Phase retrieval of vitreous floaters: simulation experiment

V. Karitans; M. Ozolinsh; S. Fomins; A. Antonuka; N. Tetervenoka

doi:10.1117/12.2573785

10 October 2020 Phase retrieval of vitreous floaters: simulation experiment

V. Karitans, M. Ozolinsh, S. Fomins, A. Antonuka, N. Tetervenoka

Proceedings Volume 11548, Optical Design and Testing X; 115481K (2020) https://doi.org/10.1117/12.2573785
Event: SPIE/COS Photonics Asia, 2020, Online Only

Conference Poster

Abstract

Knowledge of the structure of vitreous floaters is crucial to evaluate the need for surgical removal of these floaters. We simulated the phase retrieval of microstructures simulating vitreous floaters by an algorithm PhaseLift and investigate the effects of various parameters on the retrieved phase. The object under test was modulated and the coded diffraction patterns were calculated. Next, PhaseLift was used to retrieve the phase. In the current study, we simulate the effect of Gaussian and Poison noise on the phase retrieval of pure phase objects. We apply an iterative algorithm PhaseLift for phase retrieval as this algorithm requires a very few modulating masks and is able to retrieve the phase of an object from very sparse data. Both types of noise are added to the intensity measurements and their effect on the retrieved phase is assessed in terms of the root-mean-square error. We conclude that Poisson noise compromises the accuracy of phase retrieval more compared to Gaussian noise given that the levels of both types of noise are equal. We also conclude that the thermal noise having nearly Gaussian distribution is of less importance compared to the shot noise having Poisson distribution and dominating at low-light levels.

Conference Presentation

Citation Download Citation

V. Karitans, M. Ozolinsh, S. Fomins, A. Antonuka, and N. Tetervenoka "Phase retrieval of vitreous floaters: simulation experiment", Proc. SPIE 11548, Optical Design and Testing X, 115481K (10 October 2020); https://doi.org/10.1117/12.2573785

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