傅里叶变换计算全息彩色再现  

Color reconstructed image of Fourier computer-generated hologram

作　　者：孙萍[1,2] 王众[1,2] 罗玉晗[1,2] 魏祎雯[1,2] 

机构地区：[1]北京师范大学物理系,北京100875 [2]北京师范大学北京市应用光学重点实验室,北京100875

出　　处：《物理实验》2012年第10期1-5,F0003,共6页Physics Experimentation

基　　金：北京自然科学基金项目(No.4102031);北京市大学生科学研究与创业行动计划项目资助

摘　　要：通过博奇编码获得傅里叶变换计算全息图,将其加载在空间光调制器上进行光学再现,分析了影响再现像分辨率和色彩还原性的因素.实验结果表明:基元尺寸与再现像的大小与中心位置成反比;单色光波长与再现像的大小与中心位置成正比;滤光片三基色的透过率不同和半高全宽将分别影响再现像的色彩还原性和分辨率;CMOS三基色的光谱灵敏度不同也是再现像色彩失真的原因之一.基元尺寸和波长的影响用比例系数修正,滤光片与CMOS的影响用权重系数修正,实现了彩色再现像的色彩不失真合成.The Fourier computergenerated holograms loaded on a spatial light modulator were optically reconstructed. The hologram was encoded with the method of Burch encoding. The factors af fecting color reconstructed image of Fourier computergenerated hologram, such as resolution and col or reproduction were analyzed. Experimental results showed that the cell size was inversely propor tional to the size and central location of the reconstructed images monochromatic wavelength was pro portional to the size and central location of the reconstructed image the transmittance and halfwidth of trichromatic filters affected the color reproduction and resolution; spectral sensitivity of CMOS was one of the reasons causing chromatic aberration. The influences of cell size and the wavelength could be eliminated using proportional coefficient and those of filters and CMOS could be eliminated using weight coefficient. The synthesis of the color reconstructed images without distortion was realized u sing the correction method in this paper.

关 键 词：傅里叶变换计算全息 博奇编码 三基色 彩色再现像 

分 类 号：O436[机械工程—光学工程]