Timothy D. Hudson

  • Citations Per Year
Learn More
Key performance characteristics of an optically addressed ferroelectric liquid-crystal spatial light modulator have been measured and compare favorably with those of other commercially available spatial light modulators. Several characteristics that are important for optical pattern recognition, including imaging resolution, visibility, and response time,(More)
The recent production of a deformable mirror device (DMD) spatial light modulator has naturally led to techniques of using this device in popular optical correlator architectures. In this paper, the DMD is used in both joint transform and VanderLugt arrangements. In some cases, the DMD is used as the input device to a single stage joint transform(More)
A set of twelve specially doped lithium niobate crystals were grown to test the effect of the dopant on holographic recording in the crystals via the photorefractive effect. The crystals were doped with Ce, Co, Cr, Cu, Fe, Mn, Ni, Rh, Tb, Fe:Ce, Fe:Cr, and Fe:Mn. The transmission spectra was measured for each crystal and holograms have been written in each(More)
We present the design of a bipolar composite filter (BCF) by a simulated annealing algorithm. By minimizing the energy function of the system, we construct an out-of-plane rotation-invariant bipolar filter. We show that the BCF offers high pattern discrimination capability and can easily be implemented with an electronically addressed spatial light(More)
These ideals have a description in terms of the coordinates, or spectrum, that is a natural extension of one description of meet irreducible ideals in the upper triangular matrices. Additional information is available if the limit algebra is an analytic subalgebra of its C-envelope or if the analytic algebra is trivially analytic with an injective(More)
We study the support and essential support functions of a normclosed bimodule of a nest algebra. An allowable support function pair determines a maximal bimodule. There is also a natural candidate for the minimal bimodule for a given support function pair. We determine precisely when this candidate is the minimal element. In the other cases, this module is(More)