IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0943857
(2010-11-10)
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등록번호 |
US-8717574
(2014-05-06)
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발명자
/ 주소 |
- Yang, Changhuei
- Cui, Meng
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출원인 / 주소 |
- California Institute of Technology
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
3 인용 특허 :
6 |
초록
▼
A detector of light transmitted through a turbid medium, comprising: one or more Digital Optical Phase Conjugation (DOPC) devices, wherein the DOPC devices include (1) a sensor for detecting input light that has been transmitted through the turbid medium and inputted on the sensor; and (2) a spatial
A detector of light transmitted through a turbid medium, comprising: one or more Digital Optical Phase Conjugation (DOPC) devices, wherein the DOPC devices include (1) a sensor for detecting input light that has been transmitted through the turbid medium and inputted on the sensor; and (2) a spatial light modulator (SLM) for outputting, in response to the input light detected by the sensor, output light that is an optical phase conjugate of the input light.
대표청구항
▼
1. A detector of transmitted light that has been transmitted through a turbid medium, comprising: one or more Digital Optical Phase Conjugation (DOPC) devices, wherein the DOPC devices include:a sensor for detecting interference of reference light with input light, wherein the input light has been t
1. A detector of transmitted light that has been transmitted through a turbid medium, comprising: one or more Digital Optical Phase Conjugation (DOPC) devices, wherein the DOPC devices include:a sensor for detecting interference of reference light with input light, wherein the input light has been transmitted through the turbid medium and inputted on the sensor;one or more processors for: determining one or more input phases of the input light from the interference;modifying the input phases to produce optical phase conjugates of the input phases; anda spatial light modulator (SLM) for outputting, in response to the input light detected by the sensor, output light that is generated from the optical phase conjugates of the input light. 2. The detector of claim 1, wherein the transmitted light includes the output light and the input light, the detector further comprising: a holder for supporting the turbid medium and positioned such that the transmitted light is transmitted through the turbid medium, wherein the output light that has been transmitted through the turbid medium, and that has retraced a path of the input light through the turbid medium, experiences reduced effects due to scattering by the turbid medium as compared to the input light. 3. The detector of claim 2, wherein: the DOPC devices include a first DOPC device and a second DOPC device;the DOPC devices and the holder are positioned such that the transmitted light propagates between the first DOPC device and the second DOPC device and passes through the turbid medium each time the transmitted light propagates between the first DOPC device and the second DOPC device, andthe output light from the first DOPC is inputted as the input light to the second DOPC device. 4. The detector of claim 3, wherein the DOPC devices and the holder are positioned such that the output light from the second DOPC device is inputted as the input light to the first DOPC device. 5. The detector of claim 4, further comprising one or more processors for calculating absorption and transmission of the transmitted light after one or more passes of the transmitted light through the turbid medium, wherein the absorption and the transmission is calculated from one or more input light fields of the input light and one or more output light fields of the output light detected by the DOPC devices. 6. The detector of claim 5, wherein the processors calculate the absorption and the transmission of the transmitted light that made n passes through the turbid medium, where n is a number of passes that yields between 40% and at least 66% transmission of the transmitted light as compared to an (n−1)th pass and for a turbid medium that does not absorb the transmitted light. 7. The detector of claim 5, wherein: the turbid medium is biological tissue and the one or more processors calculate the absorption of the transmitted light as a function of one or more wavelengths of the transmitted light;the absorption is for matching with data in a database, the data including known absorption as a function of wavelength for one or more medically relevant biochemicals, andthe matching identifies an amount of the medically relevant biochemicals in the biological tissue. 8. The detector of claim 1, further comprising: a beam splitter positioned to direct the input light, and transmit the reference light, to the sensor so that the input light and the reference light interferes and forms the interference comprising one or more holograms on the sensor, the holograms comprising interferometric data; andthe one or more processors for:receiving the interferometric data and determining the input phases and input amplitudes of input light fields of the input light from the inteferometric data;digitally modifying the input phases and the input amplitudes to produce modified input phases and modified input amplitudes; andoutputting the modified input phases and modified input amplitudes to the SLM and so that the SLM outputs the output light having the modified input phases and modified input amplitudes that are the optical phase conjugates of the input phases and the input amplitudes. 9. The detector of claim 8, further comprising an electro-optic modulator that controls a relative phase between the input light fields of the input light and reference fields of the reference light, so that the holograms include one or more phase shifted holograms. 10. The detector of claim 1, wherein: the sensor comprises a plurality of sensor pixels,the SLM comprises a plurality of SLM pixels forming a second array, andthe sensor and the SLM are optically aligned so that each sensor pixel forms a virtual image of the sensor pixel on a corresponding SLM pixel. 11. The detector of claim 1, wherein the output light is used to view an object through the turbid medium, and the output light forms an image of the object that is clearer than an image formed without the DOPC device. 12. A method of fabricating a detector of transmitted light transmitted through a turbid medium, comprising: positioning and connecting, in one or more Digital Optical Phase Conjugation (DOPC) devices:a sensor for detecting interference of reference light with input light, wherein the input light has been transmitted through the turbid medium and inputted on the sensor;one or more processors for: determining one or more input phases of the input light from the interference;modifying the input phases to produce optical phase conjugates of the input phases; anda spatial light modulator (SLM) for outputting, in response to the input light detected by the sensor, output light that is generated from the optical phase conjugates of the input light, wherein the output light experiences reduced effects due to scattering by the turbid medium as compared to the input light. 13. The method of claim 11, wherein the transmitted light includes the output light and the input light, the method further comprising positioning a holder for supporting the turbid medium such that the transmitted light is transmitted through the turbid medium, wherein the output light that has been transmitted through the turbid medium, and that has retraced a path of the input light through the turbid medium, experiences reduced effects due to scattering by the turbid medium as compared to the input light. 14. The method of claim 12, wherein the DOPC devices include a first DOPC device and a second DOPC device, the method further comprising: positioning the DOPC devices and the holder such that:the light propagates between the first DOPC device and the second DOPC device and passes through the turbid medium each time the transmitted light propagates between the first DOPC device and the second DOPC device, andthe output light from the first DOPC is inputted as the input light to the second DOPC device. 15. The method of claim 14, further comprising positioning the DOPC devices and the holder such that the output light from the second DOPC device is inputted as the input light to the first DOPC device. 16. The method of claim 15, further comprising providing one or more processors for calculating absorption and transmission of the transmitted light after one or more passes of the transmitted light through the turbid medium, wherein the absorption and the transmission is calculated from one or more input light fields of the input light and one or more output light fields of the output light detected by the DOPC devices. 17. The method of claim 16, wherein the processors calculate the absorption and the transmission of transmitted light that made n passes through the turbid medium, where n is a number of passes that yields between 40% and at least 66% transmission of the light as compared to an (n−1)th pass and for a turbid medium that does not absorb the transmitted light. 18. The method of claim 16, wherein the turbid medium is biological tissue and the one or more processors calculate the absorption of the transmitted light as a function of one or more wavelengths of the transmitted light, wherein: (1) the absorption is for matching with data in a database, the data including known absorption as a function of wavelength for one or more medically relevant biochemicals, and(2) the matching identifying an amount of the medically relevant biochemicals in the biological tissue. 19. The method of claim 12, further comprising: positioning a beam splitter to direct the input light, and transmit the reference light, to the sensor so that the input light and the reference light interferes and forms the interference comprising one or more holograms on the sensor, the holograms comprising interferometric data; andproviding one or more processors for:receiving the interferometric data and determining the input phases and the input amplitudes of input light fields of the input light from the inteferometric data,digitally modifying the input phases and the input amplitudes to produce modified input phases and reversed input amplitudes; andoutputting the modified input phases and the modified input amplitudes to the SLM and so that the SLM outputs the output light having the modified input phases and modified input amplitudes that are the optical phase conjugates of the input phases and the input amplitudes. 20. The method of claim 19, further comprising positioning an electro-optic modulator to control a relative phase between the input light fields of the input light and reference fields of the reference light, so that the holograms include one or more phase shifted holograms. 21. The method of claim 12, wherein the sensor comprises a plurality of sensor pixels and the SLM comprises a plurality of SLM pixels forming a second array, the method further comprising optically aligning the sensor and the SLM so that each sensor pixel forms a virtual image of the sensor pixel on a corresponding SLM pixel. 22. The method of claim 12, wherein the output light is used to view an object through the turbid medium, and the output light forms an image of the object that is clearer than an image formed without the DOPC device. 23. A method for detecting transmitted light transmitted through a turbid medium, comprising: interfering reference light with one or more input light beams to form interference, wherein the input light beams have been transmitted through the turbid medium, inputted on the sensor, and include one or more input light fields;detecting the interference on a sensor;determining, in one or more processors, one or more input phases of the input light from the interference;modifying, in the one or more processors, the input phases to produce optical phase conjugates of the input phases; andoutputting, from a spatial light modulator (SLM), in response to the input light beams detected by the sensor, one or more output lights beams having one or more output light fields that are the optical phase conjugates of the input light fields, wherein the sensor and the SLM are in one or more digital optical phase conjugation (DOPC) devices. 24. The method of claim 23, wherein the turbid medium is biological tissue, the transmitted light includes the output light beams and the input light beams, and the DOPC devices include a first DOPC device and a second DOPC device, the method further comprising: propagating the transmitted light between the first DOPC device and the second DOPC device so that: the transmitted light passes through the turbid medium each time the transmitted light propagates between the first DOPC device and the second DOPC device,the output light beams from the first DOPC are inputted as the input light beams to the second DOPC device, andthe output light beams from the second DOPC device are inputted as the input light beams to the first DOPC device;using the input light fields and the output light fields to measure absorption (“measured absorption”) of the transmitted light by the biological tissue as a function of one or more wavelengths of the light;matching the absorption with data in a database, the data including known absorption as a function of wavelength for one or more medically relevant biochemicals, andidentifying an amount of the medically relevant biochemicals in the biological tissue based on a comparison of the measured absorption with the known absorption. 25. The method of claim 23, wherein the turbid medium scatters the transmitted light at least 200 times in one pass of the transmitted light through the turbid medium, the method further comprising: viewing an image through the turbid medium using the output light fields. 26. A phase conjugating device, comprising: a sensor for measuring interference of a reference wave with an input wave, wherein the input wave has been transmitted through a scattering medium;one or more processors for: determining one or more phases of the input wave from the interference;modifying the phases to produce one or more phase conjugates of the phases; anda spatial light modulator (SLM) for outputting one or more output waves generated from the phase conjugates.
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