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Proceedings Article

Full-complex spatial filtering with a phase mostly DMD

[+] Author Affiliations
James M. Florence

Texas Instruments Inc. (USA)

Richard D. Juday

NASA/Johnson Space Ctr. (USA)

Proc. SPIE 1558, Wave Propagation and Scattering in Varied Media II, 487 (November 11, 1991); doi:10.1117/12.49655
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From Conference Volume 1558

  • Wave Propagation and Scattering in Varied Media II
  • Vijay K. Varadan
  • San Diego, CA | July 21, 1991

abstract

A new technique for implementing fully complex spatial filters with a phase mostly deformable mirror device (DMD) light modulator is described. The technique combines two or more phase-modulating flexure-beam mirror elements into a single macro-pixel. By manipulating the relative phases of the individual sub-pixels within the macro-pixel, the amplitude and the phase can be independently set for this filtering element. The combination of DMD sub-pixels into a macro-pixel is accomplished by adjusting the optical system resolution, thereby trading off system space bandwidth product for increased filtering flexibility. Volume in the larger dimensioned space, space bandwidth-complex axes count, is conserved. Experimental results are presented mapping out the coupled amplitude and phase characteristics of the individual flexure-beam DMD elements and demonstrating the independent control of amplitude and phase in a combined macro-pixel. This technique is generally applicable for implementation with any type of phase modulating light modulator.

© (1991) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

James M. Florence and Richard D. Juday
"Full-complex spatial filtering with a phase mostly DMD", Proc. SPIE 1558, Wave Propagation and Scattering in Varied Media II, 487 (November 11, 1991); doi:10.1117/12.49655; http://dx.doi.org/10.1117/12.49655


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