Increased horizontal viewing zone angle of a hologram by resolution redistribution of a spatial light modulator.
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.
Takaki
Yasuhiro
Y
Institute of Symbiotic Science and Technology, Tokyo University of Agriculture and Technology, Tokyo, Japan. ytakaki@cc.tuat.ac.jp
Hayashi
Yuki
Y