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Light ray parallel adjusting device and method

A light and laser technology, applied in the field of high-precision adjustment of parallelism between light rays, can solve the problems of expensive pentagonal prisms and difficulty in parallelism, and achieve low cost, high adjustment accuracy, and simple adjustment devices and methods.

Inactive Publication Date: 2008-08-06
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

Although two pentagonal prisms can produce parallel rays of light, since the pentagonal prism can only guarantee the verticality in one direction, it is difficult to obtain the parallelism of the two beams of light below 1 arc second, and the cost of high-precision pentagonal prisms is also expensive.

Method used

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  • Light ray parallel adjusting device and method
  • Light ray parallel adjusting device and method

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Embodiment Construction

[0031] Further illustrate the present invention below in conjunction with accompanying drawing.

[0032] Figure 1 shows the principle device for adjusting two beams of parallel light. The collimated laser 1 emits stable laser light and splits it through the polarization beam splitter 2, which is divided into vertical linear polarization S and parallel linear polarization P lasers. Block the transmitted light P of the polarization beam splitter with a cardboard, so that the vertical linearly polarized laser S passes through a λ / 4 wave plate 3, becomes circularly polarized light, and is incident on a plane mirror 9, wherein the λ / 4 wave plate 3 The fast axis is at 45° to the S polarization direction. Adjust the plane reflector 9 so that the circularly polarized light returns in reverse and passes through the λ / 4 wave plate 3 for the second time. At this time, the light changes from circularly polarized light to linearly polarized light, but the polarization direction is rotated...

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Abstract

The invention relates to a device for adjusting light rays in parallel and a method thereof and belongs to the photoelectric detection technical field. The invention uses a collimation laser (1) with high stability to emit collimation laser lights and splits the laser lights through a polarization light splitter (2); a lambda / 4 wave plate is respectively placed on a reflected light circuit and a transmitted light circuit of the polarization light splitter (2); the fast axle direction of the wave plate and the polarization direction of the laser lights become 45 degrees. Through the same planar reflector (9), rays are reflected inversely; the rays which need to be adjusted enter to the same angle measuring detector (8) successively; through adjusting a two-dimensional reflector (6), the parallelism of two emergent rays reaches below 1 arcsecond. The method can also adjust the parallelism of a plurality of light beams and is simple in structure, flexible in use, strong in universality, low in cost, high in adjusting precision and convenient to calibrate.

Description

technical field [0001] The invention belongs to the technical field of photoelectric detection, in particular to a high-precision adjustment of parallelism between light rays. The adjusted parallel light beam can be used to measure the parallelism of two linear guide rails, and also to measure the roll angle of the linear guide rail pair itself. Background technique [0002] The linear guideway pair of CNC machine tools needs to measure the roll angle, and the simplest optical measurement method is to use parallel light to measure. Although two pentagonal prisms can make the light parallel to each other, since the pentagonal prism can only guarantee the verticality in one direction, it is difficult to obtain the parallelism of the two beams of light below 1 arc second, and the high-precision pentagonal prism is also expensive. [0003] The object of the present invention is to provide a universal laser parallelism adjustment device and method, and the adjustment accuracy is...

Claims

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Application Information

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IPC IPC(8): G02B27/09G02B17/06G01B11/26
Inventor 匡翠方李艳秋刘丽辉
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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