A compact and lens less digital holography setup for polarimetric analysis of spatial light modulator

Abstract

A compact, stable and lens less digital holographic system is proposed and experimentally demonstrated for a polarimetric analysis of the spatial light modulator (SLM). The experimental design is implemented by using a robust cyclic shearing interferometer consisting of two mirrors and a beam splitter. A polarimetric response of the spatial light modulator with varying gray levels has been characterized by quantitatively extracting the complex fields of the orthogonal polarization components of the light emerging out of the reflective type SLM and results are presented. In order to examine stability of the proposed system, the experiment is performed on a table top and also in the presence of additional external vibrations. These results are compared with earlier results implemented by using a combination of Mach-Zehnder setup along with angular multiplexing of the reference fields. The obtained results indicate that the proposed technique is suitable even under external disturbances. The proposed technique is expected to be beneficial for the polarimetric imaging of objects and in the design of a stable digital holographic system. © 2023 Elsevier Ltd