IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0533679
(2009-07-31)
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등록번호 |
US-8350223
(2013-01-08)
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발명자
/ 주소 |
- Mintz, Nathan M.
- Spariosu, Kalin
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
7 |
초록
▼
In one embodiment, a quantum dot based radiation source includes a housing having a wall defining a cavity therein, a plurality of quantum dots disposed on an inner surface of the wall of the housing, and a radiation excitation source in optical communication with the housing and configured to outpu
In one embodiment, a quantum dot based radiation source includes a housing having a wall defining a cavity therein, a plurality of quantum dots disposed on an inner surface of the wall of the housing, and a radiation excitation source in optical communication with the housing and configured to output radiation to excite the plurality of quantum dots to emit radiation in a desired wavelength range. The quantum dot based radiation source can be used in a calibration system or calibrator, for example to calibrate a detector.
대표청구항
▼
1. A quantum dot based radiation source, comprising: a housing having a wall defining a cavity therein;a plurality of quantum dots disposed on a plurality of substrate panels disposed on a first portion of an inner surface of the wall; anda radiation excitation source in optical communication with t
1. A quantum dot based radiation source, comprising: a housing having a wall defining a cavity therein;a plurality of quantum dots disposed on a plurality of substrate panels disposed on a first portion of an inner surface of the wall; anda radiation excitation source in optical communication with the housing and configured to output first radiation to excite the plurality of quantum dots to emit second radiation in a desired wavelength range;wherein a second portion of the inner wall of the housing is coated with a radiation reflective material selected to reflect the second radiation emitted by the plurality of quantum dots, the first portion of the inner surface of the wall is free of the radiation reflective material, and the first and second portions of the inner surface of the wall are mutually exclusive. 2. The radiation source of claim 1, wherein the second radiation emitted by the plurality of quantum dots is dependent upon a chemical composition of the plurality of quantum dots or a size of the plurality of quantum dots, or both. 3. The radiation source of claim 1, wherein the plurality of quantum dots comprise quantum dots of various sizes, or various chemical compositions, or both. 4. The radiation source of claim 1, wherein the plurality of quantum dots comprise a first type of quantum dots emitting radiation in a first wavelength range and a second type of quantum dots emitting radiation in a second wavelength range substantially distinct from the first wavelength range such that the second radiation emitted by the plurality of quantum dots has a wavelength spectrum that extends over the first and the second wavelength ranges. 5. The radiation source of claim 4, wherein the first type of quantum dots has either a chemical composition, a size, or both, different from a chemical composition or a size, or both of the second type of quantum dots. 6. The quantum dot based radiation source of claim 4, wherein the plurality of substrate panels includes a first panel and a second panel, wherein the first type of quantum dots are disposed on the first panel and the second type of quantum dots are disposed on the second panel. 7. The quantum dot based radiation source of claim 6, wherein the first wavelength range includes wavelengths that are longer than wavelengths in the second wavelength range, and wherein the first type of quantum dots are larger than the second type of quantum dots. 8. The quantum dot based radiation source of claim 4, wherein the first and second types of quantum dots are spread as layers and stacked on at least one of the plurality of substrate panels. 9. The radiation source of claim 1, wherein the first radiation has a shorter wavelength than a wavelength of the second radiation emitted by the quantum dots. 10. The radiation source of claim 9, wherein the first radiation output by the excitation radiation source comprises ultraviolet radiation. 11. The radiation source of claim 1, wherein the plurality of quantum dots are selected from the group consisting of InSb, PbTe, HgTe, CdTe, CdSe, CdS, and PbSnTe. 12. The radiation source of claim 1, wherein the radiation source includes an integrating sphere, wherein the housing is spherical. 13. The radiation source of claim 12, wherein the first and second portions of the inner surface of the wall of the housing are first and second hemispheres of the wall. 14. The radiation source of claim 1, further comprising an output port provided in the housing, wherein the second radiation emitted by the plurality of quantum dots is output through the output port. 15. The radiation source of claim 1, wherein the radiation excitation source is disposed in the housing. 16. A calibration system, comprising: a quantum dot based radiation source comprising: a housing having a wall defining a cavity therein;a plurality of quantum dots disposed on a plurality of substrate panels, the substrate panels disposed on a first portion of an inner surface of the wall;a radiation excitation source configured to output first radiation to excite the plurality of quantum dots to emit second radiation in a desired wavelength range, the emitted second radiation being output by the quantum dot based radiation source;a radiation reflective material disposed on a second portion of the inner surface of the wall and not on the first portion of the inner surface of the wall, the first and second portions being mutually exclusive, and the radiation reflective material selected to reflect the second radiation emitted by the plurality of quantum dots; andan integrating sphere configured to receive the emitted second radiation output by the quantum dot based radiation source. 17. The calibration system of claim 16, wherein the housing is spherical and the first and second portions of the inner surface of the wall of the housing are first and second hemispheres of the wall. 18. A method of calibrating a radiation detector, comprising: exciting a plurality of quantum dots with a first radiation so that the quantum dots emit a second radiation in a desired wavelength range, the quantum dots being disposed on a plurality of substrate panels disposed on a first portion of an inner surface of a wall of a housing defining a cavity therein;reflecting and diffusing the second radiation emitted by the plurality of quantum dots with a radiation reflective material disposed only on a second portion of the inner surface of the wall and not on the first portion of the inner surface of the wall, the first and second portions being mutually exclusive;outputting the second radiation through an output port in the housing;guiding the second radiation towards the radiation detector; andcalibrating the detector using the second radiation, and establishing a relationship between a signal output by the detector and a photon flux emitted by an object. 19. The method of claim 18, further comprising directing the second radiation emitted by the quantum dots to an integrating sphere and outputting the second radiation through an output port of the integrating sphere. 20. The method of claim 18, wherein a wavelength of the first radiation is shorter than or equal to a wavelength of the second radiation emitted by the quantum dots.
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