CN110243476B - 45-degree annular full-spectrum LED lighting device for online non-contact spectral colorimeter - Google Patents
45-degree annular full-spectrum LED lighting device for online non-contact spectral colorimeter Download PDFInfo
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- CN110243476B CN110243476B CN201910650710.1A CN201910650710A CN110243476B CN 110243476 B CN110243476 B CN 110243476B CN 201910650710 A CN201910650710 A CN 201910650710A CN 110243476 B CN110243476 B CN 110243476B
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- 238000005259 measurement Methods 0.000 abstract description 28
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
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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
- G01J3/02—Details
- G01J3/10—Arrangements of light sources specially adapted for spectrometry or colorimetry
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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
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/255—Details, e.g. use of specially adapted sources, lighting or optical systems
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Abstract
The invention discloses a 45-degree annular full-spectrum LED lighting device for an online non-contact light-splitting color measuring instrument, which solves the problems of complex light path design and low measurement of the lighting device in the prior art. The invention comprises a full-sealed shell, wherein a first reflecting plate, a lens component and a second reflecting plate are sequentially arranged in the full-sealed shell from top to bottom, the lower part of the full-sealed shell is provided with a light-passing hole, the second reflecting plate is movably covered on the light-passing hole, the second reflecting plate corresponds to a third radiating plate arranged on a platform, and the first reflecting plate, the lens component and the second reflecting plate are positioned on the same central axis; the inner wall of the full-sealed shell is provided with an annular LED lamp, and the LED lamp corresponds to the first reflecting plate and the second reflecting plate respectively. According to the invention, the quasi-symmetrical double-light-path measuring system is adopted to carry out internal spectrum calibration, external spectrum calibration and measurement, so that the use cost and the influence of special environmental factors on a production line on a color measuring result can be effectively reduced, and the measuring precision is improved.
Description
Technical Field
The invention relates to the technical field of lighting devices in color measuring instruments, in particular to a 45-degree annular full-spectrum LED lighting device for an online non-contact spectral color measuring instrument.
Background
As the color selection of the products becomes one of important references, along with the high-speed development of science and technology, the color difference of industrial products has higher and higher requirements on the colors, the color difference of the products directly affects the quality index of the products, the color difference of the products is too high, even a lot of waste products or defective products are generated, great waste is caused, serious economic loss is brought to enterprises, in order to replace the resolution capability of human eyes on the colors of the online products, the online spectral analysis is applied to a plurality of links of the enterprise production in a plurality of fields at a remarkable speed, and the field of process analysis instruments has been deeply transformed. The unique advantages of this innovation and online spectroscopic analysis are indistinguishable, for example, online spectroscopic analysis can be measured continuously and at a high speed; the on-line spectrum analysis mostly adopts an annular light source illumination technology and an optical fiber transmission technology, and is suitable for occasions with severe environments; the on-line spectrum analyzer has the advantages of relatively simple structure, suitability for various samples (such as liquid, coating, powder, solid and the like), and great value for quick quality control, optimized operation, stable production, energy conservation and consumption reduction of enterprise raw materials and intermediate links of production. The spectrocolorimeter is the most basic one in the spectrum analysis instrument, and the tristimulus values of the objects are calculated by measuring the reflectivity or the transmissivity of the objects, so that the required various color data are calculated, and the color data of the various objects are convenient to obtain.
Among the four standard illumination and observation conditions specified by the international commission on illumination (CIE) for measuring reflectance chromaticity, the conditions for integrating sphere illumination will not be applicable here. The spectrocolorimeter is divided into two types, one is a laboratory spectrocolorimeter, and has the advantages of high measurement accuracy, and an object is required to be closely attached to a measurement window for measurement due to the adoption of a D/8-degree illumination observation condition; the other is an on-line spectrocolorimeter, and the greatest advantage of the on-line spectrocolorimeter is that the spectral information of the object can be obtained without contacting the surface of the product. The 0/45 degree or 45/0 degree illumination and observation conditions are more suitable for on-line color measurement. When measuring color at 45/0 degree, the ring light source is usually selected to irradiate the measured object at 45 degrees, and the measuring method can fully and uniformly illuminate the surface trace or texture of the measured object to the greatest extent, can reduce the measuring error to the greatest extent, and has high measuring value repeatability.
On an on-line production machine, the measuring environment is complex, the measured object moves at a high speed, the up-down shaking error can occur by strictly controlling the instrument in a mechanical mode or the measured object is inevitably controlled, the reflected light intensity of the measured object and the color measuring instrument can directly influence the change of the measured value due to the change of the distance factor, and a more uniform illumination scheme is needed to eliminate the error generated by the distance to the greatest extent, so that the measuring precision is ensured.
In the patent with the application number of 201310675904.X and the patent name of 45-degree annular lighting device for the online spectrocolorimeter, the online spectrocolorimeter adopts a pulse xenon lamp as a lighting source, and has the advantages that the spectrum of the pulse xenon lamp is most similar to natural light and the flash intensity is high. The flash speed is high. However, the pulse xenon lamp has the disadvantage that it is difficult to produce a pure annular light source, and an optical refraction method is required to simulate the pure annular light source, so that the measured object is insufficiently annular illuminated, and measurement errors are increased due to the influence of surface textures or unevenness of the measured object, such as measurement during shake or parallel movement of the measured object. And the control circuit is complex, and the lamp and the control circuit have short service lives. Pulsed xenon lamps exist due to lifetime considerations. If the pulse xenon flash lamp is applied to online color measurement, the measurement times or the measurement frequency of the instrument are strictly limited, and the pulse xenon flash lamp is characterized by a high-voltage discharge principle and needs a high-voltage energy storage release control circuit. If the pulse xenon lamp is lighted at high frequency, the service lives of the pulse xenon lamp control circuit and the pulse xenon lamp are rapidly reduced, so that the pulse xenon lamp control circuit and the pulse xenon lamp are natural loss products, and the use cost or the high maintenance cost of the instrument are increased. Another problem is that the characteristic of the pulse xenon lamp makes the light intensity of each lighting not strictly controlled, which almost depends on double-light path spectrum operation to obtain relatively correct correction data, and if the on-line measurement is applied to a machine in a complex environment, the error caused by the shake or motion of the measured object is exactly combined with the error of the pulse xenon lamp, which inevitably causes a larger measurement error.
Disclosure of Invention
Aiming at the defects in the background technology, the invention provides a 45-degree annular full-spectrum LED lighting device for an online non-contact spectrocolorimeter, which solves the problems of complex light path design and low measurement of the lighting device in the prior art.
The technical scheme of the invention is realized as follows: the 45-degree annular full-spectrum LED lighting device for the online non-contact light-splitting color meter comprises a full-sealed shell, wherein a first reflecting plate, a lens assembly and a second reflecting plate are sequentially arranged in the full-sealed shell from top to bottom, a light passing hole is formed in the lower part of the full-sealed shell, the second reflecting plate is movably covered on the light passing hole, the second reflecting plate corresponds to a third reflecting plate arranged on a platform, and the first reflecting plate, the lens assembly and the second reflecting plate are positioned on the same central axis; the inner wall of the full-sealed shell is provided with an annular LED lamp, and the LED lamp corresponds to the first reflecting plate and the second reflecting plate respectively.
The lens assembly comprises a lens barrel, the lens barrel is connected with the fully-sealed shell through a lens connecting plate, a double-sided reflecting mirror which is obliquely arranged at an angle of 45 degrees with a horizontal plane is arranged at the center part of the lens barrel, a first diaphragm and a first lens are arranged at the upper part of the lens barrel, and the first lens is positioned at the lower part of the first diaphragm; the lower part of the lens barrel is provided with a second diaphragm and a second lens, and the second lens is positioned at the lower part of the second diaphragm; the left side of the lens barrel is provided with a monitoring branch optical fiber, the left side of the lens barrel is provided with a sample branch optical fiber, an optical path channel is arranged among the monitoring branch optical fiber, the first lens and the double-sided reflecting mirror, and an optical path channel is arranged among the sample branch optical fiber, the second lens and the double-sided reflecting mirror; ground glass is arranged below the lens barrel.
The surface of the double-sided reflecting mirror is plated with a reflecting film; black coatings are arranged on the inner wall of the lens barrel, the inner wall of the full-sealed shell and the lens connecting plate.
An annular radiator is arranged on the inner wall of the fully-sealed shell, an LED substrate is arranged on the annular radiator, and an LED lamp is arranged on the LED substrate.
The LED lamp light source is arranged at 45+/-5 degrees with the normal line of the first reflecting plate, and the LED lamp light source is arranged at 38+/-5 degrees with the normal line of the second reflecting plate; and black coatings are arranged on the annular radiator and the LED substrate.
The light transmission hole is covered with a connecting plate, the second reflecting plate is arranged on the connecting plate, and the connecting plate is connected with a displacement motor arranged inside the full-sealed shell through a transmission mechanism.
The transmission mechanism comprises a worm wheel and a worm, the worm wheel is arranged on an output shaft of the displacement motor, the worm is arranged on the connecting plate, and the worm wheel is matched with the worm.
The transmission mechanism comprises a large fluted disc and a pinion, the pinion is arranged on an output shaft of the displacement motor, the large fluted disc is arranged on the connecting plate, and the large fluted disc is meshed with the pinion.
The upper part of the fully-sealed shell is provided with an optical fiber leading-out hole.
The invention adopts the quasi-symmetrical double-light-path measuring system to carry out internal spectrum calibration, external spectrum calibration and measurement, can effectively reduce the use cost and the influence of special environmental factors on a production line on color measuring results, such as the influence of product shake, high-speed movement of products, or high dust, high temperature and high humidity severe environment on color data. The invention has ingenious design, symmetrical light path design, simplified measurement structure, fixed distance between the measured object and the measured object during measurement, non-contact measurement, 45-degree annular illumination for illuminating the measured object at 45 degrees on the whole circumference, and the illumination mode obviously reduces the non-uniformity of the surface of the measured object on the measurement result so as to compensate the distance error caused by the tiny shake of the measured object, and monitors the spectrum of the LED light source while measuring the measured object, so that the tiny spectrum change of the LED flash is removed, the measurement error is minimized, and the illumination device is in modularized design and is convenient for the connection of a traditional spectrometer.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings that are required for the description of the embodiments will be briefly described below, it being apparent that the drawings in the following description are only some embodiments of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic diagram of the overall structure of the present invention.
Fig. 2 is a schematic view of the optical principle of the present invention.
Fig. 3 is a schematic view of the overall structure of the present invention in embodiment 3.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without any inventive effort, are intended to be within the scope of the invention.
Embodiment 1, as shown in fig. 1 and 2, a 45-degree annular full spectrum LED lighting device for an online non-contact spectrocolorimeter comprises a full-sealed housing 1, wherein a first reflecting plate 6, a lens assembly 23 and a second reflecting plate 13 are sequentially arranged inside the full-sealed housing 1 from top to bottom, a light through hole 20 is formed in the lower portion of the full-sealed housing 1, the second reflecting plate 13 is movably covered on the light through hole 20, the second reflecting plate 13 is arranged in parallel with a third reflecting plate 12 arranged on a platform 22, and when the device is used, a sample is placed on the third reflecting plate, and the second reflecting plate 13 is moved away from the light through hole 20. The first reflecting plate 6, the lens component 23 and the second reflecting plate 13 are located on the same central axis, when the first reflecting plate 6 and the second reflecting plate 13 are located at the upper position and the lower position of the lens component 23, the second reflecting plate 13 covers the light passing hole, a sealed full-sealed shell is formed at the moment, the first reflecting plate 6, the second reflecting plate 13 and the lens component 23 form an automatic calibration structure, namely the light passing hole 20 is closed, when a light source flashes, two calibration reflecting plate light beams are collected at the same time, and double-light-path spectrum calibration is completed after double-light-path spectrum operation. The inner wall of the fully-sealed shell 1 is provided with an annular LED lamp 4, and the LED lamp 4 corresponds to the first reflecting plate 6 and the second reflecting plate 13 respectively; the full spectrum LED lamp of visible light that uses in this device, this LED lamp does not contain the ultraviolet spectrum, consequently does not need extra ultraviolet filter, makes optical structure further simplify. 128 full-spectrum LED lamp beads are uniformly arranged on the inner wall of the annular full-sealed shell, and uniformly irradiate on the surface of a measured object in a 45-degree annular manner, so that the measured object fully realizes diffuse reflection, and the measured object can still meet the test requirement even if the measured object shakes +/-3 mm through practical tests, and the device meets the CIE stipulated 45/0-degree geometric illumination observation condition. The upper part of the fully-sealed shell 1 is provided with an optical fiber leading-out hole 21 for leading out the optical fiber. The LED lighting device is divided into three working states, namely internal spectrum calibration, external spectrum calibration and measurement, and high-precision measurement of a sample is realized through the three states. The quasi-symmetrical double-light-path measuring system is composed of a first reflecting plate, a second reflecting plate (or a third reflecting plate) and a lens component, and the quasi-symmetrical double-light-path measuring system is a double-light-path system which is composed of a light source monitoring branch and a measuring branch by using basically identical optical structures and identical optical elements. When the optical color measurement system adopts the design of the quasi-symmetrical double-light-path, the light source is flash, the light source monitoring branch and the measuring branch finish acquisition by the same optical structure, and great advantages are brought to the subsequent spectrum data processing, such as the light source spectrum is inevitably changed after the system runs for a long time or is affected by temperature.
Further, the lens assembly 23 includes a lens barrel 16, the lens barrel 16 is connected with the hermetically sealed housing 1 through a lens connection plate 19, a double-sided mirror 9 disposed at an angle of 45 ° with respect to a horizontal plane is disposed at a center portion of the lens barrel 16, and a reflective film is coated on a surface of the double-sided mirror 9, so that double-sided reflection can be performed. The upper part of the lens barrel 16 is provided with a first diaphragm 8 and a first lens 7, and the first lens 7 is positioned at the lower part of the first diaphragm 8; the lower part of the lens barrel 16 is provided with a second diaphragm 18 and a second lens 17, and the second lens 17 is positioned at the lower part of the second diaphragm 18; the left side of the lens barrel 16 is provided with a monitoring branch optical fiber 10, the left side of the lens barrel 16 is provided with a sample branch optical fiber 11, and an optical path channel, namely a monitoring optical path channel, is arranged among the monitoring branch optical fiber 10, the first lens 7 and the double-sided reflecting mirror 9. An optical path channel, namely a sample measuring optical path channel, is arranged among the sample branch optical fiber 11, the second lens 17 and the double-sided reflecting mirror 9. The monitoring branch optical fiber and the sample branch optical fiber are fixed by adopting connectors, and ground glass 2 is arranged below the lens barrel 16; black coating is provided on the inner wall of the lens barrel 16, the inner wall of the hermetically sealed case 1 and the lens connecting plate 19.
When in use, three working states of internal spectrum calibration, external spectrum calibration and measurement can be carried out. When the internal spectrum is calibrated, the second reflecting plate covers the light passing hole, the angle emitted by the full-spectrum LED annular light source is 120 degrees and is close to the visible spectrum of natural light, the emergent light is divided into two paths, wherein the emergent light of the first path and the normal line of the first reflecting plate 6 are reflected at 45 degrees, the size of the incident light is limited by the first diaphragm 8, the incident light enters the first lens 7 for focusing, finally, the incident light is reflected by the double-sided reflecting mirror 9 and is collected by the optical fiber of the light source monitoring branch, meanwhile, the emergent light of the second path is reflected at an angle of 45 degrees approximately to the normal line of the second reflecting plate 13 after being distributed and transmitted by the diffuse radiation of the ground glass 2, enters the second lens 17 for focusing by the second diaphragm 18, and finally, the emergent light is collected by the optical fiber of the sample monitoring branch after being reflected by the double-sided reflecting mirror 9, so that the double-way spectrum information is obtained synchronously, and the internal spectrum calibration of the measuring branch and the light source monitoring branch is completed through spectrum operation. During external calibration, the third reflecting plate 12 is placed and fixed at the parallel distance according to the distance interval of +/-5 mm set by a measured object, the second reflecting plate is moved away from the light through hole, the light through hole 20 is opened, then the total-spectrum LED annular light source emits light with an angle of 120 degrees which is close to the visible spectrum of natural light, the emergent light is divided into two paths, the size of the incident light is limited by the first diaphragm 8 after being reflected by the normal line of the first reflecting plate 6 at 45 degrees, the incident light enters the first lens 7 for focusing, finally the light is reflected by the double-sided reflecting mirror 9, the light is collected by the light source monitoring branch optical fiber, meanwhile, the emergent light of the second path is reflected by the ground glass 2 at an angle of 45 degrees approximately to the normal line of the third reflecting plate 12 for diffuse radiation distribution transmission, enters the second diaphragm 18 for focusing, finally the light is reflected by the double-sided reflecting mirror 9, the emergent light is collected by the sample monitoring branch optical fiber after the spectrum is collected by the spectrum of the third reflecting plate 12, the second reflecting plate 13 and the first reflecting plate 6, and the calibration of the spectrum calibration algorithm of the measured distance is completed. When measuring for a long time, the measured spectrum will inevitably change due to the influence of the spectrometer and various factors and the change of the ambient humidity and temperature, the corresponding relation between the spectrum of the sample branch and the light source monitoring branch will need to be rescaled, at this time, the automatic internal spectrum calibration interval can be set according to the target environment, and the real-time double-light-path spectrum calibration is completed after the spectrum operation.
In embodiment 2, an annular radiator 5 is disposed on the inner wall of the fully-sealed housing 1, the annular radiator 5 is formed by processing an aluminum block, an LED substrate 3 is disposed on the annular radiator 5, an LED lamp 4 is disposed on the LED substrate 3, and the LED lamp 4 is a korean holly (SEOUL) Sunlike full spectrum natural light lamp bead. 128 full-spectrum LED lamp beads are uniformly arranged on the LED substrate 3 and uniformly irradiate on the surface of a measured object in a 45-degree annular manner, so that the diffuse reflection of the measured object is fully realized. The LED lamp 4 light source forms 45+/-5 degrees with the normal line of the first reflecting plate 6, the LED lamp 4 light source forms 38+/-5 degrees with the normal line of the second reflecting plate 13, the light source can be conveniently reflected better on the first reflecting plate and the second reflecting plate, the LED lamp 4 can illuminate the measured object at 45 degrees on the whole circumference, the non-uniformity of the surface of the measured object is obviously reduced by the illumination mode, the annular radiator 5 and the LED substrate 3 are both provided with black coatings, and the loss in the light transmission process is reduced.
Further, the light passing hole 20 is covered with a connecting plate 15, the second reflecting plate 13 is mounted on the connecting plate 15, the connecting plate 15 is connected with a displacement motor 14 arranged inside the fully-sealed shell 1 through a transmission mechanism, and the second reflecting plate is movably covered on the light passing hole. The transmission mechanism comprises a worm wheel 24 and a worm 25, the worm wheel 24 is arranged on the output shaft of the displacement motor 14, the worm 25 is arranged on the connecting plate 15, and the worm wheel 24 is matched with the worm 25. The displacement motor 14 is connected with the background controller, and the displacement motor rotates to drive the worm wheel to rotate, and the worm wheel drives the worm to move left and right, so that the connecting plate drives the second reflecting plate to move left and right, and the opening and closing of the light through hole are realized. The opening and closing of the light through holes has the following two functions: firstly, reduce the pollution of external environment to the optical system when closing the light through hole 20, secondly, the second reflecting plate is in the calibration position when closing the light through hole, can scale at any time. The specific implementation method is that the second reflecting plate is arranged above the connecting plate, the displacement motor can be driven to drive the connecting plate to displace to the second reflecting plate and the light passing hole 20 on a central axis during automatic calibration, the light passing hole 20 is closed, two calibrated reflecting plate light beams are collected simultaneously during light source flashing, and after double-light-path spectrum operation, double-light-path spectrum calibration is completed, so that measurement accuracy is improved.
Other structures are the same as in embodiment 1.
Embodiment 3, as shown in fig. 3, a 45-degree annular full spectrum LED lighting device for an online non-contact spectrocolorimeter, the transmission mechanism comprises a large fluted disc 24a and a small gear 25a, the small gear 25a is arranged on an output shaft of a displacement motor 14, the large fluted disc 24a is fixed on a connecting plate 15, the lower part of the large fluted disc 24a is rotationally connected with a full-sealed shell through a rotating shaft, so that the connecting plate can swing conveniently, and the large fluted disc 24a and the small gear 25a are meshed. Namely, the displacement motor drives the large fluted disc to rotate through the pinion, and the connecting plate swings back and forth on the large fluted disc to realize the opening and closing of the light passing hole; for an online color measuring instrument, a 45-degree annular full-spectrum LED lighting device for an online non-contact spectrocolorimeter is installed. The flexibility of the measurement period is obviously improved, if the color measuring instrument is applied to a good environment, after the light-passing hole is opened during measurement, the full-spectrum LED annular light source can be repeatedly lightened by using the frequency of more than 0.5 seconds, the temperature of the device is not influenced, and the light-passing hole is closed after the measurement is completed.
Other structures are the same as those of embodiment 2.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (6)
1. The utility model provides an online non-contact beam split color appearance is with 45 degrees annular full spectrum LED lighting device which characterized in that: the lens assembly comprises a full-sealed shell (1), wherein a first reflecting plate (6), a lens assembly (23) and a second reflecting plate (13) are sequentially arranged inside the full-sealed shell (1) from top to bottom, a light passing hole (20) is formed in the lower part of the full-sealed shell (1), the second reflecting plate (13) is movably covered on the light passing hole (20), the second reflecting plate (13) corresponds to a third reflecting plate (12) arranged on a platform (22), and the first reflecting plate (6), the lens assembly (23) and the second reflecting plate (13) are located on the same central axis; the inner wall of the fully-sealed shell (1) is provided with an annular LED lamp (4), and the LED lamp (4) corresponds to the first reflecting plate (6) and the second reflecting plate (13) respectively; when the first reflecting plate (6) and the second reflecting plate (13) are respectively positioned at the upper and lower positions of the lens assembly (23), the second reflecting plate (13) covers the light passing hole, a sealed full-sealed shell is formed at the moment, and the first reflecting plate (6) and the second reflecting plate (13) and the lens assembly (23) form an automatic calibration structure;
the lens assembly (23) comprises a lens barrel (16), the lens barrel (16) is connected with the fully-sealed shell (1) through a lens connecting plate (19), a double-sided reflecting mirror (9) which is obliquely arranged at an angle of 45 degrees with a horizontal plane is arranged at the center part of the lens barrel (16), a first diaphragm (8) and a first lens (7) are arranged at the upper part of the lens barrel (16), and the first lens (7) is positioned at the lower part of the first diaphragm (8); the lower part of the lens barrel (16) is provided with a second diaphragm (18) and a second lens (17), and the second lens (17) is positioned at the lower part of the second diaphragm (18); the left side of the lens barrel (16) is provided with a monitoring branch optical fiber (10), the left side of the lens barrel (16) is provided with a sample branch optical fiber (11), an optical path channel is arranged among the monitoring branch optical fiber (10), the first lens (7) and the double-sided reflecting mirror (9), and an optical path channel is arranged among the sample branch optical fiber (11), the second lens (17) and the double-sided reflecting mirror (9); a ground glass (2) is arranged below the lens barrel (16);
an annular radiator (5) is arranged on the inner wall of the fully-sealed shell (1), an LED substrate (3) is arranged on the annular radiator (5), and an LED lamp (4) is arranged on the LED substrate (3);
the LED lamp (4) light source is arranged at an angle of 45+/-5 degrees to the normal line of the first reflecting plate (6), and the LED lamp (4) light source is arranged at an angle of 38+/-5 degrees to the normal line of the second reflecting plate (13); and black coatings are arranged on the annular radiator (5) and the LED substrate (3).
2. The 45-degree annular full-spectrum LED lighting device for an online non-contact spectrocolorimeter according to claim 1, wherein: the surface of the double-sided reflecting mirror (9) is plated with a reflecting film; black coatings are arranged on the inner wall of the lens barrel (16), the inner wall of the fully-sealed shell (1) and the lens connecting plate (19).
3. The 45-degree annular full spectrum LED lighting device for an online non-contact spectrocolorimeter according to claim 1 or 2, wherein: the light transmission hole (20) is covered with a connecting plate (15), the second reflecting plate (13) is arranged on the connecting plate (15), and the connecting plate (15) is connected with a displacement motor (14) arranged inside the full-sealed shell (1) through a transmission mechanism.
4. The 45-degree annular full-spectrum LED lighting device for an online non-contact spectrocolorimeter according to claim 3, wherein: the transmission mechanism comprises a worm wheel (24) and a worm (25), the worm wheel (24) is arranged on an output shaft of the displacement motor (14), the worm (25) is arranged on the connecting plate (15), and the worm wheel (24) is matched with the worm (25).
5. The 45-degree annular full-spectrum LED lighting device for an online non-contact spectrocolorimeter according to claim 3, wherein: the transmission mechanism comprises a large fluted disc (24 a) and a small gear (25 a), the small gear (25 a) is arranged on an output shaft of the displacement motor (14), the large fluted disc (24 a) is arranged on the connecting plate (15), and the large fluted disc (24 a) is meshed with the small gear (25 a).
6. The 45-degree annular full spectrum LED lighting device for an on-line non-contact spectrocolorimeter according to claim 1, 4 or 5, wherein: the upper part of the fully-sealed shell (1) is provided with an optical fiber leading-out hole (21).
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