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Optical humidity sensor

Patent ·
OSTI ID:866135
 [1]
  1. Ann Arbor, MI
+ Show Author Affiliations
An optical dielectric humidity sensor 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.
Research Organization:
KMS Fusion Inc
DOE Contract Number:
AC02-84ER80144
Assignee:
KMS Fusion, Inc. (Ann Arbor, MI)
Patent Number(s):
US 4641524
OSTI ID:
866135
Country of Publication:
United States
Language:
English

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Related Subjects

/73/
alternating
alternating layers
atmosphere
carried
detectors
dielectric
dielectric material
dielectric materials
dielectric mirror
differing
direct
energies
energy
energy transmitted
function
humidity
humidity sensor
incident
indicates
indices
layers
light
light energy
light source
materials
mirror
multiple
narrow-band
optical
optical dielectric
polarized
polarized light
porous
positioned
ratio
ratiometer
receive
receive light
reflected
refraction
sensor
source
substrate
surrounds
translucent
transmitted
water-adsorbent