Results 221 to 230 of about 139,792 (264)

Diffraction efficiency evaluation for diamond turning of harmonic diffractive optical elements

Applied Optics, 2020
Single point diamond turning is a commonly used method for manufacturing harmonic diffractive optical elements (HDOEs). Diffraction efficiency of HDOEs is sensitive to surface-relief profile errors, and a half-round tool can reduce the profile error obviously. Furthermore, the diamond tools also create surface roughness errors.
Peng, Zhou, Changxi, Xue, Chao, Yang, Chang, Liu, Xingguo, Liu   +4 more
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Diffraction efficiency of magnetic hologram

IEEE Transactions on Magnetics, 1972
MnBi thin films have been studied as a magneto-optical memory element. Ordinarily, restricted conditions are required for preparing pure MnBi film with excellent properties and homogeneity. However, in the case of Mn-Bi-Te films, it was found that adopting the proper composition made it easy to prepare homogeneous films, and the figure of merit F/α was
M. Tanaka, T. Ito, Y. Nishimura
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Diffraction efficiency of nonsynchronously sampled diffraction gratings

Optical Engineering, 2002
This PDF contains the communication "Diffraction efficiency of nonsynchronously sampled diffraction gratings."
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High diffraction efficiency, broadband, diffraction crystals for use in crystal diffraction lenses

Experimental Astronomy, 2006
A major goal of the MAX program is to detect and measure gamma rays produced following the nuclear reactions that take place in a supernova explosion. To detect a reasonable number of supernovae, sensitivities of the order of a few times 10-7 γ cm-2sec-1 are needed — much better than possible with current instruments. The approach in the MAX program is
Robert K. Smither, Khaliefeh Abu Saleem, Dante E. Roa, Mark A. Beno, Peter Von Ballmoos, Gerry K. Skinner   +5 more
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Holograms of high diffraction efficiency

Soviet Journal of Quantum Electronics, 1972
An experimental study was made of the effects of bleaching on holograms. Optimal bleaching conditions made it possible to achieve a high diffraction efficiency (50%) for a hologram which recorded interference of two plane waves. In the case of a hologram of a transparency, it was important to ensure a satisfactory quality of the reconstructed image ...
V I Bobrinev, V K Kozlova, M A Maiorchuk
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Design of multilayer diffractive optical elements with polychromatic integral diffraction efficiency

Optics Letters, 2010
What we believe to be a new method for designing multilayer diffractive optical elements (MLDOEs) for wideband with consideration of polychromatic integral diffraction efficiency (PIDE) is presented. The benefit of this method is that the maximum PIDE over the entire waveband for MLDOEs can be obtained.
Changxi, Xue, Qingfeng, Cui
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Efficient optimization of diffractive optical elements based on rigorous diffraction models

Journal of the Optical Society of America A, 2001
An efficient optimization strategy for the design of diffractive optical elements that is based on rigorous diffraction theory is described. The optimization algorithm combines diffraction models of different degrees of accuracy and computational complexity.
M E, Testorf, M A, Fiddy
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Effect of assembling errors on the diffraction efficiency for multilayer diffractive optical elements

Applied Optics, 2014
Based on the expression function of diffraction efficiency, and the phase delay function of diffractive optical elements (DOEs), the diffraction efficiency for multilayer diffractive optical elements (MLDOEs) is described with tilt and decenter assembling errors.
Long, Gao, Suet, To, Hongfang, Yang, Xin, Nie, Tianchen, Liu, Changxi, Xue   +5 more
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Diffraction efficiency change of multilayer diffractive optics with environmental temperature

Journal of Optics, 2014
In this paper, the effect of an environmental temperature change on multilayer diffractive optical elements (MLDOEs) is studied in terms of the diffraction efficiency and the polychromatic integral diffraction efficiency (PIDE). The relation between the diffraction efficiency of MLDOEs and environmental temperature is analyzed theoretically, and ...
Mingxu Piao, Qingfeng Cui, Hao Zhu, Changxi Xue, Bo Zhang   +4 more
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Diffraction efficiency of absorption gratings

Optical and Quantum Electronics, 1983
The diffraction efficiency of absorption gratings is investigated using a coupled multiwave analysis. For the four-wave case the analytical expressions for the signal amplitudes are given. The applicability of the four-wave approximation is also included.
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