Off-axis parabolic mirror key parameter calibration system and method

Abstract

The invention relates to an off-axis parabolic mirror key parameter calibration system and method. The system comprises a first optical path, a second optical path, a third optical path, a fourth optical path and a fifth optical path. The first optical path comprises a laser interferometer, a plane mirror, a reference cross target and an off-axis parabolic mirror. A convergence beam focus sent by the laser interferometer and the focus of the off-axis parabolic mirror completely overlap. A beam emitted by the laser interferometer is reflected by the off-axis parabolic mirror, perpendicularly comes into the plane mirror, and returns along the original way. The reference cross target is placed at the intersection of the convergence beam focus of the laser interferometer and the original optical axis of the off-axis parabolic mirror. The reference cross target and the laser interferometer are in cat eye. The technical problem of low key parameter measurement accuracy of the off-axis parabolic mirror is solved. According to the invention, all processes use optical non-contact direct measurement; the accuracy is high; a mirror is prevented from being scratched; and an accurate basis is provided for later precise adjustment of an off-axis optical system.

Description

technical field [0001] The invention belongs to the field of optical assembly and detection, and in particular relates to a method and system for calibrating key parameters of an off-axis parabolic mirror. Background technique [0002] The off-axis parabolic mirror is a widely used optical element, mainly because it can generate parallel beams without central obscuration in a simple form. Its disadvantage is that it is very difficult to install and adjust. It is not a rotationally symmetrical surface, which is equivalent to intercepting a part of the rotationally symmetrical surface, so there is only a virtual optical axis of rotation, which makes the conventional coaxial through-the-center method unable to achieve common off-axis optical systems. The adjustment of the optical axis cannot guarantee the adjustment accuracy of the off-axis system, let alone the imaging quality of the off-axis system. The core problem of off-axis optical system adjustment is the determination ...

AI Technical Summary

Problems solved by technology

[0014] In order to solve the technical problems of the off-axis parabolic mirror key parameters in the prior art, namely the off-axis amount and off-axis angle measurement accuracy are low, and the off-axis parabolic mirror is easy to be scratched, the present invention provides a method for effectively realizing the calibration of key parameters of the off-axis parabolic mirror system and method

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