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Precise rotation biprism optical beam scanner and control method thereof

A technology of beam scanning and control methods, which is applied to lasers, laser components, instruments, etc., and can solve problems such as accuracy and scanning range limitations

Inactive Publication Date: 2006-05-17
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the formula (1) is approximated when the apex angle of the prism is very small, its accuracy and scanning range are limited

Method used

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  • Precise rotation biprism optical beam scanner and control method thereof
  • Precise rotation biprism optical beam scanner and control method thereof
  • Precise rotation biprism optical beam scanner and control method thereof

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Embodiment Construction

[0066] see first image 3 , image 3 It is a structural block diagram of the precision rotating double prism beam scanner pair of the present invention. It can be seen from the figure that the precision rotating double prism beam scanner of the present invention includes a drive circuit 3, two motors 4, 5, a transmission mechanism 6, and a double circular prism 7. 8. The drive circuit 3 receives instructions and drives two motors 4 and 5 according to the instructions to rotate the double circular prisms 7 and 8 respectively through the transmission mechanism 6. It is characterized in that there are computer 1 and PID controller 2 before the drive circuit 3 , the computer 1 is provided with a dedicated database 9, and two angle sensors 10, 11 are also provided at the output end of the transmission mechanism 6, and the output ends of the two angle sensors 10, 11 are connected to the computer 1.

[0067] The control method of the precision rotating double prism beam scanner comp...

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Abstract

A precision rotating double prism beam scanner for spatial scanning of laser beams and its control method. The precision rotating double prism beam scanner includes a drive circuit, two motors, a transmission mechanism, and a double circular prism. It is characterized in that the drive circuit Before there was a computer and a PID controller, the computer had a dedicated database that stored the rotation angles of the double circular prisms (θ 1 , θ 2 ) and the corresponding values ​​of the pitch angle and azimuth angle (δ, Φ) of the transmitted beam, two angle sensors are arranged at the output end of the transmission mechanism corresponding to the double circular prism, and the output end is connected to a computer. The precision rotating double prism beam scanner and its control method of the present invention can make the elevation angle δ and azimuth angle Φ precision of the transmitted beam reach milliradian level, and expand the scanning range of the scanner.

Description

technical field [0001] The invention relates to the spatial scanning and capturing of laser beams, in particular to a precision rotating double prism beam scanner and its control method. Background technique [0002] Spatial scanning and capture of laser beams has always been one of the key development research directions of space optical communication and lidar technology. Space optical communication and laser radar must scan the effective detection space and capture the target with the laser beam, so as to achieve the purpose of accurately realizing communication and measuring the distance and orientation of the target. In order to achieve this purpose, the prior art [1] (referring to Optics Guide 5, Chapter 10, Page12.) and the prior art [2] (referring to patents such as Zu Jifeng, application number: 03129234.8, application date in June 2003) proposed To realize the two-dimensional scanning of the laser beam in a specific range by using the rotating double prism device....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B26/10G03F3/00H01S3/00
Inventor 云茂金祖继锋孙建锋阳庆国许楠刘立人
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI