CN108106732B - Method and device for calibrating wave number resolution of Raman spectrometer - Google Patents
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- 238000001069 Raman spectroscopy Methods 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000003595 spectral effect Effects 0.000 claims abstract description 54
- 238000001228 spectrum Methods 0.000 claims abstract description 49
- 229910052754 neon Inorganic materials 0.000 claims abstract description 43
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 claims abstract description 43
- 238000001514 detection method Methods 0.000 claims abstract description 28
- 230000003287 optical effect Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 2
- 238000001237 Raman spectrum Methods 0.000 description 1
- 238000001675 atomic spectrum Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention provides a method and a device for calibrating wave number resolution of a Raman spectrometer, wherein the method comprises the following steps: collecting the detection spectrum of the high-purity neon lamp by a to-be-calibrated Raman spectrometer; calculating the wave number resolution of the Raman spectrometer to be calibrated at a preset wavelength based on the detection spectrum, determining a first peak wavelength of a spectral line on the left side of the preset wavelength and closest to the preset wavelength and a second peak wavelength of a spectral line on the right side of the preset wavelength and closest to the preset wavelength on a standard spectrum of the high-purity neon lamp, and calculating the wave number distance between the first peak wavelength and the second peak wavelength; and calibrating the wave number resolution of the Raman spectrometer to be calibrated at the preset wavelength according to the difference between the wave number resolution at the preset wavelength and the wave number distance. The wave number resolution of the Raman spectrometer to be calibrated is calibrated by adopting the standard spectrum generated by the high-purity neon lamp, so that multi-point calibration of the wave number resolution at different preset wavelengths can be realized simultaneously.
Description
Technical Field
The invention relates to the technical field of optical measurement, in particular to a method and a device for calibrating wave number resolution of a Raman spectrometer.
Background
Raman spectroscopy is a vibrational spectrum of molecules that reflects the fingerprint characteristics of the molecule and can be used for the detection of substances. The raman spectrometer detects and identifies a substance by detecting a raman spectrum generated by a raman scattering effect of the substance to be detected on the excitation light.
For Raman spectroscopy, resolution is in cm-1I.e. wavenumber resolution. Spectral curves of the tested sample obtained by measuring with the raman spectrometer with different wave number resolutions are also different, so that parameters of the obtained tested sample are inaccurate. Therefore, the wave number resolution of the raman spectrometer is an important technical index for evaluating the raman spectrometer. Before a Raman spectrometer is used, the wave number of the Raman spectrometer needs to be resolvedAnd calibrating the rate to obtain a correct value of the wave number resolution.
Since the resolution of a common spectrometer is the wavelength resolution, in the prior art, the wavelength resolution of the common spectrometer is usually calibrated by using an atomic spectrum line emitted by a low-pressure mercury lamp, and the full width at half maximum of a spectrum curve obtained by measurement of the common spectrometer is used as an index of the wavelength resolution. However, since the resolution of the raman spectrometer is a wavenumber resolution, the spectral curve is not linearly continuous in wavenumber space. If the full width at half maximum of the spectrum curve measured by the Raman spectrometer is still used as the index of the wave number resolution, the obtained wave number resolution is different from the actual result, and the difference changes with the wave number, so that the calibration result is inaccurate.
Disclosure of Invention
To overcome the above problems or at least partially solve the above problems, the present invention provides a method and an apparatus for calibrating the wave number resolution of a raman spectrometer.
In one aspect, the invention provides a method for calibrating wave number resolution of a raman spectrometer, comprising the following steps:
collecting the detection spectrum of the high-purity neon lamp by a to-be-calibrated Raman spectrometer;
calculating the wave number resolution of the Raman spectrometer to be calibrated at a preset wavelength based on the detection spectrum, determining a first peak wavelength of a spectral line on the left side of the preset wavelength and closest to the preset wavelength and a second peak wavelength of a spectral line on the right side of the preset wavelength and closest to the preset wavelength on a standard spectrum of the high-purity neon lamp, and calculating the wave number distance between the first peak wavelength and the second peak wavelength;
and calibrating the wave number resolution of the Raman spectrometer to be calibrated at the preset wavelength according to the difference between the wave number resolution at the preset wavelength and the wave number distance.
Preferably, the calculating the wavenumber spacing between the first peak wavelength and the second peak wavelength specifically includes:
and respectively taking reciprocal of the first peak wavelength and the second peak wavelength, and subtracting to obtain the wave number spacing.
Preferably, the calculating the wave number resolution of the raman spectrometer to be calibrated at the preset wavelength based on the detection spectrum specifically includes:
the wavenumber resolution is calculated using the following formula:
wherein v is2The wave number resolution, lambda, of the Raman spectrometer to be calibrated at a preset wavelength21The peak wavelength, lambda, of the spectral line on the left side of the preset wavelength and closest to the preset wavelength in the detection spectrum22And the peak wavelength of the spectral line which is on the right side of the preset wavelength and is closest to the preset wavelength in the detection spectrum.
Preferably, the first peak wavelength and the second peak wavelength on the standard spectrum specifically include: 702.405nm and 703.241nm, 723.519nm and 724.517nm, 753.577nm and 754.404nm, 748.887nm and 749.210nm, 867.949nm and 868.192nm, 878.062nm and 878.375 nm.
Preferably, the first peak wavelength and the second peak wavelength on the standard spectrum further include: 440.930nm and 441.322nm, 442.852nm and 442.863nm, 471.007nm and 471.206 nm.
On the other hand, the invention also provides a calibration device for the wave number resolution of the Raman spectrometer, which comprises: a high purity neon lamp;
the high-purity neon lamp is arranged on one side of an optical signal input window of the Raman spectrometer to be calibrated, and light emitted by the high-purity neon lamp is irradiated on the Raman spectrometer to be calibrated.
Preferably, a notch filter is arranged between the to-be-calibrated raman spectrometer and the high-purity neon lamp, and the notch filter is used for preventing a laser signal emitted by a laser source in the to-be-calibrated raman spectrometer from being incident on the high-purity neon lamp.
Preferably, a band-pass filter is further arranged between the to-be-calibrated raman spectrometer and the high-purity neon lamp, and the band-pass filter is used for enabling light with the preset wavelength emitted by the high-purity neon lamp to be incident to the to-be-calibrated raman spectrometer.
Preferably, the center of the optical signal input window of the Raman spectrometer to be calibrated, the center of the notch filter and the high-purity neon lamp are positioned on the same straight line.
The method and the device for calibrating the wave number resolution of the Raman spectrometer provided by the invention calibrate the wave number resolution of the Raman spectrometer to be calibrated by adopting the standard spectrum generated by the high-purity neon lamp, determine the first peak wavelength and the second peak wavelength of the spectral line closest to the preset wavelength on the left side and the right side of the preset wavelength according to the standard spectrum, calculate the wave number distance between the first peak wavelength and the second peak wavelength, calculate the wave number resolution of the Raman spectrometer to be calibrated according to the detection spectral line, calibrate according to the difference value between the wave number resolution and the corresponding wave number distance, and can simultaneously realize multi-point calibration of the wave number resolution at different preset wavelengths.
Drawings
Fig. 1 is a schematic flow chart of a method for calibrating a wave number resolution of a raman spectrometer according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a calibration apparatus for wave number resolution of a raman spectrometer according to another embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
As shown in fig. 1, an embodiment of the present invention provides a method for calibrating a wavenumber resolution of a raman spectrometer, including:
s1, collecting the detection spectrum of the high-purity neon lamp through the Raman spectrometer to be calibrated;
s2, calculating the wave number resolution of the Raman spectrometer to be calibrated at a preset wavelength based on the detection spectrum, determining a first peak wavelength on the left side of the preset wavelength and closest to the preset wavelength and a second peak wavelength on the right side of the preset wavelength and closest to the preset wavelength on a standard spectrum of the high-purity neon lamp, and calculating the wave number distance between the first peak wavelength and the second peak wavelength;
and S3, calibrating the wave number resolution of the Raman spectrometer to be calibrated at the preset wavelength according to the difference between the wave number resolution at the preset wavelength and the wave number distance.
Specifically, since the resolution of a common spectrometer in the prior art is wavelength resolution, but the resolution of a raman spectrometer is wave number resolution, the raman spectrometer cannot be calibrated by using a calibration method for wavelength resolution any more because the wave number is the reciprocal of the wavelength, and a calibration method suitable for wave number resolution must be used.
Therefore, the invention adopts the high-purity neon lamp to calibrate the wave number resolution of the Raman spectrometer to be calibrated. Because a large number of standard spectral lines exist in the standard spectrum of the high-purity neon lamp, the appropriate standard spectral line is selected to calibrate the wave number resolution of the Raman spectrometer to be calibrated.
The specific method is that firstly, a Raman spectrometer to be calibrated is irradiated by a high-purity neon lamp with a known standard spectrum to obtain a detection spectrum of the high-purity neon lamp. Calculating the wave number resolution of the Raman spectrometer to be calibrated at a preset wavelength based on the detection spectrum, determining a first peak wavelength of a spectral line on the left side of the preset wavelength and closest to the preset wavelength and a second peak wavelength of a spectral line on the right side of the preset wavelength and closest to the preset wavelength on the standard spectrum of the high-purity neon lamp, calculating the wave number distance between the first peak wavelength and the second peak wavelength, calculating the difference value between the obtained wave number resolution and the wave number distance, and calibrating the wave number resolution of the Raman spectrometer to be calibrated according to the difference value.
In this embodiment, the wave number resolution of the raman spectrometer to be calibrated is calibrated by using the standard spectrum generated by the high-purity neon lamp, the first peak wavelength and the second peak wavelength of the spectral line closest to the preset wavelength on the left side and the right side of the preset wavelength are determined according to the standard spectrum, the wave number interval between the first peak wavelength and the second peak wavelength is calculated, the wave number resolution of the raman spectrometer to be calibrated is calculated according to the detection spectral line, the calibration is performed according to the difference between the wave number resolution and the corresponding wave number interval, and the multi-point calibration of the wave number resolution at different preset wavelengths can be simultaneously realized.
On the basis of the above embodiment, calculating the wavenumber spacing between the first peak wavelength and the second peak wavelength specifically includes:
and respectively taking reciprocal of the first peak wavelength and the second peak wavelength, and subtracting to obtain the wave number spacing.
Specifically, the calculation of the wavenumber distance between two spectral lines actually is to calculate how many wavenumbers of the difference between the peak wavelengths of the two spectral lines are, and since the wavenumber is the reciprocal of the wavelength, when the wavenumber distance is calculated, the reciprocal can be directly obtained by using the peak wavelengths of the two spectral lines and subtracting the reciprocal, so that the wavenumber distance between the two spectral lines can be obtained.
The specific calculation formula is as follows:
wherein v is1Is the wavenumber spacing between the first peak wavelength and the second peak wavelength, λ11Is the first peak wavelength, λ21Is the second peak wavelength. Since the wavelength is in nm and the wavenumber resolution is in cm-1So that when reciprocal of wavelength is taken, the molecule is 107。
On the basis of the foregoing embodiment, the calculating, based on the detection spectrum, the wave number resolution of the raman spectrometer to be calibrated at the preset wavelength specifically includes:
the wavenumber resolution is calculated using the following formula:
wherein v is2The wave number resolution, lambda, of the Raman spectrometer to be calibrated at a preset wavelength21The peak wavelength, lambda, of the spectral line on the left side of the preset wavelength and closest to the preset wavelength in the detection spectrum22And the peak wavelength of the spectral line which is on the right side of the preset wavelength and is closest to the preset wavelength in the detection spectrum.
On the basis of the above embodiment, for example, (1) if the preset wavelength is 441.126nm, two standard spectral lines with peak wavelengths of 440.930nm and 441.322nm respectively are selected to calculate the wavenumber distance, 440.930nm is the first peak wavelength, 441.322nm is the second peak wavelength, and the wavenumber distance between the first peak wavelength and the second peak wavelength is 20.14cm-1And further 20.14cm-1The wavenumber resolution at 441.126nm was calibrated. It should be noted that, when the preset wavelength is within the range of greater than 440.930nm and less than 441.322nm, the peak wavelengths of the two standard spectral lines may also be selected to calculate the wavenumber distance, and the wavenumber resolution at the preset wavelength is calibrated by using the calculated wavenumber distance. The present invention is not limited to the selection of the predetermined wavelength. (2) If the preset wavelength is 442.858nm, two standard spectral lines with peak wavelengths of 442.852nm and 442.863nm respectively can be selected to calculate the wave number distance, wherein 442.852nm is the first peak wavelength, 442.863nm is the second peak wavelength, and the wave number distance between the first peak wavelength and the second peak wavelength is 0.56cm-1. Meanwhile, when the preset wavelength is within the range of more than 442.852nm and less than 442.863nm, the peak wavelengths of the two standard spectral lines can be selected to calculate the wave number distance, and the wave number resolution at the preset wavelength is calibrated by using the calculated wave number distance. (3) If the preset wavelength is 471.107nm, two standard spectral lines with peak wavelengths of 471.007nm and 471.206nm respectively can be selected to calculate the wave number distance, wherein 471.007nm is the first peak wavelength, 471.206nm is the second peak wavelength, and the wave number distance between the first peak wavelength and the second peak wavelength is 8.97cm-1. Meanwhile, when the preset wavelength is within the range of more than 471.007nm and less than 471.206nm, the peak wavelength calculation waves of the two standard spectral lines can be selectedAnd (5) counting the distance, and calibrating the wave number resolution at the preset wavelength by using the calculated wave number distance.
On the basis of the above embodiment, for example, (4) if the preset wavelength is 702.823nm, two standard spectral lines with peak wavelengths of 702.405nm and 703.241nm respectively can be selected to calculate the wave number spacing, wherein 702.405nm is the first peak wavelength, 703.241nm is the second peak wavelength, and the obtained wave number spacing is 16.92cm-1. Meanwhile, when the preset wavelength is within the range of more than 702.405nm and less than 703.241nm, the peak wavelengths of the two standard spectral lines can be selected to calculate the wave number distance, and the wave number resolution at the preset wavelength is calibrated by using the calculated wave number distance. (5) If the preset wavelength is 724.018nm, two standard spectral lines with peak wavelengths of 723.519nm and 724.517nm respectively can be selected to calculate the wave number distance, wherein 723.519nm is the first peak wavelength, 724.517nm is the second peak wavelength, and the obtained wave number distance is 19.04cm-1. Meanwhile, when the preset wavelength is within the range of more than 723.519nm and less than 724.517nm, the peak wavelengths of the two standard spectral lines can be selected to calculate the wave number distance, and the wave number resolution at the preset wavelength is calibrated by using the calculated wave number distance. (6) If the preset wavelength is 749.049nm, two standard spectral lines with peak wavelengths of 753.577nm and 754.404nm respectively can be selected to calculate the wave number distance, wherein 753.577nm is the first peak wavelength, 754.404nm is the second peak wavelength, and the obtained wave number distance is 14.55cm-1. Meanwhile, when the preset wavelength is within the range of more than 753.577nm and less than 754.404nm, the two standard spectral lines can be selected. (7) If the preset wavelength is 753.991nm, two standard spectral lines with peak wavelengths of 748.887nm and 749.210nm respectively can be selected to calculate the wave number distance, wherein 748.887nm is the first peak wavelength, 749.210nm is the second peak wavelength, and the obtained wave number distance is 5.76cm-1. Meanwhile, when the preset wavelength is within the range of more than 748.887nm and less than 749.210nm, the peak wavelengths of the two standard spectral lines can be selected to calculate the wave number distance, and the wave number resolution at the preset wavelength is calibrated by using the calculated wave number distance. (8) If the preset wavelength is 868.071nm, two standard spectral lines with peak wavelengths of 867.949nm and 868.192nm can be selected respectivelyCalculating wave number distance, wherein 867.949nm is the first peak wavelength, 868.192nm is the second peak wavelength, and the obtained wave number distance is 3.22cm-1. Meanwhile, when the preset wavelength is within the range of more than 867.949nm and less than 868.192nm, the peak wavelengths of the two standard spectral lines can be selected to calculate the wave number distance, and the wave number resolution at the preset wavelength is calibrated by using the calculated wave number distance. (9) If the preset wavelength is 878.219nm, two standard spectral lines with peak wavelengths of 878.062nm and 878.375nm respectively can be selected to calculate the wave number distance, wherein 878.062nm is the first peak wavelength, 878.375nm is the second peak wavelength, and the obtained wave number distance is 4.06cm-1. Meanwhile, when the preset wavelength is within the range of more than 878.062nm and less than 878.375nm, the peak wavelengths of the two standard spectral lines can be selected to calculate the wave number distance, and the wave number resolution at the preset wavelength is calibrated by using the calculated wave number distance.
Therefore, the wave number distance between the standard spectral lines formed by the two standard spectral lines of the selected high-purity neon lamp is different, so that the wave number resolution of the Raman spectrometer to be calibrated can be calibrated by selecting the appropriate standard spectral lines according to the requirement, and the Raman spectrometer with wider laser wavelength range can be calibrated.
In the embodiment, the wave number resolution of the Raman spectrometer to be calibrated is calibrated by adopting the standard spectrum generated by the high-purity neon lamp, the adopted light path is simple, and meanwhile, the multi-point calibration of the wave number resolution at different preset wavelengths can be realized.
Based on the above examples, the purity of the high purity neon lamp used in the present invention needs to be more than 99%.
Another embodiment of the present invention provides a calibration apparatus for wave number resolution of a raman spectrometer, including: a high purity neon lamp;
the high-purity neon lamp is arranged on one side of an optical signal input window of the Raman spectrometer to be calibrated, and light emitted by the high-purity neon lamp is irradiated on the Raman spectrometer to be calibrated.
Specifically, the operation flows and steps correspond to the above method embodiments one to one, and the details of this embodiment are not repeated herein.
On the basis of the embodiment, a notch filter is arranged between the Raman spectrometer to be calibrated and the high-purity neon lamp, and the notch filter is used for preventing a laser signal emitted by a laser source in the Raman spectrometer to be calibrated from being incident on the high-purity neon lamp.
In particular, notch filters, also known as band-stop or band-rejection filters, can transmit light at most wavelengths, but can attenuate light in a particular wavelength range to very low levels. In order to prevent the laser signal emitted by the laser source in the Raman spectrometer to be calibrated from influencing the high-purity neon lamp, a trap filter is arranged between the Raman spectrometer to be calibrated and the high-purity neon lamp so as to prevent the laser signal emitted by the laser source in the Raman spectrometer to be calibrated from being incident on the high-purity neon lamp and reduce errors.
On the basis of the embodiment, in order to make the trap filter fully play a role, the center of an optical signal input window of the Raman spectrometer to be calibrated, the center of the trap filter and the high-purity neon lamp are positioned on the same straight line.
On the basis of the above embodiment, a band-pass filter is further disposed between the to-be-calibrated raman spectrometer and the high-purity neon lamp, and the band-pass filter is configured to allow light with the preset wavelength emitted by the high-purity neon lamp to enter the to-be-calibrated raman spectrometer.
Specifically, when only the wave number resolution of the Raman spectrometer to be calibrated at a certain peak wavelength needs to be calibrated, in order to prevent interference of other spectral lines in the spectrum of the high-purity neon lamp, a standard spectral line which is larger than the peak wavelength can be randomly selected for calibration. Therefore, a band-pass filter is needed to make a section of wavelength light including the standard spectral line pair in the standard spectrum incident to the raman spectrometer to be calibrated so as to calibrate the wave number resolution of the raman spectrometer to be calibrated at a certain peak wavelength.
On the basis of the above embodiment, as shown in fig. 2, the calibration apparatus for the wavenumber resolution of the raman spectrometer of the present invention includes: a detection spectrum acquisition module 21, a spacing and resolution calculation module 22 and a calibration module 23. Wherein the content of the first and second substances,
the detection spectrum acquisition module 21 is used for acquiring the detection spectrum of the high-purity neon lamp through the to-be-calibrated Raman spectrometer;
the distance and resolution calculating module 22 is configured to calculate a wave number resolution of the raman spectrometer to be calibrated at a preset wavelength based on the detection spectrum, determine a first peak wavelength of a spectral line on the left side of the preset wavelength and closest to the preset wavelength and a second peak wavelength of a spectral line on the right side of the preset wavelength and closest to the preset wavelength on a standard spectrum of the high-purity neon lamp, and calculate a wave number distance between the first peak wavelength and the second peak wavelength;
the calibration module 23 is configured to calibrate the wave number resolution of the raman spectrometer to be calibrated at the preset wavelength according to the difference between the wave number resolution at the preset wavelength and the wave number distance.
Specifically, the functions and operation flows of the modules provided in this embodiment correspond to those of the method embodiments one to one, and this embodiment is not described herein again.
In this embodiment, the detection spectrum of the high-purity neon lamp is obtained by the detection spectrum obtaining module, the wave number resolution of the raman spectrometer to be calibrated is calibrated by using the standard spectrum generated by the high-purity neon lamp, the pitch and resolution calculating module determines the first peak wavelength and the second peak wavelength of the spectral line closest to the preset wavelength on the left side and the right side of the preset wavelength according to the standard spectrum, calculates the wave number pitch between the first peak wavelength and the second peak wavelength, and calculates the wave number resolution of the raman spectrometer to be calibrated according to the detection spectral line, and the calibrating module performs calibration according to the difference between the wave number resolution and the corresponding wave number pitch, so that multi-point calibration of the wave number resolution at different preset wavelengths can be realized at the same time.
Finally, the method of the present invention is only a preferred embodiment and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A method for calibrating wave number resolution of a Raman spectrometer is characterized by comprising the following steps:
collecting the detection spectrum of the high-purity neon lamp by a to-be-calibrated Raman spectrometer;
calculating the wave number resolution of the Raman spectrometer to be calibrated at a preset wavelength based on the detection spectrum, determining a first peak wavelength of a spectral line on the left side of the preset wavelength and closest to the preset wavelength and a second peak wavelength of a spectral line on the right side of the preset wavelength and closest to the preset wavelength on a standard spectrum of the high-purity neon lamp, and calculating the wave number distance between the first peak wavelength and the second peak wavelength;
and calibrating the wave number resolution of the Raman spectrometer to be calibrated at the preset wavelength according to the difference between the wave number resolution at the preset wavelength and the wave number distance.
2. The method according to claim 1, wherein the calculating the wavenumber spacing between the first peak wavelength and the second peak wavelength is performed by:
and respectively taking reciprocal of the first peak wavelength and the second peak wavelength, and subtracting to obtain the wave number spacing.
3. The method according to claim 2, wherein the calculating the wavenumber resolution of the raman spectrometer to be calibrated at the preset wavelength based on the detected spectrum specifically comprises:
the wavenumber resolution is calculated using the following formula:
wherein v is2The wave number resolution, lambda, of the Raman spectrometer to be calibrated at a preset wavelength21The peak wavelength, lambda, of the spectral line on the left side of the preset wavelength and closest to the preset wavelength in the detection spectrum22And the peak wavelength of the spectral line which is on the right side of the preset wavelength and is closest to the preset wavelength in the detection spectrum.
4. The method according to any one of claims 1 to 3, wherein the first peak wavelength and the second peak wavelength on the standard spectrum specifically comprise: 702.405nm and 703.241nm, 723.519nm and 724.517nm, 753.577nm and 754.404nm, 748.887nm and 749.210nm, 867.949nm and 868.192nm, 878.062nm and 878.375 nm.
5. The method of claim 4, wherein the first peak wavelength and the second peak wavelength over the standard spectrum further comprise: 440.930nm and 441.322nm, 442.852nm and 442.863nm, 471.007nm and 471.206 nm.
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| CN105181672A (en) * | 2015-09-25 | 2015-12-23 | 东北大学 | Real-time Raman spectrum wavenumber and strength correction method |
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| US7502105B2 (en) * | 2004-09-15 | 2009-03-10 | General Electric Company | Apparatus and method for producing a calibrated Raman spectrum |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6067156A (en) * | 1997-05-16 | 2000-05-23 | Kaiser Optical Systems | Wavelength calibration and tracking methods and apparatus |
| CN102121902A (en) * | 2011-03-15 | 2011-07-13 | 南京工业大学 | Online Raman spectrometer correction device and correction method thereof |
| CN104122245A (en) * | 2013-04-26 | 2014-10-29 | 中国计量科学研究院 | Method for introduction of standard light source into calibration optical path of portable Raman spectrometer |
| CN105181672A (en) * | 2015-09-25 | 2015-12-23 | 东北大学 | Real-time Raman spectrum wavenumber and strength correction method |
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