Results 141 to 150 of about 622,419 (187)
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Limited Angle Optical Tomography
SPIE Proceedings, 1987A non destructive optical technique for testing transparent media is applied to the study of concentration change in a supersaturated solution near a growing crystal.
P. Boccacci, L. Zefiro
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LIMITING PRECISION IN OPTICAL INTERFEROMETRY
Canadian Journal of Physics, 1959The fundamental limit to the precision of setting on a fringe peak due to photon noise is evaluated for a certain class of interferometric methods in terms of parameters characterizing the source, the interferometer, and the detector. It is shown that changes in path difference of 10−10 should be detectable with an observing time of 1 second, using ...
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Broadband thermal optical limiter
Applied Physics Letters, 1993The limiting behavior of nigrosin dye dissolved in carbon disulfide was investigated in an f/5 defocusing geometry using 6 ns duration 532 nm laser excitation. Nigrosin dye is a broadband visible light absorber that is used here in conjunction with the large thermal nonlinearity of carbon disulfide solvent to defocus intense incident visible light.
B. L. Justus +2 more
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NANOMATERIALS AS OPTICAL LIMITERS
Journal of Nonlinear Optical Physics & Materials, 2000Optical limiters based on several different classes of nanomaterials are reviewed. The systems under consideration include metal and semiconductor nanoparticles and nanoscale carbon materials. For the latter, the optical limiting properties of carbon nanoparticles, fullerenes, and suspended and solubilized carbon nanotubes are summarized and compared.
YA-PING SUN +3 more
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Bottleneck optical pulse limiters revisited
Applied Optics, 1999Analytic expressions are presented for the fluence dependence of the populations of pulse-excited singlet and triplet states of metallo-organic molecules appropriate for the design of passive optical limiters in which the molecular density profile along the axis of a convergent beam is graded to avoid damage at high design fluences.
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1974 International Electron Devices Meeting (IEDM), 1974
This paper describes a new theoretical and experimental approach to understanding optical lithography. Optical absorption properties of positive photoresist are used in the determination of an exposure distribution within the resist. A development rate relationship is used to calculate developed image surface contours from the exposure distribution ...
F. H. Dill +2 more
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This paper describes a new theoretical and experimental approach to understanding optical lithography. Optical absorption properties of positive photoresist are used in the determination of an exposure distribution within the resist. A development rate relationship is used to calculate developed image surface contours from the exposure distribution ...
F. H. Dill +2 more
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Frontiers in Optics, 2006
In this paper we demonstrate the design of a MEMS-deformable-mirror based optical limiter which deflects parabolicaly. Conversion of membrane deflection into intensity is described. The operating theory of this optical limiter device has been developed.
J. Khoury +5 more
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In this paper we demonstrate the design of a MEMS-deformable-mirror based optical limiter which deflects parabolicaly. Conversion of membrane deflection into intensity is described. The operating theory of this optical limiter device has been developed.
J. Khoury +5 more
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IEEE Journal of Quantum Electronics, 1985
We have used two-photon absorption, self-defocusing, and optically-induced melting in GaAs to limit 1 μm picosecond pulsed radiation. The contribution to the limiting action from each of these mechanisms is discussed and demonstrated. Additionally, we measure a two-photon absorption coefficient of 26 cm/GW, which is in good agreement with the smallest ...
T. Boggess +4 more
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We have used two-photon absorption, self-defocusing, and optically-induced melting in GaAs to limit 1 μm picosecond pulsed radiation. The contribution to the limiting action from each of these mechanisms is discussed and demonstrated. Additionally, we measure a two-photon absorption coefficient of 26 cm/GW, which is in good agreement with the smallest ...
T. Boggess +4 more
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Diffraction-limited large X-ray optics
Journal of X-Ray Science and Technology, 1994It is shown that the technologies required to produce large normal-incidence multilayer x-ray mirrors with diffraction-limited resolution are now available. Applications of these mirrors in x-ray astronomy and x-ray lithography are discussed.
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Quantum limited optical tracking
1979 18th IEEE Conference on Decision and Control including the Symposium on Adaptive Processes, 1979Most optical tracking algorithms are based upon a set of intensity measurements from an array of discrete dectector elements. However, as technology progresses, the number of possible detector elements per unit will increase so that in the limit it is reasonable to consider a spatially distributed measurement.
Stanley Robinson, Donald Synder
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