Results 241 to 250 of about 1,895,079 (278)
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Applied Optics, 1987
The phase mask distribution of optical sine transformation (OST) has been calculated according to the optical general transformation theory. To avoid the diffraction loss of the phase mask, the optical waveguide method is used. Computation shows that the optical sine transformation is possible with only one phase mask, i.e., one-half of a cylindrical ...
G, Yang +4 more
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The phase mask distribution of optical sine transformation (OST) has been calculated according to the optical general transformation theory. To avoid the diffraction loss of the phase mask, the optical waveguide method is used. Computation shows that the optical sine transformation is possible with only one phase mask, i.e., one-half of a cylindrical ...
G, Yang +4 more
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Applied Optics, 1986
An optical technique is presented for achieving the Hough transform at video rates. Both coherent and incoherent approaches are discussed and analyzed. An incoherent system which combines edge enhancement with the Hough transform is also considered. Use of the optical Hough transform for the location of the bridges and roadways in outdoor scenes and ...
W H, Steier, R K, Shori
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An optical technique is presented for achieving the Hough transform at video rates. Both coherent and incoherent approaches are discussed and analyzed. An incoherent system which combines edge enhancement with the Hough transform is also considered. Use of the optical Hough transform for the location of the bridges and roadways in outdoor scenes and ...
W H, Steier, R K, Shori
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Optical coordinate transformations
Applied Optics, 1992A novel technique for designing holographic optical elements that can perform general types of coordinate transformation is presented. The design is based on analytic ray-tracing techniques for finding the grating vector of the element, from which the holographic grating function is obtained as a solution of a Poissonlike equation. The grating function
N, Davidson, A A, Friesem, E, Hasman
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Adaption of optical Fresnel transform to optical Wigner transform
Physica Scripta, 2010Summary: Enlightened by the algorithmic isomorphism between the rotation of the Wigner distribution function (WDF) and the \(\alpha \)th fractional Fourier transform, we show that the optical Fresnel transform performed on the input through an \(ABCD\) system makes the output naturally adapting to the associated Wigner transform, i.e.
Lv, Cui-Hong, Fan, Hong-Yi
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Proceedings of the IEEE, 1994
The two-dimensional Hartley transform is of particular interest not only as a tool for analysis and processing of images and other two-dimensional functions, but because it can be implemented optically without introducing the phase ambiguities associated with intensity-only observations of Fourier transforms. The Hartley transform property of producing
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The two-dimensional Hartley transform is of particular interest not only as a tool for analysis and processing of images and other two-dimensional functions, but because it can be implemented optically without introducing the phase ambiguities associated with intensity-only observations of Fourier transforms. The Hartley transform property of producing
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Journal of Optics, 2011
Metamaterials are artificial materials with versatile properties that can be tailored to fit almost any practical need and thus go well beyond what can be obtained with `natural' materials. Recent progress in developing optical metamaterials allows unprecedented extreme control over the flow of light at both the nano- and macroscopic scales.
Shalaev, Vladimir M., Pendry, John
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Metamaterials are artificial materials with versatile properties that can be tailored to fit almost any practical need and thus go well beyond what can be obtained with `natural' materials. Recent progress in developing optical metamaterials allows unprecedented extreme control over the flow of light at both the nano- and macroscopic scales.
Shalaev, Vladimir M., Pendry, John
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Optical synthesis of the Hartley transform
Applied Optics, 1985La transformation de Hartley est reelle et offre un accroissement significatif dans la vitesse de calcul des spectres des images et dans le calcul des operations de filtrage des images. Deux configurations optiques possibles ont ete trouvees pour representer la transformation de Hartley d'un ...
R N, Bracewell +3 more
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Fourier-transform optical microsystems
Optics Letters, 1999The design, fabrication, and initial characterization of a miniature single-pass Fourier-transform spectrometer (FTS) that has an optical bench that measures 1 cm x 5 cm x 10 cm is presented. The FTS is predicated on the classic Michelson interferometer design with a moving mirror. Precision translation of the mirror is accomplished by microfabrication
S D, Collins +5 more
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Optical implementation of the Bode transform
Applied Optics, 1995The Bode transformation is a useful tool for determining and analyzing the frequency response of a system. It has a special importance for detecting the resonance frequencies of a linear system that, because of its linearity, can be totally characterized by its impulse response.
Z, Zalevsky, D, Mendlovic
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Mathematics Magazine, 1961
The principals of elementary lense optics, as taught in high school physics, may be formalized as follows: I. An ideal lense a is a line (we deal with a plane diagram, a cross-section) to which corresponds a one-to-one transformation of the class of all lines in the plane into itself, such that every line cutting a is concurrent with its transform and ...
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The principals of elementary lense optics, as taught in high school physics, may be formalized as follows: I. An ideal lense a is a line (we deal with a plane diagram, a cross-section) to which corresponds a one-to-one transformation of the class of all lines in the plane into itself, such that every line cutting a is concurrent with its transform and ...
openaire +1 more source