Results 241 to 250 of about 26,366,925 (292)
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SPIE Proceedings, 1991
The Space Infrared Telescope Facility (SIRTF) is a 1-meter cryogenic infrared telescope. Stray light is kept below the natural background by restrictions on sun, Earth, and moon off-axis angles; by conservative baffle design; by the use of advanced diffuse black coatings; and by superfluid helium cooling.
David G. Elliott, Ann S. C. Dinger
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The Space Infrared Telescope Facility (SIRTF) is a 1-meter cryogenic infrared telescope. Stray light is kept below the natural background by restrictions on sun, Earth, and moon off-axis angles; by conservative baffle design; by the use of advanced diffuse black coatings; and by superfluid helium cooling.
David G. Elliott, Ann S. C. Dinger
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Stray light analysis of CRISTA
SPIE Proceedings, 1990The CRISTA experiment is designed to detect and analyze short term upper atmospheric waves and turbulence of the middle atmosphere. This paper presents two of the more intriguing stray light characteristics of the CRISTA instrument as revealed through a much more extensive stray light analysis.
Robert P. Breault, Peter Barthol
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Stray-light analysis for the SCORE coronagraphs of HERSCHEL
Applied Optics, 2006The HERSCHEL (Helium Resonance Scattering in the Corona and Heliosphere) suborbital mission scientific payload consists of two extreme ultraviolet (EUV) coronagraphs forming the SCORE (Sounding Coronagraph Experiment) and an EUV Sun disk imager. The mission will be of great importance for the investigation of solar wind dynamics by obtaining the first ...
F. Landini +3 more
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Stray light analysis of a space patrol
SPIE Proceedings, 2012The stray light of a space patrol is analyzed in this paper. The space patrol is used to observe the Earth in space. In the paper the definitions of stray lights in the optical system are introduced and the stray lights are classified based on their sources.
Li Lin, Huiyi Chen
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Deterministic sequential stray light analysis
SPIE Proceedings, 2010Non-sequential ray tracing for stray light analyses have demonstrated value, but are over-constrained when high sampling and speed are both needed. In cases where real geometry and mechanical surface properties are critical, such analyses are certainly required. But the goal of these analyses is often to attempt to approach the performance that would
Michael G. Dittman +2 more
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Stray light and tolerance analysis of an ultrathin waveguide display
Applied Optics, 2015Waveguides are becoming increasingly popular in the field of near-eye display because of their low thickness and light weight. However, ghost stray light generated in the waveguide and the double-image problem caused by low parallelism precision seriously degrade the display quality.
Qiwei, Wang +4 more
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Stray light design and analysis of the SNAP Telescope
SPIE Proceedings, 2007SNAP is a proposed space-based experiment designed to quantify dark energy by measuring the redshift-magnitude diagram of supernovae and to quantify the growth of structure in the universe by measuring weak gravitational lensing over cosmological distances. The baseline SNAP telescope is an ambient temperature three-mirror anastigmat (TMA). The goal
M. J. Sholl +5 more
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Stray light analysis of the Formosat-5 telescope
SPIE Proceedings, 2012Stray light analysis of FormoSat-5 telescope has been studied. The geometric contour profiles of the baffles are determined by checking the degree of blocked direct-incidence stray light. Trade-off between different baffle contours has been made by comparing the direct-incidence stray light, incident energy ratio, and incident energy uniformity of ...
Ting-Ming Huang +4 more
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Modeling particle distributions for stray light analysis
SPIE Proceedings, 2006There has been a general awareness for several years that the IEST-STD-CC1246 standard particle distribution with a slope of -0.926 does not reasonably represent the contamination on optics that have not been recently cleaned. As a result, the CL (Cleanliness Level) nomenclature actually counters effective communication and modeling of particulate ...
John Fleming +4 more
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Stray light analysis of diamond-turned image slicers
Optical Engineering, 2023We describe the process through which stray light analysis should be performed in optical systems involving image slicers. We detail how scattering models should be used depending on how the image slicer assembly will be fabricated. Our work describes how to determine all ray paths, compute cross-talk on the pupil mirrors due to scattering, quantify ...
Tristan Chabot +2 more
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