Image processing using volume reflection gratings in a photorefractive material

Austin Scott; Partha P. Banerjee

doi:10.1117/12.2633549

3 October 2022 Image processing using volume reflection gratings in a photorefractive material

Austin Scott, Partha P. Banerjee

Proceedings Volume 12225, Optics and Photonics for Information Processing XVI; 1222509 (2022) https://doi.org/10.1117/12.2633549
Event: SPIE Optical Engineering + Applications, 2022, San Diego, California, United States

Abstract

Spatial transfer functions of a volume reflection grating written in photorefractive lithium niobate have been derived and simulated. The Helmholtz equation has been solved analytically under the assumptions that the formed grating is lossless, only two waves exist in the solution, and the wave envelopes are slowly varying functions of space. The grating is assumed to be un-slanted, and the writing and reading wavelengths are equal to 514.5 nm in vacuum. Upon being probed in the reflection geometry, the reflected field experiences low pass spatial filtering, and the transmitted field experiences high-pass spatial filtering. The respective strength of this filtering is determined by the index modulation depth of the reflection grating. Simulation results show this 2D image processing capability of volume reflection gratings in photorefractive materials. In addition, a system has been constructed to test these results experimentally, with initial experimental evidence of spatial filtering.

Conference Presentation

Citation Download Citation

Austin Scott and Partha P. Banerjee "Image processing using volume reflection gratings in a photorefractive material", Proc. SPIE 12225, Optics and Photonics for Information Processing XVI, 1222509 (3 October 2022); https://doi.org/10.1117/12.2633549

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