Analysis of defocus invariance of typical wavefront coding phase mask under temperature gradient environment

Jing Sheng; Huaiyu Cai; Yi Wang; Xiaodong Chen

doi:10.1117/12.2615938

22 July 2022 Analysis of defocus invariance of typical wavefront coding phase mask under temperature gradient environment

Jing Sheng, Huaiyu Cai, Yi Wang, Xiaodong Chen

Author Affiliations +

Proceedings Volume 12277, 2021 International Conference on Optical Instruments and Technology: Optical Systems, Optoelectronic Instruments, Novel Display, and Imaging Technology; 1227704 (2022) https://doi.org/10.1117/12.2615938
Event: 2021 International Conference on Optical Instruments and Technology, 2022, Online Only

Abstract

The wavefront coding technology can improve the depth of focus of traditional optical systems. Thus, the influence of thermal defocus on the imaging quality of the infrared system canbe effectively reduced when applied the wavefront coding technology to the athermalization design process. Till now, the analysis of the athermalization wavefront coding system is all under the uniform temperature distribution condition. Aiming at the environment with uneven temperature and gradient distribution, this paper used the temperature gradient polynomial to simulate the temperature distribution model, and calculated the phase function of the typical phase mask. Modulation transfer function (MTF) and point spread function (PSF) are calculated by simulation methods. And analyzing the effects of different temperature gradient values and different temperature gradient orders by Hilbert angle, MTF area and Fisher information. The simulation results show that, the typical wavefront coding phase mask can work normal under a certain range of temperature gradient. When the simulation had been done at the thickness of the phase mask is 4mm and radius is 6mm, the cubic phase mask can still work properly in the gradient range [−10^oC/mm, 10^oC/mm . And the larger gradient order, the the greater the influence on the imaging of wavefront coding system.

Citation Download Citation

Jing Sheng, Huaiyu Cai, Yi Wang, and Xiaodong Chen "Analysis of defocus invariance of typical wavefront coding phase mask under temperature gradient environment", Proc. SPIE 12277, 2021 International Conference on Optical Instruments and Technology: Optical Systems, Optoelectronic Instruments, Novel Display, and Imaging Technology, 1227704 (22 July 2022); https://doi.org/10.1117/12.2615938

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