Using electronic holography to generate speckle-free and shaded reconstructed images
Using electronic holography to generate speckle-free and shaded reconstructed images
复制标题
使用电子全息术生成无散斑和阴影的重建图像
DOI：
10.1117/12.2003437
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
T. Kurihara and Y. Takaki
中科院分区：
文献类型：
--
作者：
K. Shiraishi;M. Kofuji;Y. Inagawa;H. Yoda;and C. S. Tsai;T. Kurihara and Y. Takaki
提出了一种无散斑、再现像有阴影的全息显示技术。三维（3D）对象由对象点组成，对象点被划分为以时间顺序方式显示的多个对象点组。在每个物点组中，物点阵列稀疏地分离，使得它们之间不发生干涉。每个物点组通过在高速空间光调制器（SLM）上显示波带片的二维（2D）阵列来生成。波带片的振幅分布被二维调制，以控制从物点发射的光的角强度分布，从而遮蔽重建图像。SLM生成由不同光功率照射的多个二进制图像，以时间顺序的方式表示2D调制波带片。采用数字微镜器件（DMD）作为高速SLM。分辨率为1，024 × 768，帧速率为22.727 kHz。每个物点组由16 × 24个物点组成。重建图像由16 × 8个物点组组成，总共获得256 × 192个物点。八个二值图像代表每个对象点组。3D图像生成的帧速率为22.2 Hz。
A hologram display technique that provides speckle-free and shaded reconstructed images is proposed. A three-dimensional (3D) object is composed of object points, which are divided into multiple object point groups displayed in a time-sequential manner. In each object point group, an array of object points are sparsely separated, so that interference does not occur between them. Each object point group is generated by displaying a two-dimensional (2D) array of zone plates on a high-speed spatial light modulator (SLM). The amplitude distribution of the zone plates is modulated two-dimensionally to control the angular intensity distribution of light emitted from the object points to shade reconstructed images. The SLM generates multiple binary images illuminated by different light powers to represent 2D modulated zone plates in a time-sequential manner. A Digital micromirror device (DMD) was used as the high-speed SLM. The resolution was 1,024 × 768, and the frame rate was 22.727 kHz. Each object point group consists of 16 × 24 object points. The reconstructed image consists of 16 × 8 object point groups to obtain a total of 256 × 192 object points. Eight binary images represented each object point group. The frame rate for 3D image generation was 22.2 Hz.