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Title: Retroreflective systems for remote readout

Abstract

A sensing device is described for sensing an environmental factor. The device includes a retroreflective layer disposed in a parallel, facing relationship with a sensing layer. The sensing layer has an initial optical absorption capacity for (1) sensing a presence of an environmental factor, (2) experiencing a change in optical absorption capacity responsive to said environmental factor, and (3) transmitting and attenuating light. A first portion of the sensing layer is sealed off from exposure to the environment while a second portion remains exposed to the environment such that, when the environmental factor is present, the first portion of the sensing layer is prevented from experiencing a change in optical absorption capacity responsive to said environmental factor. Well-collimated light beams are passed through the sensing layer and are reflected back from the retroreflective layer for processing. When the environmental factor is present, the beams which pass through the second portion are attenuated responsive to an increase in optical absorption capacity and are compared with the non-attenuated beams passing through the first portion to calculate the presence and quantity of the environmental factor. 7 figs.

Inventors:
; ;
Issue Date:
Research Org.:
Lockheed Martin Idaho Tech Co
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
675808
Patent Number(s):
5,822,074
Application Number:
PAN: 8-804,995
Assignee:
Lockheed Martin Idaho Technologies Co., Idaho Falls, ID (United States) PTO; SCA: 540120; PA: EDB-99:003314; SN: 98002028007
DOE Contract Number:  
AC07-94ID13223
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 13 Oct 1998
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; AIR POLLUTION MONITORS; REFLECTIVE COATINGS; ABSORPTION; RESPONSE FUNCTIONS; DESIGN; OPERATION; LIGHT TRANSMISSION; ATTENUATION

Citation Formats

Deason, V.A., Colwell, F.S., and Ricks, K.L. Retroreflective systems for remote readout. United States: N. p., 1998. Web.
Deason, V.A., Colwell, F.S., & Ricks, K.L. Retroreflective systems for remote readout. United States.
Deason, V.A., Colwell, F.S., and Ricks, K.L. Tue . "Retroreflective systems for remote readout". United States.
@article{osti_675808,
title = {Retroreflective systems for remote readout},
author = {Deason, V.A. and Colwell, F.S. and Ricks, K.L.},
abstractNote = {A sensing device is described for sensing an environmental factor. The device includes a retroreflective layer disposed in a parallel, facing relationship with a sensing layer. The sensing layer has an initial optical absorption capacity for (1) sensing a presence of an environmental factor, (2) experiencing a change in optical absorption capacity responsive to said environmental factor, and (3) transmitting and attenuating light. A first portion of the sensing layer is sealed off from exposure to the environment while a second portion remains exposed to the environment such that, when the environmental factor is present, the first portion of the sensing layer is prevented from experiencing a change in optical absorption capacity responsive to said environmental factor. Well-collimated light beams are passed through the sensing layer and are reflected back from the retroreflective layer for processing. When the environmental factor is present, the beams which pass through the second portion are attenuated responsive to an increase in optical absorption capacity and are compared with the non-attenuated beams passing through the first portion to calculate the presence and quantity of the environmental factor. 7 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {10}
}