Optical humidity sensor

Patent · Tue Feb 10 00:00:00 EST 1987

OSTI ID:7243577

Tarvin, J A

An optical dielectric humidity sensor is disclosed which includes a dielectric mirror having multiple alternating layers of two porous water-adsorbent dielectric materials with differing indices of refraction carried by a translucent substrate. A narrow-band polarized light source is positioned to direct light energy onto the mirror, and detectors are positioned to receive light energy transmitted through and reflected by the mirror. A ratiometer indicates humidity in the atmosphere which surrounds the dielectric mirror as a function of a ratio of light energies incident on the detectors. 2 figs.

• Research Organization: KMS Fusion Inc
• DOE Contract Number: AC02-84ER80144
• Assignee: KMS Fusion, Inc., Ann Arbor, MI (United States)
• Patent Number(s): US 4641524; A
• Application Number: PPN: US 6-765727
• OSTI ID: 7243577
• Resource Relation: Patent File Date: 15 Aug 1985
• Country of Publication: United States
• Language: English

Related Subjects

47 OTHER INSTRUMENTATION
MOISTURE GAGES
DESIGN
DIELECTRIC MATERIALS
LIGHT SOURCES
MEASURING METHODS
POROUS MATERIALS
REFRACTIVE INDEX
MATERIALS
MEASURING INSTRUMENTS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RADIATION SOURCES
440800* - Miscellaneous Instrumentation- (1990-)