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Carbon nanotube blackbody film for compact, lightweight, and on-demand infrared calibration

A technology of carbon nanotubes and carbon nanotube layers, applied in the field of optical sensor calibration, can solve problems such as trouble, power consumption, and large volume

Active Publication Date: 2015-12-30
RAYTHEON CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional black body sources therefore consume a large amount of power
Second, traditional blackbody sources and their supporting optical structures are typically bulky, and using one or more of them requires precise optics to image each blackbody emission spectrum onto a sensor undergoing calibration
Third, such blackbody radiator calibration systems and their accompanying optics are often bulky and cumbersome

Method used

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  • Carbon nanotube blackbody film for compact, lightweight, and on-demand infrared calibration
  • Carbon nanotube blackbody film for compact, lightweight, and on-demand infrared calibration
  • Carbon nanotube blackbody film for compact, lightweight, and on-demand infrared calibration

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Embodiment Construction

[0013] figure 1 An example optical system 100 is shown for detecting light or light signals according to example embodiments. The optical system 100 includes a sensor 102 such as an optical sensor or an optical detector. Light or a light signal propagating from a selected object or target 110 along optical path 104 is detected at sensor 102 . To maintain sensor accuracy, a calibration device 106 may be moved into the optical path 104 . In an example embodiment, the optical system 100 may operate in a sensing mode in which the calibration device 106 may be positioned at a first location A outside the optical path 104 of the optical sensor 102 . The optical system 100 can also be operated in a calibration mode in which the calibration device 106 can be moved to a second position B in the optical path 104 of the optical sensor 102 . Once in optical path 104 , calibration device 106 prevents light or optical signals from object 110 from reaching optical sensor 102 . Calibratio...

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Abstract

An apparatus and method of calibrating a sensor is disclosed. A voltage is applied to a first carbon nanotube layer to obtain a first temperature of the first carbon nanotube layer. A thermally conductive layer is used to provide a substantially uniform temperature related to the first temperature of the first carbon nanotube layer by smoothing a spatial variation of the first temperature. A second carbon nanotube layer receives the substantially uniform temperature and emits a first blackbody radiation spectrum to calibrate the sensor. The apparatus may be used to emit a second black body radiation spectrum by altering the applied voltage.

Description

Background technique [0001] The present disclosure relates to calibration of optical sensors, and in particular to methods and apparatus for providing multiple radiation spectra to optical sensors for calibration purposes. [0002] In various optical systems, an optical signal is received from an object at an optical sensor, and measurements of the optical signal are obtained at the optical sensor to determine a characteristic of the object. To obtain accurate measurements, it is often necessary to calibrate optical sensors with known photon fluxes at one or more standard wavelengths. A method for providing photon flux at a standard wavelength includes: heating one or more black body radiators to a selected temperature; and using optical filters to select the wavelength. However, using a blackbody source to calibrate optical sensors presents size, weight, and power (SWaP) challenges. First, conventional black body radiators need to be heated for a relatively long time before...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L29/06H10K99/00
CPCG01J5/0878B82Y20/00G01J5/53H10K85/221
Inventor 詹姆斯·R·乔布鲁斯·希拉诺大卫·M·拉·科姆斯基
Owner RAYTHEON CO