Device and method for measuring off-axis amount of off-axis paraboloidal mirror

An off-axis paraboloid and measuring device technology, applied in the direction of measuring devices, optical devices, instruments, etc., to achieve easy operation, solve measurement problems, and simple principles

Inactive Publication Date: 2015-07-08
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

[0002] With the application requirements of space optical remote sensing technology, the traditional coaxial optical system can no longer meet the demand, and the off-axis optical system has begun to be widely used

Method used

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  • Device and method for measuring off-axis amount of off-axis paraboloidal mirror
  • Device and method for measuring off-axis amount of off-axis paraboloidal mirror
  • Device and method for measuring off-axis amount of off-axis paraboloidal mirror

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Embodiment Construction

[0017] The detection optical path of off-axis paraboloid is as follows figure 1 As shown, the interferometer emits a converging beam, the beam converging point coincides with the focus of the parabola, the beam is reflected by the off-axis parabola, enters the self-collimating plane mirror, and returns to the interferometer through the original path of the self-collimating plane mirror.

[0018] The off-axis amount is defined as the distance from the center of the clear aperture of the off-axis parabolic surface to the optical axis of the parabolic mother mirror.

[0019] Off-axis paraboloid off-axis measurement method of the present invention comprises the following steps:

[0020] 1 Build an off-axis parabolic detection optical path. The test optical path includes converging light interferometers, self-collimating plane mirrors and other detection equipment. The detection optical path is as follows: figure 1 As shown, the beam converging point coincides with the focus of th...

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Abstract

The invention discloses a device and method for measuring the off-axis amount of an off-axis paraboloidal mirror. The device comprises a converging light interferometer, a parallel light interferometer and a self-collimating plane mirror. Based on the light rectilinear propagation theory, a clear aperture geometric center and focal point of the off-axis paraboloidal mirror are projected to the self-collimating plane mirror and marked respectively, and the off-axis amount of the off-axis paraboloidal mirror is measured by measuring the marking distance. The device has the advantages of being simple in theory and easy to operate and solving the problem of measuring the off-axis amount of the off-axis paraboloidal mirror.

Description

technical field [0001] The invention belongs to the processing and detection technology of optical elements, and specifically refers to a measuring device and method for the off-axis quantity of an off-axis parabola, which is used for the inspection before the mirror coating of the off-axis parabola in the mirror processing process. technical background [0002] With the application requirements of space optical remote sensing technology, the traditional coaxial optical system can no longer meet the demand, and the off-axis optical system has begun to be widely used. Subsequently, the processing and inspection of off-axis optical components is a necessary step in the development of off-axis optical systems. The off-axis amount is a unique geometric parameter of off-axis optical components, which is different from other geometric parameters of traditional coaxial optical components. . The invention discloses a method for detecting the off-axis amount of an off-axis parabolic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/14
Inventor 于清华孙胜利
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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