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Single/double-frequency output laser head and laser output method

A dual-frequency laser and laser head technology, applied in the direction of lasers, laser components, phonon exciters, etc., can solve the problem that the measurement speed of a dual-frequency laser interferometer cannot exceed 1m/s, affect the length or displacement measurement accuracy, and frequency difference Limited and other problems, to meet the needs of multi-dimensional measurement applications, easy to use, simple structure

Inactive Publication Date: 2011-08-03
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limited frequency difference of the Zeeman dual-frequency laser, the measurement speed of the dual-frequency laser interferometer cannot exceed 1m / s
Although the single-frequency laser interferometer has the advantage of unlimited measurement speed, the frequency stabilization accuracy of the thermally stabilized He-Ne laser is poor, which affects the measurement accuracy of the final length or displacement
In addition, the single-frequency laser interferometer also has the fundamental weakness of being seriously affected by the environment

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  • Single/double-frequency output laser head and laser output method
  • Single/double-frequency output laser head and laser output method
  • Single/double-frequency output laser head and laser output method

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Embodiment Construction

[0013] Concrete structure, working principle of the present invention are described in detail below in conjunction with accompanying drawing:

[0014] Such as figure 1 , figure 2 As shown, the present invention includes a casing 1, in which a dual-frequency laser 2 and a precision translation stage 3 are arranged, and a half-wave plate 4 and a polarization beam splitter 5 are fixedly connected to the precision translation stage 3. The dual-frequency laser is used as the light source of the laser head. It is opposite to the light output end of the light source. There is a light output hole 6 on the casing 1; on the casing 1 perpendicular to the direction of the light output hole 6, another light output hole 7 is set opposite to the center of the polarization beam splitter prism 5. .

[0015] In the above-mentioned embodiment, the precision translation stage 3 can be a linear displacement worktable driven by a lead screw or a pull rod in the prior art. During operation, the p...

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Abstract

The invention relates to a single / double-frequency output laser head and a laser output method. The single / double-frequency output laser head is characterized by comprising a shell; the shell is internally provided with a double-frequency laser and a precise translation platform; a half-wave plate and a polarizing light-splitting prism are fixedly connected on the precise translation platform; the double-frequency laser is used as a light source of the laser head, and is opposite to a light-emergent end of the light source; the shell is provided with a first light-emergent hole which is opposite to the center of the polarizing light-splitting prism and is vertical to the first light-emergent hole; and the shell is provided with a second light-emergent hole. In the invention, the existing manufacturing process of the double-frequency laser is fully utilized, so that the invention not only can be used for occasions needing double-frequency laser light sources, but also can meet the application requirements of single-frequency laser light sources. The invention has the advantages that the structure is simple, the performance is stable and the use is convenient and the like, and can be widely applied in a laser interference technology.

Description

technical field [0001] The invention relates to a laser head and a laser output method, in particular to a single / double frequency output laser head and a laser output method. Background technique [0002] Laser is the core component of modern optical instruments. It has the advantages of high intensity, high directivity, spatial coherence, narrow bandwidth and high monochromaticity. Among them, single-frequency laser and dual-frequency laser have the highest practical value and are widely used in laser field of interferometry. [0003] Modern laser interferometers are mainly based on Michelson interferometers, and most of them use frequency-stabilized helium-neon lasers as light sources. With various accessories such as refractors and reflectors, they can measure displacement, speed, angle, straightness, and flatness. And verticality and other measurement work. According to the number of light frequencies emitted by the laser head used, laser interferometers are divided i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/10H01S3/101G01B9/02
Inventor 谌雅琴孙利群章恩耀
Owner TSINGHUA UNIV