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Laser exocoel feedback low-angle roll angle measuring system

A roll angle measurement, small angle technology, applied in the field of measurement, can solve the problems of non-linear principle, small measurement range, etc., and achieve the effect of simple and compact structure, high measurement accuracy

Active Publication Date: 2013-12-25
北京镭测科技有限公司
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Problems solved by technology

Laser interferometry is currently the most advanced measurement method, but it is nonlinear in principle and has a small measurement range, so it is mainly used for verification of other methods

Method used

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  • Laser exocoel feedback low-angle roll angle measuring system
  • Laser exocoel feedback low-angle roll angle measuring system
  • Laser exocoel feedback low-angle roll angle measuring system

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Embodiment Construction

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0032] figure 1 A schematic block diagram of a laser external cavity feedback small-angle roll angle measurement system according to the present invention is shown. like figure 1 As shown, the laser external cavity feedback small-angle roll angle measurement system includes:

[0033] LD pumping source 1 with a pigtail, the LD pumping source 1 is used to generate pumping light;

[0034] A collimating and focusing lens group 2, the collimating and focusin...

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Abstract

The invention discloses a laser exocoel feedback low-angle roll angle measuring system and belongs to the technical problem of laser measuring. In the roll angle measuring system, a laser feedback system composed of an LD pumped single-frequency microchip Nd: YAG laser, a stationary wave plate, a rotatable wave plate and an external reflector is adopted for measuring a roll angle. 45-degree angles are formed between the fast and slow shafts of the stationary wave plate and a laser polarization direction, the fast and slow shafts of the rotatable wave plate and the fast and slow shafts of the stationary wave plate are superposited at a zero point position. The rotatable wave plate is rotated within 45 degrees, and the phase differences among the feedback signals outputted by a laser are continuously variable and have one-to-one corresponding relations with angles, so that the roll angle can be precisely measured. The laser exocoel feedback low-angle roll angle measuring system has the advantages of simple and compact structure, easy assembling and adjusting, high measuring precision and low cost.

Description

technical field [0001] The invention relates to the measurement field, in particular to a laser external cavity feedback small-angle roll angle measurement system in the measurement field. Background technique [0002] Angle is an important unit of measurement, and it is also one of the important geometric parameters in machinery, instrumentation and electronic products. Its accuracy directly affects the quality and life of products. It is of great significance and role in many fields. [0003] The earliest research on angle measurement technology is mechanical and electromagnetic angle measurement technology, such as multi-tooth indexing table, induction synchro and circular magnetic grid. diameter is commonplace, and it is difficult and expensive to manufacture. The optical angle measurement method has attracted much attention due to its characteristics of non-contact, high precision and high sensitivity, especially the development of a stable laser light source makes in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/26
Inventor 宋明宇
Owner 北京镭测科技有限公司
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