Takaki Yasuhiro, Hayashi Yuki
Institute of Symbiotic Science and Technology, Tokyo University of Agriculture and Technology, Tokyo, Japan.
Appl Opt. 2008 Jul 1;47(19):D6-11. doi: 10.1364/ao.47.0000d6.
The narrow viewing zone angle is one of the problems associated with electronic holography. We propose a technique that enables the ratio of horizontal and vertical resolutions of a spatial light modulator (SLM) to be altered. This technique increases the horizontal resolution of a SLM several times, so that the horizontal viewing zone angle is also increased several times. A SLM illuminated by a slanted point light source array is imaged by a 4f imaging system in which a horizontal slit is located on the Fourier plane. We show that the horizontal resolution was increased four times and that the horizontal viewing zone angle was increased approximately four times.
窄视场角是与电子全息术相关的问题之一。我们提出了一种能够改变空间光调制器（SLM）水平和垂直分辨率之比的技术。该技术将SLM的水平分辨率提高了几倍，从而使水平视场角也增大了几倍。由倾斜点光源阵列照明的SLM通过一个4f成像系统成像，其中在傅里叶平面上放置了一个水平狭缝。我们表明，水平分辨率提高了四倍，水平视场角大约增大了四倍。
