摘要
针对激光显示中因激光的高相干性所引起的散斑问题,提出一种基于聚苯乙烯(PS)微球与聚二甲基硅氧烷混合物的体散射片(Volume Scattering Diffuser,VSD),以用于静态激光散斑抑制。采用无皂乳液聚合法合成了平均粒径600~700 nm的PS微球,并通过旋涂法制备了不同厚度的VSD。实验结果表明,当VSD旋涂速度从1300 r/min降低至600 r/min时,VSD的散射能力随其厚度的增加而增强,散射角从44°升高至100°。在光学测试系统中,较厚的VSD能更有效地破坏激光的时间和空间相干性,使散斑对比度降低至0.35。本研究为激光显示系统提供了一种无需外部驱动、无噪音且高效的静态激光散斑抑制方案,具有重要的工程应用价值。
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 diffuser(VSD)formed from a mixture of polystyrene(PS)microspheres and polydimethylsiloxane.PS microspheres with an average diameter of 600-700 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 1300 r/min to 600 r/min,and the scattering angle increased from 44°to 100°.In an optical test system,thicker VSDs more effectively reduced the temporal and spatial coherence of the laser,lowering the speckle contrast to 0.35.This work demonstrates an external-driver-free,noiseless,and high-efficiency static technique for laser speckle suppression in laser displays,with significant application potential.
作者
吴其洲
贾蓓
陈亚琳
燕宇翔
马维光
仝召民
WU Qizhou;JIA Bei;CHEN Yalin;YAN Yuxiang;MA Weiguang;TONG Zhaomin(State Key Laboratory of Extreme Environment Optoelectronic Dynamic Measurement Technology and Instrument,School of Information and Communication Engineering,North University of China,Taiyuan 030051,China;State Key Laboratory of Quantum Optics Technologies and Devices,Institute of Laser Spectroscopy,Shanxi University,Taiyuan 030006,China)
出处
《光学精密工程》
北大核心
2026年第1期53-60,共8页
Optics and Precision Engineering
基金
国家科技重大专项资助项目(No.2025ZD0616600)
长江学者和创新团队发展计划资助项目(No.IRT_17R70)
高等学校学科创新引智计划(111计划)资助项目(No.D18001)
山西省留学回国人员科技活动择优资助项目(No.20210038)。
关键词
激光显示
激光散斑
体散射片
静态散斑抑制
laser display
laser speckle
volume scattering diffuser
static speckle suppression
