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Strain gauge ambiguity sensor for segmented mirror active optical systemA system is described to measure alignment between interfacing edges of mirror segments positioned to form a segmented mirror surface. It serves as a gauge having a bending beam with four piezoresistive elements coupled across the interfaces of the edges of adjacent mirror segments. The bending beam has a first position corresponding to alignment of the edges of adjacent mirror segments, and it is bendable from the first position in a direction and to a degree dependent upon the relative misalignment between the edges of adjacent mirror segments to correspondingly vary the resistance of the strain guage. A source of power and an amplifier are connected in circuit with the strain gauge whereby the output of the amplifier varies according to the misalignment of the edges of adjacent mirror segments.
Document ID
19750004201
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Wyman, C. L. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Howe, T. L. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
September 3, 2013
Publication Date
October 22, 1974
Subject Category
Instrumentation And Photography
Report/Patent Number
Patent Number: NASA-CASE-MFS-20506-1
Patent Application Number: US-PATENT-APPL-SN-328792
Patent Number: US-PATENT-3,842,509
Accession Number
75N12273
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
NASA-CASE-MFS-20506-1|US-PATENT-3,842,509
Patent Application
US-PATENT-APPL-SN-328792

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