WO2023276659A1 - 光源および自動分析装置 - Google Patents
光源および自動分析装置 Download PDFInfo
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- WO2023276659A1 WO2023276659A1 PCT/JP2022/023887 JP2022023887W WO2023276659A1 WO 2023276659 A1 WO2023276659 A1 WO 2023276659A1 JP 2022023887 W JP2022023887 W JP 2022023887W WO 2023276659 A1 WO2023276659 A1 WO 2023276659A1
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- led
- light source
- light
- temperature
- temperature sensor
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Images
Classifications
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- 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
- G01N21/255—Details, e.g. use of specially adapted sources, lighting or optical systems
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- 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
- G01N21/253—Colorimeters; Construction thereof for batch operation, i.e. multisample apparatus
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
- H01L25/16—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof the devices being of types provided for in two or more different main groups of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. forming hybrid circuits
- H01L25/167—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof the devices being of types provided for in two or more different main groups of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. forming hybrid circuits comprising optoelectronic devices, e.g. LED, photodiodes
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- 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
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/314—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths
- G01N2021/3181—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths using LEDs
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/02—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor using a plurality of sample containers moved by a conveyor system past one or more treatment or analysis stations
- G01N35/04—Details of the conveyor system
- G01N2035/0439—Rotary sample carriers, i.e. carousels
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- 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
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- 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
- G01N2201/0624—Compensating variation in output of LED source
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
- H01L33/505—Wavelength conversion elements characterised by the shape, e.g. plate or foil
Definitions
- the present invention relates to a light source and an automatic analyzer using the light source.
- samples and reagents are dispensed into containers for containing liquids, and changes in optical properties such as light absorption are used to determine It is common to analyze inspection items.
- absorption analysis of an automatic analyzer light from a light source is irradiated onto a sample or a reaction solution in which a sample and a reagent are mixed, and the amount of light transmitted through the sample or reaction solution at a single or multiple measurement wavelengths is detected by a light receiving element.
- a method is used in which the absorbance is calculated by measurement, and the component amount is obtained from the relationship between the absorbance and the concentration.
- LEDs light emitting diodes
- Patent Document 1 discloses a first LED chip that emits a luminous flux in a first wavelength band, and a phosphor provided on the luminous flux of the first LED chip. , and a second LED chip that emits light in a second wavelength band.
- An object of the present invention is to provide a light source and an automatic analyzer that cover a wide range of wavelength bands used in the automatic analyzer and stabilize the amount of light.
- the light source of the present invention comprises a substrate, a first LED provided on the substrate, and a phosphor that converts the excitation light of the first LED into broadband light, A temperature sensor was embedded in the phosphor along with the first LED.
- FIG. 2 is a cross-sectional view showing the configuration of the light source according to Example 1;
- the top view which shows an example of arrangement
- FIG. 5 is a plan view showing the arrangement of temperature sensors in the light source of the comparative example;
- surface which shows the result of having measured the time until light amount drift stabilizes from lighting of LED.
- 5 is a flow chart showing an example of a procedure for stabilizing the amount of light in the light source according to the first embodiment
- FIG. 5 is a cross-sectional view showing the configuration of a light source according to Example 2
- 9 is a flow chart showing an example of a procedure for stabilizing the amount of light in the light source according to the second embodiment;
- FIG. 1 is a schematic diagram showing the overall configuration of the automatic analyzer.
- the automatic analyzer includes three types of discs, a sample disc 103, a reagent disc 106, and a reaction disc 109, a dispensing mechanism for moving samples and reagents between these discs, and a control circuit for controlling them.
- a light intensity measurement circuit 202 that measures the absorbance of the reaction liquid
- a data processing unit 203 that processes data measured by the light intensity measurement circuit 202
- an input unit 204 that is an interface with the data processing unit 203
- the dispensing mechanism also includes a sample dispensing mechanism 110 and a reagent dispensing mechanism 111 .
- the data processing unit 203 includes an information recording unit 2031 and an analysis unit 2032.
- the information recording unit 2031 stores control data, measurement data, data used for data analysis, analysis result data, and the like.
- the data processing unit 203 may be implemented using a computer.
- the computer includes at least a processor such as a CPU (Central Processing Unit) and an information recording section 2031 .
- the processing of the analysis unit 2032 may be realized by storing program codes corresponding to the data processing in the information recording unit 2031 and executing each program code by a processor.
- the input unit 204 and the output unit 205 input/output data to/from the information recording unit 2031 .
- the input unit 204 is an information input device such as a keyboard, touch panel, numeric keypad, or the like.
- the output unit 205 is a device for the user of the automatic analyzer to check the analysis results, and is, for example, a display.
- sample cups 102 sample containers containing samples 101 are arranged on the circumference of the sample disk 103 .
- Sample 101 is, for example, blood.
- a plurality of reagent bottles 105 reagent containers containing reagents 104 are arranged on the circumference of the reagent disk 106 .
- a plurality of reaction cells 108 reaction containers containing a reaction liquid 107 in which the sample 101 and the reagent 104 are mixed are mounted on the circumference of the reaction disk 109 .
- the sample pipetting mechanism 110 is a mechanism used when moving a certain amount of the sample 101 from the sample cup 102 to the reaction cell 108 .
- the sample dispensing mechanism 110 includes, for example, a nozzle that ejects or aspirates a solution, a robot that positions and transports the nozzle at a predetermined position, a pump that ejects or aspirates the solution from the nozzle to the nozzle, and a channel that connects the nozzle and the pump. , consists of
- the reagent dispensing mechanism 111 is a mechanism used when moving a certain amount of the reagent 104 from the reagent bottle 105 to the reaction cell 108 .
- the reagent dispensing mechanism 111 also includes, for example, a nozzle that ejects or aspirates a solution, a robot that positions and transports the nozzle at a predetermined position, a pump that ejects or aspirates the solution from or to the nozzle, and a channel that connects the nozzle and the pump. , consists of
- the stirring unit 112 is a mechanical unit that stirs and mixes the sample 101 and the reagent 104 within the reaction cell 108 .
- the cleaning unit 114 is a mechanical unit that discharges the reaction liquid 107 from the reaction cell 108 that has completed the analysis process, and then cleans the reaction cell 108 . After cleaning, the next sample 101 is dispensed again from the sample dispensing mechanism 110, and a new reagent 104 is dispensed from the reagent dispensing mechanism 111 into the reaction cell 108 for use in another reaction process. .
- the reaction cells 108 are immersed in a constant temperature fluid 115 in a constant temperature bath whose temperature and flow rate are controlled. Therefore, the reaction cell 108 and the reaction liquid 107 therein are kept at a constant temperature by the control circuit 201 even while being moved by the reaction disk 109 .
- Water or air, for example, is used as the constant temperature fluid 115 .
- an absorbance measuring unit 113 (absorbance photometer) is arranged for performing absorption analysis in the automatic analyzer.
- FIG. 2 is a diagram showing the configuration of an absorbance measurement unit that performs absorbance analysis of an automatic analyzer.
- Light generated from a light source 301 for absorption analysis is emitted along an optical axis 401 , condensed by a condensing lens 403 , and irradiated to the reaction cell 108 .
- the light source side slit 402 may be arranged to limit the width of the light emitted from the light source 301 in order to make the light amount distribution in the irradiation surface uniform.
- the light transmitted through the reaction liquid 107 in the reaction cell 108 is separated by the diffraction grating 3021 in the spectrometer 302 and received by the detector array 3022 having a large number of light receivers.
- a spectroscope-side slit 404 may be arranged to prevent such stray light from entering the spectroscope 302 .
- Examples of measurement wavelengths received by the detector array 3022 include 340 nm, 376 nm, 405 nm, 415 nm, 450 nm, 480 nm, 505 nm, 546 nm, 570 nm, 600 nm, 660 nm, 700 nm, 750 nm, and 800 nm.
- Light reception signals from these light receivers are transmitted to the information recording section 2031 of the data processing section 203 through the light amount measurement circuit 202 .
- the amount of components such as proteins, sugars, and lipids contained in the sample 101 is calculated according to the following procedure.
- the control circuit 201 instructs the cleaning section 114 to clean the reaction cell 108 .
- the control circuit 201 causes the sample dispensing mechanism 110 to dispense a given amount of the sample 101 in the sample cup 102 into the reaction cell 108 .
- the control circuit 201 causes the reagent dispensing mechanism 111 to dispense a fixed amount of the reagent 104 in the reagent bottle 105 into the reaction cell 108 .
- the control circuit 201 rotates the sample disk 103, the reagent disk 106, and the reaction disk 109 by the corresponding drive units. At this time, the sample cup 102, the reagent bottle 105, and the reaction cell 108 are positioned at predetermined dispensing positions according to the driving timing of the dispensing mechanism corresponding to each.
- control circuit 201 controls the stirring unit 112 to stir the sample 101 and the reagent 104 dispensed into the reaction cell 108 to generate the reaction liquid 107 .
- the reaction disk 109 rotates, the reaction cell 108 containing the reaction liquid 107 passes through the measurement position where the absorbance measurement unit 113 is arranged.
- the amount of transmitted light from the reaction liquid 107 is measured via the absorbance measuring section 113 each time the measuring position is passed.
- the measured data are sequentially output to the information recording unit 2031 and accumulated as reaction process data.
- reaction process data acquired at regular time intervals are stored in the information recording unit 2031 .
- FIG. 3 is a cross-sectional view showing the configuration of the light source according to Example 1.
- the light source 301 according to the present embodiment includes a substrate 503, a temperature adjustment section 504 for adjusting the temperature of the substrate 503, and the temperature adjustment section 504 mounted on the substrate 503 on the side opposite to the temperature adjustment section 504.
- a first LED 501 and a second LED 502 are provided.
- the first LED 501 is a blue LED that emits light around a wavelength of 385 nm
- the second LED 502 is an ultraviolet light LED that emits ultraviolet light around a wavelength of 340 nm.
- a phosphor 506 is provided that converts the excitation light of the first LED 501 into broadband light with a wavelength of 370 nm to 800 nm and emits it.
- the light source 301 of this embodiment has a dichroic filter 507 which is incident on the straight optical path of the first LED 501 at an incident angle of 45°, and further has a dichroic filter 507 on the straight optical path of the second LED 502 at an incident angle of 45°. It has a reflector 508, for example a mirror, which is incident on the .
- the ultraviolet light from the second LED 502 reflected by the reflector 508 is reflected again by the dichroic filter 507, and is combined with the light of 370 nm to 800 nm wavelength-converted by the phosphor 506 by the excitation light of the first LED 501 as combined light.
- the light is emitted from the light source 301 along one optical path.
- the method of synthesizing light shown in FIG. 3 is an example, and includes a method in which the locations of the dichroic filter 507 and the reflector 508 are exchanged, a method in which another reflector is used, and a light rod that mixes the light from two LEDs. and the like.
- the substrate 503 has the role of supplying power to the first LED 501 and the second LED 502 and balancing the temperatures of the two LEDs and the temperature adjustment section 504 .
- the substrate 503 is preferably made of a metal such as aluminum or copper as a base material.
- the first LED 501 and the second LED 502 are mounted on a single metal substrate 503 with high thermal conductivity, so that the common temperature fluctuation characteristic is obtained by the temperature control of the temperature adjustment unit 504. can get. That is, the temperatures of the first LED 501 and the second LED 502 can be relatively easily controlled by the temperature adjustment section 504 .
- a phosphor 506 for converting the excitation light of the first LED 501 into broadband light and emitting the broadband light is provided on the substrate 503 so as to cover the first LED 501 .
- the temperature sensor 505 is embedded in the phosphor 506 together with the first LED 501 .
- the temperature sensor 505 is, for example, a thermistor, a thermocouple, a resistance temperature detector, a semiconductor sensor, or the like. It is also conceivable to short the ground side of the temperature sensor 505 and the cathode side of the LED to reduce the noise difference between the temperature sensor 505 and the LED.
- a metal block containing constant temperature fluid or a Peltier element is used for the temperature adjustment unit 504 .
- feedback control of the temperature sensor 505 via the control circuit 201 can control the substrate 503 side of the temperature adjustment unit 504 with a high accuracy of, for example, about 37 ⁇ 0.01.degree.
- the light source 301 of the present embodiment has a configuration in which the first LED 501 and the second LED 502 are provided on the same substrate 503, by installing the temperature sensor 505 between these two LEDs, 1 Control is possible with one temperature sensor 505 .
- the amount of emitted light wavelength-converted by the phosphor 506 by the excitation light of the first LED 501 and the amount of emitted light from the second LED 502 tend to have common fluctuation characteristics.
- FIG. 4 is a plan view showing an example of the arrangement of temperature sensors.
- the positions of the first LED 501 and the second LED 502 on the substrate 503 are determined under the restrictions of the arrangement of optical components such as dichroic filters, mirrors and lenses.
- the position of the temperature sensor 505 is determined by the balance between the amount of heat generated from the first LED 501 and the amount of heat generated from the second LED 502 .
- the temperature sensor 505 is arranged so as to be closer to the one of the two LEDs that generates the larger amount of heat.
- the amount of heat generated by the first LED 501 is Q1
- the amount of heat generated by the second LED 502 is Q2
- the center position of the first LED 501 is O1
- the center position of the second LED 502 is O2
- the distance between the centers is L.
- the temperature sensor 505 is arranged at a position where L is divided from O1 to O2 by a ratio of Q2:Q1.
- the thermal conductivity of the substrate 503 is assumed to be high enough that the heat generated by the first LED 501 and the heat generated by the second LED 502 are easily in thermal equilibrium.
- the position where the temperature sensor 505 is arranged is close to the temperature center of gravity, that is, the position corresponding to the average temperature of the light source 301, which is the structure composed of each LED and its mounting substrate. Therefore, by feeding back this average temperature to the temperature adjustment unit 504 such as a Peltier element via the control circuit 201, the temperature of the light source 301 as a whole can be controlled with high precision, and the light intensity can be stabilized.
- the light source provided with two LEDs was described, but even in the case of a light source provided with three or more LEDs, as described above, the heat generation amount of each LED is taken into consideration. A temperature sensor should be placed.
- a blue LED with a center wavelength of 385 nm (driven at a current of 600 mA) is used as the first LED 501, and white light is emitted from the phosphor 506 by its excitation light, while the second LED 502
- An ultraviolet light LED (driven at a current of 160 mA) with a central wavelength of 340 nm was used.
- a dichroic filter 507 and a reflector 508 are arranged in the same manner as in the configuration shown in FIG.
- a Peltier element having a cooling surface of 20 mm ⁇ 20 mm was used in the temperature control unit 504, and the temperature of the cooling surface was controlled to 37 ⁇ 0.01°C. Then, on the substrate 503 made of aluminum on which each LED was mounted, pattern wiring was applied via an insulating film (resist).
- the location of the thermistor which is the temperature sensor 505
- is changed in Comparative Example and Example 1 to measure the time until the amount of light stabilizes and compare.
- a 10-minute light intensity drift (how much the light intensity changes in 10 minutes) at a single wavelength was used, which is an index for stable absorption analysis.
- the single wavelengths are 340 nm, 376 nm, 415 nm, 450 nm, 480 nm, 505 nm, 546 nm, 570 nm, 600 nm, 660 nm, 700 nm, 750 nm and 800 nm.
- FIG. 5 is a plan view showing the arrangement of temperature sensors in the light source of the comparative example. As shown in FIG. 5, in the light source of the comparative example, the temperature sensor 505 is not embedded in the phosphor 506 unlike the first example, and is positioned outside the phosphor 506 .
- FIG. 6 is a table showing the results of measuring the time from the lighting of the LED until the light amount drift stabilizes. As shown in FIG. 6, it can be seen that Example 1 takes less time to stabilize the amount of light than Comparative Example. This result is believed to support the fact that embedding the temperature sensor 505 in the phosphor 506 enables the amount of light emitted from the phosphor 506 to be controlled with high accuracy, and stabilizes the amount of light more quickly.
- the means for stabilizing the amount of light will be explained.
- the light intensity of the light source is constant.
- temperature control of the substrate 503 by the temperature adjustment unit 504 and drive current control of the LED are provided as means for keeping the light amount constant.
- an AlGaN crystal which is a compound semiconductor, is used as an LED that generates ultraviolet light with a wavelength of 340 nm or less.
- the light-emitting efficiency of the ultraviolet LED is several times to one tenth of the light-emitting efficiency of the InGaN crystal used for the light-emitting layer of a general white LED.
- the AlGaN crystal light-emitting layer has the characteristic that most of the input power becomes heat. Moreover, the higher the operating temperature of the LED and the longer the operating time, the more defects are formed in the semiconductor crystal, and the light intensity of the LED decreases over time.
- the lifetime of LEDs using AlGaN crystals tends to be shorter than that of LEDs using InGaN crystals.
- the specification value of the time L70 for the light intensity to decrease to 70% is usually determined when used at a package bottom surface temperature of 25 ° C.
- L70 is 10,000 hours or more.
- L70 becomes shorter according to the Arrhenius model as the operating temperature rises. That is, by using the temperature control unit 504 such as a Peltier device to lower the temperature of the substrate itself on which the LED is mounted, the light amount increases and the life of the LED can be lengthened.
- the light intensity of the LED can also be increased by increasing the drive current.
- FIG. 7 is a flow chart showing an example of the procedure for stabilizing the amount of light in the light source according to the first embodiment.
- the light source 301 starts lighting (step S602).
- the dispensing mechanism dispenses water to any reaction cell 108 (step S603).
- the absorbance measurement unit 113 controls the driving current of the LED and the temperature control of the substrate 503 by the temperature adjustment unit 504 (step S604).
- the absorbance measuring unit 113 measures the absorbance of the reaction cell 108 (step S605), and determines whether or not the amount of light that satisfies the specified value is obtained (step S606).
- step S606 when the amount of light that satisfies the specified value is obtained, absorbance analysis is started (step S607).
- the absorbance measurement unit 113 is controlled by the control circuit 201 , and the light amount data of the light amount measurement circuit 202 is obtained from the information recording unit 2031 .
- As temperature data not only the temperature sensor 505 embedded in the phosphor 506, but also another temperature sensor not embedded in the phosphor 506, for example, a temperature sensor for measuring the installation environment temperature of the automatic analyzer. A measured temperature may be used.
- temperature control of the substrate 503 by the temperature adjustment unit 504, drive current control of the LED, and heating control of the phosphor 506 by the heater 601 are provided as means for keeping the amount of light constant.
- This embodiment is particularly effective when the temperature control of the entire light source 301 , especially the temperature control of the phosphor 506 , is insufficient only with the LED drive current control and the temperature control unit 504 such as a Peltier element.
- the types of the heater 601 include, for example, rubber heaters, film heaters, cartridge heaters, sheath heaters, and the like.
- FIG. 8 is a cross-sectional view showing the configuration of the light source according to Example 2.
- the light source 301 according to the present embodiment includes a substrate 503, a temperature adjustment section 504 for adjusting the temperature of the substrate 503, and the temperature adjustment section 504 mounted on the substrate 503 on the side opposite to the temperature adjustment section 504. and a heater 601 capable of directly heating the phosphor 506 . Therefore, by feeding back the temperature data acquired by the temperature sensor 505 to the control of the heater 601 as well, it is possible to shorten the time from when the LED is turned on until the amount of light is stabilized.
- the light intensity of the light source 301 is in a stable state. be. Therefore, if the phosphor 506 is heated by the heater 601 so as to reach that temperature, the amount of light can be efficiently stabilized. In particular, when the phosphor 506 is heated (preheated) by the heater 601 before the LED starts lighting, the time until the light amount stabilizes is further shortened.
- FIG. 9 is a flow chart showing an example of the procedure for stabilizing the amount of light in the light source according to the second embodiment.
- the automatic analyzer starts up (step S701).
- the initial values of the LED drive current value, the temperature setting value of the temperature adjustment unit 504 that controls the temperature of the substrate 503, and the temperature setting value of the heater 601 that preheats the phosphor 506 are A value is determined (step S702).
- the absorbance measurement unit 113 controls the drive current of the LED and the temperature control of the substrate 503 by the temperature adjustment unit 504 based on the temperature data acquired by the temperature sensor 505.
- step S704 the analysis unit 2032 uses the temporal data change in the temperature acquired from the temperature sensor 505 in step S705 and the temporal change in the absorbance (light amount) measured by the absorbance measurement unit 113 in step S706. do the analysis. Then, in step S707, when the absorbance measurement unit 113 determines that the amount of light does not satisfy the specified value, based on the analysis result of the analysis unit 2032, the LED drive current value, the temperature setting value of the temperature adjustment unit 504, and the heater 601 temperature set point is adjusted. On the other hand, when the absorbance measurement unit 113 determines in step S707 that the light amount satisfies the specified value, absorbance analysis is started (step S708).
- the PID parameter is determined using the temperature data measured by the temperature sensor 505.
- the ambient temperature is 25° C.
- the temperature setting value (target value) of the temperature adjustment unit 504 is 37° C.
- temperature control targeting 37° C. takes time until the amount of light stabilizes. Therefore, when temperature data changes slowly over time (that is, it takes time to stabilize the light intensity), it may be preferable to perform temperature control of PID parameters with a target value of 42° C., for example. In this way, it is possible to shorten the time until the amount of light stabilizes by acquiring and analyzing data changes in temperature over time as needed.
- the present invention is not limited to the above-described embodiment, and includes various modifications.
- each of the embodiments described above has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to those having all the configurations described.
- it is possible to replace part of the configuration of one embodiment with the configuration of another embodiment and it is also possible to add the configuration of another embodiment to the configuration of one embodiment.
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Abstract
Description
Claims (9)
- 基板と、
前記基板上に設けられる第1のLEDと、
前記第1のLEDの励起光を広帯域光に変換する蛍光体と、を備え、
温度センサが、前記第1のLEDとともに、前記蛍光体に埋め込まれている光源。 - 請求項1に記載の光源において、
前記基板上に設けられる第2のLEDをさらに備え、
前記温度センサは、前記第1のLEDと前記第2のLEDの間に配置されることを特徴とする光源。 - 請求項2に記載の光源において、
前記温度センサは、前記第1のLEDおよび前記第2のLEDのうち、発熱量の大きい方に近くなるように配置されることを特徴とする光源。 - 請求項1に記載の光源において、
前記蛍光体を加温するヒータをさらに備えることを特徴とする光源。 - 請求項4に記載の光源において、
前記第1のLEDの点灯前に、前記蛍光体が前記ヒータによって加温されることを特徴とする光源。 - 請求項4に記載の光源において、
前記基板に対して前記第1のLEDと反対側に温度調整部をさらに備え、
前記温度センサで測定した温度を用いて、前記第1のLED、前記ヒータおよび前記温度調整部が制御されることを特徴とする光源。 - 請求項6に記載の光源において、
前記温度センサとは別に、前記蛍光体に埋め込まれていない環境温度センサを有し、
前記温度センサおよび前記環境温度センサで測定した温度を用いて、前記第1のLED、前記ヒータおよび前記温度調整部が制御されることを特徴とする光源。 - 請求項6に記載の光源において、
前記温度センサで測定した温度の経時的な変化に応じて、前記第1のLED、前記ヒータおよび前記温度調整部が制御されることを特徴とする光源。 - 請求項1に記載の光源を有する吸光度測定部と、
前記吸光度測定部によって測定される反応液を収容する反応容器が搭載される反応ディスクと、を備えた自動分析装置。
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