Reduced size optical coupler for fluorescence detection
First Claim
Patent Images
1. An optical system comprising:
- a first filter adapted to reflect light emitted from a light-emitting diode in a first frequency band to illuminate a fluorescent body, and further adapted to transmit light emitted from the fluorescent body in a second frequency band;
a second filter adapted to separate light transmitted by the first filter by reflecting a signal band light and transmitting a reference band light; and
a single optical connector comprising at least two integral lenses and an inclined surface upon which said first filter is mounted and said second filter is positioned to direct the reflected signal band light through the inclined surface.
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Abstract
Optical systems are disclosed for use in identifying an analyte, such as glucose in blood or interstitial fluid (ISF), using a biomaterial, such as glucose binding protein (GBP), that is brought into contact with the analyte. An optical system includes a first filter adapted to reflect light emitted from a light-emitting diode to illuminate a fluorescent body, and further adapted to transmit light emitted from the fluorescent body, and a second filter adapted to separate light transmitted by the first filter into signal band light and reference band light.
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Citations
20 Claims
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1. An optical system comprising:
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a first filter adapted to reflect light emitted from a light-emitting diode in a first frequency band to illuminate a fluorescent body, and further adapted to transmit light emitted from the fluorescent body in a second frequency band; a second filter adapted to separate light transmitted by the first filter by reflecting a signal band light and transmitting a reference band light; and a single optical connector comprising at least two integral lenses and an inclined surface upon which said first filter is mounted and said second filter is positioned to direct the reflected signal band light through the inclined surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An optical system comprising:
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a first filter adapted to reflect light emitted from a light-emitting diode in a first frequency band to illuminate a fluorescent body, and further adapted to transmit light emitted from the fluorescent body in a second frequency band; a second filter adapted to separate light transmitted by the first filter by reflecting a first beam of light in a signal band and transmitting a second beam of light in a reference band; and a single optical connector comprising at least two integral lenses and an inclined surface upon which said first filter is mounted and said second filter is positioned to direct the first beam of light through the inclined surface, wherein the second filter is adapted to separate light transmitted by the first filter substantially evenly into the first beam and the second beam. - View Dependent Claims (11, 12, 13, 14)
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15. An optical coupler comprising:
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a fiber adapted to contact a fluorescent body; a light-emitting diode; a first filter adapted to reflect light emitted from the light-emitting diode in a first frequency band to illuminate the fluorescent body through the fiber, and further adapted to transmit light emitted from the fluorescent body in a second frequency band; a second filter adapted to separate light transmitted by the first filter by reflecting a signal band light and transmitting a reference band light; a single optical connector comprising at least two integral lenses and an inclined surface upon which said first filter is mounted and said second filter is positioned to direct the reflected signal band light through the inclined surface; and a photodiode adapted to receive at least one selected from the set consisting of signal band light and reference band light transmitted by the second filter. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification