The invention relates to an augmented reality device and an optical system thereof, the optical system includes: an image projection light source; a spectroscope assembly, the spectroscope assembly having a spectroscopic surface close to the image projection light source and a transmission surface away from the image projection light source; a wave plate, the wave plate close to the spectroscopic surface, and the spectroscope assembly arranged as the image projection light source The output image source light can irradiate and reflect at least partially towards the wave plate; and a half mirror located downstream of the wave plate in the reflected light path, wherein the beam splitter assembly is configured to irradiate the image source light emitted from the image projection light source to the light distribution surface, and the polarized light component with the first polarization state passes through the Division The optical mirror assembly transmits from the transmission surface, and the polarized light component in the second direction perpendicular to the first direction reflects from the light distribution surface to the wave plate, and the spectroscope assembly is also configured to transmit the polarized light component in the first direction from the light distribution surface after the light incident on the transmission surface And the polarized light component whose polarization state is the second direction can be absorbed in the spectroscope assembly, wherein the wave plate is preferably one quarter wave plate. By adopting the technical means of the invention, the influence of interference light on the imaging quality can be eliminated, and the influence of stray light can be eliminated at the same time.
【技术实现步骤摘要】
【国外来华专利技术】PCT国内申请，说明书已公开。
【技术保护点】
PCT国内申请，权利要求书已公开。/n
【技术特征摘要】
【国外来华专利技术】20180212...
【专利技术属性】
技术研发人员：肖冰，梁晓斌，徐驰，
申请(专利权)人：优奈柯恩北京科技有限公司，
类型：发明
国别省市：北京;11
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