Stripe Noise Removal in Blazed Grating Generation for Electrically Tunable Beam Deflector.

ABSTRACT: In this paper, we demonstrate a blazed phase grating to achieve tunable beam steering and propose a novel algorithm to reduce the stripe noise in wrapped phase. To control the diffraction angle to steer light to the desired direction, an electrically tunable transmission-type beam deflector based on liquid crystals is introduced, and electric fields are applied to the patterned indium tin oxide electrodes to change its phase retardation. Two different 2π phase-wrapping methods are applied to obtain various diffraction angles within the minimum cell-gap, and the method of equal interval of phase achieves a worthwhile diffraction efficiency compared to the methods based on equal interval of diffraction angle. The proposed method is able to completely eliminate the stripe noise in all steerin

SUBMITTER: Kim W 

PROVIDER: S-EPMC11766839 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature