A new off-axis Gregorian mechanical structure and its alignment method

Xing Fu; Yu Lei; MingQiang Cao; YaMei Yin

doi:10.1117/12.2617928

15 February 2022 A new off-axis Gregorian mechanical structure and its alignment method

Xing Fu, Yu Lei, MingQiang Cao, YaMei Yin

Proceedings Volume 12166, Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021); 1216676 (2022) https://doi.org/10.1117/12.2617928
Event: Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021), 2021, Hong Kong, Hong Kong

Abstract

As for the conventional off-axis telescope system structure, the primary and secondary mirror are mostly fixed. The alignment process lacks adjustment mechanism. In addition, the off-axis system has no rotational symmetry which increases the difficulty of alignment and makes the cycle longer. In order to solve the above problems, an off-axis telephoto system structure is designed. The primary mirror has a four degree-of-freedom adjustment mechanism can be fine-tuned manually. The secondary mirror is driven by 6-aixs motion hexapod electrically. At the same time, perturbation analysis is carried out for this optical system. The sensitivity matrix between misalignments of second mirror and aberration coefficients is obtained. Based on the matrix, adjustment strategy is proposed [1-9]. Finally, the effectiveness of the designed structure and adjustment strategy is verified by experiments.The detailed process is described below.

Citation Download Citation

Xing Fu, Yu Lei, MingQiang Cao, and YaMei Yin "A new off-axis Gregorian mechanical structure and its alignment method", Proc. SPIE 12166, Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021), 1216676 (15 February 2022); https://doi.org/10.1117/12.2617928

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available