FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W744463071> ?p ?o ?g. }

• W744463071 abstract "Three device improvements have been developed that dramatically enhance the contrast ratio of microshutters. The goal of a microshutter is to allow as much light through as possible when the shutters are in the open configuration, and preventing any light from passing through when they are in the closed position. The ratio of the transmitted light that is blocked is defined here as the contrast ratio. Three major components contribute to the improved performance of these microshutters: 1. The precise implementation of light shields, which protect the gap around the shutters so no light can leak through. It has been ascertained that without the light shield there would be a gap on the order of 1 percent of the shutter area, limiting the contrast to a maximum of 100. 2. The precise coating of the interior wall of each microshutter was improved with an insulator and metal using an angle deposition technique. The coating prevents any infrared light that finds an entrance on the surface of the microshutter cell from being emitted from a sidewall. Since silicon is in effect transparent to any light with a wavelength longer than .1 micrometer, these coatings are essential to blocking any stray signals when the shutters are closed. 3. A thin film of molybdenum nitride (MoN) was integrated onto the surface of the microshutter blade. This film provides the majority of light blockage over the microshutter and also ensures that the shutter can be operated over a wide temperature range by maintaining its flatness. These improvements were motivated by the requirements dictated by the James Webb Space Telescope NIRSpec instrument. The science goals of the NIRSpec require observing some of the very faintest objects in a given field of view that also may contain some very bright objects. To observe the faint objects, the light from the bright objects - which could be thousands of times brighter - must be completely blocked. If a closed microshutter is even slightly transmissive, a very bright object will still transmit a small signal, which can be larger than a signal from a very faint object transmitted through an open shutter. Since this situation can completely corrupt the results, it was necessary that the closed shutters be able to attenuate light by at least a factor of 2,000. There currently exist four flight-quality microshutter arrays that have been fully or are currently undergoing testing and the results support that the three improvements described above have successfully led to contrast levels greater than 50,000 in over 99 percent of the microshutters at an operating temperature of 35 K. Applications for these high-contrast microshutters are in the photomask generation and stepper equipment used to make integrated circuits and microelectromechanical (MEMS) devices. Since microshutters are a reconfigurable optical element, their versatility in these industries provides an improvement over printed masks and fixed projection alignment systems." @default.
• W744463071 created "2016-06-24" @default.
• W744463071 creator A5015853545 @default.
• W744463071 creator A5040573704 @default.
• W744463071 creator A5056166324 @default.
• W744463071 creator A5063709389 @default.
• W744463071 creator A5063990903 @default.
• W744463071 creator A5066446964 @default.
• W744463071 date "2009-09-01" @default.
• W744463071 modified "2023-09-23" @default.
• W744463071 title "Improving the Visible and Infrared Contrast Ratio of Microshutter Arrays" @default.
• W744463071 hasPublicationYear "2009" @default.
• W744463071 type Work @default.
• W744463071 sameAs 744463071 @default.
• W744463071 citedByCount "0" @default.
• W744463071 crossrefType "journal-article" @default.
• W744463071 hasAuthorship W744463071A5015853545 @default.
• W744463071 hasAuthorship W744463071A5040573704 @default.
• W744463071 hasAuthorship W744463071A5056166324 @default.
• W744463071 hasAuthorship W744463071A5063709389 @default.
• W744463071 hasAuthorship W744463071A5063990903 @default.
• W744463071 hasAuthorship W744463071A5066446964 @default.
• W744463071 hasConcept C104663316 @default.
• W744463071 hasConcept C120665830 @default.
• W744463071 hasConcept C121332964 @default.
• W744463071 hasConcept C132447839 @default.
• W744463071 hasConcept C144028864 @default.
• W744463071 hasConcept C158355884 @default.
• W744463071 hasConcept C171250308 @default.
• W744463071 hasConcept C171635847 @default.
• W744463071 hasConcept C182610534 @default.
• W744463071 hasConcept C192562407 @default.
• W744463071 hasConcept C2776871301 @default.
• W744463071 hasConcept C2781448156 @default.
• W744463071 hasConcept C49040817 @default.
• W744463071 hasConceptScore W744463071C104663316 @default.
• W744463071 hasConceptScore W744463071C120665830 @default.
• W744463071 hasConceptScore W744463071C121332964 @default.
• W744463071 hasConceptScore W744463071C132447839 @default.
• W744463071 hasConceptScore W744463071C144028864 @default.
• W744463071 hasConceptScore W744463071C158355884 @default.
• W744463071 hasConceptScore W744463071C171250308 @default.
• W744463071 hasConceptScore W744463071C171635847 @default.
• W744463071 hasConceptScore W744463071C182610534 @default.
• W744463071 hasConceptScore W744463071C192562407 @default.
• W744463071 hasConceptScore W744463071C2776871301 @default.
• W744463071 hasConceptScore W744463071C2781448156 @default.
• W744463071 hasConceptScore W744463071C49040817 @default.
• W744463071 hasLocation W7444630711 @default.
• W744463071 hasOpenAccess W744463071 @default.
• W744463071 hasPrimaryLocation W7444630711 @default.
• W744463071 hasRelatedWork W1991768860 @default.
• W744463071 hasRelatedWork W2016354312 @default.
• W744463071 hasRelatedWork W2019505782 @default.
• W744463071 hasRelatedWork W2025155455 @default.
• W744463071 hasRelatedWork W2076440966 @default.
• W744463071 hasRelatedWork W2088083520 @default.
• W744463071 hasRelatedWork W2099391127 @default.
• W744463071 hasRelatedWork W2335735532 @default.
• W744463071 hasRelatedWork W2497254463 @default.
• W744463071 hasRelatedWork W266246034 @default.
• W744463071 hasRelatedWork W2919673387 @default.
• W744463071 hasRelatedWork W397934418 @default.
• W744463071 hasRelatedWork W781732094 @default.
• W744463071 hasRelatedWork W794595907 @default.
• W744463071 hasRelatedWork W826489027 @default.
• W744463071 hasRelatedWork W86474475 @default.
• W744463071 hasRelatedWork W1715102346 @default.
• W744463071 hasRelatedWork W2413365815 @default.
• W744463071 hasRelatedWork W2878835772 @default.
• W744463071 hasRelatedWork W3147842692 @default.
• W744463071 isParatext "false" @default.
• W744463071 isRetracted "false" @default.
• W744463071 magId "744463071" @default.
• W744463071 workType "article" @default.