Alignment system and alignment method for detection and calibration of telescope primary mirror

Abstract

The invention discloses an alignment system for detecting and calibrating a main mirror of a telescope, comprising a main mirror, a computational holographic element, an interferometer, a Shaker-Hartmann calibration device, a switching mirror, a first switching driving device, and a switching mirror When cutting out, the interferometer is aligned with the primary mirror; when the switching mirror is switched in, the Shack-Hartmann calibration device is aligned with the primary mirror; respectively connected to the computational holographic element and the interferometer to adjust the first pose of the two poses Alignment device to align the interferometer, computational holographic element, and primary mirror; spherical mirror to assist Shaker-Hartmann calibration device in aligning the primary mirror after the interferometer is aligned with the primary mirror, for adjusting the spherical A second pose adjustment device for the mirror pose to align the spherical mirror with the interferometer; a third pose adjustment device for adjusting the pose of the Shaker-Hartmann calibration device to align the Shaker-Hartmann Alignment of the Terman calibration device with the spherical mirror; reduces the difficulty of aligning the Shaker-Hartmann calibration device with the primary mirror.

Description

technical field [0001] The invention relates to the technical field of optical detection, in particular to an alignment system for detection and calibration of a telescope primary mirror. In addition, the present invention also relates to an alignment method applied to the alignment system for detecting and calibrating the primary mirror of the telescope. Background technique [0002] In the field of optical inspection technology, interferometers and computational holographic elements (CGH) are usually used to inspect the surface shape of the primary mirror of the telescope to determine whether the surface shape of the primary mirror is qualified. [0003] With the increase of the telescope aperture, the support of the main mirror of the telescope has changed from a passive support to an active support. Therefore, in practical applications, in order to maintain a good surface shape of the mirror surface, it is necessary to use a force actuator to correct the surface shape. ...

AI Technical Summary

Problems solved by technology

[0007] However, when the primary mirror is calibrated without destroying the primary mirror detection system, the Shaker-Hartmann (S-H) system needs to be aligned after the primary mirror detection is completed, because the Shaker-Hartmann (S-H ) system is sensitive to the influence of position, its field of view is small, and the alignment area of ​​the computational hologram (CGH) cannot be detected, and the return light of the light source is weak after propagation and reflection. Therefore, the Shack-Hartmann (S-H) system Alignment with the primary mirror is very difficult

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