Use of a Continuous Wave and Pulsed-Ruby Laser to make Portrait Holograms and Determine Viability for Digital Data Storage
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Publisher:The Ohio State University
Series/Report no.:The Ohio State University. Department of Physics Undergraduate Research Theses; 2012
Holography is a field with the goal of storing 3-dimensional data in a 2-dimensional plane. Looking into future methods of digital data storage as well as media display techniques, holography offers the possibility of communicating large quantities of data through a convenient medium through recording the interference pattern between a uniform plane wave front and a modulated object wave front. Holograms are able to recreate the parallax and depth one views in three dimensions. Using a continuous wave (CW) laser and a pulsed-ruby laser I have made several portrait holograms that are judged by a set of criteria and are compared to determine the strengths of each method to be used in digital holography. CW laser methods offer full color holograms with low cost equipment that continually transmit information. If the beam modulator changes frame smoothly, the continuity of the CW lasers will allow for smooth frame changes. However, CW laser methods generally have lower resolution due to movement during recording and therefore lack the flexibility to record moving or living subjects. Pulse laser methods offer high-resolution holograms with greater depth, and can record moving subjects. The equipment cost is high however, with considerable effort needed to minimize size. With discretely changing digital beam modulators, pulse technology will allow for frame changes in between pulses.
Successfully defended for graduation with research distinction
Arts and Sciences Undergraduate Research Scholarship
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