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Method for improving pointing precision of achromatic rotating prism group

A technology of rotating prisms and pointing accuracy, which is applied in the direction of control using feedback, and can solve problems such as the influence of pointing accuracy and prism system error

Active Publication Date: 2016-02-24
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The rotating double prism structure in the prior art has dispersion phenomenon for light waves of different wavelengths, but the solution method for the achromatic rotating prism group does not involve
In addition, in the prior art, the precise parameters of the prism are required, but the actual parameters of the prism system inevitably have errors during processing, installation and measurement, which will have a direct impact on the pointing accuracy

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  • Method for improving pointing precision of achromatic rotating prism group
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Embodiment Construction

[0040] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0041] combine first figure 1 Introduce the composition of the rotating prism group. The main components of the achromatic rotating prism group are the first prism group 1, the second prism group 2, the first motor 3, the second motor 4, the first position sensor 5, the second position sensor 6, the detector 7, and the controller 8 . The first prism group 1 is composed of a first prism 101 and a second prism 102 . The second prism group 2 is composed of a third prism 201 and a fourth prism 202 .

[0042] Wherein, the first prism group 1 , the second prism group 2 , the first motor 3 , the second motor 4 and the detector 7 are coaxially installed. The first prism 101 and the third prism 201 have the same theoretical de...

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Abstract

The invention provides a method for improving the pointing precision of an achromatic rotating prism group. The achromatic rotating prism group comprises a first prism group (1), a second prism group (2), a first motor (3), a second motor (4), a first position sensor (5), a second position sensor (6), a detector (7) and a controller (8). The first prism group (1) is composed of a first prism (101) and a second prism (102). The second prism group (2) is composed of a third prism (201) and a fourth prism (202). The method comprises the steps that firstly, a mathematic model of the achromatic rotating prism group is established, and a precise resolving algorithm is provided to complete light beam high-precision pointing in theory; and secondly, prism group parameters are optimized through an optimization algorithm, the influences of machining, installation and measuring errors are reduced, and the practical pointing precision of the system is greatly improved.

Description

technical field [0001] The invention belongs to the field of photoelectric tracking and light beam control, and in particular relates to a method for improving the pointing accuracy of an achromatic rotating prism group. Background technique [0002] In the field of photoelectric tracking, a tracking device in the form of a gimbal is usually used. The detector is installed on a multi-axis gimbal, and the direction of the visual axis is controlled by controlling the rotation of the gimbal. sensitive. Another structure is the pendulum mirror structure, which is sensitive to mechanical errors and is generally used for small-aperture beam deflection. [0003] The rotating double prism structure (Risley prism) can achieve the purpose of controlling the beam deflection by rotating two coaxial wedge prisms. It has the characteristics of compact structure, low moment of inertia and rapid response. In the prior art (see the patents of Yun Maojin, Zu Jifeng, etc.: CN1256609C and pat...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D3/12
CPCG05D3/12
Inventor 李锦英彭起陈科付承毓杜升平曾翰
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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