CN111207831A - Light source switching method of multi-light source monochromator - Google Patents

Light source switching method of multi-light source monochromator Download PDF

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Publication number
CN111207831A
CN111207831A CN202010029349.3A CN202010029349A CN111207831A CN 111207831 A CN111207831 A CN 111207831A CN 202010029349 A CN202010029349 A CN 202010029349A CN 111207831 A CN111207831 A CN 111207831A
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wavelength
light source
energy
light
light sources
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CN202010029349.3A
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CN111207831B (en
Inventor
孙杰
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Anhui Wanyi Science and Technology Co Ltd
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Anhui Wanyi Science and Technology Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/12—Generating the spectrum; Monochromators
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G01J3/10—Arrangements of light sources specially adapted for spectrometry or colorimetry
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G01J3/10—Arrangements of light sources specially adapted for spectrometry or colorimetry
    • G01J2003/102—Plural sources
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/12—Generating the spectrum; Monochromators
    • G01J2003/1295—Plural entry slits, e.g. for different incidences

Abstract

The invention discloses a light source switching method of a multi-light source monochromator, which comprises the following steps: acquiring energy spectrograms of all light sources; in the energy spectrogram, acquiring the wavelength corresponding to the wavelength step when the energy value difference between every two adjacent light sources is minimum under the condition of the same wavelength step; when two adjacent light sources are switched, the two corresponding adjacent light sources are switched under the condition of the corresponding wavelength of the obtained wavelength step; the acquisition of the energy spectrograms of all the light sources and the switching of the light sources have the same light-emitting condition, light-shading condition and light-metering condition. The light source switching method can keep the energy of the monochromatic light output by the multi-light source monochromator when the light source is switched, has strong applicability, and is simple and easy to realize.

Description

Light source switching method of multi-light source monochromator
Technical Field
The invention discloses a monochromator technology, and particularly relates to a light source switching method of a multi-light-source monochromator.
Background
Monochromators are a common core component of optical instruments, and the performance of monochromators largely determines the performance of optical instruments. At present, in a multi-light source monochromator, the switching wavelength of a light source is generally specified manually, which is very easy to cause sudden change of energy of monochromatic light output by the multi-light source monochromator when the light source is switched, and further cause sudden change of errors of measurement data of an optical instrument.
Disclosure of Invention
In order to solve the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a light source switching method for a multi-light source monochromator, which can keep stable energy of monochromatic light output by the multi-light source monochromator when switching light sources, and has the advantages of strong applicability, simplicity and easy implementation.
The technical scheme adopted by the invention for solving the technical problems is as follows: a light source switching method of a multi-light source monochromator comprises the following steps:
acquiring energy spectrograms of all light sources;
in the energy spectrogram, acquiring the wavelength corresponding to the wavelength step when the energy value difference between every two adjacent light sources is minimum under the condition of the same wavelength step;
when two adjacent light sources are switched, the two corresponding adjacent light sources are switched under the condition of the corresponding wavelength of the obtained wavelength step;
the acquisition of the energy spectrograms of all the light sources and the switching of the light sources have the same light-emitting condition, light-shading condition and light-metering condition.
Optionally, the step of obtaining the wavelength corresponding to the wavelength step when the energy value difference between two adjacent light sources is minimum is as follows:
respectively recording two adjacent light sources as M1、M2；
Selecting two adjacent wavelength steps P1、P2Let P stand1、P2The conditions are satisfied: p1＜P2While, at the same time, the light source M1At P1Energy at wavelength step I11Greater than or equal to light source M2At P1Energy at wavelength step I21Light source M2At P2Energy at wavelength step I22Greater than or equal to light source M1At P2Energy at wavelength step I12；
In and only one group P1、P2When the conditions are met, selecting P2The corresponding wavelength is used as a switching light source M1、M2The switching wavelength of (1).
Optionally, in the presence of multiple groups P1、P2When the conditions are met, selecting a group of P closest to the P position1、P2And selecting P closest to P2The corresponding wavelength is used as the light source M1、M2The switching wavelength of (1);
wherein, the determination process of the P position is as follows: in the energy spectrum, a light source M is acquired1Energy maximum of1MCorresponding wavelength step P1MLight source M2Maximum value of energy I2MCorresponding wavelength step P2MThen, then
P＝P1M+I1M(P2M-P1M)/(I1M+I2M)。
Optionally, the lighting condition includes a supply voltage and a supply current of the light source.
Optionally, the light shielding condition includes specifications of an entrance slit and an exit slit of the monochromator.
Optionally, the photometric condition includes a supply voltage of a photomultiplier tube of the monochromator.
By adopting the technical scheme, the method is simple, convenient for practical operation, suitable for all multi-light source monochromators, and capable of keeping stable energy of output monochromatic light during light source switching.
Drawings
FIG. 1 is a graph of the respective energy spectra of two light sources in an embodiment of the present invention;
fig. 2 is an energy spectrum of a dual beam uv-vis spectrophotometer in an embodiment of the present invention.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The invention discloses a light source switching method of a multi-light source monochromator, which comprises the following steps:
s1, acquiring energy spectrograms of all light sources;
s2, acquiring the wavelength corresponding to the wavelength step distance when the difference between the energy values of every two adjacent light sources is minimum under the condition of the same wavelength step distance in the energy spectrogram;
and S3, when two adjacent light sources are switched, the two corresponding adjacent light sources are switched under the corresponding wavelength condition of the acquired wavelength step.
In the above method, the energy spectrums of all the light sources are obtained, and the light sources have the same light emitting condition, light shielding condition, and light measuring condition when switched, where the light emitting condition includes a power supply voltage and a power supply current of the light sources, the light shielding condition includes specifications of an entrance slit and an exit slit of a monochromator, and the light measuring condition includes a power supply voltage of a photomultiplier tube of the monochromator.
The step of obtaining the wavelength corresponding to the wavelength step when the energy value difference between two adjacent light sources is minimum is as follows:
respectively recording two adjacent light sources as M1、M2；
Selecting two adjacent wavelength steps P1、P2Let P stand1、P2The conditions are satisfied: p1＜P2While, at the same time, the light source MaAt P1Energy at wavelength step I11Greater than or equal to light source M2At P1Energy at wavelength step I21Light source M2At P2Energy at wavelength step I22Greater than or equal to light source M1At P2Energy at wavelength step I12；
In and only one group P1、P2When the conditions are met, selecting P2The corresponding wavelength is used as a switching light source M1、M2The switching wavelength of (1).
In having a plurality of groups P1、P2When the conditions are met, selecting a group of P closest to the P position1、P2And selecting P closest to P2The corresponding wavelength is used as the light source M1、M2The switching wavelength of (1);
wherein, the determination process of the P position is as follows: in the energy spectrum, a light source M is acquired1Energy maximum of1MCorresponding wavelength step P1MLight source M2Maximum value of energy I2MCorresponding wavelength step P2MThen, then
P＝P1M+I1M(P2M-P1M)/(I1M+I2M)。
If the P1 and the P2 which meet the conditions cannot be found, at least one of the two light sources M1 and M2 which need to be switched cannot work normally, and the inspection is needed.
The present invention will be further described below by taking a two-beam ultraviolet-visible spectrophotometer as an example.
Examples
As shown in fig. 1, in general, the light sources used in the dual-beam uv-vis spectrophotometer are a tungsten lamp and a deuterium lamp, the deuterium lamp is used in the short wavelength range of 190-350nm, the tungsten lamp is used in the long wavelength range of 250-900nm, and the wavelength range of the light source switching is generally in the range of 250-350 nm.
And (3) acquiring energy spectrograms of the tungsten lamp and the deuterium lamp within the range of 250-350nm by using an energy spectrum scanning function of the ultraviolet-visible spectrophotometer, wherein the X axis of the energy spectrograms is the wavelength step distance, and the Y axis is the energy value. The energy spectrum is shown in figure 1.
As shown in FIG. 1, two adjacent wavelengths P are acquired1And P2And satisfies the following conditions: p1Less than P2Energy spectrum of deuterium lamp, P1Corresponding energy I11Not less than P in energy spectrum of tungsten lamp1Corresponding energy I21Energy spectrum of tungsten lamp, P2Corresponding energy I22Not less than P in energy spectrum of deuterium lamp2Corresponding energy I12. Obtaining: p1＝332.72nm，P2＝333nm。
In the range of 250-350nm, when the wavelength is less than 333nm, a deuterium lamp is used; otherwise, when a tungsten lamp is used, the obtained energy spectrum is shown in fig. 2, and it can be seen from fig. 2 that the energy of the monochromatic light output when the light source is switched remains stable.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Other technical features than those described in the specification are known to those skilled in the art, and are not described herein in detail in order to highlight the innovative features of the present invention.

Claims (6)

1. A light source switching method of a multi-light source monochromator is characterized by comprising the following steps:
acquiring energy spectrograms of all light sources;
in the energy spectrogram, acquiring the wavelength corresponding to the wavelength step when the energy value difference between every two adjacent light sources is minimum under the condition of the same wavelength step;
when two adjacent light sources are switched, the two corresponding adjacent light sources are switched under the condition of the corresponding wavelength of the obtained wavelength step;
the acquisition of the energy spectrograms of all the light sources and the switching of the light sources have the same light-emitting condition, light-shading condition and light-metering condition.
2. The method of claim 1, wherein the step of obtaining the wavelength corresponding to the wavelength step when the energy value difference between two adjacent light sources is minimum comprises:
respectively recording two adjacent light sources as M1、M2；
Selecting two adjacent wavelength steps P1、P2Let P stand1、P2The conditions are satisfied: p1＜P2While, at the same time, the light source M1At P1Energy at wavelength step I11Greater than or equal to light source M2At P1Wavelength of lightEnergy at step size I21Light source M2At P2Energy at wavelength step I22Greater than or equal to light source M1At P2Energy at wavelength step I12；
In and only one group P1、P2When the conditions are met, selecting P2The corresponding wavelength is used as a switching light source M1、M2The switching wavelength of (1).
3. The method of claim 2, wherein there are a plurality of sets P1、P2When the conditions are met, selecting a group of P closest to the P position1、P2And selecting P closest to P2The corresponding wavelength is used as the light source M1、M2The switching wavelength of (1);
wherein, the determination process of the P position is as follows: in the energy spectrum, a light source M is acquired1Energy maximum of1MCorresponding wavelength step P1MLight source M2Maximum value of energy I2MCorresponding wavelength step P2MThen, then
P＝P1M+I1M(P2M-P1M)/(I1M+I2M)。
4. The method of claim 3, wherein the lighting conditions include a supply voltage and a supply current of the light source.
5. The method of claim 3, wherein the light blocking conditions include specifications of an entrance slit and an exit slit of the monochromator.
6. The light source switching method of the multi-light-source monochromator according to claim 3, wherein the photometric condition includes a supply voltage of a photomultiplier tube of the monochromator.
CN202010029349.3A 2020-01-10 2020-01-10 Light source switching method of multi-light source monochromator Active CN111207831B (en)

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05190958A (en) * 1992-01-07 1993-07-30 Nec Corp Wavelength switching equipment and wavelength switching method
US5880833A (en) * 1996-10-31 1999-03-09 Ando Electric Co., Ltd. Spectrometer
CN101883971A (en) * 2007-09-11 2010-11-10 韦里维德有限公司 Colour assessment apparatus and method
TW201300745A (en) * 2011-06-16 2013-01-01 Inventec Solar Energy Corp Method for deriving estimated spectrum of light source to be determined
CN103063295A (en) * 2011-10-24 2013-04-24 阿尔卑斯电气株式会社 Light source recognition device and light source recognition method
CN103278241A (en) * 2013-05-29 2013-09-04 南京斯贝西尔测试技术有限公司 Multiple light source light combination system based on integrating sphere spectral measurement
CN106793326A (en) * 2017-01-05 2017-05-31 叶新怡 The multispectral LED light source of high-color rendering, the exhibition illuminating lamp of museum exhibits and arrange exhibits and means of illumination
CN108336208A (en) * 2018-01-22 2018-07-27 暨南大学 A kind of spectrophotometer LED light source and preparation method thereof
CN110160651A (en) * 2019-04-02 2019-08-23 四川双利合谱科技有限公司 A kind of fluorescent high spectrum testing system
CN209656156U (en) * 2019-05-08 2019-11-19 天津市拓普仪器有限公司 A kind of spectrometer multi-wavelength electrical modulation monochromatic source system

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05190958A (en) * 1992-01-07 1993-07-30 Nec Corp Wavelength switching equipment and wavelength switching method
US5880833A (en) * 1996-10-31 1999-03-09 Ando Electric Co., Ltd. Spectrometer
CN101883971A (en) * 2007-09-11 2010-11-10 韦里维德有限公司 Colour assessment apparatus and method
TW201300745A (en) * 2011-06-16 2013-01-01 Inventec Solar Energy Corp Method for deriving estimated spectrum of light source to be determined
CN103063295A (en) * 2011-10-24 2013-04-24 阿尔卑斯电气株式会社 Light source recognition device and light source recognition method
CN103278241A (en) * 2013-05-29 2013-09-04 南京斯贝西尔测试技术有限公司 Multiple light source light combination system based on integrating sphere spectral measurement
CN106793326A (en) * 2017-01-05 2017-05-31 叶新怡 The multispectral LED light source of high-color rendering, the exhibition illuminating lamp of museum exhibits and arrange exhibits and means of illumination
CN108336208A (en) * 2018-01-22 2018-07-27 暨南大学 A kind of spectrophotometer LED light source and preparation method thereof
CN110160651A (en) * 2019-04-02 2019-08-23 四川双利合谱科技有限公司 A kind of fluorescent high spectrum testing system
CN209656156U (en) * 2019-05-08 2019-11-19 天津市拓普仪器有限公司 A kind of spectrometer multi-wavelength electrical modulation monochromatic source system

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