Cylindrical CGH wavefront calibration method based on transmission holography

Zhijun Ying; Xingyu Lin; Xuanyu Chai; Yingjie Yu

doi:10.1117/12.2670483

27 January 2023 Cylindrical CGH wavefront calibration method based on transmission holography

Zhijun Ying, Xingyu Lin, Xuanyu Chai, Yingjie Yu

Proceedings Volume 12550, International Conference on Optical and Photonic Engineering (icOPEN 2022); 1255026 (2023) https://doi.org/10.1117/12.2670483
Event: International Conference on Optical and Photonic Engineering (icOPEN 2022), 2022, ONLINE, China

Abstract

Computer-generated holograms (CGH) can generate the ideal wavefront required for any aspheric surface to be measured for phase compensation. It is usually used to create a cylindrical wavefront to replace the null compensator in cylindrical interferometry. Compared with the null compensator, the error components introduced by CGH are more complex, including substrate error, etching error, coding error, etc. The error calibration of the wavefront generated by the CGH can effectively improve the accuracy of the measurement results. Since CGH will generate multi-order diffraction wavefronts, there is frequency aliasing in multiple groups of fringes, so its wavefront cannot be measured directly. A physical model of the multi-order diffracted wavefronts emitted by CGH is established, and the interference of multiple sets of wavefronts is simulated numerically. To solve the frequency aliasing problem, a tilted carrier beam is introduced by using transmission holography to separate the frequency of the target wavefront from those of the other orders. Thus, the frequency of the target order is extracted, and the cylindrical wavefront is recovered according to its frequency. In this paper, the distribution of experimental fringes is consistent with the simulated fringes, which verifies the accuracy of the physical model. The simulation results show that the proposed method can theoretically separate and recover the cylindrical wavefront well, proving the method's theoretical feasibility.

Citation Download Citation

Zhijun Ying, Xingyu Lin, Xuanyu Chai, and Yingjie Yu "Cylindrical CGH wavefront calibration method based on transmission holography", Proc. SPIE 12550, International Conference on Optical and Photonic Engineering (icOPEN 2022), 1255026 (27 January 2023); https://doi.org/10.1117/12.2670483

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Wavefronts

Computer generated holography

Wavefront errors

Diffraction

Calibration

Fourier transforms

Error analysis

Show All Keywords

Keywords/Phrases

Search In:

Publication Years