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Coordinate mapping of the primary mirror vertex in a space telescope by using a CGH and theodolites
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Paper Abstract

Optical alignment of the mirror components in a space telescope is an important process for obtaining high optical resolution and performance of the camera system. The alignment of mirrors depends on the external coordinate frame using a cube mirror, and a relative coordinate mapping between the mirror and the cube mirror before optical system integration is a prerequisite step. Therefore, in order to align the spacecraft camera mirrors, the relative coordinates of the vertex of each mirror and the corresponding cube mirror must be accurately measured. This paper proposes a new method for finding the vertex position of a primary mirror by using an optical fiber and alignment segments of the computer-generated hologram (CGH). The measurement system is composed of an optical testing interferometer, a multimode optical fiber. We used 2 theodolites to measure the relative coordinates of the optical fiber located at the mirror vertex with respect to the cube mirror, and achieved a measurement precision of less than 25um.

Paper Details

Date Published: 21 June 2019
PDF: 6 pages
Proc. SPIE 11056, Optical Measurement Systems for Industrial Inspection XI, 1105642 (21 June 2019); doi: 10.1117/12.2525915
Show Author Affiliations
H. Kihm, Korea Research Institute of Standards and Science (Korea, Republic of)
Univ. of Science and Technology (Korea, Republic of)
H.-S. Yang, Korea Research Institute of Standards and Science (Korea, Republic of)
Univ. of Science and Technology (Korea, Republic of)
J.-W. Kang, Univ. of Science and Technology (Korea, Republic of)


Published in SPIE Proceedings Vol. 11056:
Optical Measurement Systems for Industrial Inspection XI
Peter Lehmann; Wolfgang Osten; Armando Albertazzi Gonçalves Jr., Editor(s)

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