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Synchronous scanning rotary biprism device and one-dimensional scanning method thereof

A synchronous scanning, double prism technology, applied in measurement devices, optical devices, optics, etc., can solve the problems of large volume and weight, low reliability, complex calculation, etc., to achieve high accuracy and reliability, simple and convenient control, The effect of concise forward analytical solution and reverse analytical solution

Active Publication Date: 2020-05-08
武汉华中天经通视科技有限公司
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Problems solved by technology

[0006] Aiming at the disadvantages of high cost, large volume and weight, low reliability, and complex solution caused by the independent control of the two prisms in the existing electronically controlled rotating double prism, the present invention realizes the synchronization of the two prisms by adding a mechanical synchronization structure. Reverse constant amplitude rotation, can control the beam pointing to scan in one-dimensional direction

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  • Synchronous scanning rotary biprism device and one-dimensional scanning method thereof

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Embodiment Construction

[0031] The present invention will be further described in detail below in conjunction with the drawings.

[0032] Working principle of rotating double prism and calculation of beam pointing

[0033] The rotating double prism is composed of a pair of coaxially adjacently arranged refracting prisms. By adjusting the respective corners of the first wedge prism 2 and the second wedge prism 3, the spatial direction of the outgoing beam can be arbitrarily changed within a certain deflection angle range. figure 1 Describes the working principle of the rotating double prism beam pointing control.

[0034] Calculating the mathematical relationship between the spatial direction of the incident and outgoing beams and the rotation angles of the two prisms is the basic premise for the application of rotating double prisms. The mathematical relationship is divided into two levels: "forward problem" and "reverse problem". The forward problem is to solve the spatial direction of the outgoing beam g...

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Abstract

The invention discloses a one-dimensional synchronous scanning rotary biprism device and a one-dimensional scanning method. The synchronous scanning rotary biprism device realizes transmission and synchronization of two prisms by means of four symmetrically and uniformly distributed conical surface gears which are fixedly installed on a shaft system, and achieves the purpose of synchronous reverseequal-amplitude rotation. In a scanning mode, in order to eliminate the influence of backlash on the precision, the two prisms are controlled to continuously rotate only in one direction, an emergentlight beam scans back and forth in a one-dimensional direction, and the time characteristic of scanning is modulated by controlling the time characteristic of a prism rotation angle theta. The synchronous scanning rotary biprism device can realize driving and position feedback of the two wedge-shaped prisms only by means of one motor and one angle measurement sensor, reduces the number of motorsand angle measurement sensors, has only one voltage control quantity and one angle feedback quantity, has concise forward and reverse analytical solutions, and is simple and convenient in resolving and control.

Description

Technical field [0001] The invention belongs to the technical field of beam pointing scanning control, and specifically relates to a one-dimensional synchronous scanning and rotating double prism device and a one-dimensional scanning method thereof. Background technique [0002] At present, the control methods of beam scanning mainly include gimbal type, fast mirror type, and rotating double prism type. [0003] Among them, the rotating double prism adjusts the beam or the direction of the sight axis through the coaxial independent rotation of the two prisms. Compared with the traditional gimbal type, it has the advantages of high precision, compact structure and good dynamic performance. The rotating double prism beam pointing control system has been Become a useful supplement to the traditional gimbal. [0004] The rotating double prism beam pointing control system consists of a pair of coaxially adjacently arranged refracting prisms. The apex angle and material of the two prisms ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B26/10G01B11/26
CPCG02B26/108G01B11/26
Inventor 余永朝左小涛
Owner 武汉华中天经通视科技有限公司
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