title: Full-field phase modulation characterization of liquid-crystal spatial light modulator using digital holography.
abstract: A direct quantitative phase measurement method to characterize intrinsic phase modulation from an entire active area of transmissive twisted-nematic liquid-crystal spatial light modulator (TN-LCSLM) is presented using digital holography (DH). The change in birefringence of liquid crystal material with respect to addressed gray scale produces phase modulation of wavefront transmitted through TN-LCSLM. Existing methods for phase modulation characterization of LCSLM mainly provides point measurement on its total active region. In this paper, the DH method is evolved to extract quantitative phase information of an entire active area from a single digital hologram formed using the complex wavefront transmitted through TN-LCSLM.
authors.affiliation: School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798. kapi0001@e.ntu.edu.sg
authors.forename: Kapil
authors.initials: K
authors.lastname: Dev
authors.forename: Vijay Raj
authors.initials: VR
authors.lastname: Singh
authors.forename: Anand
authors.initials: A
authors.lastname: Asundi