self-collimating collimator 1, and can wrap around the collimating tube 1 turn;

[0035] Described self-collimation collimator 1 adopts traditional Newtonian structure, is made up of point light source 21, parabolic main reflector 23, plane reflector 24 and beam splitting system 17; Described beam splitting system 17 is made up of beam splitting prism 18, The reflector 19 and the secondary reflector 20 are composed, wherein the reflector 19 is coated with a zinc sulfide film layer; all the above components are placed in the self-collimating collimator housing;

[0036] The light emitted by point 21 becomes parallel beam 10 through reflector 19, secondary reflector 20, plane reflector 24, and then through parabolic primary reflector 23; Prism 15 "; The point light source 21 provides v...

Embodiment 2

[0050] In addition to Embodiment 1, the present invention can also have the following forms.

[0051] Such as Figure 4 As shown, the wide-distance beam parallelism detection device is composed of a small-diameter collimator 25 and a diameter-expanding arm 2;

[0052] Described small aperture collimator 25 is made of telephoto objective lens 26 and the reticle 27 that is arranged on the objective lens focal plane; figure 1 The enlarged diameter arm 2 shown has the same structure; only the enlarged diameter arm 2 is sleeved on the small-diameter collimator 25 , fixed by fasteners, and locked on the collimator 25 .

[0053] combine Figure 5 Further explain the self-test process of the system.

[0054] The parallel light 28 emitted by the collimator 25 is completely received by the compound pentaprism 15, and is divided into two paths, that is, the light beam 29 and the light beam 30; , imaging at the focal plane, by adjusting the compound pentaprism 15 so that the imaged cr...

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Abstract

The invention relates to a wide distance beam parallelism detecting apparatus, comprising a photoelectric auto-collimator and a diameter-expanding collimating arm. The apparatus can detect the parallelism of the wide distance parallel beams and the detecting distance can reach 1.5m; and two parallel beams do not need to be contained into the caliber of the photoelectric auto-collimator so as to reduce the caliber of the photoelectric auto-collimator and largely reduce the manufacturing cost of the photoelectric auto-collimator. Simultaneously, the adoption of pentaprism and optical wedge largely reduces the processing precision requirement of the pentaprism and has no impact on the detecting precision of the whole apparatus and higher precision can be provided. The use of an optical splitting system in the photoelectric auto-collimator leads the detecting wave band of the apparatus to be expanded to the laser and infrared spectrum band from the white spectrum band so as to become a multi-spectrum optical system.

Description

technical field [0001] The invention is a wide-distance light beam parallelism detection device, which belongs to the technical field of optical axis parallelism detection. Background technique [0002] For the detection of the parallelism of wide-distance beams, so far, a large-aperture collimator is generally used, and the two parallel lights to be detected are included in the aperture of the collimator. Position, to judge the parallel accuracy of the two parallel lights. (References: Multispectral Optical System Optical Parallelism Adjustment and Inspection Method Detection, Fu Yuegang, Wang Zhijian, Li Bo, Journal of Changchun Institute of Optics and Fine Mechanics, December 2001, Volume 24, Issue 4) Prior Art There are the following disadvantages: 1. For actual measurement, the distance between the two parallel beams is very wide, but the light aperture is not large. It is a waste to use a large-aperture collimator for detection; 2. When the two parallel beams to be me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/26
Inventor 张磊付跃刚郑建平张露刘智颖胡源
Owner CHANGCHUN UNIV OF SCI & TECH
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