Li Gang, Jeong Jinsoo, Lee Dukho, Yeom Jiwoon, Jang Changwon, Lee Seungjae, Lee Byoungho
Opt Express. 2015 Dec 28;23(26):33170-83. doi: 10.1364/OE.23.033170.
A space bandwidth product (SBP) enhancement method for holographic display using high-order diffraction of a spatial light modulator (SLM) is proposed. Among numerous high order diffraction terms, the plus-minus first and the zeroth are adopted and guided by holographic optical elements (HOEs) to an identical direction with the same intensity. By using a set of electro-shutters synchronized with corresponding order component, the system acts as if three SLMs are tiled in the horizontal direction. To confirm the feasibility of using HOE as the guiding optics for the system, several optical characteristics of the recording material are measured before using them. Furthermore, a computer generated hologram algorithm is proposed for compensating the wavefront distortion caused by use of the HOE. The demonstrated system achieves a three-fold increase in SBP of a single SLM. The results are verified experimentally.
提出了一种利用空间光调制器（SLM）的高阶衍射实现全息显示的空间带宽积（SBP）增强方法。在众多高阶衍射项中，采用正负一级和零级衍射项，并通过全息光学元件（HOE）将它们引导到相同方向且强度相同。通过使用一组与相应级次分量同步的电子快门，该系统的作用就好像三个SLM在水平方向上拼接在一起。为了确认使用HOE作为系统引导光学器件的可行性，在使用记录材料之前测量了其几个光学特性。此外，还提出了一种计算机生成全息图算法，用于补偿使用HOE引起的波前畸变。所展示的系统实现了单个SLM的SBP提高三倍。实验验证了结果。
