CN111103246A - Light splitting photometer - Google Patents
Light splitting photometer Download PDFInfo
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- CN111103246A CN111103246A CN201811258572.4A CN201811258572A CN111103246A CN 111103246 A CN111103246 A CN 111103246A CN 201811258572 A CN201811258572 A CN 201811258572A CN 111103246 A CN111103246 A CN 111103246A
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- 238000001514 detection method Methods 0.000 claims abstract description 38
- 238000005259 measurement Methods 0.000 claims abstract description 27
- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 238000005286 illumination Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 9
- 230000003287 optical effect Effects 0.000 claims description 11
- 239000013307 optical fiber Substances 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000001228 spectrum Methods 0.000 claims description 8
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 6
- 229910001416 lithium ion Inorganic materials 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 3
- 230000003595 spectral effect Effects 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000009877 rendering Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
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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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/251—Colorimeters; Construction thereof
-
- G—PHYSICS
- G01—MEASURING; TESTING
- 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
-
- 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
-
- 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
- G01N2201/02—Mechanical
- G01N2201/022—Casings
- G01N2201/0221—Portable; cableless; compact; hand-held
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- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Spectrometry And Color Measurement (AREA)
Abstract
The invention discloses a light splitting photometer, which comprises: the device comprises an LED light-emitting element array, a light-emitting element base, a measuring window, a detection system and a connecting mechanism; the LED light-emitting element array is arranged on the light-emitting element base, and the light-emitting element base is respectively connected with the detection system and the measurement window through the connecting mechanism; the LED light-emitting element array adopts a 45-degree circumferential illumination method and vertical direction receiving as geometrical conditions, the light vertex of the LED light-emitting element array is positioned at the aperture center of the measuring window, and the central axis is positioned on the normal line of the aperture of the measuring window; the LED light-emitting element array comprises three rows of LED light-emitting elements, the first row of LED light-emitting elements and the third row of LED light-emitting elements are white LED light-emitting elements, and the second row of LED light-emitting elements are blue LED light-emitting elements. The light splitting photometer has the effects of more miniaturization and light weight and more stable and balanced light source illumination.
Description
Technical Field
The invention belongs to the technical field of optics, and particularly relates to a portable light splitting photometer.
Background
Color is an important indicator in scientific research and production life. For example, in the test science, accurate color discrimination is an important basis for disease characterization; in the production of coatings, automotive, textile and printing industries, accurate color measurement is an important criterion for product quality. The use of a color measuring instrument instead of human eyes for resolving colors not only can very effectively improve the measurement accuracy, but also provides effective color matching data for a computer. The color measuring instrument mainly comprises two methods, namely a color difference meter and a photometer. The color difference meter directly measures three stimulus value parameters of the object surface by utilizing a photoelectric integration principle; the photometer collects the surface reflection spectral power distribution of an object, quantitatively compares the spectral power of a reference standard with known spectral characteristics on the same wavelength, and thus measures the spectral and photometric characteristics of the sample, and the photometer has high precision and wide practical application. At present, most of portable photometric instrument lighting modules produced at home and abroad adopt halogen tungsten lamp lighting and pulse xenon lamp lighting. Because of the instability of the two illumination modes, a dual-optical-path optical system has to be adopted, which makes the portable spectrophotometer complicated in structure and more expensive.
Therefore, a portable spectrophotometric instrument using an LED light emitting element is needed.
Disclosure of Invention
In order to solve the technical problems of complex and unstable structure of the traditional spectrophotometer in the prior art, the invention provides a portable spectrophotometer adopting an LED light-emitting element.
The technical scheme adopted by the invention for solving the technical problem is as follows:
in one aspect, there is provided a spectrophotometer comprising: the device comprises an LED light-emitting element array, a light-emitting element base, a measuring window, a detection system and a connecting mechanism;
the LED light-emitting element array is arranged on the light-emitting element base, and the light-emitting element base is respectively connected with the detection system and the measurement window through the connecting mechanism;
the LED light-emitting element array adopts a 45-degree circumferential illumination method and vertical direction receiving as geometrical conditions, the light vertex of the LED light-emitting element array is positioned at the aperture center of the measuring window, and the central axis is positioned on the normal line of the aperture of the measuring window;
the LED light-emitting element array comprises three rows of LED light-emitting elements, the first row of LED light-emitting elements and the third row of LED light-emitting elements are white LED light-emitting elements, and the second row of LED light-emitting elements are blue LED light-emitting elements. In some embodiments, each of the first row of LED light emitting elements and the third row of LED light emitting elements includes 10 white LED light emitting elements uniformly arranged in a circumference, a color temperature of the white LED light emitting elements is 6500K, an included angle between optical axes of two adjacent white LED light emitting elements is 36 °, and light emitted by the white LED light emitting elements irradiates the measurement window at 45 °.
In some embodiments, the second row of LED light-emitting elements includes 10 blue LED light-emitting elements uniformly arranged in a circumference, an included angle between optical axes of two adjacent blue LED light-emitting elements is 36 °, and light emitted by the blue LED light-emitting elements irradiates the measurement window at 45 °.
In some embodiments, the light emitting device base includes a first conical thin-walled mechanism, and the LED light emitting device array is uniformly distributed on the first conical thin-walled mechanism.
In some embodiments, the spectrophotometer further comprises an optical fiber, a light source control, a master control, an ADC, a detection system;
the light source control module is used for controlling the opening and closing of the LED light-emitting element array;
the optical fiber is used for transmitting the measurement spectrum of the LED light-emitting element array reflected by the object to be measured to the detection system;
the detection system is used for splitting and detecting the measurement spectrum entering the detection system according to the information of the main control module and sending a measured analog signal to the analog-to-digital conversion module;
the analog-to-digital conversion ADC is used for converting an analog signal measured by the detection system into a digital signal and transmitting the digital signal to the main control module;
the master control is used for receiving the information sent by the analog-to-digital conversion module and the detection system and sending the information to the light source control module, the analog-to-digital conversion module and the detection system.
In some embodiments, the detection system includes a slit, a mirror, a planar grating, and a detector element.
In some embodiments, the light source control module is further configured to stabilize the light source of the LED lighting element when the LED lighting element is closed.
In some embodiments, the spectroscopic photometer further comprises a USB interface for transmitting data of the spectroscopic photometer to an external storage device or a computer; the display screen is used for inputting user instructions and displaying the measurement result of the spectroscopic photometer.
In some embodiments, the spectrophotometer further comprises a lithium ion battery for powering the spectrophotometer.
The invention has the beneficial effects that: according to the portable light-splitting photometer, the LED light-emitting element array, the light-emitting element base, the measuring window, the connecting mechanism of the detection system and the like are arranged, so that the color measuring optical instrument is more miniaturized and lighter, and the light source illumination is more stable and balanced;
on the other hand, the multi-line light-emitting LED is adopted to improve the space uniformity of illumination, and the blue light LED is adopted to compensate the spectrum loss of the white light LED in a short wave band so as to improve the color rendering of the illumination light source.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a spectrophotometer provided in the present invention.
Wherein:
the device comprises a measurement window-1, a light-emitting element base-2, an LED light-emitting array-3, a field lens-4, a connecting mechanism-5, an optical fiber-6, a light source control module-7, a lithium ion battery-8, a main control-9, a display screen-10, a USB interface-11, an ADC-12, a detection system-13 and a shell-14.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
FIG. 1 shows a schematic diagram of the structure of one embodiment of the spectroscopic photometer of the present invention. Each of which is described in detail below.
Referring to fig. 1, the spectroscopic photometer of the present invention includes: the device comprises a measurement window 1, a light-emitting element base 2, an LED light-emitting array 3, a field lens 4, a connecting mechanism 5, an optical fiber 6, a light source control module 7, a lithium ion battery 8, a main control 9, a display screen 10, a USB interface 11, an ADC12, a detection system 13 and a shell 14.
The LED light-emitting element array 3 is arranged on the light-emitting element base 2, and the light-emitting element base 2 is respectively connected with the detection system 13 and the measurement window-1 through the connecting mechanism 5.
The LED light emitting array 3 adopts a 45-degree circumferential illumination method and vertical receiving as geometrical conditions, the light vertex of the LED light emitting array 3 is positioned at the center of the aperture of the measuring window, and the central axis is positioned on the normal line of the aperture of the measuring window. In this embodiment, the LED light emitting array 3 functions to provide a ring-shaped light emitting source to illuminate the measurement window.
In this embodiment, the LED light emitting array 3 includes three rows of LED light emitting elements, where the first row of LED light emitting elements and the third row of LED light emitting elements are both white LED light emitting elements, and the second row of LED light emitting elements are blue LED light emitting elements. The multi-line light-emitting LED is adopted to improve the illumination space uniformity, and the blue light LED is adopted to compensate the spectrum loss of the white light LED in a short wave band so as to improve the color rendering of the illumination light source. The first row of LED light-emitting elements and the third row of LED light-emitting elements are all formed by 10 white light LED light-emitting elements which are uniformly arranged in a circumferential mode, and the included angle of the optical axes of two adjacent LED light-emitting elements is 36 degrees. The color temperature of the white LED light-emitting element is 6500K. The second row of LED light-emitting elements 5 adopts 10 blue light LED light-emitting elements, which are circumferentially and uniformly arranged, and the included angle between the optical axes of two adjacent LED light sources is 36 degrees. Three rows of LED light emitting elements are all held axially aligned in the center of the measurement window. The light emitted by the optical axis of each LED light-emitting element irradiates towards the measuring window at an angle of 45 degrees. In this embodiment, the aperture of the measurement window is Φ 8 mm.
In this embodiment, the light emitting device base 2 functions as a supporting device for the LED light emitting array 3 and dissipates heat from the LED light emitting device. The light emitting element base 2 comprises a first conical thin-wall mechanism, and the LED light emitting elements of the LED light emitting array 3 are uniformly distributed on the first conical thin-wall mechanism.
The connection means 5 comprise a cylindrical thin-walled means between the light emitting element mount 2 and the housing 14. The connecting mechanism 5 has the functions of connecting the detection system 13 at the upper part and connecting the light-emitting element base 2 at the lower part; the second is the supporting function for the field lens 4 and the optical fiber 6.
In this embodiment, the light source control module-7 is configured to control the LED light emitting element array to be turned on and off, and is further configured to stabilize the light source of the LED light emitting array 3 in a turned-on state. The light source control module 7 includes a light source driver, and realizes light source stabilization by accurately controlling the driving current.
And the optical fiber 6 is used for transmitting the measurement spectrum of the LED light emitting array 3 reflected by the measured object to the detection system 13. In this embodiment, the detection system 13 is a spectrometer.
And the detection system 13 is configured to split and detect the measurement spectrum entering the detection system 13 according to the information of the main controller 9, and send a measured analog signal to the analog-to-digital converter ADC 12. The detection system 13 comprises slits, mirrors, a plane grating and detector elements. The surface to be measured is illuminated by the system, and then imaged on the end face of the optical fiber 6 through the field lens 4, the image is transmitted to the slit of the spectrometer through the optical fiber 6, and after collimation of the reflector, plane grating dispersion and imaging of the reflector are carried out in sequence, a spectral image of the surface to be measured is formed on the detector.
An analog-to-digital converter (ADC) 12 for converting the analog signal measured by the detection system 13 into a digital signal and transmitting the digital signal to the main control 9.
The main control unit 9 is configured to receive information sent by the analog-to-digital converter ADC12, the detection system 13, the USB interface 11, and the display screen 10, and further send information to the light source control module 7, the ADC12, the detection system 13, the USB interface 11, and the display screen 10.
The USB interface 11 is used to transmit the data of the spectrometer to an external storage device or a computer. The display screen 10 is used as a transmission interface for inputting user instructions and for displaying the measurement results of the spectroscopic photometer.
The lithium ion battery 8 is used for supplying power to the spectroscopic photometer. In this embodiment, power is provided for the LED light emitting array 3, the light source control module 7, the main control 9, the ADC12, the detection system 13, the USB interface 11, and the display screen 10.
When the measurement is carried out, the lithium ion battery 8 provides electric energy of the spectroscopic photometer, and the light source control module 7 enables the LED light-emitting element array to be closed to emit light so as to provide an illumination light source for a measured object. The spectral distribution reflected by the object to be measured enters the detection system 13 via the optical fiber 6. The detected analog signal is converted into a digital signal by the ADC12 and then transmitted to the main control 9. The master control 9 transmits the measurement structure to the display screen 10 or the USB interface 11, thereby completing the measurement.
The invention has the beneficial effects that: the portable light-splitting photometric instrument provided by the invention has the advantages that the miniaturization and the light weight of the color measuring optical instrument are better realized, and the light source illumination is more stable and balanced by arranging the LED light-emitting element array, the light-emitting element base, the measuring window, the connecting mechanism of the detection system and the like.
The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.
Claims (9)
1. A spectroscopic photometer comprising: the device comprises an LED light-emitting element array, a light-emitting element base, a measuring window, a detection system and a connecting mechanism;
the LED light-emitting element array is arranged on the light-emitting element base, and the light-emitting element base is respectively connected with the detection system and the measurement window through the connecting mechanism;
the LED light-emitting element array adopts a 45-degree circumferential illumination method and vertical direction receiving as geometrical conditions, the light vertex of the LED light-emitting element array is positioned at the aperture center of the measuring window, and the central axis is positioned on the normal line of the aperture of the measuring window;
the LED light-emitting element array comprises three rows of LED light-emitting elements, the first row of LED light-emitting elements and the third row of LED light-emitting elements are white LED light-emitting elements, and the second row of LED light-emitting elements are blue LED light-emitting elements.
2. A spectroscopic photometer as claimed in claim 1, wherein the first and third rows of LED elements each comprise 10 white LED elements arranged uniformly around the circumference, the color temperature of each white LED element is 6500K, the included angle between the optical axes of two adjacent white LED elements is 36 °, and the light emitted from each white LED element irradiates the measurement window at 45 °.
3. A spectroscopic photometer as claimed in claim 1, wherein the second row of LED elements comprises 10 blue LED elements arranged circumferentially and uniformly, an included angle between optical axes of two adjacent blue LED elements is 36 °, and light rays emitted from the blue LED elements are all irradiated towards the measurement window at 45 °.
4. A spectroscopic photometer as defined in claim 1 wherein the light emitting device mount comprises a first conical thin-walled structure, the array of LED light emitting devices being uniformly distributed on the first conical thin-walled structure.
5. A spectroscopic photometer as defined in claim 1, wherein the spectrophotometer further comprises an optical fiber, a light source control, a master control, an analog-to-digital converter (ADC), a detection system;
the light source control is used for controlling the opening and closing of the LED light-emitting element array;
the optical fiber is used for transmitting the measurement spectrum of the LED light-emitting element array reflected by the object to be measured to the detection system;
the detection system is used for splitting and detecting the measurement spectrum entering the detection system according to the information of the main control module and sending a measured analog signal to the analog-to-digital conversion module;
the analog-to-digital conversion ADC is used for converting an analog signal measured by the detection system into a digital signal and transmitting the digital signal to the main control module;
the master control is used for receiving the information sent by the analog-to-digital conversion module and the detection system and sending the information to the light source control module, the analog-to-digital conversion module and the detection system.
6. A spectroscopic photometer of claim 1 wherein the detection system comprises a slit, a mirror, a planar grating and a detector element.
7. A spectroscopic photometer as claimed in claim 5 wherein the light source control module is further adapted to stabilize the light source for the LED light emitting elements when closed.
8. A spectroscopic photometer as defined in claim 1, further comprising a USB interface for transmitting data from the spectrometer to an external storage device or a computer; the display module is used for inputting user instructions and displaying the measurement result of the spectroscopic photometer.
9. A spectroscopic photometer as defined in claim 1 further comprising a lithium ion battery for powering the spectroscopic photometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811258572.4A CN111103246A (en) | 2018-10-26 | 2018-10-26 | Light splitting photometer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811258572.4A CN111103246A (en) | 2018-10-26 | 2018-10-26 | Light splitting photometer |
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| CN111103246A true CN111103246A (en) | 2020-05-05 |
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2018
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| JP2001068900A (en) * | 1999-08-30 | 2001-03-16 | Sony Corp | Mounted part checking method and device, and lighting equipment |
| JP2002237967A (en) * | 2001-02-13 | 2002-08-23 | Tb Optical Co Ltd | Light-emitting diode illumination light source |
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Application publication date: 20200505 |