WO2010082852A1 - Spectromètre à source codée à del - Google Patents

Spectromètre à source codée à del Download PDF

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Publication number
WO2010082852A1
WO2010082852A1 PCT/NZ2010/000001 NZ2010000001W WO2010082852A1 WO 2010082852 A1 WO2010082852 A1 WO 2010082852A1 NZ 2010000001 W NZ2010000001 W NZ 2010000001W WO 2010082852 A1 WO2010082852 A1 WO 2010082852A1
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WO
WIPO (PCT)
Prior art keywords
led
based spectrometer
spectrometer
led based
light
Prior art date
Application number
PCT/NZ2010/000001
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English (en)
Inventor
Geordie Robert Burling-Claridge
Anthony Llewelyn Wood
Philip Edward Petch
Original Assignee
Geordie Robert Burling-Claridge
Anthony Llewelyn Wood
Philip Edward Petch
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Filing date
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Application filed by Geordie Robert Burling-Claridge, Anthony Llewelyn Wood, Philip Edward Petch filed Critical Geordie Robert Burling-Claridge
Publication of WO2010082852A1 publication Critical patent/WO2010082852A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G01J3/10—Arrangements of light sources specially adapted for spectrometry or colorimetry
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/251—Colorimeters; Construction thereof
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/12—Generating the spectrum; Monochromators
    • G01J2003/1282—Spectrum tailoring
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/28—Investigating the spectrum
    • G01J2003/2866—Markers; Calibrating of scan
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/06—Illumination; Optics
    • G01N2201/062—LED's
    • G01N2201/0627—Use of several LED's for spectral resolution

Definitions

  • This invention relates generally to a spectrometer built using LEDs of different core frequency as light sources, with said LEDs coded to allow extraction of the individual LED expression in a target material, and to also allow for the implicit mitigation of ambient light.
  • a Spectrometer is an optical instrument used to measure properties of light over a specific portion of the electromagnetic spectrum, and is typically used in spectroscopic analysis to identify materials.
  • the variable measured is most often the light's intensity but could also, for instance, be the polarization state.
  • the independent variable is usually the wavelength of the light, normally expressed as some fraction of a meter, but is sometimes expressed as some unit directly proportional to the photon energy, such as wave number or electron volts, which has a reciprocal relationship to wavelength.
  • Spectrometer is a term that is applied to instruments that operate over a very wide range of wavelengths, from gamma rays and X-rays into the far infrared. If the region of interest is restricted to near the visible spectrum, the study is called spectrophotometry.
  • any particular instrument will operate over a small portion of this total range because of the different techniques used to measure different portions of the spectrum.
  • a Light Emitting Diode is a semiconductor diode that emits light when an electric current is applied in the forward direction of the device, across the p-n junction forming the diode itself.
  • the wavelength of the light emitted, and therefore its colour, depends on the band gap energy of the materials forming the p-n junction.
  • the materials used for the LED have a direct band gap with energies corresponding to near-infrared, visible or near- ultraviolet light.
  • LED development began with infrared and red devices made with gallium arsenide. Advances in materials science have made possible the production of devices with ever-shorter wavelengths, producing light in a variety of colours.
  • An LED is usually a small area (less than 1 mm 2 ) light source, often with optics added directly on top of the chip to shape its radiation pattern and assist in reflection [1][2].
  • the colour of the emitted light depends on the composition and condition of the semiconducting material used, and can be infrared, visible, or ultraviolet. Since LED's have quite specific light emitting behaviour, and this behaviour is relatively stable, one could take a group of LEDs of different wavelengths and combine them to provide a composite light source. By allowing this light to fall onto a sample and then collecting the returned light and analysing it via a spectrometer, a simple, robust self- lighted spectrometer system may be formed.
  • the quality of the data is closely linked to the quality of the spectrometer, and aside from cost there is little advantage over a broad-spectrum light source (e.g. halogen bulb) coupled to the spectrometer itself. Accordingly, there is no advantage gained by using LEDs with the spectrometer systems presently known by those skilled in the art. LEDs have another very useful capability, in that they switch from on to off (and vice versa) extremely quickly relative to conventional incandescent or other light sources. Furthermore, their settling time (the time taken to reach a steady state) is also very short. Both these times are typically of the order nanoseconds or less, compared with hours to reach equilibrium for a typical halogen bulb.
  • a broad-spectrum light source e.g. halogen bulb
  • a Hadamard scheme This scheme has a series of steps, where for every step about half the LEDs are on, and the scheme then flips all the LEDs from on to off and vice versa.
  • the precise detail of which LED is on or off for the various parts of the cycle is critical, but well understood.
  • Using an appropriate Hadamard coding scheme provides almost complete compensation for ambient light changes through the collection time, or for any longer time period (as when comparing scans taken some time apart).
  • a further advantage to this approach [3] is that the amalgamation of several LED sources constitutes a noise reduction amounting to as much as M/2 for low intensity light detection. In the case where one might consider replacing a conventional spectrometer, this might constitute 40 or more LEDs, giving a noise reduction factor of 20 or better over an individual LED measurement.
  • the light output from the LED sources be itself measured simultaneously with the light returned from the sample of interest.
  • this may be achieved by a second detector of similar or identical design to the primary sample detector, and a method of bringing a representative portion of the LED light upon this detector.
  • a shielded fibre optic ring located forward of the LEDs which is shielded to avoid collection of light coming from the sample. Contrasting the sample derived light against the reference light for every Hadamard step provides an essential measure of the device performance and a method of compensating for any changes in performance over time.
  • the reference collection need not be identical to the sample directed LED light, it merely needs to be optically constant, and exclude any sample effects. In this way, a relative change in reference intensity may be interpreted as a correction for the collected sample intensity.
  • LEDs are extremely robust, and have very low energy drain, allowing an LED based spectrometer of this design to be very rugged, and able to operate on quite modest power requirements.
  • This device would have no moving parts at all, yet be insensitive to ambient light without needing to directly measure that light.
  • the modest power dissipation would allow for a completely sealed unit, making it ideal for measurements in explosive environments and/or where local heating could be an issue.
  • a sealed unit would also be suitable for measurements in damp or even very wet circumstances, and would tend to be more robust with respect to industrial cleaning practises.
  • the device would be self-lighted, inherently insensitive to ambient light, moisture, vibration and would also be shock proof.
  • the low power requirement means simple power reticulation and lessened power supply requirements. This would make such a unit ideally suited to industrial measurements taken close to the sample such as (but not limited to) paddock measures, processing environments, any measurements needed with poor vibration control, and the like.
  • LEDs are quite cheap.
  • the unit is likely to be very cost effective, able to be manufactured for a reasonable premium over even cheap conventional spectrometers, without sacrificing noise control, and would display considerably enhanced robustness.
  • Such a device would have myriad of uses, from single hand-held units to measure targeted products through to research tools and industrial control devices, and to systems that could be conveniently mounted in a bracket or holder for continuous or on-line applications.
  • the system could be designed to operate via a battery operated system where the battery could be replaced or recharged as required, either by a docking station or communication cable or the like, although it should be appreciated that these are listed by way of example and are not intended to be limiting in any way.
  • an LED based spectrometer comprising: a plurality of LED light sources that are capable of exhibiting different wavelengths and bandwidths, arranged in any convenient manner about a detector module wherein the sample and reference optical paths are distinct from each other.
  • the LED sources may be switched in any convenient manner and in preferred embodiments the LEDs are switched in a Hadamard complement coded sequence.
  • the LED individual signal may be decoded using the inverse Hadamard matrix.
  • the reference optical path should largely exclude light returned from the target or sample.
  • the reference collection uses at least one fibre optic glass cable, and in preferred embodiments, the fibre optic glass cable is bare.
  • the sample and reference detectors may be identical in design.
  • sample and reference detectors are substantially identical in design.
  • spectral responses may be recorded, along with relevant controls and other details, into non-volatile memory within the spectrometer, such as a Secure Digital card and associated protocol or the like, but not limited to such.
  • the specific arrangement of the LEDs relative to the detector may be altered for different desired applications, including but not limited to the light transmitting through the sample or target before detection (transmission), or reflecting from the sample surface, or in other embodiments, the light being constrained so that surface reflected light may not reach the detector, but light entering the sample is able to do so (interaction or transflection mode).
  • the light transmitting through the sample or target before detection (transmission) or reflecting from the sample surface, or in other embodiments, the light being constrained so that surface reflected light may not reach the detector, but light entering the sample is able to do so (interaction or transflection mode).
  • interaction or transflection mode Clearly these different requirements would need specific, different arrangements of the LEDs with respect to the detectors, as would be appreciated by those skilled in the art.
  • communication between the spectrometer and other devices may be accomplished using the FieldTrans protocol, the USB protocol, or the TCP/IP protocol (or both) although this should not be seen to be limiting in any way as other communication protocols may also be used.
  • an LED based spectrometer as detailed above which uses LED's of different core wavelengths and/or band widths specific to a desired application.
  • the present invention is an embodiment of a plurality of LED sources at different central wavelengths arranged in order to illuminate a target evenly.
  • the LED's are switched in groups following a Hadamard complement coding scheme.
  • Light is reflected from (or transmitted through) a target material and collected for each code instance separately.
  • the collecting detector may be any convenient type, chosen so its response range includes the light emission wavelengths of the LED's. There may be several detectors to cover the LED wavelength range if desired.
  • a reference light detector or detectors, collects light directly from the LED's, without any collected reference light having interacted with the sample. This may be accomplished in a number of ways that arrange the optics of the system to allow a small amount of LED scatter light to impinge on a collector element (or plurality thereof) and be directed toward the reference detector(s). Critically, however, this reference light path must exclude light that returns from the sample.
  • the reference detectors themselves, in preferred embodiments, would be of the same type as those of the sample detectors. It should be clear, however, to those skilled in the art, that reference detectors of dissimilar design may also be suitable, with suitable conversion factors.
  • the intensity of light returned from the sample is recorded for each of the code steps in the Hadamard positive and complement or negative patterns.
  • the normal first code pattern of the Hadamard complement positive matrix is to have all components turned on. Since all other positive and negative codes have precisely half the components switched on, there can be dynamic range issues if the detector system settings are approp ⁇ ate for the particular energy level when all subsequent codes are about half that intensity.
  • a Modified Hadamard Complement scheme where this first positive code is omitted and substituted with the SUM of the second positive and second negative code intensity readings.
  • the first negative reading must be doubled.
  • the resultant spectrum will comprise a single value for each LED in the array.
  • These spectra can be treated in the normal manner for analysis, as is the case with any other spectrum.
  • the signals from all the detector diodes may be treated separately, or combined (added) in any convenient manner, as best fits the electronic and/or processing advantages and limitations of the specific design employed.
  • an LED based spectrometer as described above characterised by the steps of orienting the LED based spectrometer toward a sample of interest, activating the LED based spectrometer, and collecting the results.
  • a device capable of being conveniently hand held that includes an LED based spectrometer as described above.
  • Figure 1 is a cross sectional view of one embodiment of the LED spectrometer of the present invention.
  • Figure 2 is a diagram of the LED spectrometer in front view, showing the arrangement of LED' s around the central detector optics.
  • Figure 3 is a diagram of the LED Spectrometer in cross section, showing the principle of aiming the central beam direction of the various LEDs.
  • Figure 4 is a diagram of the principle of using an optical element to focus an individual LED output.
  • Figure 5 is a diagram of the LED Spectrometer in front view showing the spatial distribution of different LED types.
  • Figure 6 is a diagram of the LED Spectrometer in front view showing the location of an example reference fibre relative to the LEDs.
  • Figure 7 is a functional block-diagram of the circuit suitable to control an LED spectrometer of the present invention.
  • Figure 1 shows a cross sectional view of one embodiment of an LED spectrometer generally indicated by arrow 1, which includes a reference fibre (with shield not shown) (2), LEDs (each of which includes individual optics) (3) and LED controller electronics (4). Also shown are the detector electronics (5), the sample or target light detector (6), the reference or LED light detector (7), the detector optics (8) and detector optics mounting device (9), which are optional for some applications, and a window to allow light in and out (10).
  • the LED's are arranged in annuli or concentric rings around a central detector core. It should be understood that other physical arrangements may be preferred for various reasons, such as grouping the LED assemblies or specific locations of LED's for transmission rather than reflectance measures.
  • FIG. 2 shows the LED spectrometer with the LEDs arranged in rings as generally indicated by arrow 11.
  • the LEDs (3) are located around the central sample light detector optics (7) and mounting device (8).
  • the LED's (3) are individually focused using the lenses moulded into the LED bodies themselves. It should be understood that many other form- factors, and mounting systems including direct wire bonding or surface mounted ceramic (SMC), with or without secondary lenses and either imaging or non-imaging optics are also possible, with appropriate modification to other elements in order to accommodate those modifications.
  • SMC surface mounted ceramic
  • the LED (3) light is partially focused by each individual LED (12) with an incorporated lens (13), and the axes of these beams (14) are focused to a point appropriate to the intended application (15), approximately 200mm from the plane of the LEDs, as shown in Figure 3.
  • An alternate focusing mechanism could be to use a planar- convex lens (16), or other optical element(s), mounted close to the LED units (12), with focal length appropriate for the desired application, as shown in Figure 4.
  • focal lengths maybe desirable for different applications, and this may be achieved by a number of methods including, but not limited to, one or several of: altering the individual LED beam direction directly; using a shaped lens or lenses mounted in the beam path; tilting or altering the LED mount(s).
  • three LED's (17) are implanted for each desired wavelength. These are arranged in any convenient manner, with the restriction that each of the three LED's are 120 degrees apart, in order to ensure even sample illumination. It should be understood that different arrangements of the LED's may be designed for specific cases, such as for varying transmission, and/or for particular target attributes.
  • the reference collector is a glass fibre (18), of suitable diameter, looped around the LED clusters (17) and masked from light that may have returned from the sample or target, as shown in Figure 6. Both ends of this fibre are drawn down and directed onto the detection region of the reference detector (7) shown in Figure 1. It should be understood that other methods for collecting this reference light may be more appropriate for different designs.
  • Figure 1 shows a final glass window (10) sealing the system.
  • this window may be constructed from any convenient material. Consideration of the window's optical properties is, of course, important to ensure robust spectrometer performance.
  • Preferred embodiments of the present invention employ a Hadamard sequence switching of the LED sources. While any convenient switching control may be suitable, the Hadamard complement sequence offers signal to noise advantages, as discussed in detail elsewhere [3].
  • the inventors consider a Hadamard sequence to be a mathematical coding expressed in matrix form where each row of the matrix represents a given overall state of the LED array (a mixture of on and off switched LEDs) for a given capture value of the detector(s).
  • Each column of the matrix represents the various ON (+1) and OFF (-1) states for a given individual LED, across the various LED array states. For a simple case of 4 LEDs, the matrix is:
  • H(m) is the Hadamard matrix for m-LEDs
  • the LED array may be switched arbitrarily quickly.
  • Figure 7 shows a block diagram of the circuit used to implement the LED switch coding.
  • the diagnostics interface (19), the temperature sensor(s) (20), the real-time clock (21) and the main power supply (22) are all connected to the microcontroller(s) (23).
  • This microcontroller(s) (23) sends a signal to the LED controllers) (24), which in turn sends a signal to the LED Bank(s) (25).
  • the LED Bank(s) (25) then produce a source of light (26) which is reflected off the sample of interest (28). The light is then reflected/returned back (29) from the sample (28) to the detector(s) and related amplifiers (30).
  • the detector(s) (30) then send a signal to the analogue to digital converter(s) (31) and the signal is then fed back into the microcontrollers) (23) Simultaneously to producing a source of light directed at the sample (26), the LED Bank also produces light (27) directed toward the reference fibre (18). This reference light (27) is taken onto the detectors and related amplifiers (30). The reference detector(s) then send a signal to the analogue to digital converter(s) (31) and the reference signal is also fed back into the microcontroller(s) (23).
  • the reference and sample signals may be kept separate or combined within the microprocessor(s) (23), and may incorporate corrections due to the various other inputs (temperature sensor(s) (20), Real-time clock (21), Main power supply (22), or other performance measures as may be available) as may be convenient for the specific outcome.
  • the microprocessors) (23) then send the signal(s) out to various outputs such as a nonvolatile memory (32), a USB interface (33), an Ethernet interface (34) and/or various control inputs and indicators (35). Electronic control of each LED switches these on or off according to the current Hadamard code pattern desired.
  • the Hadamard complement system is used in the manner defined above.
  • the combined response is decoded to individual LED responses using the inverse Hadamard matrix.
  • the Hadamard matrix is an ideal candidate is that the inverse Hadamard matrix is just the transpose of the original matrix, with a scaling factor.
  • the detector signal is digitally converted from the analogue detector output, and as such is represented by integer values.
  • the Hadamard coding also uses integer values, as shown above. By deferring the scaling until a final step, the matrix deconvolution remains an integer arithmetic step, and hence accrues no floating- point rounding. This is especially important for large matrices, with many hundreds of multiplications required to calculate the inverse. By retaining integer mathematics, a further signal to noise advantage is obtained.
  • Decoding the Hadamard detector signal produces a spectrum where each decoded response corresponds to the expected reading that would have been obtained had a single LED been switched on.
  • spectral responses are recorded along with all other relevant control instructions onto an internal memory system such as a Secure-Digital card.
  • an internal memory system such as a Secure-Digital card.
  • other storage systems may be suitable for different applications, including directly sending these spectra to an external storage or analysis system.
  • communication to the device is accomplished by USB V 1.0 or better cables and protocols.
  • other comparable capability communications systems may also be employed, such as but not limited to TCP/IP, RS232, and the like.
  • the device as described is self-contained in a single module. This may include an internal power source, or the power source may be external to this module. It should be understood that in some applications it may be convenient to split the system into two or more module.
  • Such a latter device may include an integral trigger system as per conventional bar-code readers and the like.
  • the choice of power supply may vary depending on particular application and should be sufficient to operate for a convenient length of time.
  • Said power supply may include, but not be limited to, an attached power source such as an electric battery.

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  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

La présente invention concerne un spectromètre à DEL comprenant une pluralité de sources lumineuses DEL capables de présenter différentes longueurs d'onde et différentes largeurs de bande; les sources lumineuses DEL sont ménagées de manière pratique autour d'un module détecteur, les trajets optiques de référence et échantillon étant distincts. Dans des modes de réalisation privilégiés, les sources DEL sont commutées dans un motif codé ou dans des motifs correspondant au schéma complémentaire d'Hadamard ou à un schéma complémentaire modifié.
PCT/NZ2010/000001 2009-01-06 2010-01-05 Spectromètre à source codée à del WO2010082852A1 (fr)

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NZ57402309 2009-01-06
NZ574023 2009-01-06

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Cited By (10)

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FR2982366A1 (fr) * 2011-11-07 2013-05-10 Ct Nat De Machinisme Agricole Du Genie Rural Des Eaux Et Des Forets Cemagref Capteur optique pour la determination de la teneur en matiere seche d'un produit, et procede correspondant
WO2014009139A1 (fr) * 2012-07-12 2014-01-16 Siemens Aktiengesellschaft Sonde spectromètre à base de diodes électroluminescentes
WO2017121814A1 (fr) * 2016-01-13 2017-07-20 Institut Dr. Foerster Gmbh & Co. Kg Appareil portatif pour détecter des explosifs avec un dispositif pour produire et mesurer des émissions d'un indicateur
RU2649048C1 (ru) * 2016-11-25 2018-03-29 Самсунг Электроникс Ко., Лтд. Система компактного спектрометра, предназначенного для неинвазивного измерения спектров поглощения и пропускания образцов биологической ткани
KR20190014383A (ko) * 2017-08-02 2019-02-12 삼성전자주식회사 스펙트럼 측정 장치 및 방법과, 스펙트럼 측정 장치의 캘리브레이션 방법
EP3505911A1 (fr) * 2017-12-29 2019-07-03 Samsung Electronics Co., Ltd. Capteur optique et appareil et procédé de mesure d'absorbance l'utilisant
US10451548B2 (en) 2016-01-15 2019-10-22 The Mitre Corporation Active hyperspectral imaging system
WO2020014786A1 (fr) * 2018-07-17 2020-01-23 Kerber Thomas Bernard Appareil et méthode d'imagerie par fluorescence
CN110793924A (zh) * 2018-08-01 2020-02-14 三星电子株式会社 用于分析对象的组分的装置和方法以及图像传感器
US10948346B2 (en) 2016-11-08 2021-03-16 Samsung Electronics Co., Ltd. Spectrometer, apparatus and method for measuring biometric information

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Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2982366A1 (fr) * 2011-11-07 2013-05-10 Ct Nat De Machinisme Agricole Du Genie Rural Des Eaux Et Des Forets Cemagref Capteur optique pour la determination de la teneur en matiere seche d'un produit, et procede correspondant
WO2014009139A1 (fr) * 2012-07-12 2014-01-16 Siemens Aktiengesellschaft Sonde spectromètre à base de diodes électroluminescentes
WO2017121814A1 (fr) * 2016-01-13 2017-07-20 Institut Dr. Foerster Gmbh & Co. Kg Appareil portatif pour détecter des explosifs avec un dispositif pour produire et mesurer des émissions d'un indicateur
US10451548B2 (en) 2016-01-15 2019-10-22 The Mitre Corporation Active hyperspectral imaging system
US10948346B2 (en) 2016-11-08 2021-03-16 Samsung Electronics Co., Ltd. Spectrometer, apparatus and method for measuring biometric information
RU2649048C1 (ru) * 2016-11-25 2018-03-29 Самсунг Электроникс Ко., Лтд. Система компактного спектрометра, предназначенного для неинвазивного измерения спектров поглощения и пропускания образцов биологической ткани
US10258236B2 (en) 2016-11-25 2019-04-16 Samsung Electronics Co., Ltd. Compact spectrometer system for non-invasive measurement of absorption and transmission spectra in biological tissue samples
US10004399B2 (en) 2016-11-25 2018-06-26 Samsung Electronics Co., Ltd. Compact spectrometer system for non-invasive measurement of absorption and transmission spectra in biological tissue samples
EP3326521A1 (fr) 2016-11-25 2018-05-30 Samsung Electronics Co., Ltd. Système compact de spectromètrie pour mesure non invasive de spectres de transmission et d'absorption dans des échantillons de tissus biologiques
US10582855B2 (en) 2016-11-25 2020-03-10 Samsung Electronics Co., Ltd. Compact spectrometer system for non-invasive measurement of absorption and transmission spectra in biological tissue samples
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JP2019120703A (ja) * 2017-12-29 2019-07-22 三星電子株式会社Ｓａｍｓｕｎｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｃｏ．，Ｌｔｄ． 光センサー、それを用いた吸光度測定装置及び方法
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JP7338969B2 (ja) 2017-12-29 2023-09-05 三星電子株式会社 光センサー、それを用いた吸光度測定装置及び方法
WO2020014786A1 (fr) * 2018-07-17 2020-01-23 Kerber Thomas Bernard Appareil et méthode d'imagerie par fluorescence
CN110793924A (zh) * 2018-08-01 2020-02-14 三星电子株式会社 用于分析对象的组分的装置和方法以及图像传感器

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