Parallel light source and high-precision optical measuring instrument using same

Abstract

The utility model discloses a parallel light source and a high-precision optical measuring instrument using the same. The parallel light source comprises a light source fixing support, a heat dissipation cover, a first lamp bead, a collimator, a first light limiting plate and a second light limiting plate, the first lamp bead generates light, the light is collimated through the collimator, stray light is removed through the first light limiting plate, the size of light spots is adjusted through the second light limiting plate, and heat dissipation is conducted through the heat dissipation cover. The optical measuring instrument comprises a base supporting unit, an optical measuring unit and an operation control unit. According to the measuring instrument, through the design of double light sources and double light paths, measurement of transmission light and reflection light can be completed at the same time, various optical properties such as reflection spectrum, transmission spectrum, visible light reflectivity, photovoltaic reflectivity, visible light transmittance, photovoltaic transmittance, color parameters and film layer thickness can be calculated and output, and the high-precision detection requirements of products such as photovoltaic glass are met.

Description

Technical Field

[0001] This utility model relates to the field of optical measurement technology, specifically to a parallel light source and a high-precision optical measuring instrument using the parallel light source. Background Technology

[0002] In recent years, with the rapid development of the solar photovoltaic cell industry, companies have placed higher demands on raw materials and processing technologies to improve the conversion efficiency and power of photovoltaic modules. Photovoltaic glass covers, as a crucial raw material, play a significant role in enhancing the power of solar modules. Depositing anti-reflective coatings on the surface of photovoltaic glass to effectively improve its transmittance has become a routine operation for photovoltaic glass manufacturers. However, how to better control the quality parameters of glass coating products, such as transmittance, color, and film thickness, is a key focus for glass coating companies.

[0003] Currently, photovoltaic glass coating manufacturers need to equip themselves with multiple testing devices to measure all optical performance parameters of their coated products. One device is used to test transmittance, another to test reflectance and color, and a third to test film thickness. This not only increases the procurement cost of testing equipment, but also increases the testing process and the workload of quality inspectors, resulting in relatively low testing efficiency.

[0004] A more serious problem is the poor accuracy of currently used optical instrument combinations. For example, instruments for measuring transmittance use a single-path mode, resulting in insufficient measurement accuracy, large errors, and mismatches between the measurement results and the photovoltaic module power measurement results. Instruments for measuring film thickness, due to their fixed optical system structure, can only measure film thicknesses of glass thicker than 3.0 mm, while the mainstream photovoltaic glass thickness is currently 2 mm. Existing instruments for measuring film thickness are completely ineffective when measuring the film thickness of 2.0 mm thick glass. Therefore, there is an urgent need for an optical instrument with high measurement accuracy and comprehensive measurement functions. Utility Model Content

[0005] The purpose of this invention is to solve the above problems by providing a parallel light source and a high-precision optical measuring instrument using the parallel light source.

[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0007] A parallel light source is provided, including a light source fixing bracket, on which a heat sink is fixed;

[0008] LED bead one, which is disposed inside the heat sink, is used to generate light;

[0009] A collimator is disposed at one end of the heat sink, and the position of the collimator corresponds to the position of the first lamp bead.

[0010] A first light limiting plate is arranged in the heat dissipation cover and between the collimator and the first lamp bead.

[0011] A second light limiting plate is arranged on the front side of the collimator.

[0012] As a further description of the above technical solution, the collimator comprises a collimating cylinder, and the collimating cylinder is internally provided with a convex lens and a flat lens.

[0013] As a further description of the above technical solution, the first light limiting plate and the second light limiting plate are both provided with an opening.

[0014] As a further description of the above technical solution, the inner diameter of the opening on the surface of the first light limiting plate is 1-10 mm, and the inner diameter of the opening on the surface of the second light limiting plate is 5-30 mm.

[0015] A high-precision optical measuring instrument using the parallel light source is also provided, which comprises a base support unit, and the base support unit at least comprises an air floating platform.

[0016] An optical measuring unit is connected to the air floating platform, and the optical measuring system at least comprises an upper measuring box and a lower measuring box, the upper measuring box is arranged above the air floating platform, and the upper measuring box is internally provided with a parallel light source, a light cutter and a fan.

[0017] The lower measuring box is arranged below the air floating platform, and the measuring hole of an integrating sphere in the lower measuring box is flush with the surface of the air floating platform, the lower measuring box is internally provided with a second light source, the second light source corresponds to a light passing hole two on the surface of the integrating sphere, and the lower measuring box is internally provided with a receiving probe one and a receiving probe two.

[0018] An operation control unit is electrically connected to the parallel light source, the second light source, the receiving probe one, the receiving probe two and the light cutter.

[0019] As a further description of the above technical solution, the bottom of the upper measuring box is provided with a light passing hole one.

[0020] As a further description of the above technical solution, the lower measuring box comprises two layers, the upper layer is fixed with an integrating sphere, one side of the integrating sphere is fixed with the second light source, a second light cutter is arranged between the second light source and the integrating sphere, the receiving probe one and the receiving probe two are fixed to the lower layer and connected to the integrating sphere box through optical fibers and interfaces.

[0021] As a further description of the above technical solution, the receiving detector one and the receiving detector two are a single spectrometer or a combination of multiple spectrometers.

[0022] As a further description of the above technical solution, the inner wall of the integrating sphere is a diffuse reflection coating, and the material of the diffuse reflection coating is PTFE or barium sulfate.

[0023] As a further description of the above technical solution, the measuring hole of the integrating sphere and the light transmission hole are both provided with encapsulating glass.

[0024] The beneficial effects of the present application are as follows:

[0025] 1. The optical measuring instrument can simultaneously complete the measurement of transmitted light and reflected light, calculate and output the optical properties of reflectance spectrum, transmittance spectrum, visible light reflectance, visible light transmittance, photovoltaic reflectance, photovoltaic transmittance, color parameters (including but not limited to: Y, x, y, L*, a*, b*), film thickness, etc.

[0026] 2. The optical measuring instrument adopts a double optical path optical design, realizes synchronous measurement of straight-through light source signals and sample signals, reduces environmental interference, and greatly improves data accuracy. At the same time, the present application optimizes the structure design of the integrating sphere to reduce the influence of the sample surface, cooperates with the special parallel light source system, and further improves the measurement accuracy of the instrument from the system.

[0027] 3. The optical measuring instrument is configured with an integrating sphere, and can measure characteristic samples such as diffuse reflection, specular reflection, diffuse transmission, and regular transmission, and can be widely applied to the optical performance measurement of embossed glass, float glass, optical plastic and other material samples.

[0028] 4. The parallel light source can well suppress the influence of stray light on the effective parallel light beam, and can adjust the effective light beam diameter to better match the design requirements of the optical instrument, thereby greatly improving the measurement accuracy of the optical instrument.

[0029] 5. The optical measuring instrument adopts a large-size measuring platform, and is configured with a suspension type measuring box body, which can meet the measurement of different specifications of samples in a size range of 3000*1500mm and 100*100mm.

[0030] To more clearly illustrate the structural features and effects of the present application, the present application will be described in detail below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a perspective view of the parallel light source provided by the present application.

[0032] Figure 2 is a sectional view of the parallel light source.

[0033] Figure 3 is a front view of the optical measuring instrument.

[0034] Figure 4 is a top view of the optical measuring instrument.

[0035] Figure 5 is a front sectional view of the optical measuring instrument.

[0036] Figure 6 is a side sectional view of the optical measuring instrument.

[0037] Figure 7 is a top sectional view of the upper measuring box of the optical measuring instrument.

[0038] Figure 8 is an attached sectional view of the optical measuring instrument.

[0039] Figure 9 is a schematic diagram of the upper integrating sphere and the lower integrating sphere optical system measuring white ink with diffuse reflection characteristics.

[0040] Figure 10 is a schematic diagram of the upper integrating sphere and the non-parallel light source measurement.

[0041] Figure 11 is a schematic diagram of the lower integrating sphere and the parallel light source measurement.

[0042] Reference signs: 1, base box; 2, air floating platform; 3, expansion support; 4, upper measuring box; 5, lower measuring box; 6, parallel light source; 601, light source fixing support; 602, lamp bead one; 603, collimator; 604, light limiting plate one; 605, light limiting plate two; 606, heat sink; 7, light cutter one; 8, fan; 9, light hole one; 10, light source two; 11, light cutter two; 12, integrating sphere; 13, measuring hole; 14, light hole two; 17, optical fiber interface; 18, operation control unit. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application.

[0044] As Figures 1-2As shown, in one embodiment, a parallel light source 6 includes a light source fixing support 601, on which a heat sink 606 is fixed. The light source fixing support 601 is a hardware base, which provides a fixing base for other optical parts. The heat sink 606 has a heat dissipation function, which prevents the internal overheating of the lamp bead, thereby improving the stability and service life of the light source.

[0045] A lamp bead one 602 is arranged in the heat sink 606, and the lamp bead one 602 is used for generating light. Specifically, the lamp bead one 602 is the light source of the parallel light source 6, which is stably powered by a high-precision constant-voltage constant-current power supply, and the position of the lamp bead one 602 can be finely adjusted by the fixing support.

[0046] A collimator 603 is arranged at one end of the heat sink 606, and the position of the collimator 603 corresponds to the position of the lamp bead one 602. Specifically, the collimator 603 is located in front of the lamp bead one 602, which is composed of a collimating cylinder, a convex lens and a flat lens, and is used for collimating the light emitted by the lamp bead one 602 to obtain a parallel light beam. By arranging the collimator 603, the influence of stray light on the effective light beam can be further suppressed.

[0047] A light limiting plate one 604 is arranged in the heat sink 606, and the light limiting plate one 604 is arranged between the collimator 603 and the lamp bead one 602, and is used for limiting the passage of stray background light.

[0048] A light limiting plate two 605 is arranged on the front side of the collimator 603, which is used for limiting the size of the light spot.

[0049] Optionally, the light limiting plate one 604 and the light limiting plate two 605 are both provided with an opening on the surface. The size of the opening aperture of the light limiting plate one 604 is 1mm-10mm, and preferably 3mm-6mm. The size of the opening aperture of the light limiting plate two 605 is 5mm-30mm.

[0050] Through the above technical solution, the light of the parallel light source 6 is perpendicular to the light-incident sample, so the thickness of the sample will not change the direction of the incident light. At the same time, the uniformity of the light spot of the parallel light source 6 on the sample is better, which can provide more stable incident light spectrum, and further improve the stability and measurement accuracy of the optical instrument. At the same time, through the cooperation of the light limiting plate one 604 and the light limiting plate two 605, the stray light generated by the glass cover and the filament foot of the lamp bead can be effectively removed, which reduces the influence on the parallel characteristic of the light beam of the parallel light source 6. At the same time, through the opening of the light limiting plate two 605, the diameter of the light beam of the parallel light source 6 can be adjusted, which can effectively improve the performance of the optical instrument.

[0051] As Figures 3-8As shown, a high-precision optical measuring instrument using the above parallel light source 6, the entire optical measuring instrument, the optical measuring instrument adopts a modular structure, which is specifically composed of a base support unit, an optical measuring unit, an operation control unit 18 and an auxiliary system.

[0052] The base support unit includes a base box 1, which provides support for all functional components and electronic components. The base box 1 has a cuboid structure. A plurality of moving wheels are arranged at the bottom of the base box 1, so that the entire optical measuring instrument can be moved, which is more suitable for laboratory and industrial scenes.

[0053] An air floating platform 2 is arranged on the upper surface of the base box 1. The upper surface of the air floating platform 2 is densely covered with air outlets. High-pressure air flow can be sprayed from the air outlets, and the high-pressure air flow can form a suspended air film. By controlling the air flow pressure of the suspended air film, the friction between the glass sample and the platform can be effectively eliminated, which can protect the glass product and improve the operation convenience.

[0054] Expansion supports 3 are arranged on both sides of the air floating platform 2, which are used to expand the support platform of the air floating platform 2, and can measure larger size glass samples. The expansion supports 3 are fixed at both ends of the base box 1, and can be unfolded or stored according to actual needs.

[0055] The optical measuring unit includes an upper measuring box 4 and a lower measuring box 5. The upper measuring box 4 is suspended above the air floating platform 2, and the lower measuring box 5 is fixed below the air floating platform 2. An integrating sphere 12 is arranged in the lower measuring box 5. The measuring hole 13 of the integrating sphere 12 of the lower measuring box 5 is located at the center position of the air floating platform 2, and the measuring hole 13 of the integrating sphere 12 is flush with the platform of the air floating platform 2. The upper measuring box 4 and the air floating platform 2 leave a certain gap, which is used for sample passing and conveniently placing the glass sample on the air floating platform 2.

[0056] A parallel light source 6, a light cutter 7 and a fan 8 are fixed in the upper measuring box 4. The parallel light source 6 emits parallel light. The light cutter 7 is composed of a motor and a light cutting baffle, which is used to control the opening and closing of the corresponding light path of the parallel light source 6. The fan 8 is used to cool the parallel light source 6, so as to maintain the stability and service life of the light source. A light hole 9 is arranged at the corresponding position of the bottom of the upper box and the measuring hole 13, which is used for the light emitted by the parallel light source 6 to enter the measuring hole 13.

[0057] The lower measuring box 5 is divided into two layers, the upper layer is fixed with light source two 10, light cutter two 11, integrating sphere 12 fan 8 and light cutter controller and other components, the lower layer is fixed with receiving detector one, receiving detector two and other components. Light source two 10 is non-parallel light, which enters integrating sphere 12 through light hole two 14 of integrating sphere 12. Light cutter two 11 is composed of motor and light cutter baffle, which is used to control the opening and closing of the corresponding light path of light source two 10. Fan 8 is used to cool light source two 10, maintain light source stability and service life. Light cutter controller is used to control light cutter.

[0058] The integrating sphere 12 is described in detail. The integrating sphere 12 is located in the upper layer of the lower measuring box 5 and is fixed at the center position of the air floating platform 2. The measuring hole 13 is flush with the air floating platform 2, which ensures that the measured sample can be closely attached to the integrating sphere 12 and ensures that all reflected light or transmitted light can enter the integrating sphere 12. The integrating sphere 12 has four openings, which are the measuring hole 13 corresponding to the light path of the parallel light source 6, the light hole two 14 corresponding to the light path of the light source two 10, the optical fiber interface 17 of the receiving detector one and the optical fiber interface 17 of the receiving detector two. Among them, the measuring hole 13 is both the light hole corresponding to the light path of the parallel light source 6 and the sample placing measuring hole 13.

[0059] Optionally, a high-precision constant voltage and constant current power supply is arranged in the base box 1, which is used to stably power the parallel light source 6 and the light source two 10.

[0060] The receiving detector one and the receiving detector two are located in the lower layer of the lower measuring box 5, which is used to receive and process the optical signal transmitted from the integrating sphere 12, and convert the optical signal into digital signal and obtain by the computer intelligent program.

[0061] Optionally, the operation control unit 18 is composed of a computer and an intelligent program. The computer host is fixed in the base box 1, and the operation surface is flush with the box plate, which is convenient for switch operation. The computer screen and mouse keyboard are movable above the air floating platform 2, which supports real-time operation, parameter setting and data visualization. Based on the computer, the intelligent program controls the opening and closing of the light path corresponding to the parallel light source 6 and the light source two 10, processes and calculates the digital signal output by the receiving detector one and the receiving detector two, and outputs the full function optical parameter.

[0062] Optionally, in order to control and expand the effective wavelength range of the optical instrument, the receiving detector one and the receiving detector two can be a single spectrometer or a combination of multiple spectrometers. In order to measure the spectrum of the wavelength range of 300-1100nm, the receiving detector one and the receiving detector two only need to be set as a single spectrometer, and the used spectrometer adopts a CCD or CMOS sensor. In order to measure the spectrum of the wavelength range of 300-2500nm, the receiving detector one and the receiving detector two need to be composed of two spectrometer instruments, one of which is a CCD or CMOS sensor, and the other of which is an InGaAs sensor.

[0063] Optionally, the inner wall of the integrating sphere 12 is coated with PTFE or barium sulfate as a high diffuse reflection coating to ensure that the integrating sphere 12 has very high light uniformity. More preferably, the inner wall material of the integrating sphere 12 is high-temperature formed PTFE, which has higher reflectivity and is very stable and will not discolor over time. Another material is PTFE sprayed material, which will reduce the reflectivity due to the addition of adhesive during the spraying process, thereby reducing the performance of the integrating sphere 12. Another material is barium sulfate, which is a relatively widely used material, but it will yellow over time, thereby reducing the overall performance of the integrating sphere 12 and the optical instrument.

[0064] Optionally, the measurement hole 13 and the light transmission hole two 14 of the integrating sphere 12 are packaged with high-transmission glass, which can effectively prevent dust in the measurement environment from entering the integrating sphere 12 and reducing the reflectivity of the inner wall of the integrating sphere 12, thereby affecting the performance of the integrating sphere 12. Under the protection of the packaging glass, the inner wall of the integrating sphere 12 can be kept clean for a long time, thereby greatly improving the service life of the system. Another advantage of using high-transmission glass is to ensure that the light energy of the measurement hole 13 and the light transmission hole can normally pass through, and in combination with the special optical system design and algorithm of the instrument, the packaging glass of the integrating sphere 12 can protect the integrating sphere 12 from dust while not affecting the measurement accuracy of the instrument.

[0065] In order to more conveniently understand the technical solutions of the present application, the operation steps and the corresponding principles are described as follows:

[0066] The glass sample is placed on the air floating platform 2, which has an opening at the center corresponding to the measurement hole 13 of the integrating sphere 12. The measurement hole 13 is on the light path of the parallel light source 6, and there is another opening at the other place of the integrating sphere 12 corresponding to the light source two 10, which is called the light transmission hole two 14 and is on the light path of the light source two 10. The light emitted by the light source two 10 enters the integrating sphere 12 through the light transmission hole two 14.

[0067] When the corresponding light path of the parallel light source 6 is started, the corresponding light path of the light source two 10 is closed, and the light emitted by the parallel light source 6 first transmits through the sample and then enters the integrating sphere 12 through the measurement hole 13.

[0068] When the light source two 10 corresponding light path is started, the parallel light source 6 corresponding light path is closed, the light emitted by the light source two 10 directly enters the integrating sphere 12 through the corresponding light transmission hole two 14, and after being homogenized by the integrating sphere 12, the light is applied to the sample through the measuring hole 13 and is reflected into the integrating sphere 12 again.

[0069] It should be noted that when calibrating, the measuring hole 13 is placed with a standard plate or air; when measuring, the measuring hole 13 is placed with the sample to be measured.

[0070] The receiving detector one and the receiving detector two have the functions of receiving light signals, splitting light, and converting light signals into digital signals. The mixed straight-through light source signals or sample light signals of the integrating sphere 12 are transmitted to the two detectors, i.e., the receiving detector one and the receiving detector two, through corresponding optical fibers, the detectors respectively convert the received sample light signals into digital signals, and the computer and the intelligent program obtain the digital signals. After the computer and the intelligent program obtain the digital signals, the data are processed, the light source signals and the sample signals are analyzed, and the corresponding optical parameters are calculated through internal algorithms. After the computer and the intelligent program complete the calculation of the optical parameters, the data are stored and displayed.

[0071] The related data of the present application will be described below in combination with three embodiments.

[0072] The integrating sphere 12 is below the air floating platform 2, the diameter of the integrating sphere 12 is 150 mm, the diameter of the measuring hole 13 is 25 mm, the light transmission hole diameter of the light source 2 is 10 mm, and PTFE material is used in the integrating sphere 12. The measuring hole 13 of the integrating sphere 12 is flush with the air floating platform 2, which ensures that the sample is tightly attached to the integrating sphere 12, and when measuring the diffuse reflection sample, light in different diffuse reflection directions can all enter the integrating sphere 12, thereby ensuring the accuracy of the measurement results. In comparison, if the integrating sphere 12 is on the top, there is a certain gap between the sample and the integrating sphere 12, so that part of the light in a certain direction cannot enter the interior of the integrating sphere 12, so that the measured result is lower than the actual value, i.e., the error of the result when the integrating sphere 12 is on the top is larger.

[0073] As shown in FIG. 1, the integrating sphere 12 is on the top, and the distance between the measuring hole 13 of the integrating sphere 12 and the sample is 20 mm. Figure 9

[0074] As shown in FIG. 2, the integrating sphere 12 is on the top, and the distance between the measuring hole 13 of the integrating sphere 12 and the sample is 20 mm. Figure 10 As shown in FIG. 3, the integrating sphere 12 is on the top, and the distance between the measuring hole 13 of the integrating sphere 12 and the sample is 20 mm.

[0075] Figure 11 ​​The measurement value is shown in the figure, that is, the integrating sphere is below the parallel light source. Specifically, the integrating sphere 12 is below the air floating platform 2, the diameter of the integrating sphere 12 is 150 mm, the diameter of the measuring hole 13 is 25 mm, the light aperture of the light source 2 is 10 mm, and PTFE is used in the integrating sphere 12. The measuring hole 13 of the integrating sphere 12 is flush with the air floating platform 2, so as to ensure that the sample is close to the integrating sphere 12, and the light source is replaced by the original non-parallel light to the parallel light source 6.

[0076] When measuring the transmittance, for the optical system of the non-parallel light source 6 and the integrating sphere 12 on the top, since the incident light is in all directions, and since there is a gap between the sample and the measuring hole 13 of the integrating sphere 12, different thicknesses of glass have different effects on the incident light, so in order to ensure the accuracy of the measurement, the corresponding thickness of the glass standard sample needs to be calibrated to obtain accurate measurement results. If a glass of a certain thickness is used for calibration, and other thicknesses of glass are measured, the measurement results will have errors due to the different effects of different thicknesses on light. Figure 10 The transmittance spectra of 2 mm glass and 3.2 mm glass are measured after calibration with 2 mm glass as a reference. From the data, the transmittance of 3.2 mm glass is higher than that of 2 mm glass, which obviously has a large error.

[0077] When measuring the transmittance, the integrating sphere 12 is below, the measuring hole 13 is flush with the air floating platform 2, and the parallel light source 6 is used as the incident light, so that the parallel light is perpendicular to the glass surface, and the change of the glass thickness will not change the direction of the incident light. At the same time, since the glass sample is close to the integrating sphere 12, it can be ensured that all the incident light can smoothly enter the integrating sphere 12, and the glass thickness has nothing to do with it. Figure 11 The transmittance spectra of 2 mm glass and 3.2 mm glass are measured after calibration with air as a reference. Table 1 shows the transmittance of 2 mm glass and 3.2 mm glass measured by the non-parallel light source 6 above the integrating sphere 12 and the parallel light source 6 below the integrating sphere 12.

[0078]

[0079]

[0080] Table 1

[0081] Among them, TD65 refers to the visible light transmittance, and TAM1.5 refers to the photovoltaic transmittance. As can be seen from the above table, in the case of the same material, the thicker the glass, the lower the transmittance. By comparing the measurement data, the transmittance of the 3.2 mm glass measured by the integrating sphere above the non-parallel light source is higher than that of the 2.0 mm glass sample, which is different from the actual situation.

[0082] The result of the measurement of the parallel light source under the integrating sphere is that the transmittance of the 3.2mm glass is slightly lower than that of the 2.0mm glass sample, which is consistent with the actual situation.

[0083] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A parallel light source, characterized by, The light source fixing support is fixed with a heat sink; A first lamp bead is arranged in the heat sink and used for generating light; A collimator is arranged at one end of the heat sink and corresponds to the position of the first lamp bead; A first light limiting plate is arranged in the heat sink and between the collimator and the first lamp bead; A second light limiting plate is arranged at the front side of the collimator.

2. The parallel light source according to claim 1, characterized by The collimator comprises a collimator cylinder, which is internally provided with a convex lens and a flat lens.

3. The parallel light source according to claim 1, wherein The first light limiting plate and the second light limiting plate are both provided with a hole.

4. The parallel light source according to claim 1, wherein The inner diameter of the hole on the surface of the first light limiting plate is 1-10 mm, and the inner diameter of the hole on the surface of the second light limiting plate is 5-30 mm.

5. A high-precision optical measuring instrument using the parallel light source according to any one of claims 1 to 4, characterized in that, The base support unit comprises at least an air floating platform; An optical measurement unit is connected to the air floating platform and comprises at least an upper measurement box and a lower measurement box. The upper measurement box is arranged above the air floating platform and is internally provided with a parallel light source, a light cutter and a fan. The lower measurement box is arranged below the air floating platform and is internally provided with an integrating sphere whose measurement hole is flush with the surface of the air floating platform.

6. The high precision optical measuring instrument according to claim 5, characterized in that The lower measurement box is internally provided with a second light source corresponding to a light passing hole two on the surface of the integrating sphere, a first receiving detector and a second receiving detector.

7. The high precision optical measuring instrument according to claim 5, characterized in that, An operation control unit is electrically connected to the parallel light source, the second light source, the first receiving detector, the second receiving detector and the light cutter.

8. The high precision optical measuring instrument according to claim 5, characterized in that, The bottom of the upper measurement box is provided with a light passing hole one.

9. The high precision optical measuring instrument according to claim 5, characterized in that, The lower measurement box comprises two layers, the upper layer of which is fixed with the integrating sphere, one side of which is fixed with the second light source.

10. The high precision optical measuring instrument according to claim 5, characterized in that, The first receiving detector and the second receiving detector are fixed to the lower layer and are connected to the integrating sphere box through optical fibers and interfaces. The first receiving detector and the second receiving detector are single spectrometers or a combination of multiple spectrometers. The inner wall of the integrating sphere is coated with a diffuse reflection coating, which is made of PTFE or barium sulfate. The measurement hole of the integrating sphere and the light passing hole two are both provided with encapsulating glass.

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