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Formation of star tracking reticlesThe present application is directed towards a process for producing high resolution, substantially non-reflective reticles or choppers suitable for use for transmitting in both the visible and near ultra-violet regions, able to withstand reasonable handling and extreme environmental conditions, and capable of operating at speeds of from 2800 to about 9000 revolutions per minute without distortion. In particular, the present invention is directed towards the production or reticles having a quartz base vacuum coated with chromium, chromium-silver alloy, and silver with electrodeposited copper and black chromium thereon, respectively, in the form of a reticle pattern. The quartz permits the transmission of light while the pattern is opaque to light. The reticles of the present invention are intended for use in optical trackers, such as star trackers used in outer space.
Document ID
19740011895
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Smith, W. O. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Toft, A. R. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 3, 2013
Publication Date
March 26, 1974
Subject Category
General
Report/Patent Number
Patent Application Number: US-PATENT-APPL-SN-244566
Patent Number: US-PATENT-3,799,793
Patent Application Number: US-PATENT-APPL-SN-80029
Patent Number: NASA-CASE-GSC-11188-3
Accession Number
74N20008
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-PATENT-3,799,793|NASA-CASE-GSC-11188-3
Patent Application
US-PATENT-APPL-SN-244566|US-PATENT-APPL-SN-80029

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