Optics-less Sensors for Localization of Radiation Sources (2008)
Caulfield, H. J., Yaroslavsky, L. P., Goerzen, Ch., Umansky, S.
A new family of radiation sensors is introduced which do not require any optics. The sensors consist of arrays of elementary sub-sensors with natural cosine-law or similar angular sensitivity...
LOW WORK FUNCTION SEMICONDUCTOR COLLECTORS. (2005)
Chapman,R. A., Caulfield,H. J.
Report on Basic Research in Thermionics.
LOW WORK FUNCTION COLLECTORS. (2005)
Chapman, R. A., Caulfield, H. J., Clendinning, W. R.
Films of Cs-Sb, Cs-Al2O3-Al, Cs-Ta2O5, Cs-WC, Cs-Au, Cs-Bi, Cs-Pb, and Cs-Ni-Sb were studied as collector electrodes. Relative collector work functions were compared in a multiple collector device...
A Study of Real Time Signal Processing Methods for Decoding Spread Spectrum Systems. (2002)
Caulfield,H. J., Haimes,Robert, Mueller,Peter
Spread spectrum signals require several kinds of processing. First, the effects of tracking error, Doppler shifts, etc. must be compensated out or ignored in some clever way to give the 'raw' signal....
Generalized Matched Filters. (2002)
Caulfield,H. J., Mueller,P. E., Weinberg,M. H., Epstein,A. H.
Matched filters (MF's) are easy to make optically but fail to take into account either within-class variations or between-class similarities. We show a general method for taking those effects into...
Gaynor, E. S., Caulfield, H. J.
The purpose of this Phase I SBIR contract was to invent ways of using switchable holograms to change from one optical interconnect pattern to another with great speed. That is, we sought to combine...
Investigation of High Efficiency Generalized Matched Filters. (2002)
In a previous RADC contract Aerodyne worked on developing an improved algorithm for reducing the rotational dependency of matched filters for use in optical pattern recognition systems. This present...
Bimodal Optical Computer. (2002)
Caulfield,H. J., Gruninger,J. H., Steiglitz,K., Rabitz,H., Gelfand,J.
Much of the current attention being given to optical computing stems from its new found ability to perform digital operations and hence to achieve high accuracy. In optics as in electronics, digital...
Optical Systolic Array Processors. (2002)
Caulfield,H. J., Israel,Scott, Putnam,Roger
Multiplication with 16 bit accuracy can be accomplished by optical means and is competitive and superior in speed to fully electronic devices if a sum-of-products algorithm is being implemented. The...
Fuzziness in Quantum Mechanics (2001)
It is shown that quantum mechanics can be regarded as what one might call a "fuzzy" mechanics whose underlying logic is the fuzzy one, in contradistinction to the classical "crisp" logic. Therefore...
MM&T: Bibliography on Optical Testing with Appendix. (1998)
Cornejo-Rodriguez,Alejandro, Caulfield,H. J., Friday,William
The following is a major expansion of 'Bibliography on Various Optical Testing Methods,' by Daniel Malacara, Alejandro Cornejo, and M. V. R. K. Murty which appeared in Applied Optica, 14, 1065 - 1080...
FONR Optical Computing ST. (1998)
As noted in our original proposal, most of our effort has been in hybrid analog-digital algebra and in massively parallel processing based on hologram arrays. Both programs have exceeded our...
Holographic Modulator Arrays. (1998)
The report contains an assessment of the performance of a spatial light modulator concept known as double phase conjugate mirrors using a barium titanate crystal as the conjugating medium. It was...
Opto-EM and Devices Investigation. (1998)
Adamski, Joseph A., Bloom, Jerome H., Caulfield, H. J., Comer, Joseph J., Kennedy, Robert S.
This report is composed of seven sections. It provides a summary of work accomplished under this contract in several diverse areas of optical transmission, materials processing. The areas include: A...
Optical Computing Strategies. (1998)
This report covers a very diverse effort to explore and develop the role of optical computing for SDI purposes. The effort was in two fields: Optical Algebra and Massive Parallel Holographic...
A/U of Dayton Photorefractive Beam Tracking. (1998)
Duthie, Grame, Caulfield, H. J.
This report explains the properties of Barium Titanate being used for communication applications. Research was done dealing with steady state and transient behavior of several double phase conjugate...
A/GATECH DOSP Fabrication. (1998)
Caulfield, H. J., Kupiec, Steven
The beginning of a true massively parallel processor based on holographic technology is presented. The theory, algorithms, and initial research are set forth and explored. Preliminary research...
Digital Optical Computing. (1998)
Within our previous report, we have described a digital computer architecture, the HOPLA, and algorithms that effectively exploit that architecture. Within the present report, we shall examine the...
Stimulated Emission without Cavity in Powders and Single Crystals of Nd Doped Materials, (1998)
Noginov, M. A., Noginova, N. E., Caulfield, H. J., Venkateswarlu, P., Thompson, T. T.
Short (>300 ps) pulses of stimulated emission were found from powders of NdAl3(BO3)4, NdSc3(BO3)4, and Nd:Sr5(PO4)3F laser crystals under 532 nm and 805 nm excitation. Study of stimulated emission in...
Electrooptic Modulation Research. Electrooptic Modulators. (1998)
Caulfield, H. J., Zhang, Zhenli
The work is aimed mainly at improving the overall performance of Pockels electrooptic modulators. Current Pockels cells have very limited field of view, high driving voltages, and low speed. This...
Biometric Authorization and Registration Systems and Methods (1998)
Caulfield, H. J., Halter, Ernest
Biometric authorization and registration systems and methods are disclosed. In one embodiment, the system preferably comprises a firearm that includes a biometric authorization system, a plurality of...
Digital Optical Computing. (1997)
Ololo, Anthony, Caulfield, H. J.
This effort examined the use of Dammann gratings for optical interconnects within hybrid optoelectronic or all-optical computers. In the effort Genetic algorithm codes were developed in C + +....
Optical Interconnection for Electronic and Optical Computers. (1997)
This was a broad multi-year effort aimed at the advancement of modern optical sciences in several areas. This report summarizes solid achievement in multiple areas.
A Weight Discretization Paradigm for Optical Neural Networks (1990)
Fiesler Choudry, E. Fiesler, A. Choudry, H. J. Caulfield
Neural networks are a primary candidate architecture for optical computing. One of the major problems in using neural networks for optical computers is that the information holders: the...