The Experts below are selected from a list of 300 Experts worldwide ranked by ideXlab platform
Randy Gee - One of the best experts on this subject based on the ideXlab platform.
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Video Scanning Hartmann Optical Testing of State-of-the-Art Parabolic Trough Concentrators: Preprint
2006Co-Authors: Tim Wendelin, Ken May, Randy GeeAbstract:This paper describes the Video Scanning Hartmann Optical Test System (VSHOT) used to Optically test parabolic trough designs by both Solargenix and Industrial Solar Technology.
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Video Scanning Hartmann Optical Testing of State-of- the-Art Parabolic Trough Concentrators
Solar Energy, 2006Co-Authors: Tim Wendelin, Ken May, Randy GeeAbstract:Significant progress has been made recently in solar parabolic trough technology development and deployment. Part of this success is due to the changing world energy scenario and the recognition that viable renewable energy technologies can play a role in supplying world energy needs. Part is also due to ongoing collaborative efforts by industry and the Department of Energy’s (DOE) Concentrating Solar Power Program (CSP) to enhance the state of the technology in terms of both cost and performance. Currently, there are two trough concentrator projects which the DOE CSP program is supporting. One company, Solargenix, is developing a design to be used in a 64MW plant outside of Boulder City, Nevada. This design is based on the original LUZ LS-2 trough concentrators employed at the Solar Electric Generating Systems (SEGS) plants in Southern California. Another company, Industrial Solar Technology (IST), is working on a scale-up of their design used historically for process heat applications. Very different from the LS-2 approach, this design is still in the research and development stages. One way in which the DOE CSP parabolic trough program assists industry is by providing Optical Testing and qualification of their concentrator designs. This paper describes the Video Scanning Hartmann Optical Test System (VSHOT) used to Optically test both of these designs. The paper also presents the results of tests performed in the past year and what impact the Testing has had on the developmental direction of each design.
Alejandro Cornejo-rodriguez - One of the best experts on this subject based on the ideXlab platform.
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A review on self-reference wavefront methods in Optical Testing
8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics Lasers and Applications, 2013Co-Authors: Alejandro Cornejo-rodriguez, Fermín Granados-agustínAbstract:For the Testing of components and Optical systems, there are diverse methods with different characteristics each one; in the presentation will be done a review of some of them, that can be classified as Optical Testing techniques, using a self-reference wavefront. Some examples are the lateral shearing interferometers (Bates, Ronchi, Murty), point diffraction interferometer (Linnik), Burch’s scattering interferometer, and the knife edge interferometer. Some advantages of such self-reference methods is the fact that are not necessary Optical reference surfaces; and usually the light interfering beams have common paths, that implies that the set up is not affected by environment vibrations and other effects.
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Physical theory of Ronchi-grams unequal strip-widths rulings
2004Co-Authors: Noel-ivan Toto-arellano, Gustavo Rodriguez Zurita, Alejandro Cornejo-rodriguezAbstract:In this paper we inspect some further properties of diffraction Ronchi rulings and its effects in Ronchigrams. Our considerations are based on the physical theory of gratings with different strip-widths geometry. Under scope are absorptive gratings, phase gratings and mixed gratings. The presented analysis and respective results are illustrated here with the use of an advanced mathematics software pack. Some possible applications in Optical Testing, imaging processing and nanolithography are considered.
Tim Wendelin - One of the best experts on this subject based on the ideXlab platform.
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Video Scanning Hartmann Optical Testing of State-of-the-Art Parabolic Trough Concentrators: Preprint
2006Co-Authors: Tim Wendelin, Ken May, Randy GeeAbstract:This paper describes the Video Scanning Hartmann Optical Test System (VSHOT) used to Optically test parabolic trough designs by both Solargenix and Industrial Solar Technology.
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Video Scanning Hartmann Optical Testing of State-of- the-Art Parabolic Trough Concentrators
Solar Energy, 2006Co-Authors: Tim Wendelin, Ken May, Randy GeeAbstract:Significant progress has been made recently in solar parabolic trough technology development and deployment. Part of this success is due to the changing world energy scenario and the recognition that viable renewable energy technologies can play a role in supplying world energy needs. Part is also due to ongoing collaborative efforts by industry and the Department of Energy’s (DOE) Concentrating Solar Power Program (CSP) to enhance the state of the technology in terms of both cost and performance. Currently, there are two trough concentrator projects which the DOE CSP program is supporting. One company, Solargenix, is developing a design to be used in a 64MW plant outside of Boulder City, Nevada. This design is based on the original LUZ LS-2 trough concentrators employed at the Solar Electric Generating Systems (SEGS) plants in Southern California. Another company, Industrial Solar Technology (IST), is working on a scale-up of their design used historically for process heat applications. Very different from the LS-2 approach, this design is still in the research and development stages. One way in which the DOE CSP parabolic trough program assists industry is by providing Optical Testing and qualification of their concentrator designs. This paper describes the Video Scanning Hartmann Optical Test System (VSHOT) used to Optically test both of these designs. The paper also presents the results of tests performed in the past year and what impact the Testing has had on the developmental direction of each design.
Pengqian Yang - One of the best experts on this subject based on the ideXlab platform.
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single shot curvature sensing with non coaxial fibonacci sieve filter in telescope
Applied Physics Letters, 2019Co-Authors: Xiuping Zhang, Yingge Zhang, Junyong Zhang, Pengqian YangAbstract:Wavefront curvature sensing is considered a promising method for measuring wavefront aberrations, which has widespread applications ranging from adaptive optics to Optical Testing. Here, a single-shot curvature sensing with a noncoaxial Fibonacci-sieve filter in the telescope was proposed to reconstruct the wavefront distribution of tiny transmissive objects fabricated on a chrome plate. A noncoaxial Fibonacci-sieve filter in the telescope was designed to realize simultaneously triplanar diffraction patterns at a recording plane; thus, the wavefront can be quantitatively retrieved by a single exposure. A trifocal Fibonacci sieve was fabricated, and its feasibility was verified in the Optical region experimentally. With the advantages of simple operation in real-time and reducing the effects of vibration, this method makes it possible to be applied to various imaging and detection techniques, especially for biological imaging and wavefront detection.
Alejandro Cornejo Rodriguez - One of the best experts on this subject based on the ideXlab platform.
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Physical theory of ronchigrams resulting from unequal strip-widths rulings
Eighth International Symposium on Laser Metrology, 2005Co-Authors: Noel Ivan Toto Arellano, Gustavo Rodriguez Zurita, Alejandro Cornejo RodriguezAbstract:In this paper we extend previous studies to further diffraction properties of Ronchi rulings. Our considerations are based on the physical theory of gratings with different strip-widths geometry. Under scope are absorptive gratings, phase gratings and mixed gratings. The case of gratings with diverse structures is also considered. In particular, gratings of phase with absorption (mixed gratings) are considered by means of the observed diffraction properties for absorption rulings as it is described in the work. Ronchigrams resulting for different grating parameters and different values from primary aberrations are shown. Some experimental results of Ronchi rulings for diverse structures are including. This study can be used not only for Optical Testing, but also for gratings of light for diffraction of atoms or to describe diffraction effects of micro-gratings.
