Terahertz dispersive spectrometer system
First Claim
1. A non-imaging dispersive spectrometer system comprising:
- a terahertz radiation source for illuminating a target;
a slit aperture;
fore-optics configured to focus incident radiation reflected or emanated from the target to the slit aperturea dispersive element;
secondary optics configured to collimate the radiation from the slit aperture to the dispersive element; and
one or more thermoelectric terahertz detectors in an optical path from the dispersive element, the one or more detectors each comprising an uncooled, thermally isolated sensor and a micro antenna connected to the uncooled sensor;
wherein the one or more detectors are arranged according to their optimal sensitivity in a spectral range of interest as defined by the dispersive range of the dispersive element and the one or more detectors form a linear array; and
wherein the thermally isolated sensor of the one or more thermoelectric terahertz detectors comprises;
a microbridge, the microbridge comprising;
a first dielectric layer;
a first metal layer extending from a mid-portion of the microbridge to a first antenna contact pad;
a second metal layer extending from the mid-portion of the microbridge to a second antenna contact pad and overlapping a portion of the first metal layer; and
a second dielectric layer disposed over the first metal layer and a second metal layer.
1 Assignment
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Accused Products
Abstract
A spectrometer system for providing information about a target with terahertz radiation. The system may receive incident radiation from the target through fore optics, a slit aperture, secondary optics and a dispersive element which images a slit on an array of terahertz sensitive detectors. The detectors may include uncooled sensors. Each sensor may be connected to its own micro antenna. The array of detectors may be situated proximate to the dispersive element so that radiation from the element may be dispersed according to wavelength to the respective detectors optimally sensitive to the various respective wavelengths. Detector signals indicating the impingement of terahertz radiation may provide information for identifying a material of the target.
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Citations
10 Claims
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1. A non-imaging dispersive spectrometer system comprising:
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a terahertz radiation source for illuminating a target; a slit aperture; fore-optics configured to focus incident radiation reflected or emanated from the target to the slit aperture a dispersive element; secondary optics configured to collimate the radiation from the slit aperture to the dispersive element; and one or more thermoelectric terahertz detectors in an optical path from the dispersive element, the one or more detectors each comprising an uncooled, thermally isolated sensor and a micro antenna connected to the uncooled sensor; wherein the one or more detectors are arranged according to their optimal sensitivity in a spectral range of interest as defined by the dispersive range of the dispersive element and the one or more detectors form a linear array; and wherein the thermally isolated sensor of the one or more thermoelectric terahertz detectors comprises; a microbridge, the microbridge comprising; a first dielectric layer; a first metal layer extending from a mid-portion of the microbridge to a first antenna contact pad; a second metal layer extending from the mid-portion of the microbridge to a second antenna contact pad and overlapping a portion of the first metal layer; and a second dielectric layer disposed over the first metal layer and a second metal layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification