Abstract
We present a novel approach that utilizes both physical tiling and optical scan-tiling of high-speed electrically addressed spatial light modulator (SLM) for increasing the pixel count of hologram. Twenty-four SXGA (1280×1080) high-speed ferroelectric liquid crystal on silicon are first physically tiled to form an 8(rows)×3(columns) SLM array. This array is further tiled to form a final hologram with pixel count of 377.5 Megapixels through a 1-axis galvanometric scanning mirror. A large computer-generated hologram is calculated and fed into the individual SLMs according to the predefined sequence. Full-color and full-parallax flickless three-dimensional objects are replayed at a rate of 60 frames per second in a 10-in. display window. The launching of the hologram, laser illumination, and scanning mirror are synchronized and controlled by a field-programmable gate array.
Highlights
Traditional holographic recording can produce realistic and large three-dimensional (3-D) objects with a large viewing field
This increases the pixel count in the final hologram, which improves on the size of the reconstructed object
One method of increasing the pixel count of a hologram is to tile more than one spatial light modulator (SLM) physically
Summary
Traditional holographic recording can produce realistic and large three-dimensional (3-D) objects with a large viewing field. The Telecommunication Advancement Organization (TAO) in Japan[10,11] proposed a way of tiling SLMs physically by arranging five LCDs horizontally This method increased the pixel count and the horizontal viewing angle. A novel approach of increasing pixel count of hologram by the combined methods of physical and optical scan tiling is presented. This approach was implemented in our second-generation system and a large 3-D object was reconstructed successfully with screen size of 10 in. The hologram pixel count achieved is 377.5 Megapixels at refresh rate of 60 fps
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