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Document MonitorThe charters of Freedom Monitoring System will periodically assess the physical condition of the U.S. Constitution, Declaration of Independence and Bill of Rights. Although protected in helium filled glass cases, the documents are subject to damage from light vibration and humidity. The photometer is a CCD detector used as the electronic film for the camera system's scanning camera which mechanically scans the document line by line and acquires a series of images, each representing a one square inch portion of the document. Perkin-Elmer Corporation's photometer is capable of detecting changes in contrast, shape or other indicators of degradation with 5 to 10 times the sensitivity of the human eye. A Vicom image processing computer receives the data from the photometer stores it and manipulates it, allowing comparison of electronic images over time to detect changes.
Document ID
20020086705
Acquisition Source
Jet Propulsion Laboratory
Document Type
Other
Date Acquired
August 20, 2013
Publication Date
January 1, 1988
Publication Information
Publication: Spinoff 1988
Subject Category
Documentation And Information Science
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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