We present a novel technique for measuring phase modulation in a liquid crystal television (LCTV) panel using the fractional-Talbot effect. We show that the phase modulation property in an LCTV can be obtained by measuring the contrast ratio of the Fresnel diffraction field at one quarter of the Talbot distance. We also generate a multilevel phase grating that produces a Talbot array illuminator to verify the experimental measurement result.

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The robustness of the joint transform correlator (JTC) versus the VanderLugt correlator (VLC) are evaluated based on the transversal and the longitudinal misalignment. We show that the VLC is very sensitive to the transversal misalignment, while the JTC is not. Although the VLC performs better in terms of longitudinal alignment, the tolerable misalignment in recording the joint transform power spectrum (JTPS) is in the order of a millimeter, which can be easily adjusted in practice. In short, we conclude that the JTC is far more robust than the VLC. © 1997 Society of Photo-Optical Instrumentation Engineers. [S0091-3286(97)

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In this paper, a small‐footprint, athermal, hitless, reconfiguration‐optical add‐drop module with an inherently integrated optical power controller is presented. This unique multiplexer cannot only add‐drop any wavelength among designed wavelength channels without interrupting through traffic, but can also dynamically control the output power of an add‐drop channel. © 2003 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 297–300, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10747