JP5181689B2 - Near-infrared light and infrared light spectrometer - Google Patents

Description

  The present invention relates to a spectroscopic analyzer for near-infrared light and infrared light.

  Conventionally, a near-infrared spectrometer that analyzes light detected by irradiating a sample with near-infrared light and an infrared spectrometer that analyzes light detected by irradiating a sample with infrared light are known. It has been. The near-infrared region (wavelength 0.7 to 2.5 [μm]) and the infrared region (wavelength 2.5 to 25 [μm]) were analyzed using the separate spectroscopes. A method of analyzing light detected by irradiating a sample with near infrared and visible light using a near infrared spectroscopic analyzer has been considered (for example, see Patent Document 1).

  FIG. 8 shows characteristics of a spectroscope, a detector, a transmission optical path, a window material, and a path length in spectroscopic analysis of near-infrared light and infrared light. The reason for using separate spectrometers for the near-infrared light and infrared light is that, as shown in FIG. 8, a spectrometer and detector used for spectrum measurement and analysis with near-infrared light and infrared light. This is because it is difficult to use the same spectrometer because the transmission optical path, window material, path length, and the like are different.

  In the infrared light, the spectroscope is almost unified to FTIR (Fourier Transform InfraRed spectroscopy) in the past 30 years. The transmission optical path is characterized in that an infrared optical fiber is expensive and lacks reliability. As for the window material, selection of the window material has been limited because many infrared materials are deliquescent and more expensive than near infrared light. Regarding the path length, the same path length could not be used for near-infrared light and infrared light.

  Moreover, since near-infrared light and infrared light have different absorbances (sensitivity of several hundred to 1,000 times infrared light is good), it was impossible to measure with the same sample thickness. For this reason, the near-infrared spectroscopy analyzer is generally designed to be applicable to the near-infrared region using a quartz optical fiber as described above, and the analysis wavelength cannot be extended to the infrared region.

FIG. 9 shows the spectral distribution of toluene (C ₇ H ₈ ) by the near-infrared spectrometer and infrared spectrometer. As shown in FIG. 9, the absorbance with respect to wave number as a spectrum is measured separately, such as a near infrared light spectrum measured with a near infrared analyzer and an infrared light spectrum measured with an infrared spectroscopic analyzer. It had been.
JP 2005-291704 A

  In recent years, there is a need to measure the same sample with near infrared light and infrared light. However, conventional near-infrared light and infrared light spectroscopic analyzers are treated as completely different, and the analyzer is used to measure the same sample with near-infrared light and infrared light. There wasn't.

  In order to measure the same sample with near-infrared light and infrared light, analyzers must be prepared for and measured with near-infrared light and infrared light, respectively. It was difficult to handle.

  An object of the present invention is to collectively measure a near infrared light spectrum and an infrared light spectrum.

In order to solve the above problems, the near-infrared light and infrared light spectroscopic analyzer of the invention according to claim 1 is:
A light source section for emitting near-infrared light and infrared light,
A near-infrared light spectrum measurement unit that irradiates a sample with light emitted from the light source unit to measure a near-infrared light spectrum and outputs near-infrared light spectrum data; and
Irradiating the sample with the light emitted from the light source unit to measure infrared light spectrum and outputting infrared light spectrum data; and
A switching unit that switches the emission destination of the light emitted from the light source unit to the near-infrared light spectrum measurement unit or the infrared light spectrum measurement unit;
A control unit that controls the switching unit to alternately switch the emission destination of the light emitted from the light source unit between the near-infrared light spectrum measurement unit and the infrared light spectrum measurement unit ;
Based on the near-infrared light spectrum data and infrared light spectrum data output from the near-infrared light spectrum measurement unit and the infrared light spectrum measurement unit, an analysis unit that analyzes spectrum data , and
Based on the output near-infrared light spectrum data and infrared light spectrum data, the analysis unit, infrared light spectrum data at the same time as the measurement time of the near-infrared light spectrum data and infrared light spectrum data And the near infrared light spectrum data is calculated and interpolated, and the output near infrared light spectrum data and the interpolated infrared light spectrum data at the same time are synthesized, and the output infrared light spectrum is synthesized. Data and the interpolated near-infrared spectrum data at the same time are synthesized .

The invention according to claim 2 is a spectroscopic analysis device for near-infrared light and infrared light according to claim 1 ,
The infrared spectrum measuring unit includes at least one of a light pipe and an optical fiber as an optical transmission path.

  According to the first aspect of the present invention, the near infrared light spectrum and the infrared light spectrum can be measured and analyzed together.

In addition , by creating infrared and near-infrared spectrum data at the same time from alternately measured infrared and near-infrared spectrum data, it is possible to create a more advanced calibration curve and predict the sample concentration. Become.

According to the second aspect of the present invention, it is possible to transmit light stably and efficiently by using the light pipe as the optical transmission line. Further, by using an optical fiber as the optical transmission line, attenuation of light can be reduced and the degree of freedom of the optical transmission line can be increased.

  Embodiments and modifications according to the present invention will be described below in order with reference to the drawings. However, the scope of the invention is not limited to the illustrated examples.

  With reference to FIG. 1, the apparatus structure of the near-infrared-light and infrared-light spectroscopy analyzer 1 of embodiment which concerns on this invention is demonstrated. In FIG. 1, the structure of the spectrum measurement part of the near-infrared-light and infrared-light spectroscopy analyzer 1 of this Embodiment is shown. In FIG. 1, the analysis portion of the near-infrared light and infrared light spectroscopic analyzer 1 is omitted.

  As shown in FIG. 1, the near-infrared light and infrared light spectroscopic analyzer 1 includes a FTIR 10 serving as a spectroscope unit, an optical switch 20, an infrared light spectrum measurement unit 30, and a near-infrared light spectrum measurement. Unit 40. The infrared light spectrum measurement unit 30 includes a light pipe 31, an infrared light detector 32, a light pipe 33, an ATR (Attenuated Total Reflection) probe 34, and a light pipe 35. Is done. The near infrared light spectrum measurement unit 40 includes a light pipe 41, an optical fiber 42, a near infrared light probe 43, an optical fiber 44, and a near infrared light detector 45.

  The FTIR 10 is connected to the optical switch 20. The optical switch 20 is connected to the infrared light spectrum measurement unit 30 and the near infrared light spectrum measurement unit 40. More specifically, the optical switch 20 is connected to the ATR probe 34 through the light pipes 31 and 33 in order, and the ATR probe 34 is connected to the infrared light detector 32 through the light pipes 33 and 35 in order. Further, the optical switch 20 is connected to the near-infrared light probe 43 through the light pipe 41 and the optical fiber 42 in order, and the near-infrared light probe 43 is connected to the near-infrared light detector 45 through the optical fiber 44.

In advance, the ATR probe 34 and the near-infrared light probe 43 are immersed in the same sample such as a liquid to be analyzed. The FTIR 10 is a broadband FTIR, for example, a FTIR having a wave number of 12000 to 1200 [cm ⁻¹ ], and emits light having a near infrared light component and an infrared light component. The light emitted from the FTIR 10 is switched to the infrared light spectrum measurement unit 30 or the near infrared light spectrum measurement unit 40 by the optical switch 20.

  When the optical switch 20 is switched to the infrared spectrum measuring unit 30 side, the light emitted from the FTIR 10 enters the ATR probe 34 via the light pipes 31 and 33. In the ATR probe 34, the incident light is reflected by the surface in contact with the sample, and the reflected light is emitted. The light emitted from the ATR probe 34 enters the infrared light detector 32 through the light pipes 33 and 35. In the infrared light detector 32, incident light is converted into an analog electrical signal indicating the spectral characteristics of infrared light and output.

  When the optical switch 20 is switched to the near-infrared light spectrum measuring unit 40 side, the light emitted from the FTIR 10 enters the near-infrared light probe 43 via the light pipe 41 and the optical fiber 42. In the near-infrared light probe 43, the incident light is transmitted through the sample, and the transmitted light is reflected by the mirror in the near-infrared light probe 43 and emitted. Light emitted from the near-infrared light probe 43 is incident on a near-infrared light detector 45 via an optical fiber 44. In the near-infrared light detector 45, the incident light is converted into an analog electric signal indicating the spectral characteristics of the near-infrared light and output.

  Next, the overall configuration of the near-infrared light and infrared light spectroscopic analysis apparatus 1 including the analysis portion will be described with reference to FIG. FIG. 2 shows the overall configuration of the near-infrared light and infrared light spectroscopic analyzer 1.

  As shown in FIG. 2, the near-infrared light and infrared light spectroscopic analyzer 1 includes an FTIR 10, an optical switch 20, an infrared light spectrum measurement unit 30, a near-infrared light spectrum measurement unit 40, and a switch. 50, an AD (Analog to Digital) converter 60, and a PC (Personal Computer) 70 as an analysis unit. The FTIR 10 includes a controller 11 as a control unit, an interferometer 12, a sample chamber 13, and a detector 14.

The controller 11 controls each part in the FTIR 10 based on a control signal input from the PC 70, and controls the optical switch 20 and the switch 50. The interferometer 12 is a Michelson interferometer, and includes a light source and an optical system such as a half mirror, and emits light for spectrum measurement. The light source of the interferometer 12 is, for example, a tungsten lamp or a ceramic rod. From this light source, light including both near infrared light and infrared light is emitted. The half mirror interferometer 12, for example, it is assumed that CaF ₂ (calcium fluoride). In the interferometer 12, the light emitted from the light source and interfered by the optical system is emitted as pure light capable of Fourier transform.

  In the sample chamber 13, a sample to be measured is set. The light emitted from the interferometer 12 is incident on and transmitted through the sample set in the sample chamber 13. The detector 14 converts the transmitted light from the sample set in the sample chamber 13 into an electrical signal indicating spectral characteristics. In the present embodiment, the sample chamber 13 and the detector 14 are not used, and the light emitted from the interferometer 12 is incident on the optical switch 20.

  The infrared light spectrum measurement unit 30 is a component for infrared spectrum measurement, the near infrared light spectrum measurement unit 40 is a component for near infrared light spectrum measurement, and the light emitted from the interferometer 12 Is light including infrared light and near infrared light. For this reason, the infrared light spectrum measuring unit 30 and the near infrared light spectrum measuring unit 40 can perform spectrum measurement of both infrared light and near infrared light without exchanging the light source of the interferometer 12.

  The switch 50 has a first terminal on one end side connected to the infrared light detector 33, a second terminal on one end side connected to the near infrared light detector 45, and a terminal on the other end side connected to the AD converter. 60. That is, the input source of the analog signal input to the AD converter 60 is switched to the infrared light detector 33 or the near infrared light detector 45 by the switching control of the switch 50 by the controller 11.

  The AD converter 60 converts the analog signal input from the infrared light detector 33 or the near infrared light detector 45 via the switch 50 into a digital signal, and outputs the digital signal to the PC 70.

  Next, the internal configuration of the PC 70 will be described with reference to FIG. FIG. 3 shows the internal configuration of the PC 70.

  As shown in FIG. 3, the PC 70 includes a CPU (Central Processing Unit) 71, an input unit 72, a RAM (Random Access Memory) 73, a display unit 74, an HDD (Hard Disk Drive) 75, and a communication unit 76. And I / Fs (interfaces) 77 and 78, and each part is connected via a bus 79.

  The CPU 71 centrally controls each part of the PC 71. The CPU 71 reads a designated program out of the system program and application program stored in the HDD 75 and develops it in the RAM 73. Various processes are executed in cooperation with the program developed in the RAM 73 and the CPU 71.

  Further, the CPU 71 generates a control signal for controlling the FTIR 10, the optical switch 20, and the switch 50 and transmits the control signal to the FTIR 10 via the I / F 78.

  The input unit 72 includes a keyboard and a pointing device such as a mouse, receives key operation input and position operation input from the user, and outputs the operation input signal to the CPU 71.

  The RAM 73 is a volatile memory and has a work area for temporarily storing various data and various programs. The RAM 73 stores an infrared light spectrum storage area 731 for storing infrared light spectrum data input from the AD converter 60 and a near infrared light for storing near infrared light spectrum data input from the AD converter 60. An optical spectrum storage area 732. The spectral data of infrared light and near infrared light is associated with the spectral data measurement time of the infrared light spectrum measuring unit 30 or the near infrared light spectrum measuring unit 40, or the infrared light spectrum storage region 731 or near red. It is assumed that it is stored in the outside light spectrum storage area 732.

  The HDD 75 has a magnetic recording medium and stores various data and various programs so as to be readable and writable. The HDD 75 stores a spectrum measurement program and an analysis program described later. The communication unit 76 is connected to a communication network such as a LAN (Local Area Network) and transmits / receives information to / from an external device on the communication network.

  The I / F 77 is an interface connected to the AD converter 60 for communication. The spectrum data of infrared light or near infrared light input from the AD converter 60 is input to the CPU 71 via the I / F 77. The I / F 78 is an interface connected to the FTIR 10 for communication. A control signal for controlling the FTIR 10 and the like output from the CPU 71 is output to the controller 11 of the FTIR 10 via the I / F 78.

  Next, the operation of the near-infrared light and infrared light spectral analyzer 1 will be described. First, the ATR probe 34 and the near infrared light probe 43 are immersed in the sample to be measured. Then, for example, triggered by the input of an infrared light and near-infrared spectrum measurement processing instruction from the user via the input unit 72 of the PC 70, the data is read from the HDD 75 and appropriately expanded in the RAM 73. The spectrum measurement process is started in cooperation with the spectrum measurement program and the CPU 71.

  In the spectrum measurement process, the CPU 71 of the PC 70 generates control signals for the optical switch 20 and the switch 50 via the controller 11 and transmits them to the controller 11 via the I / F 78. In the FTIR 10, the optical switch 20 is alternately switched by the control of the controller 11 based on the control signal received from the CPU 71 of the PC 70. Then, the infrared light spectrum measuring unit 30 and the near infrared light spectrum measuring unit 40 alternately measure the spectrum data of the infrared light or near infrared light of the sample. That is, the analog signal indicating the infrared light spectrum data from the infrared light detector 33 and the analog signal indicating the near infrared light spectrum data from the near infrared light detector 45 are alternately output. Further, under the control of the controller 11, the switch 50 is switched to the side where the analog signal indicating the spectrum data is output in synchronization with the switching of the optical switch 20.

  The analog signal indicating the infrared spectrum data output from the switch 50 and the analog signal indicating the near infrared spectrum data are AD-converted by the AD converter 60, and the digital infrared spectrum data and the near infrared spectrum are converted. It is output alternately as light spectrum data. The infrared light spectrum data and the near-infrared light spectrum data output from the AD converter 60 are alternately input to the PC 70, and the infrared light spectrum data is stored in the infrared light spectrum storage area 731 together with the measurement time. Then, near-infrared spectrum data is stored in the near-infrared spectrum storage area 732 together with the measurement time.

  In the PC 70, an analysis process for analyzing spectrum data of infrared light and near infrared light is executed. Here, the analysis process will be described with reference to FIGS. 4 and 5. FIG. 4 shows the flow of analysis processing. FIG. 5 shows a flow of spectral data synthesis.

  In the PC 70, for example, with the input of the spectrum measurement process start instruction as a trigger, the analysis process is executed in cooperation with the CPU 71 and the analysis program read from the HDD 75 and appropriately expanded in the RAM 73.

  As shown in FIG. 4, first, the infrared light spectrum data stored in the infrared light spectrum storage area 731 of the RAM 73 and the near infrared light spectrum data stored in the near infrared light spectrum storage area 732 are read. And synthesized (step S1). Here, with reference to FIG. 5, the synthesis process of the infrared-light spectrum data and near-infrared-light spectrum data of step S1 is demonstrated concretely. As a spectrum synthesis method, near infrared light spectrum data and infrared light spectrum data can be added together, but the following synthesis process is used.

  In FIG. 5, the near infrared light spectrum data measured by the near infrared light spectrum measurement unit 40 is indicated by “NIR”, and the infrared light spectrum data measured by the infrared light spectrum measurement unit 30 is indicated by “IR”. Show. An example in which near-infrared light spectrum data is first measured will be described. Near-infrared spectrum data and infrared spectrum data are spectral distribution data of absorbance with respect to wave number.

  Corresponding to the measurement time, near infrared light spectrum data and infrared light spectrum data are alternately stored in the RAM 73 (infrared light spectrum storage area 731 and near infrared light spectrum storage area 732). Here, based on the measured near-infrared light and infrared spectrum data, the near-infrared light or infrared spectrum data at the same time that is not measured is interpolated to obtain near-infrared light at the same time. Create spectral data of light or infrared light. Here, an example in which infrared light or near-infrared spectrum data at the same time is calculated and interpolated from the previous two measured near-infrared light or infrared spectrum data will be described. However, it is not limited to this example.

  In FIG. 5, it is assumed that the near infrared light spectrum data a1, the infrared light spectrum data b1, the near infrared light spectrum data a2, the infrared light spectrum data b2,. .

  In the PC 70, first, corresponding to the infrared light spectrum data b1, as an average value of the near infrared light spectrum data a1 at the previous time and the near infrared light spectrum data a2 at the next time. The average near-infrared light spectrum data c1 at the same time as the infrared light spectrum data b1 is calculated. Then, the average near-infrared light spectrum data c1 and the infrared light spectrum data b1 are synthesized by addition of absorbance to generate synthesized spectrum data e1.

  Then, in correspondence with the near-infrared light spectrum data a2, as the average value of the infrared light spectrum data b1 at the previous time and the infrared light spectrum data b2 at the next time, the near-infrared light is obtained. Average infrared light spectrum data d1 at the same time as the light spectrum data a2 is calculated. Then, the average infrared light spectrum data d1 and the near-infrared light spectrum data a2 are combined by adding the absorbance, and the combined spectrum data e2 at the same time is generated. Similarly, near-infrared light spectrum data and infrared light spectrum data are combined to generate combined spectrum data one after another.

  Returning to FIG. 4, after execution of step S1, spectrum analysis and calibration curve generation are executed based on the infrared spectrum data, near-infrared spectrum data, and the synthesized spectrum data generated in step S1 (step S2). ). Step S2 may be realized, for example, by executing an existing analysis software program.

  In step S2, spectrum analysis refers to, for example, chemometrics using a statistical analysis method. Using the spectrum synthesized from the infrared light spectrum data and the near-infrared light spectrum data, an analysis for preparing a calibration curve for predicting the sample concentration from the spectrum by statistical analysis processing is performed.

  The calibration curve is a relational expression for predicting the concentration from the spectrum of unknown sample concentration from the relationship between the sample concentration and the absorbance in a specific wavelength region of the spectrum data. In step S2, a calibration curve is created by a statistical analysis method based on the combined spectrum data obtained in step S1. When a calibration curve is used, the sample concentration can be predicted (analyzed) from the absorbance value in a specific wavelength region in the spectrum obtained from the sample with an unknown concentration.

  Then, the combined spectrum data obtained in steps S1 and S2, the analysis result of the spectrum analysis, and the created calibration curve data are stored in the HDD (step S3), and the analysis process is completed. The combined spectrum data, analysis results, and calibration curve data stored in step S3 may be output to an external device via the communication unit 16.

  Next, an example of a combined spectrum of near infrared light and infrared light will be described with reference to FIG. FIG. 6 shows the spectral distribution of toluene after synthesis.

  In the near-infrared-light and infrared-light spectroscopic analyzer 1, the synthetic spectrum data when analyzed using toluene as a sample is represented by a graph shown in FIG. 6, for example. As shown in FIG. 6, the near-infrared light spectrum and the infrared light spectrum are combined to obtain one spectral distribution data.

  As described above, according to the present embodiment, the near-infrared light and infrared light spectroscopic analysis apparatus 1 alternately performs near-infrared light and infrared light spectrum measurement on the sample, and the measured near-infrared light is measured. Based on the spectral data of light or infrared light, the spectral data of near infrared light and infrared light are synthesized. Then, spectrum analysis and calibration curve creation are performed using the synthesized spectrum data. For this reason, near infrared light and infrared light spectra can be measured together with a single spectroscopic analyzer. Differences in the near infrared light spectrum and infrared light spectrum, changes in the sample, etc., which could not be fully understood in the past. It becomes possible to analyze.

  Also, the PC 70 calculates the average value of the measured near-infrared light or infrared light spectrum data, interpolates it as infrared light or near-infrared light spectrum data at the same time, and measures and interpolates at the same time. The obtained near-infrared light and infrared light spectral data are synthesized. For this reason, when performing a chemical reaction monitor or the like that changes rapidly with time, it is possible to create useful chemical knowledge and a highly accurate calibration curve by obtaining a synthesized spectrum at the same time.

  In the lab, the chemical change of the sample is an important point, and the infrared light spectrum is an important tool for understanding the chemical change, but the process is efficient for manufacturing and managing large quantities of samples. In many cases, near-infrared light having excellent maintainability is used. By using the near-infrared light and infrared light spectroscopic analyzer 1, it is possible to obtain information for shifting to a process in a laboratory development stage, thereby realizing concurrent engineering. Further, the chemical change of the sample can be observed from both near-infrared light and infrared light, and there is an advantage that knowledge about the chemical change is increased.

(Modification)
A modification of the above embodiment will be described with reference to FIG. In FIG. 7, the structure of the spectrum measurement part of the spectroscopic analyzer 2 of the near-infrared light and infrared light of this modification is shown.

  In this modification, a near-infrared light and infrared light spectroscopic analyzer 2 is used instead of the near-infrared light and infrared light spectroscopic analyzer 1 of the above embodiment. In the near-infrared light and infrared light spectroscopic analyzer 2, the same reference numerals are given to portions overlapping with the near-infrared light and infrared light spectroscopic analyzer 1, and different portions will be mainly described.

  The analysis part of the near-infrared light and infrared light spectrum analyzer 2 is the same as the analysis part of the near-infrared light and infrared light spectrum analyzer 1. As shown in FIG. 7, the spectrum measurement part of the near-infrared light and infrared light spectroscopic analyzer 1 includes FTIR 10, optical switch 20, infrared light spectrum measurement unit 30A, and near-infrared light spectrum measurement unit. 40A. The infrared light spectrum measurement unit 30A includes a light pipe 31A, an infrared light optical fiber 31B, an ATR probe 34, an infrared light optical fiber 33A, a light pipe 33B, and an infrared light detector 32A. Configured. The infrared light detector 32 </ b> A is the same as the main body of the infrared light detector 32.

  The optical switch 20 is connected to the ATR probe 34 via the light pipe 31A and the optical fiber 31B. The ATR probe 34 is connected to the infrared light detector 32A via an optical fiber 33A and a light pipe 33B. The light emitted from the optical switch 20 enters the ATR probe 34 through the light pipe 31A and the optical fiber 31B in this order. Further, the outgoing light emitted from the ATR probe 34 enters the infrared light detector 32A through the optical fiber 33A and the light pipe 33B in this order.

  The light pipe has a characteristic of allowing light to pass stably and efficiently, but has a feature that the attenuation of light is relatively large and the length of the light pipe is limited, so that the degree of freedom of the optical path is small. For this reason, the near-infrared light and infrared light spectroscopic analyzer 2 includes the optical fiber 31B in addition to the light pipes 31A and 33B between the optical switch 20, the infrared light detector 32A, and the ATR probe 34. 33A was used.

  Infrared optical fibers have a smaller degree of light attenuation than light pipes and can be made longer, so the degree of freedom of the optical path is greater. In addition, an infrared optical fiber has a problem that deterioration is increased with time. For this reason, it is preferable that the near-infrared light and infrared light spectroscopic analyzer 2 perform spectrum measurement while the deterioration of the optical fibers 31B and 33A is within the allowable range of spectrum measurement.

  As described above, according to this modification, the near-infrared light spectrum measurement unit 40A includes the optical fibers 31B and 33A for infrared light as optical transmission lines. For this reason, the near infrared light spectrum and infrared light spectrum can be measured and analyzed together with a single spectroscopic analyzer, the attenuation of light in the infrared light spectrum measurement unit can be reduced, and the degree of freedom of the optical transmission path can be reduced. Can be bigger. Thus, it is good also as a structure which uses at least one of a light pipe and an optical fiber for an infrared-light spectrum measurement part.

  The descriptions in the above-described embodiments and modifications are examples of the near-infrared light and infrared light spectroscopic analysis apparatus according to the present invention, and the present invention is not limited to this.

  For example, in the above-described embodiment and modification, the FTIR is used as the spectroscopic unit that emits near-infrared light and infrared light. However, the present invention is not limited to this, and other near-infrared light and An infrared light spectroscopic unit may be used. Moreover, in the said embodiment and modification, although it was set as the structure which uses ATR probe 34 as an infrared-light probe for infrared light, it is not limited to this, Other infrared-light probes are used. It is good.

  Moreover, in the said embodiment and modification, although it was set as the structure which uses the near-infrared-light probe 43 and the infrared-light probe 34, it is not limited to this. For example, it is good also as a structure which uses the flow cell from which path length differs in both.

  Moreover, in the said embodiment and modification, although it was set as the structure which performs the spectrum measurement of near infrared light and infrared light with respect to the same sample, it is not limited to this. For example, in a laboratory, it is good also as a structure which performs the spectrum measurement of near-infrared light and infrared light using the near-infrared-light and infrared-spectral-analysis apparatus 1 or 2 with respect to a different sample. In a process, it is good also as a structure which performs the spectrum measurement of near-infrared light and infrared light using the near-infrared-light and infrared-light spectroscopy analyzer 1 or 2 with respect to the different part of the same process.

  Further, in the above-described embodiment and modification, the sample is alternately spectrum-measured by near-infrared light and infrared light, and is configured to interpolate and synthesize the spectrum data of near-infrared light and infrared light. It is not limited to this. For example, a divider is provided in place of the optical switch 20, the light emitted from the FTIR is divided by the divider, the sample is subjected to spectrum measurement simultaneously with the divided near infrared light and infrared light, and the measured near infrared light is measured. In addition, it may be configured to synthesize infrared spectrum data.

  In addition, the detailed configuration and detailed operation of the near-infrared light and infrared light spectroscopic analyzers 1 and 2 in the above-described embodiments and modifications can be appropriately changed without departing from the scope of the present invention.

It is a figure which shows the structure of the spectrum measurement part of the near-infrared-light and infrared-light spectroscopy analyzer of embodiment which concerns on this invention. It is a figure which shows the whole structure of the spectral-analysis apparatus of near-infrared light and infrared light. It is a figure which shows the internal structure of PC. It is a flowchart which shows an analysis process. It is a figure which shows the flow of a spectrum data synthesis | combination. It is a figure which shows the spectrum distribution of toluene after a synthesis | combination. It is a figure which shows the structure of the spectrum measurement part of the spectroscopic analyzer of the near-infrared-light and infrared light of a modification. It is a figure which shows the characteristic of the spectroscope, the detector, the transmission optical path, the window material, and the path length in the spectroscopic analysis of near-infrared light and infrared light. It is a figure which shows the spectrum distribution of toluene by a near-infrared spectroscopic analyzer and an infrared spectroscopic analyzer.

Explanation of symbols

1, 2 Near-infrared light and infrared light spectrum analyzer 10 FTIR
20 Optical switch 30 Infrared light spectrum measurement unit 31, 33, 35, 31A, 33B Light pipe 32, 32A Infrared light detector 34 ATR probe 31B, 33A Optical fiber 40 Near infrared light spectrum measurement unit 41 Light pipe 42 Optical fiber 43 Near-infrared probe 44 Optical fiber 45 Near-infrared light detector 70 PC70
71 CPU
72 Input unit 73 RAM
74 Display 75 HDD
76 Communication unit 77, 78 I / F
79 Bus

Claims (2)

A light source section for emitting near-infrared light and infrared light,
A near-infrared light spectrum measurement unit that irradiates a sample with light emitted from the light source unit to measure a near-infrared light spectrum and outputs near-infrared light spectrum data; and
Irradiating the sample with the light emitted from the light source unit to measure infrared light spectrum and outputting infrared light spectrum data; and
A switching unit that switches the emission destination of the light emitted from the light source unit to the near-infrared light spectrum measurement unit or the infrared light spectrum measurement unit;
A control unit that controls the switching unit to alternately switch the emission destination of the light emitted from the light source unit between the near-infrared light spectrum measurement unit and the infrared light spectrum measurement unit ;
Based on the near-infrared light spectrum data and infrared light spectrum data output from the near-infrared light spectrum measurement unit and the infrared light spectrum measurement unit, an analysis unit that analyzes spectrum data , and
Based on the output near-infrared light spectrum data and infrared light spectrum data, the analysis unit, infrared light spectrum data at the same time as the measurement time of the near-infrared light spectrum data and infrared light spectrum data And the near infrared light spectrum data is calculated and interpolated, and the output near infrared light spectrum data and the interpolated infrared light spectrum data at the same time are synthesized, and the output infrared light spectrum is synthesized. A near-infrared light and infrared light spectroscopic analyzer that synthesizes the data and the interpolated near-infrared light spectrum data at the same time . The near infrared light and infrared light spectroscopic analyzer according to claim 1 , wherein the infrared light spectrum measurement unit includes at least one of a light pipe and an optical fiber as an optical transmission path .

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