Optical sensor for monitoring the partial pressure of oxygen
First Claim
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1. A device for monitoring oxygen in an environmental in response to light transmitted from a light source comprising:
- an optical waveguide to receive light transmitted from the light source; and
a coating of oxygen-sensitive medium disposed on said waveguide wherein said sensitive medium fluoresces in response to light from said light source, the intensity of fluorescence of said sensitive medium being dependent on the partial pressure of oxygen present in the environment being monitored, said sensitive-medium including an inorganic oxygen-sensitive fluorescent dye in a plasticized polymer matrix.
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Abstract
A device is described for sensing oxygen, particularly for use in medical applications. The device includes an optical waveguide and an oxygen sensing medium disposed on the waveguide. The sensing medium fluoresces in response to light from a light source such that the intensity of fluorescence is dependent on the partial pressure of oxygen in the environment. The sensing medium includes an oxygen sensitive fluorescent dye in a matrix consisting of a plasticized polymer.
141 Citations
25 Claims
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1. A device for monitoring oxygen in an environmental in response to light transmitted from a light source comprising:
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an optical waveguide to receive light transmitted from the light source; and a coating of oxygen-sensitive medium disposed on said waveguide wherein said sensitive medium fluoresces in response to light from said light source, the intensity of fluorescence of said sensitive medium being dependent on the partial pressure of oxygen present in the environment being monitored, said sensitive-medium including an inorganic oxygen-sensitive fluorescent dye in a plasticized polymer matrix. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A device for monitoring oxygen as comprising:
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an acrylic optical fiber, having a generally cylindrical core surrounded by a cladding, said fiber having first and second ends, said first end terminating in an acute angle of between about twenty degrees and about thirty degrees to expose an elongated portion of said core; and an oxygen-sensing medium composed of tris (4,7-diphenyl-1,10-phenanthroline) (RuII) perchlorate dye in a matrix of polyvinyl chloride and didecyl phthalate, said matrix consisting of fifty-weight-percent didecyl phthalate, said matrix being saturated with said dye, said oxygen sensing medium being disposed on said exposed portion of said core. - View Dependent Claims (20)
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21. A method for forming an oxygen sensor comprising the steps of:
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immersing an elongated portion of an exposed optical fiber core in an oxygen sensing medium dissolved in a volatile solvent, said solvent being unable to dissolve said fiber, and said elongated portion terminating in an acute angle of less than about sixty degrees; and allowing said solvent to evaporate to cause said oxygen sensing medium to dry to a solid phase. - View Dependent Claims (22)
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23. A device for monitoring oxygen in an environment in response to light transmitted from a light source comprising:
a fiber-optic waveguide having a core surrounded by a cladding and having first and second ends, said light source being disposed at said second end of said waveguide, said first end of said waveguide terminating in an acute angle exposing an elongated portion of said core, said oxygen sensing medium being disposed on said elongated portion of said core. - View Dependent Claims (24, 25)
Specification