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Improve on the uniformity of reconstructed output from computer generated hologram with a pre-compensate method


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Title Improve on the uniformity of reconstructed output from computer generated hologram with a pre-compensate method
Title of Series The 8th International Symposium on Display Holography (ISDH 2009)
Part Number 43
Number of Parts 57
Author Hsieh, Mei-Li
Liao, Hung-Chia
License CC Attribution - NoDerivatives 2.0 UK: England & Wales:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
DOI 10.5446/21862
Publisher River Valley TV
Release Date 2012
Language English
Production Place Shenzhen, China

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Subject Area Information technology
Abstract The main advantage of the computer generated hologram (CGH) is that it is easy to design and fabricate the hologram without real objects and optical system. There are few techniques to display the hologram generated by computer, such as the micro-lithographic technique or spatial light modulator. Among these two techniques, the distribution of CGH is fabricated or display in these devices which with pixelated structure. Hence, the uniformity of the reconstructed image is modified by the sinc function due to the pixelated structure of the display devices for the computer generated hologram (CGH). To minimize and compensate the uniformity, we proposed a pre-compensate method for CGH, which is designed using the Iterative Fourier Transformation Algorism (IFTA). In this contribution, the pre-compensated method for binary phase CGH will be presented. Also, the optical properties of the reconstructed image from binary phase CGH with the pre-compensate method will be discussed and compare with the reconstructed images without the pre-compensate method. In addition, the optical reconstructed system will be setup using the spatial light modulator to display the binary phase CGH, and the experimental results will be demonstrated. The uniformity of the reconstructed image with the pre-compensate method will be measured and discussed.


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