A polymeric optical pattern-recognition system for security verification
Article Abstract:
A high-efficiency photorefractive polymer serves as a nonlinear medium in which real-time all-optical image correlation and pattern-recognition can take place. These are required for an optical security system, in which documents are encoded with almost invisible phase masks. These can be rapidly screened for verification of the authenticity of the documents. The wavelengths at which the optical system functions are compatible with commercial low-power semiconductor laser diodes.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
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Update on 3D displays
Article Abstract:
The article discusses a new approach and design of an updatable, three-dimensional display, which is completely based on the inexpensive, easy-to-process photorefractive polymer materials. The display has the capability of providing realistic three-dimensional images and hence can be widely used in military and medical applications.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2008
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An updatable holographic three-dimensional display
Article Abstract:
The design and development of a new updatable holographic three-dimensional (3D) display based on photorefractive polymers are discussed. The display is found to be the largest photorefractive display and is widely used for several medical, industrial and military imaging applications.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2008
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