The growing number of Unmanned Aerial Vehicles (UAVs) in both military and civilian sectors necessitates advanced tracking and detection systems. This paper presents the development and field trial results of a high-r...
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The phase-encoded joint transform correlator as a decoder of an optical double random phase encoding system is described. By using the phase-encoded joint transform correlator, it is possible to decode the encrypted i...
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ISBN:
(纸本)081942921X
The phase-encoded joint transform correlator as a decoder of an optical double random phase encoding system is described. By using the phase-encoded joint transform correlator, it is possible to decode the encrypted image with the same random phase mask which was used in the encryption procedure. The decoding algorithm and opticalsystems are described. Computer simulations confirm the proposed decoding algorithm.
An idea for security verification of identification such as passports, credit cards, and others in terms of difficulty of reproduction is proposed The polarization information is used for security verification. As the...
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ISBN:
(纸本)0819432903
An idea for security verification of identification such as passports, credit cards, and others in terms of difficulty of reproduction is proposed The polarization information is used for security verification. As the state of the polarization encoded cannot be seen by an ordinary intensity sensitive device such as a CCD camera, it cannot be copied For optical validation system, a joint transform correlator is used. Computer simulations and optical experimental results are shown to confirm our proposed method.
Two cryptographic methods for storing graphic information are presented in this paper. The information is encoded by phase modulation or the angular coding. The information are read out by means of holographic interfe...
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ISBN:
(纸本)0819425818
Two cryptographic methods for storing graphic information are presented in this paper. The information is encoded by phase modulation or the angular coding. The information are read out by means of holographic interference. Without decoding card,no one can read out the information stored in the informational card.
We review GaAs Fabry-Perot vertical cavity electro-optical devices constructed at Lockheed Martin Sanders, with particular attention to spatial light modulators and discuss a number of their applications. Our manufact...
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ISBN:
(纸本)081942921X
We review GaAs Fabry-Perot vertical cavity electro-optical devices constructed at Lockheed Martin Sanders, with particular attention to spatial light modulators and discuss a number of their applications. Our manufacturing processes enable the construction of large format, highly-uniform optical modulator and smart pixel arrays integrated with silicon CMOS VLSI circuitry. These devices can be used for a wide variety of applications including: optical computing for target recognition and signal processing, optical data routing, optical interconnect systems, and optical memory storage and access.
The theory of correlation filters does not make any assumptions about the sensor or image format. Thus the same class of algorithms is readily applicable to multiple sensor environments such as IR, SAR, LADAR, or CCD ...
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ISBN:
(纸本)081942921X
The theory of correlation filters does not make any assumptions about the sensor or image format. Thus the same class of algorithms is readily applicable to multiple sensor environments such as IR, SAR, LADAR, or CCD (visual). The advantage is that the same theory is valid for multiple sensor applications, the processing steps are common (and code) are re-usable in different sensor platforms, and the algorithms are rapidly re-trainable. The paper points out the key benefits resulting from the general formulation and solution resulting from the correlation approach to ATR.
An optical communication/switching system with data speeds well beyond any state-of-the-art electronic board-to-board computer interconnect is proposed. This interconnect is based on the use of microprism arrays to ac...
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ISBN:
(纸本)0819425818
An optical communication/switching system with data speeds well beyond any state-of-the-art electronic board-to-board computer interconnect is proposed. This interconnect is based on the use of microprism arrays to achieve large-scale, wideband interconnections for optoelectronic systems.
An all-optical reconfigurable crossbar switch is implemented by unique integration of dynamic photopolymer technology, simple geometry optics, and waveguide technology. This all-optical crossbar switch provides high r...
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ISBN:
(纸本)0819425818
An all-optical reconfigurable crossbar switch is implemented by unique integration of dynamic photopolymer technology, simple geometry optics, and waveguide technology. This all-optical crossbar switch provides high reconfigurability, large fanout, and radiation hardening. These characteristics are essential for both parallel/distributed processing and high-bandwidth communication, especially for B-ISDN.
A novel compact BNI architecture in free space is composed of symmetrical arrays of binary phase grating having advantages of high spatial density, no coupling material, wide bandwidth, low insertion loss, low crossta...
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ISBN:
(纸本)081942921X
A novel compact BNI architecture in free space is composed of symmetrical arrays of binary phase grating having advantages of high spatial density, no coupling material, wide bandwidth, low insertion loss, low crosstalk, compaciting system, easy cascading,etc..
In this paper we show how to use holographic photon echoes for the implementation of a variety of opticalprocessing functions, including scanners, spectrum analyzers, time-integrating correlators, folded spectrum ana...
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ISBN:
(纸本)0819432903
In this paper we show how to use holographic photon echoes for the implementation of a variety of opticalprocessing functions, including scanners, spectrum analyzers, time-integrating correlators, folded spectrum analyzers, ambiguity function processors, image sequence correlators, and folded image raster correlators. The combination of optical coherent transients operating as spatial-spectral holograms with acoustooptic deflectors and electrooptic modulators allows a variety of optical architectures to be implemented with substantially enhanced performance and functionality beyond that achievable by these technologies individually We show how to utilize the basic architectures presented here as building blocks of more powerful and complex real-time opticalprocessingsystems.
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