Infrared and Laser Engineering, Volume. 51, Issue 1, 20210953(2022)

Optical testing of the super-large plane mirror (Invited)

Xiaokun Wang... Erhui Qi*, Haixiang Hu, Hang Su, Lingzhong Li, Jing Wang, Xiao Luo and Xuejun Zhang |Show fewer author(s)
Author Affiliations
  • Key Laboratory of Optical System Advanced Manufacturing Technology, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
  • show less

    On the basis of summing up the difficulties of testing large flat mirror, for the sake of testing super-large surface especially for the tertiary mirror of Thirty Meter Telescope (TMT-M3) with precise method, a new technology syncretized pentaprism scanning method and Subaperture Stitching Interferometry (SSI) was proposed. The large mirror was tested by pentaprism scanning and SSI successively, the basic principle of the metrology was introduced and researched, and a reasonable optical testing project of TMT-M3 with the aperture of 3.5 m×2.5 m was made, the flow chart, pentaprism design, aberration fitting of pentaprism scanning, and the optimum stitching algorithm were analyzed particularly. And a prototype of TMT-M3 was developed for experimental verification. The Root Mean Square (RMS) and slope Root Mean Square (slopeRMS) values are 28.676 nm and 0.97 μrad, respectively.

    Tools

    Get Citation

    Copy Citation Text

    Xiaokun Wang, Erhui Qi, Haixiang Hu, Hang Su, Lingzhong Li, Jing Wang, Xiao Luo, Xuejun Zhang. Optical testing of the super-large plane mirror (Invited)[J]. Infrared and Laser Engineering, 2022, 51(1): 20210953

    Download Citation

    EndNote(RIS)BibTexPlain Text
    Save article for my favorites
    Paper Information

    Category: Photoelectric measurement

    Received: Dec. 10, 2021

    Accepted: --

    Published Online: Mar. 8, 2022

    The Author Email:

    DOI:10.3788/IRLA20210953

    Topics