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Improvement of direct fringe printer for computer-generated holograms

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Title
Improvement of direct fringe printer for computer-generated holograms
Title of Series
Part Number
24
Number of Parts
61
Author
License
CC Attribution 3.0 Unported:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or 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.
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Publisher
Release Date2012
LanguageEnglish

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Abstract
It is becoming possible to calculate computer-generated holograms of three-dimensional objects that have more than one billion pixels, even with normal personal computers. On the other hand, it is not so easy to output the calculated result as a hologram that must have micron order resolution for practical three-dimensional display. We have been developing a fringe printer, which consists of a laser, an X–Y stage and a liquid crystal panel as a spatial light modulator. A fractional part of the entire holographic fringe is displayed on the liquid crystal panel, and the demagnified image of it is recorded on a holographic plate. Then the plate is translated by the X–Y stage to write the next part of the fringe. In this report, a 0.5 M pixel transmission LC panel is replaced by a 1.3 M pixel reflection type panel. Since the number of exposures is reduced, a more than fourfold improvement in the printing speed is obtained.