Abstract
A diffractive optical element contains a diffraction pattern that is a spatial Fourier transform of a random pattern. The diffraction pattern may be etched or deposited on a surface of the diffractive optical element. Alternatively, a spatial light modulator (SLM) may be driven to project the diffraction pattern dynamically.
Original language | American English |
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Patent number | US patent No. 9063283 |
State | Published - 2005 |