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Method and device for calibrating optical axis of large-aperture off-axis reflective vacuum collimator

A collimator and off-axis reflection technology, which is applied in the direction of measuring devices, optical instrument testing, and optical performance testing, can solve the problems of low calibration accuracy and heavy workload, and achieve simple debugging, simplified workload, and simple operation quick effect

Active Publication Date: 2020-07-31
CHANGGUANG SATELLITE TECH CO LTD
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Problems solved by technology

[0006] In order to solve the problems of low calibration accuracy and heavy workload in the previous calibration method and device of the existing large-diameter off-axis reflective vacuum collimator, the present invention provides an accurate calibration method for the optical axis of the large-diameter off-axis reflective vacuum collimator and device

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  • Method and device for calibrating optical axis of large-aperture off-axis reflective vacuum collimator
  • Method and device for calibrating optical axis of large-aperture off-axis reflective vacuum collimator

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Embodiment Construction

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0022] The calibration method of the optical axis of a large-diameter off-axis reflective vacuum collimator is described in detail by taking a large-diameter off-axis reflective vacuum collimator with an aperture of 1.2 meters, a focal length of 35 meters, and an off-axis distance of 2.6 meters as an example. Light pipe, the collimator is placed on a large air-floating platform, and the collimator is connected with a large-scale high and low temperature, vacuum environment simulation test tank. The calibration method includes the following steps:

[0023] S1. An interferometer 3 and a large-diameter planar mirror 2 are arranged corresponding to the large-diameter off-axis reflective vacuum collimator.

[0024] The specific process is as follows: figure 1 Shown is a schematic diagram of self-collimation detection of a large-aperture off-axis r...

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Abstract

The invention relates to the technical field of collimator optical axis calibration, in particular to a large-aperture off-axis reflection type vacuum collimator optical axis calibration method and adevice, and solves the problems of low calibration precision and large machining workload. The method comprises the steps of using a collimator off-axis primary mirror as a reference mirror, and usinga large-diameter plane mirror and an interferometer for collimator debugging; removing the interferometer, a pentaprism I and a pentaprism II are arranged between the collimator off-axis main mirrorand the large-aperture plane mirror; and arranging a digital display auto-collimation goniometer corresponding to the pentaprism I and the pentaprism II, arranging a target plate of the collimator onthe focal plane of the collimator, and debugging the target plate based on the digital display auto-collimation goniometer, the pentaprism I and the pentaprism II until the debugging of the target plate is completed, thereby completing the calibration. According to the method, the collimator off-axis primary mirror is used as the reference mirror, the calibration precision makes a precision breakthrough compared with the prior art, the early-stage processing work is not needed, only the user site installation and adjustment are needed, and the operation is simple and rapid when the user site installation and adjustment are carried out.

Description

technical field [0001] The invention relates to the technical field of collimator optical axis calibration, in particular to a large-diameter off-axis reflective vacuum collimator optical axis calibration method and device. Background technique [0002] The large-aperture off-axis reflective vacuum collimator is one of the important test devices required for evaluating the imaging state of long-distance targets by high-resolution optical imaging systems in simulated aviation and aerospace environments. [0003] The optical remote sensing imaging system used in aviation and aerospace has a large aperture and a long focal length. Therefore, the matching optical test platform needs a large aperture and a long focal length; , reflective spectrum has a wide range of available, simple structure and stable focal length and other advantages and is widely used. [0004] But at the same time, due to the imaging characteristics of the off-axis reflective optical system, it requires hi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M11/02
CPCG01M11/0207G01M11/0271
Inventor 马冬梅王兴赵恩才
Owner CHANGGUANG SATELLITE TECH CO LTD
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