Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Testing of the stochastic parallel radient descent algorithm for the alignment of a two-mirror telescope

Not Accessible

Your library or personal account may give you access

Abstract

The precise alignment of a high-performance, wide-field telescope is a key factor to ensure its imaging quality. The sharpness function of far-field images combined with an optimization algorithm is one of the most commonly used telescope alignment methods because of its advantages of having a concise measurement system, a simple calculation process, and wide application fields. In this paper, a Cassegrain telescope with two mirrors is aligned by maximizing the sharpness function of far-field images using the stochastic parallel gradient descent algorithm. To verify the effects of this method, both numerical simulations and experiments are implemented. The misalignments are corrected only after a few iterations, indicating that the stochastic parallel gradient descent algorithm can align the telescope rapidly. What’s more, wavefront errors are measured using a Shack–Hartmann wavefront sensor to confirm the accuracy. The results show that this method can align a telescope that is in a misaligned working state with large misalignment errors rapidly and accurately, and the image quality after correction is improved greatly.

© 2020 Optical Society of America

PDF Article
More Like This
Piston error correction of sparse aperture systems using the metaheuristic stochastic parallel gradient descent algorithm

Kaiyuan Yang, Zongliang Xie, Haotong Ma, Hongyi Hu, Bo Qi, Jianliang Shi, Qiang Wang, and Wenyi Lv
Appl. Opt. 59(22) 6505-6516 (2020)

Reconstruction of two interfering wavefronts using Zernike polynomials and stochastic parallel gradient descent algorithm

Roghayeh Yazdani, Hamid R. Fallah, and Morteza Hajimahmoodzadeh
Opt. Lett. 39(6) 1505-1508 (2014)

Computational adaptive holographic fluorescence microscopy based on the stochastic parallel gradient descent algorithm

Wenxue Zhang, Tianlong Man, Minghua Zhang, Lu Zhang, and Yuhong Wan
Biomed. Opt. Express 13(12) 6431-6442 (2022)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved