CASI has shown that scatter measurements can be made in single sweeps from specular to near grazing angles with over 12 orders of magnitude in the resulting BSDF curves. The measurements may be taken at several differ...
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Extraction of empirical water droplet impingement characteristics from records of wind tunnel dye-tracer experiments has been an extremely time consuming process in the past. Described are a method for extracting impi...
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Numerical analysis and simulation of a technique for automatic alignment of a three-mirror off-axis telescope were carried out using a method of reverse optimization and end-to-end measurements. The techniques uses Ha...
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The proceedings contain 56 papers. The topics discussed include: phase unwrapping by regions;nonlinear characteristics of a stylus profilometer;design review of a unique complete angle scatter instrument (CASI);compar...
The proceedings contain 56 papers. The topics discussed include: phase unwrapping by regions;nonlinear characteristics of a stylus profilometer;design review of a unique complete angle scatter instrument (CASI);comparison of scatter data from various beam dumps;practical reduction of instrument signature in near specular light scatter measurements;quantitative characterization of rough Si02 surfaces by infrared ellipsometry;comparison of scatter data from various beam dumps;practical reduction of instrument signature in near specular light scatter measurements;comparison of BRDF data from two scatterometers;and comparison of scatter from diamond turned optics to commliticnally formed optics in the visible wavelengths.
The proceedings contain 37 papers. The topics discussed include: thermochromic materials research for optical switching;some perspectives on electrochromic device research;current status of photovoltaic research at SE...
The proceedings contain 37 papers. The topics discussed include: thermochromic materials research for optical switching;some perspectives on electrochromic device research;current status of photovoltaic research at SERI;a model for light scattering by rough tin oxide;tin oxide antireflection coating for polycrystalline silicon solar cell;holographic solar concentrator;holographic lighting for energy efficient greenhouses;development of holographic notch filters and filter stacks for specific spectral transmission;designing for specific diffraction criteria by accounting for non-ideal aspects in holographic recording materials;design considerations for long-lived glass mirrors for space;and the effect of the size of structural bulk inhomogeneities on the specular transmittance of polymer films.
currentdevelopments in thermal imaging in the 8-12 micron waveband are towards improving spatial and radiometric resolution. However, they will not reduce the initial or whole life cost. To significantly reduce costs...
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currentdevelopments in thermal imaging in the 8-12 micron waveband are towards improving spatial and radiometric resolution. However, they will not reduce the initial or whole life cost. To significantly reduce costs the overall size must be reduced and significant savings made in three critical areas;detectors, cooling and optics. 3-5 micron quantum detection using a parallel or serial parallel scan is investigated which reduces cost in these areas by using inherently cheaper detectors with thermo electric cooling and low cost optics optimized for diamond machining using a reflecting single field of view telescope.
A slow-scan, cooled CCD camera system, similar to that used for astronomical observations, was constructed at Toulouse Observatory and used for testing CCD chips. Several devices were tested extensively. This paper de...
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A slow-scan, cooled CCD camera system, similar to that used for astronomical observations, was constructed at Toulouse Observatory and used for testing CCD chips. Several devices were tested extensively. This paper describes the design and performance of some Thomson-CSF solid-state area-array CCD sensors. These sensors use a frame-transfer organization adapted to operate in a double-interlaced-field readout mode with a memory zone (sensor TH 7861) or adapted to operate in a single-field mode without a memory zone (sensors TH 7882, TH 7883, TH 7884). We briefly describe the system and the evaluation of the photometric performance of these chips, including quantum efficiency, readout noise, transfer efficiency, linearity, dark current, and field uniformity. Some projected developments of Thomson-CSF chips for scientific applications, such as the TH X31156 (1024 X1024 pixels) and the buttable TH 7882 (TH X31157), are also presented.
This conference proceedings contains 26 papers covering the following major subjects: opticaldesign, opticalengineering and manufacturing optical systems and their applications and diffraction phenomena.
ISBN:
(纸本)0892527145
This conference proceedings contains 26 papers covering the following major subjects: opticaldesign, opticalengineering and manufacturing optical systems and their applications and diffraction phenomena.
Many papers have been written on the design of gradient-index optical systems. The purpose of this paper is to review current technology in gradient-index materials research and to review the types of materials that a...
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ISBN:
(纸本)0892527145
Many papers have been written on the design of gradient-index optical systems. The purpose of this paper is to review current technology in gradient-index materials research and to review the types of materials that are currently available. These include glass, materials made by ion exchange, chemical vapor deposition, sol-gel, and phase-separated techniques, gradient-index germanium, zinc-selenide/zinc sulfide, and gradients in plastics.
A null-lens design approach for centrally obscured components is described. This optimization method, which explicitly takes advantage of the obscuration, can achieve improved wavefront quality of the null test for a ...
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ISBN:
(纸本)0892527145
A null-lens design approach for centrally obscured components is described. This optimization method, which explicitly takes advantage of the obscuration, can achieve improved wavefront quality of the null test for a given level of lens complexity than a design approach that does not take advantage of the obscuration. The fabricated aspheric part, while likely to be different in shape from that predicted by the null test by a constant phase factor, will still allow satisfactory performance of the system.
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