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Composite achromatic prism phase detecting and assembling method

An assembly method and phase detection technology, which is applied in the field of photoelectric tracking, can solve the problems that it is difficult to achieve second-level detection accuracy, cannot meet the high-precision requirements of achromatic prisms, and cannot achieve accuracy, etc.

Active Publication Date: 2015-10-07
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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Problems solved by technology

When the aperture and the vertex angle of the prism are both small, the change of the prism vector height caused by the phase error of the achromatic prism is 5-40" is less than 0.2 microns, especially when the prism aperture is on the order of 10-30mm, the change of the prism vector height The amount is even less than 0.05 microns, while the accuracy of the three-coordinate measuring instrument is generally about 0.5 microns, which cannot reach the required accuracy
In addition, the deflection range of the prism is usually within the range of ±10° to 80°, and it is difficult to achieve second-level detection accuracy in such a large range with a detection device with a large field of view
Therefore, the high precision requirements of achromatic prisms cannot be met by traditional measurement methods

Method used

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  • Composite achromatic prism phase detecting and assembling method
  • Composite achromatic prism phase detecting and assembling method
  • Composite achromatic prism phase detecting and assembling method

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Embodiment Construction

[0024] In order to make the purpose and technical solution of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0025] combine first figure 2 The achromatic prism phase detection method is introduced. This method requires the use of turntable (1), light source (2), achromatic prism group (3), platform (4), optical axis detection I (5), optical axis detection II (6) and optical axis detection III (7) , wherein the achromatic prism group (3) includes prism I and prism II.

[0026] Optical axis detection 5, 6 and 7 have longer focal length and high resolution, but the field of view is smaller, usually about 0.2-0.4°, focal length is about 2-3m, resolution is about 0.1-1.0″, the field of view of optical axis detection Far smaller than the light deflection angle of the prism (about 10-70°), the detection of the prism group cannot be completed b...

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Abstract

The invention provides a composite achromatic prism phase detecting and assembling method for solving a problem of achromatic prism 180-degree phase error detection and assembly. The method requires components including a rotating table, a light source, an achromatic prism group, a platform, and an optical axis detecting device. The light source installed on the high-precision rotating table is used for calibrating and adjusting the optical axis detecting device and splices the optical axis detecting device to form a detecting assembly with a large visual field and high resolution, thereby achieving detection and assembly of the achromatic prism group.

Description

technical field [0001] The invention belongs to the field of photoelectric tracking and relates to an optical detection and assembly method, in particular to a phase detection and assembly between composite achromatic prisms. Background technique [0002] The achromatic rotating prism tracking device mainly includes a motor, a code wheel and an achromatic prism group. The rotating prism tracking device is not only suitable for scanning the laser beam, but also can be used for fast target tracking. The rotating prism tracking device achieves the purpose of controlling the beam deflection by rotating two coaxial wedge-shaped prisms. It has the characteristics of compact structure, low moment of inertia and rapid response. Due to the dispersion characteristics of a single prism, when the rotating prism is used for target tracking, it is necessary to combine two prisms with a phase difference of 180° and different dispersion characteristics to eliminate the chromatic aberration...

Claims

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Application Information

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IPC IPC(8): G05D3/12G01M11/02
Inventor 彭起王中科姜洋陈科任戈刘顺发
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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