体散射片制备及静态激光散斑抑制

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关键词：激光显示；激光散斑；体散射片；静态散斑抑制

中图分类号：0439 文献标识码：A

doi：10.37188/OPE.20263401.0053 CSTR：32169.14.OPE.20263401.0053

Fabrication of volume scattering diffuser and static laser speckle suppression

WU Qizhou 1 ， JIA Bei1，CHEN Yalin²，YAN Yuxiang²，MA Weiguang²，TONG Zhaomin²

State Key Laboratory of Extreme Environment Optoelectronic Dynamic Measurement Technology and Instrument， School ofInformation and Communication Engineering， North University of China， Taiyuan O30051，China;

State Key Laboratory of Quantum Optics Technologies and Devices ， Institute ofLaser Spectroscopy， Shanxi University， Taiyuan O3OOO6，China） * Corresponding author，E-mail： zhaomin. tong@sxu. edu. cn

Abstract：To mitigate speckle arising from the high coherence of lasers in display applications，a static speckle-suppression approach is proposed based on a volume scattering difuser （VSD） formed from a mixture of polystyrene（PS） microspheres and polydimethylsiloxane.PS microspheres with an average diameter of 600-7OO nm were synthesized via soap-free emulsion polymerization，and VSDs with varying thicknesses were fabricated by spin coating. The scattering capability of the VSD was enhanced with increasing thickness as the spin-coating speed decreased from 1300r/min to 600r/min ，and the scattering angle increased from 44∘ to 100∘ . In an optical test system，thicker VSDs more effectively reduced the temporal and spatialcoherence of the laser，lowering the speckle contrast to O.35.This work demonstrates an external-driver-free，noiseless，and high-eficiency static technique for laser speckle suppression in laser displays，with significant application potential.

Key Words ： laser display； laser speckle；volume scattering diffuser; static speckle suppression

1引言

激光显示作为新一代显示技术，具有宽色域、高亮度与长寿命等优点，已广泛应用于家庭影院、商业投影、数字影院、车载显示以及虚拟现实（VirtualReality，VR）和增强现实（AugmentedReality，AR）等领域[1]。（剩余10943字）