Light source measuring device and light source measuring system

Abstract

The utility model discloses a light source measuring device and a light source measuring system, and relates to the technical field of measurement, and the light source measuring device comprises a first polarization member, a second polarization member, a driving motor and a position detection element. The second polarization part is arranged on one side of the first polarization part and located on the optical axis path of the first polarization part, and the second polarization part can rotate around an axis; the driving motor is connected with the second polarization part, and the driving motor is used for driving the second polarization part to rotate; the position detection element is used for detecting the relative position of the second polarization part so that the driving motor can drive and adjust the rotation angle of the second polarization part according to the relative position of the second polarization part. According to the light source measuring device, the driving motor can adjust the rotation angle of the second polarization piece according to the relative position of the second polarization piece, the rotation angle of the second polarization piece can be automatically adjusted, automation of light source measurement is achieved, the light source measuring efficiency can be improved, and the light source measuring accuracy and reliability can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of measurement, and particularly relates to a light source measurement device and a light source measurement system. Background Art

[0002] In the related art, in the field of optical measurement, a spectrometer is usually used to measure the optical parameters of a light-emitting element. The spectrometer has a certain measurement range for light. For high-brightness light, it will exceed the measurement range of the spectrometer and become saturated, and the measured spectral curve is an incomplete curve.

[0003] In order to measure a high-brightness light source, optical elements such as a filter can be used to weaken the light emitted by it, so that the intensity of the light emitted by the high-brightness light source decays to within the measurement range of the spectrometer. However, at present, when light source manufacturers in the market measure a high-brightness light source, they manually weaken the high-brightness light, resulting in low measurement efficiency. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a light source measurement device, which can improve the light source measurement efficiency.

[0005] The utility model also provides a light source measurement system with the above light source measurement device.

[0006] According to the light source measurement device of the first aspect embodiment of the utility model, it includes:

[0007] A first polarizing element;

[0008] A second polarizing element, arranged on one side of the first polarizing element and on the optical axis path of the first polarizing element, and the second polarizing element can rotate around an axis;

[0009] A driving motor, connected to the second polarizing element, and the driving motor is used to drive the second polarizing element to rotate; and

[0010] A position detection element, used to detect the relative position of the second polarizing element, so that the driving motor drives and adjusts the rotation angle of the second polarizing element according to the relative position of the second polarizing element.

[0011] According to the light source measurement device of the embodiment of the utility model, it has at least the following beneficial effects:

[0012] By setting two groups of polarizers, namely the first polarizer and the second polarizer, the attenuation effects of the two groups of polarizers on light are superimposed, enabling the light source measurement device to have a greater attenuation ability. The light intensity of an ultra-high brightness light source can be weakened to meet the measurement range of the spectrometer, enabling the measurement of ultra-high brightness light sources and expanding the usage range of the light source measurement device. The second polarizer is configured to be rotatable, and the second polarizer has different attenuation abilities for incident light at different rotation angles. By adjusting the rotation angle of the second polarizer, the light intensity of different light sources to be measured can be weakened to the light intensity required for measurement, making the light source measurement device of the present invention universal and further increasing the usage range of the light source measurement device. The present utility model also detects the relative position of the second polarizer through a position detection element, enabling the drive motor to adjust the rotation angle of the second polarizer according to the relative position of the second polarizer, automatically adjusting the rotation angle of the second polarizer, and realizing the automation of light source measurement. This can not only improve the light source measurement efficiency but also improve the accuracy and reliability of light source measurement.

[0013] According to some embodiments of the present utility model, the light source measurement device further includes a carrier. The carrier is provided with a receiving groove to receive the second polarizer, and the carrier is rotatable to drive the second polarizer to rotate; the carrier is relatively spaced from the position detection element. The carrier includes a first surface facing the position detection element, and the first surface is provided with a marked pattern for the position detection element to detect and identify.

[0014] According to some embodiments of the present utility model, the position detection element is a photoelectric sensor;

[0015] The marked pattern includes:

[0016] A first marked pattern extending in a strip shape from the outer edge of the first surface towards the rotation axis of the carrier; and

[0017] A second marked pattern connected to both sides of the first marked pattern and arranged around the rotation axis of the carrier;

[0018] Wherein, the reflectivity of the first marked pattern to light is greater than the reflectivity of the second marked pattern to light, or the reflectivity of the first marked pattern to light is less than the reflectivity of the second marked pattern to light.

[0019] According to some embodiments of the present utility model, the light source measurement device further includes a control system. The control system is electrically connected to the position detection element. When the position detection element recognizes the first marked pattern, the control system sets the current position of the drive motor as the zero position to control the drive motor to drive and adjust the rotation angle of the second polarizer according to the zero position.

[0020] According to some embodiments of the present invention, the position of the first marking pattern relative to the carrier is configured as follows: when the position detection element recognizes the first marking pattern, the second polarizer can allow the incident light passing through the second polarizer to be completely transmitted.

[0021] According to some embodiments of the present utility model, the light source measuring device further includes a transmission mechanism, which can be driven by the drive motor to rotate to drive the bearing member to rotate, and the transmission mechanism includes:

[0022] a worm connected to the output shaft of the drive motor; and

[0023] The worm wheel part is connected to the outer periphery of the bearing component and meshes with the worm.

[0024] According to some embodiments of the present utility model, the driving motor is a hollow shaft motor, the driving motor includes a hollow shaft, and the second polarizer is disposed in the hollow shaft.

[0025] According to some embodiments of the present utility model, the light source measuring device further includes:

[0026] A mounting base, used for supporting the first polarizer, the second polarizer and the driving motor;

[0027] a spectrometer connected to the mounting base and located on a side of the second polarizer facing away from the first polarizer; and

[0028] A collimating lens is disposed between the second polarizer and the spectrometer, and one end of the collimating lens is connected to the spectrometer, and the other end of the collimating lens is opposite to the second polarizer.

[0029] According to some embodiments of the present utility model, the light source measuring device further includes:

[0030] A light shield is connected to the mounting base and covers the mounting base to form a light shielding cavity, so as to cover the first polarizer, the second polarizer and the position detection element in the light shielding cavity. The light shield is also provided with a first through hole for the collimating lens to pass through, and the first through hole is sealed with the outer peripheral wall of the collimating lens.

[0031] According to some embodiments of the present utility model, the mounting seat is provided with a mounting hole penetrating the mounting seat along the thickness direction, and the first polarizer is arranged in the mounting hole;

[0032] The light source measuring device further includes an integrating sphere, which is connected to the side of the mounting base facing away from the light shielding cover. The integrating sphere includes a spherical body, and a light incident port and a light exit port are respectively arranged at two opposite ends of the spherical body. The light exit port is coaxially arranged with the light incident port, and the light exit port is communicated with the mounting hole.

[0033] The light source measuring system according to the second aspect embodiment of the present invention includes a light source to be measured and the light source measuring device according to any of the above embodiments.

[0034] According to some embodiments of the present invention, a light incident port is arranged on one side of the light source measuring device;

[0035] The light source measuring system includes a moving mechanism, which is used to convey the light source to be measured so as to convey the light source to be measured to be opposite to the light incident port.

[0036] The additional aspects and advantages of the present invention will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0037] The following further describes the present invention in conjunction with the drawings and embodiments, where:

[0038] Figure 1 is the first cross-sectional view of the light source measuring device according to the embodiment of the present invention;

[0039] Figure 2 is Figure 1 the partial enlarged view at A in

[0040] Figure 3 is the plan view of the marking pattern according to the embodiment of the present invention;

[0041] Figure 4 is the exploded view of the light source measuring device according to the embodiment of the present invention;

[0042] Figure 5 is the partial structural view of the light source measuring device according to the embodiment of the present invention showing the second polarizing element;

[0043] Figure 6 is the cross-sectional view of the first polarizing element, the second polarizing element and the mounting base of the light source measuring device according to the embodiment of the present invention;

[0044] Figure 7 is the complete structural view of the light source measuring device according to the embodiment of the present invention;

[0045] Figure 8 is the structural view of the light source measuring system according to the embodiment of the present invention.

[0046] Reference numerals of the attached drawings:

[0047] Light source measuring device 10;

[0048] First polarizing element 100; Second polarizing element 200; Position detecting element 300; Collimating lens 400; Spectrometer 500;

[0049] Carrier 600; Main body portion 610; Accommodating groove 611; Rotating shaft portion 620; Light transmitting hole 621;

[0050] Marking pattern 630; First marking pattern 631; Second marking pattern 632;

[0051] Drive assembly 700; Drive motor 710; Transmission mechanism 720; Worm 721; Worm gear portion 722;

[0052] Mounting plate 730; Coupling 740; Mounting assembly 800;

[0053] Mounting seat 810; First through hole 811; Second through hole 812; Third through hole 813;

[0054] First step surface 814; Second step surface 815;

[0055] Light shield 820; Light shielding cavity 821; First perforation 822;

[0056] Bearing 830; First fastening screw 840; Second fastening screw 850; Connecting rod 860;

[0057] Integrating sphere 900; Sphere 910; Light incident port 911; Light exit port 912;

[0058] Light source measuring system 1000; Moving mechanism 20; X-axis moving module 21; Y-axis moving module 22. Detailed implementation manners

[0059] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0060] In the description of the present utility model, it should be understood that the orientation or positional relationship involved, such as up, down, etc., indicates the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0061] In the description of the present utility model, "a plurality of" refers to more than two. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0062] In the description of the present utility model, unless otherwise clearly defined, words such as "arrangement", "installation", "connection", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0063] This application provides a light source measuring device.

[0064] Specifically, the light source measuring device provided by this application is used to measure a light source to obtain a spectrogram of the light source, which can also be called a spectral curve. The spectrogram includes the wavelength of the light source and the light intensity corresponding to each wavelength, and it can be determined whether the measured light source meets the production requirements according to the spectrogram.

[0065] In the related art, a spectrometer is usually used to measure a light source. However, the measurement range of the spectrometer is limited. For some high-brightness light sources, it exceeds the measurement range of the spectrometer and becomes saturated (commonly known as "exploding"), resulting in the spectral curve measured by the spectrometer not being a complete curve. To measure high-brightness light sources, the light emitted by the high-brightness light source can be attenuated.

[0066] Please refer to Figure 1 , Figure 1 is the first cross-sectional view of the light source measuring device according to the embodiment of the present utility model. In the embodiment of this application, the light source measuring device 10 includes a first polarizing member 100 and a second polarizing member 200. The second polarizing member 200 is disposed on one side of the first polarizing member 100 and is located on the optical axis path of the first polarizing member 100.

[0067] Among them, the first polarizing member 100 and the second polarizing member 200 can be polarizing plates. It should be understood that a polarizing plate is an optical element that makes light become polarized light, and the polarizing plate has the function of shielding or transmitting incident light. When the polarizing plate is at a certain assembly angle, a part of the incident light irradiated on the polarizing plate can pass through, and a part of the light is blocked, and the light intensity of the incident light can be changed.

[0068] Then, by disposing the combination of the first polarizing member 100 and the second polarizing member 200 on the side where the spectrometer 500 collects light, such that the incident light emitted by the light source to be measured first passes through the first polarizing member 100 and the second polarizing member 200 and then enters the spectrometer 500 for measurement and analysis, the first polarizing member 100 and the second polarizing member 200 can attenuate the light intensity of the incident light to a certain brightness, enabling the attenuated incident light to satisfy the measurement range of the spectrometer 500, thereby enabling the measurement of a complete spectral curve.

[0069] It can be understood that in the embodiment of the present application, by providing two sets of polarizing films, namely the first polarizing member 100 and the second polarizing member 200, the attenuation effects of the two sets of polarizing films on light are superimposed, such that the light source measuring device 10 can have a relatively large attenuation ability, can weaken the light intensity of an ultra-high brightness light source to satisfy the measurement range of the spectrometer 500, can achieve the measurement of an ultra-high brightness light source, and can expand the usage range of the light source measuring device 10.

[0070] Among them, the second polarizing member 200 can be disposed on the light-incident side of the first polarizing member 100 or on the light-emitting side of the first polarizing member 100. In the accompanying drawings of the embodiment of the present application, the latter is taken as an example for illustration, and it should not be regarded as a limitation to the present application.

[0071] Light sources to be measured with different specifications have different light intensities. In order to attenuate the incident light of different light sources to an appropriate light intensity, the second polarizing member 200 is further configured to be rotatable about an axis.

[0072] By configuring the second polarizing member 200 to be rotatable, the second polarizing member 200 has different attenuation capabilities for incident light at different rotation angles. Then, the rotation angle of the second polarizing member 200 can be adjusted according to the light source to be measured with different brightnesses, and the light intensity of different light sources to be measured can be weakened to the light intensity required for measurement, enabling the light source measuring device 10 to have versatility and further increasing the usage range of the light source measuring device 10.

[0073] For example, taking the case where the second polarizing member 200 is disposed on the light-emitting side of the first polarizing member 100 as an example, for incident light with a slightly stronger light intensity such as the first incident light, after the first incident light is attenuated by the first polarizing member 100, its light intensity can satisfy the measurement range of the spectrometer 500. Then, the second polarizing member 200 can be rotated and adjusted to make the first incident light pass through completely, so that the first incident light is only attenuated once. For incident light with an overly strong light intensity such as the second incident light, after the second incident light is attenuated by the first polarizing member 100, its light intensity still exceeds the measurement range of the spectrometer 500. Then, the second polarizing member 200 can be rotated and adjusted to make the second incident light also be attenuated and weakened, such that the second incident light undergoes the attenuation effects of the first polarizing member 100 and the second polarizing member 200 twice.

[0074] The light source measuring device 10 further includes a driving motor 710 and a position detecting element 300. The driving motor 710 is connected to the second polarizing element 200, and the driving motor 710 is used to drive the second polarizing element 200 to rotate. The position detecting element 300 is used to detect the relative position of the second polarizing element 200, so that the driving motor 710 drives and adjusts the rotation angle of the second polarizing element 200 according to the relative position of the second polarizing element 200.

[0075] The driving motor 710 can be directly connected to the second polarizing element 200, and the output shaft of the driving motor 710 directly drives the second polarizing element 200 to rotate; the driving motor 710 can also be indirectly connected to the second polarizing element 200. For example, the output shaft of the driving motor 710 can be drivingly connected to the second polarizing element 200 through a transmission mechanism 720, and the driving motor 710 can drive the second polarizing element 200 to rotate through the transmission mechanism 720. Wherein, when the driving motor 710 is directly connected to the second polarizing element 200, the driving motor 710 can be a hollow shaft motor to avoid blocking the incident light.

[0076] The position detecting element 300 is used to detect the relative position of the second polarizing element 200. Specifically, the second polarizing element 200 (or the component carrying the second polarizing element 200) can be provided with a marked point position for the position detecting element 300 to identify, and the relative position of the second polarizing element 200 can be determined by detecting the marked point position. By controlling the driving motor 710 to drive the second polarizing element 200 to rotate, and at the same time the position detecting element 300 performs detection, when the position detecting element 300 identifies and detects the marked point position, it stops, and the position of the second polarizing element 200 at this time is used as the reference position. When performing subsequent measurements, the rotation of the second polarizing element 200 can be controlled according to this reference position, so as to determine how many degrees the second polarizing element 200 rotates specifically, so as to realize automatically adjusting the rotation angle of the second polarizing element 200 according to the measurement requirements.

[0077] Wherein, the position detecting element 300 can be a device such as a camera or a position sensor.

[0078] Then, in the embodiment of the present application, the position detecting element 300 is further used to detect the relative position of the second polarizing element 200, so that the driving motor 710 can adjust the rotation angle of the second polarizing element 200 according to the relative position of the second polarizing element 200, so as to facilitate the driving motor 710 to automatically adjust the rotation angle of the second polarizing element 200, realize automatically attenuating the light intensity of the light source to be measured to meet the measurement range, and realize the automation of light source measurement, which can not only improve the light source measurement efficiency, but also improve the accuracy and reliability of light source measurement.

[0079] Optionally, please refer to Figure 2 , Figure 2 For Figure 1A partial enlarged view of the position A in the figure. In one embodiment, the light source measuring device 10 further includes a carrier 600. The carrier 600 is provided with a receiving groove 611 for receiving the second polarizing element 200, and the carrier 600 is rotatable to drive the second polarizing element 200 to rotate.

[0080] It can be understood that the carrier 600 may be provided with a light-transmitting hole 621 communicating with the receiving groove 611, so that the incident light of the light source to be measured can pass through the light-transmitting hole 621 and irradiate the second polarizing element 200.

[0081] By providing the carrier 600 for receiving the second polarizing element 200, the carrier 600 can protect the second polarizing element 200. At the same time, it is easier to form a connection structure on the carrier 600 for rotatably connecting with the driving motor 710, so that the driving motor 710 can better drive the second polarizing element 200 to rotate. Moreover, the solid structure part of the carrier 600 is light-impermeable, and it is easier to set some marks on the carrier 600 for the position detection element 300 to identify and detect, so that the position detection element 300 can more accurately determine the relative position of the second polarizing element 200.

[0082] Exemplarily, in one embodiment, as Figure 2 shown, the carrier 600 and the position detection element 300 are relatively spaced apart. The carrier 600 includes a first surface (not labeled) facing the position detection element 300, and the first surface is provided with a marking pattern 630 for the position detection element 300 to detect and identify. Among them, the marking pattern 630 may be formed by a coating applied on the surface of the carrier 600, or may be formed by a sticker pasted on the surface of the carrier 600.

[0083] In one embodiment, the position detection element 300 is a photoelectric sensor. For example, the position detection element 300 may be a patch photoelectric sensor (also referred to as a reflective photoelectric switch).

[0084] The patch photoelectric sensor includes a transmitting unit and a receiving unit. The transmitting unit may include a transmitting lamp such as an infrared LED lamp, and the infrared LED lamp can emit infrared light to the outside. The receiving unit includes a photosensitive element, and the photosensitive element is used to receive the reflected light signal emitted by the infrared LED lamp to the outside and reflected back by an external obstacle, and the photosensitive element can convert the received reflected light signal into an electrical signal.

[0085] Please refer to Figure 3 , Figure 3It is a schematic plan view of the marking pattern of the embodiment of the present utility model. The marking pattern 630 includes a first marking pattern 631 and a second marking pattern 632. Among them, the reflectivity of the first marking pattern 631 to light is greater than that of the second marking pattern 632 to light, or the reflectivity of the first marking pattern 631 to light is less than that of the second marking pattern 632 to light.

[0086] Since the reflectivities of the first marking pattern 631 and the second marking pattern 632 to light are different, that is, the light reflection capabilities of the first marking pattern 631 and the second marking pattern 632 to light are different, the light intensities of the light after reflection of the same light by the two are different. Then, when the light emitted by the photoelectric sensor irradiates the first marking pattern 631 and the second marking pattern 632 respectively and is reflected, the light intensities of the reflected light received by the photoelectric sensor are different, and different voltages will be output.

[0087] Specifically, taking the example that the reflectivity of the first marking pattern 631 to light is greater than that of the second marking pattern 632 to light, after the light emitted by the photoelectric sensor irradiates the first marking pattern 631 and is reflected, the reflected light received by the photoelectric sensor has a higher light intensity, so that the voltage output by the photoelectric sensor is a high-level voltage; and after the light emitted by the photoelectric sensor irradiates the second marking pattern 632 and is reflected, the light intensity of the reflected light received by the photoelectric sensor is relatively low, so that the voltage output by the photoelectric sensor is a low-level voltage.

[0088] In this way, by emitting light to the surface of the carrier 600 through the photoelectric sensor and receiving the reflected light, and outputting the corresponding voltage, it can be judged which marking pattern the photoelectric sensor is currently facing according to the output voltage. Then, by specifically designing the shapes and positions of the first marking pattern 631 and the second marking pattern 632, it can be realized that the first marking pattern 631 or the second marking pattern 632 is used as the judgment basis for the reference position of the second polarizing element 200, so as to facilitate the driving motor 710 to adjust the rotation angle of the second polarizing element 200.

[0089] Exemplarily, in one embodiment, please continue to refer to Figure 3 , the first marking pattern 631 extends in a strip shape from the outer edge of the first surface towards the rotation axis of the carrier 600, and the second marking pattern 632 is connected to both sides of the first marking pattern 631 and is arranged around the rotation axis of the carrier 600.

[0090] Such as Figure 3As shown, the first marking pattern 631 is strip-shaped, and the second marking pattern 632 is generally annular. The area occupied by the first marking pattern 631 is much smaller than the area occupied by the second marking pattern 632. Most of the reflected light received by the photoelectric sensor is the light reflected back from the second marking pattern 632 it irradiates, causing the voltage output by the photoelectric sensor to be maintained at a voltage value for a long time (or fluctuate up and down within a small range). When the voltage output by the photoelectric sensor undergoes a very large numerical mutation, it means that the reflected light received by the photoelectric sensor at this time is the light reflected back from the first marking pattern 631 it irradiates. Therefore, the first marking pattern 631 can be used as the reference position of the second polarizing element 200 to accurately adjust the rotation angle of the second polarizing element 200.

[0091] Optionally, in one embodiment, the first marking pattern 631 is set as a black pattern, and the second marking pattern 632 is set as a white pattern.

[0092] Since the second polarizing element 200 rotates under the driving action of the driving motor 710, the change in the rotation angle of the second polarizing element 200 is actually achieved by controlling the rotation of the output shaft of the driving motor 710. In this regard, when the photoelectric sensor recognizes the first marking pattern 631, the position where the output shaft of the driving motor 710 is currently located can be used as the zero position to more accurately control the rotation of the output shaft of the driving motor 710.

[0093] In one embodiment, the light source measuring device 10 further includes a control system. The control system is electrically connected to the position detection element 300 and the driving motor 710. When the position detection element 300 recognizes the first marking pattern 631, the control system sets the position where the driving motor 710 is currently located as the zero position, so as to control the driving motor 710 to drive and adjust the rotation angle of the second polarizing element 200 according to the zero position.

[0094] Optionally, in one embodiment, the position of the first marking pattern 631 relative to the carrier 600 is configured such that when the position detection element 300 recognizes the first marking pattern 631, the second polarizing element 200 can make the incident light passing through the second polarizing element 200 completely pass through. That is to say, when the driving motor 710 drives the carrier 600 to rotate until the photoelectric sensor just detects the first marking pattern 631, that is, when the output shaft of the driving motor 710 is at the zero position, the angle at which the second polarizing element 200 is located can make the incident light completely pass through.

[0095] Further, the zero position is determined by detecting and identifying the first marking pattern 631 through the position detection element 300. When it is known that at the zero position, the second polarizing element 200 is in a state of allowing the incident light to pass through completely, then, the driving motor 710 can be controlled to drive the second polarizing element 200 to rotate, and the actual brightness of the light source to be measured after attenuation at each rotation angle can be measured. The attenuation ratio of the light by the second polarizing element 200 at this position can be calculated, and a relationship curve between the rotation angle of the output shaft of the driving motor 710 and the attenuation ratio of the second polarizing element 200 can be obtained. For example, the light intensity of the light source to be measured is 90000. When the output shaft of the driving motor 710 rotates 10° relative to the zero position, the light intensity of the light emitted by the light source to be measured after attenuation measured at this position is 80000. Then, at this position, the second polarizing element 200 can attenuate the incident light by 10%. These data can be recorded and a relationship curve can be generated through the control system.

[0096] Then, when it is necessary to attenuate the light intensity of the light source to be measured to a target light intensity, by calculating the required attenuation ratio, the corresponding rotation angle can be found through the above relationship curve, and the output shaft of the driving motor 710 can be directly controlled to rotate by the corresponding angle, which can greatly improve the light source measurement efficiency.

[0097] Optionally, in an embodiment, please refer to Figure 4 、 Figure 5 , Figure 4 which is the exploded view of the light source measurement device according to the embodiment of the present invention. Figure 5 Figure

[0098] shows a partial structural schematic diagram of the light source measurement device according to the embodiment of the present invention, with the second polarizing element exposed. The light source measurement device 10 further includes a transmission mechanism 720. The transmission mechanism 720 can rotate under the drive of the driving motor 710 to drive the carrier 600 to rotate. Among them, the driving motor 710 and the transmission mechanism 720 form the driving assembly 700 of the light source measurement device 10.

[0099] Exemplarily, such as Figure 5As shown, the transmission mechanism 720 may include a worm 721 and a worm wheel portion 722. The worm 721 is connected to the output shaft of the drive motor 710, the worm wheel portion 722 is connected to the outer peripheral edge of the carrier 600, and the worm wheel portion 722 meshes with the worm 721.

[0100] Specifically, the worm 721 may be connected to the output shaft of the drive motor 710 through a coupling 740. The rotation axis of the worm 721 coincides with the axis of the output shaft of the drive motor 710. The carrier 600 is drivingly connected to the worm 721 through the worm wheel portion 722, so that the rotation axis of the carrier 600 is perpendicular to the axis of the worm 721. When the drive motor 710 operates, the output shaft of the drive motor 710 drives the worm 721 to rotate together through the coupling 740. The worm 721 drives the worm wheel portion 722 to mesh and rotate. The worm wheel portion 722 can drive the carrier 600 to rotate synchronously, thereby realizing driving the second polarizing element 200 to rotate.

[0101] Among them, the worm wheel portion 722 may be a split connection structure connected to the carrier 600, or may be an integral structure with the carrier 600. Exemplarily, in one embodiment, the carrier 600 and the worm wheel portion 722 are integrally formed by machining from a shaft-shaped blank.

[0102] It should be noted that transmission tooth portions that mesh with each other are respectively provided on the worm 721 and the worm wheel portion 722 (the tooth portion structure is omitted and not shown in the figure). The attached drawings of this embodiment are only schematically shown in a simplified manner.

[0103] Optionally, in another embodiment, the drive motor 710 may also be a hollow shaft motor. The drive motor 710 includes a hollow shaft, and the second polarizing element 200 is disposed inside the hollow shaft.

[0104] For example, the second polarizing element 200 may be installed and fixed inside the hollow shaft through the carrier 600. At this time, the rotation axis of the carrier 600 coincides with the rotation axis of the hollow shaft. Since the inside of the hollow shaft is hollow, the incident light can pass through the hollow shaft and pass through the second polarizing element 200 without blocking the incident light. When the drive motor 710 operates, the hollow shaft directly drives the second polarizing element 200 to rotate.

[0105] It can be understood that in order to stably support the second polarizing element 200 on one side of the first polarizing element 100, the light source measuring device 10 may be provided with a mounting assembly 800. In one embodiment, the mounting assembly 800 includes a mounting base 810.

[0106] Among them, the mounting base 810 is used as the main bearing component of the light source measuring device 10 and is used for positioning, mounting and bearing. For example, the mounting base 810 is used to support the first polarizing element 100, the second polarizing element 200 and the drive motor 710.

[0107] Please combine with Figure 5 and refer to Figure 6 , Figure 6 This is a cross-sectional view of the assembly of the first polarizer, the second polarizer and the mounting base of the light source measuring device according to an embodiment of the present invention. The mounting base 810 is provided with a mounting hole that penetrates the mounting base 810 in the thickness direction. The mounting hole is a stepped hole, and the mounting hole includes a first through hole 811, a second through hole 812, and a third through hole 813 that are arranged from bottom to top along the thickness direction of the mounting base 810. The first through hole 811, the second through hole 812, and the third through hole 813 are communicated with each other.

[0108] The first polarizer 100 is disposed in the second through hole 812. Among them, the aperture of the second through hole 812 is larger than the aperture of the first through hole 811, so that a first step surface 814 is formed at the connection between the second through hole 812 and the first through hole 811. The first polarizer 100 is disposed on the first step surface 814, and the first step surface 814 can support the first polarizer 100.

[0109] As Figure 6 shown, the inner wall of the second through hole 812 can be provided with a first threaded hole (not labeled). The first threaded hole extends in the horizontal direction and penetrates the side wall of the mounting base 810. A first fastening screw 840 is disposed in the first threaded hole. By screwing the first fastening screw 840, one end of the first fastening screw 840 abuts against the first polarizer 100, and the first polarizer 100 can be pressed tightly in the second through hole 812 to prevent the first polarizer 100 from rotating.

[0110] The second polarizer 200 is disposed in the third through hole 813. Among them, the aperture of the third through hole 813 is larger than the aperture of the second through hole 812, so that a second step surface 815 is formed at the connection between the third through hole 813 and the second through hole 812, so as to facilitate the installation of the carrier 600 and the second polarizer 200.

[0111] The carrier 600 is rotatably disposed in the third through hole 813. To facilitate the rotation of the carrier 600, please continue to refer to Figure 6 , the carrier 600 can be rotatably installed in the third through hole 813 through a bearing 830. The second polarizer 200 is installed in the receiving groove 611 of the carrier 600. The carrier 600 is rotatably connected to the bearing 830. The whole of the carrier 600 and the bearing 830 is disposed on the second step surface 815, and the second step surface 815 bears the bearing 830, the carrier 600, and the second polarizer 200.

[0112] Specifically, the carrier 600 includes a main body portion 610 and a rotating shaft portion 620 connected to one side of the main body portion 610. The main body portion 610 is formed with the above-mentioned accommodation groove 611. The rotating shaft portion 620 is connected to the inner ring of the bearing 830, and the rotation of the inner ring of the bearing 830 can drive the carrier 600 to rotate. The rotating shaft portion 620 is also provided with a light-transmitting hole 621 communicating with the accommodation groove 611, and the light emitted from the first polarizing member 100 can irradiate the second polarizing member 200 through the light-transmitting hole 621.

[0113] The worm gear portion 722 is connected to the outer peripheral edge of the main body portion 610. It can be understood that, for the convenience of the transmission mechanism 720 to drive the carrier 600 to rotate, the rotating shaft portion 620 is designed to be relatively long so that the main body portion 610 extends out of the third through hole 813, and the main body portion 610 is located above the mounting seat 810, so that the worm gear portion 722 has enough space to engage with the worm 721.

[0114] Wherein, the hole wall of the third through hole 813 may be provided with a second threaded hole (not labeled). The second threaded hole extends along the horizontal direction and penetrates the side wall of the mounting seat 810. A second fastening screw 850 is arranged in the second threaded hole. By screwing the second fastening screw 850, one end of the second fastening screw 850 abuts against the outer ring of the bearing 830, and the outer ring of the bearing 830 can be tightly pressed in the third through hole 813, which can prevent the bearing 830 itself from rotating.

[0115] As Figure 5 shown, the driving motor 710 can be connected to the mounting seat 810 through the mounting plate 730 to realize the support and fixation of the driving motor 710.

[0116] Please combine Figure 1 and refer to Figure 7 , Figure 7 which is the complete structural schematic diagram of the light source measuring device according to the embodiment of the present invention. The light source measuring device 10 further includes a spectrometer 500 and a collimating lens 400.

[0117] Wherein, the spectrometer 500 is connected to the mounting seat 810 and is located on the side of the second polarizing member 200 away from the first polarizing member 100. The collimating lens 400 is arranged between the second polarizing member 200 and the spectrometer 500, and one end of the collimating lens 400 is connected to the spectrometer 500 and the other end is opposite to the second polarizing member 200.

[0118] It can be understood that the spectrometer 500 is the main measuring instrument of the light source measuring device 10 of the present application. The light emitted by the light source to be measured passes through the first polarizing element 100 and the second polarizing element 200 in sequence and finally enters the spectrometer 500. After the attenuation of the incident light by the first polarizing element 100 and the second polarizing element 200, the light intensity of the incident light can meet the measurement range of the spectrometer 500. The spectrometer 500 measures and analyzes the received light and outputs the spectrogram of the light source to be measured.

[0119] The collimating lens 400 is used to converge the light into parallel light, collimate the light entering the spectrometer 500, and enable the spectrometer 500 to output more accurate measurement results.

[0120] Since the spectrometer 500 is arranged at the topmost part of the light source measuring device 10, to ensure the stability of the assembly of the spectrometer 500, as Figure 7 shown, the mounting assembly 800 may further include a connecting rod 860. The connecting rod 860 is fixedly connected to the mounting base 810. The connecting rod 860 extends vertically to one side of the spectrometer 500, so that the spectrometer 500 can be fixed on the connecting rod 860 to stably support the spectrometer 500.

[0121] To prevent ambient light from entering the spectrometer 500 and interfering with the spectral measurement of the light source to be measured, the first polarizing element 100 and the second polarizing element 200 need to be arranged in a closed environment to isolate the ambient light.

[0122] Exemplarily, please refer to Figure 6 again. The light source measuring device 10 further includes a light shield 820. The light shield 820 is connected to the mounting base 810 and forms a light-shielding cavity 821 with the mounting base 810 to cover the first polarizing element 100, the second polarizing element 200, and the position detection element 300 in the light-shielding cavity 821. The light shield 820 is also provided with a first through hole 822 for the collimating lens 400 to pass through. The first through hole 822 is in sealing fit with the outer peripheral wall of the collimating lens 400.

[0123] It can be understood that the material of the light shield 820 is a light-impermeable material, which prevents ambient light from entering the light-shielding cavity 821 and mixing with the incident light of the light source to be measured, thereby interfering with the measurement accuracy.

[0124] Specifically, the aperture of the first through hole 822 can be set to be slightly larger than the outer peripheral wall of the collimating lens 400, so that the rotating shaft lens can smoothly pass through the first through hole 822 and be connected to the light shield 820. After the light shield 820 and the device lens are assembled, a filling sealant can be applied between the first through hole 822 and the outer peripheral wall of the collimating lens 400 to seal the gap between the first through hole 822 and the outer peripheral wall of the collimating lens 400, preventing ambient light from entering the light-shielding cavity 821 through the gap between the through hole and the collimating lens 400.

[0125] In which, since the second polarizer 200 is driven by the transmission mechanism 720 and the carrier 600 to rotate, in order to realize the rotation of the second polarizer 200 in the light shielding cavity 821, as shown in FIG. Figure 6 As shown, the transmission mechanism 720 and the carrier 600 are also covered by the light shielding cover 820 and disposed in the light shielding cavity 821 .

[0126] In order to reduce the volume of the light shield 820 and to facilitate the heat dissipation of the drive motor 710, the drive motor 710 is arranged on the outside of the light shield 820. Specifically, a second through hole (not shown) can be provided on the side of the light shield 820 close to the drive motor 710, so that the output shaft of the drive motor 710 passes through the second through hole and extends into the light shielding cavity 821 to connect with the worm 721; or, an opening can be provided on the side of the light shield 820 close to the drive motor 710, and the shape of the opening is adapted to the shape of the outer shell of the drive motor 710, and the light shield 820 can be connected to the outer shell of the drive motor 710, and the opening is closed by the outer shell of the drive motor 710, so that the outer shell of the drive motor 710 and the light shield 820 together cover and seal the above components in the light shielding cavity 821.

[0127] Optional, please refer to Figure 1 and Figure 7 The light source measuring device 10 also includes an integrating sphere 900, which is connected to the side of the mounting base 810 away from the light shield 820. The integrating sphere 900 includes a sphere 910, and the two opposite ends of the sphere 910 are respectively provided with a light inlet 911 and a light outlet 912. The light outlet 912 is coaxially arranged with the light inlet 911, and the light outlet 912 is connected to the first through hole 811.

[0128] Integrating sphere 900, also known as diffuse reflection sphere, is an optical measurement tool. The inside of integrating sphere 900 is coated with diffuse reflection material. When the incident light enters integrating sphere 900, it can be reflected and scattered multiple times inside integrating sphere 900, and finally form a uniform light field, so that the illumination at any point inside integrating sphere 900 is the same, which can ensure the accuracy of the light source measurement results.

[0129] Of course, the integrating sphere 900 can also block the ambient light, preventing the ambient light from directly irradiating the first polarizer 100 through the first through hole 811, thereby further ensuring the accuracy of the light source measurement result.

[0130] Specifically, during the measurement process, the light source to be measured is placed on one side of the light inlet 911 of the integrating sphere 900. The incident light rays emitted by the light source to be measured enter the integrating sphere 900 through the light inlet 911, are reflected multiple times inside the integrating sphere 900, and then exit from the light outlet 912. Then, they sequentially pass through the first polarizing element 100, the second polarizing element 200, and the collimating lens 400 and enter the spectrometer 500 to complete the spectral measurement of the light source to be measured.

[0131] The present application also provides a light source measurement system 1000.

[0132] The light source measurement system 1000 provided by the present application includes a light source to be measured and a light source measurement device 10 conceived based on any of the above embodiments, and the light source to be measured can be measured by the light source measurement device 10.

[0133] According to the light source measurement system provided in this embodiment, by using the light source measurement device conceived according to the above embodiments, by setting two sets of polarizing films, namely the first polarizing element and the second polarizing element, the attenuation effects of the two sets of polarizing films on the light rays are superimposed, so that the light source measurement device has a large attenuation ability. The light intensity of the ultra-high brightness light source can be weakened to meet the measurement range of the spectrometer, and the measurement of the ultra-high brightness light source can be realized, expanding the use range of the light source measurement device. The second polarizing element is configured to be rotatable, and the second polarizing element has different attenuation abilities for incident light rays at different rotation angles. By adjusting the rotation angle of the second polarizing element, the light intensity of different light sources to be measured can be weakened to the light intensity required for measurement, making the light source measurement device of the present invention universal and further increasing the use range of the light source measurement device. The present utility model also detects the relative position of the second polarizing element through a position detection element, so that the driving motor can adjust the rotation angle of the second polarizing element according to the relative position of the second polarizing element, and can automatically adjust the rotation angle of the second polarizing element to realize the automation of light source measurement, which can not only improve the light source measurement efficiency, but also improve the accuracy and reliability of light source measurement.

[0134] Optionally, please refer to Figure 8 , Figure 8 which is a schematic structural diagram of the light source measurement system according to the embodiment of the present utility model. The light source measurement system 1000 may include a moving mechanism 20, and the moving mechanism 20 is used to convey the light source to be measured to be opposite to the light inlet 911 of the light source measurement device 10, so that the light rays emitted by the light source to be measured enter the light source measurement device 10.

[0135] Among them, the light source to be measured can include various types. The light source to be measured can be a single light-emitting light source, such as a single LED lamp bead, or the light source to be measured can also be a light bar, and a plurality of IED lamp beads are arranged on the light bar; the light source to be measured can also be a light board, such as a wafer board, and an LED lamp bead array is arranged on the wafer board.

[0136] In order to facilitate the measurement of the above-mentioned light sources to be measured of different types, in one embodiment, the moving mechanism 20 may include an X-axis moving module 21 and a Y-axis moving module 22.

[0137] Among them, the X-axis moving module 21 may be fixed to a bearing platform. The X-axis moving module 21 is provided with a mounting seat 810. The Y-axis moving module 22 is mounted on the X-axis moving module 21. The X-axis moving module 21 can drive the entire Y-axis moving module 22 to move along the X-axis direction; the Y-axis moving module 22 is provided with a mounting platform, and the light source to be measured can be placed on the mounting platform. The Y-axis moving module 22 is used to drive the mounting platform to move along the Y-axis direction to drive the light source to be measured to move along the Y-axis direction.

[0138] Thus, under the combined movement of the X-axis moving module 21 and the Y-axis moving module 22, the light source to be measured can be driven to move along the X-axis and / or Y-axis directions, which can meet the measurement requirements for different types of light sources to be measured.

[0139] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the knowledge scope of those of ordinary skill in the art to which the present invention pertains, various changes can also be made without departing from the purpose of the present invention.

Claims

1. A light source measuring device, characterized in that: include: a first polarizing element; A second polarizer is disposed on one side of the first polarizer and is located on the optical axis path of the first polarizer, and the second polarizer can rotate around an axis; A driving motor connected to the second polarizer, the driving motor is used to drive the second polarizer to rotate; and The position detection element is used to detect the relative position of the second polarizer, so that the driving motor drives and adjusts the rotation angle of the second polarizer according to the relative position of the second polarizer.

2. The light source measuring device according to claim 1, characterized in that: The light source measuring device also includes a supporting member, which is provided with a receiving groove to accommodate the second polarizing member, and the supporting member can be rotated to drive the second polarizing member to rotate; the supporting member and the position detection element are arranged relative to each other and spaced apart, and the supporting member includes a first surface facing the position detection element, and the first surface is provided with a marking pattern for detection and identification by the position detection element.

3. The light source measuring device according to claim 2, characterized in that: The position detection element is a photoelectric sensor; The marking pattern comprises: A first marking pattern extending from an outer edge of the first surface toward the rotation axis of the carrier in a strip shape; and A second marking pattern connected to two sides of the first marking pattern and arranged around the rotation axis of the carrier; Wherein, the reflectivity of the first marking pattern to light is greater than the reflectivity of the second marking pattern to light, or the reflectivity of the first marking pattern to light is less than the reflectivity of the second marking pattern to light.

4. The light source measuring device according to claim 3, characterized in that: The light source measuring device also includes a control system, which is electrically connected to the position detection element and the drive motor. When the position detection element recognizes the first marking pattern, the control system sets the current position of the drive motor as a zero position to control the drive motor to drive and adjust the rotation angle of the second polarizer according to the zero position.

5. The light source measuring device according to claim 3, characterized in that: The position of the first marking pattern relative to the carrier is configured such that when the position detection element recognizes the first marking pattern, the second polarizer can completely transmit the incident light passing through the second polarizer.

6. The light source measuring device according to any one of claims 2 to 5, characterized in that: The light source measuring device further comprises a transmission mechanism, which can be driven by the driving motor to rotate to drive the bearing member to rotate, and the transmission mechanism comprises: a worm connected to the output shaft of the drive motor; and The worm wheel part is connected to the outer periphery of the bearing component and meshes with the worm.

7. The light source measuring device according to any one of claims 1 to 5, characterized in that: The driving motor is a hollow shaft motor, the driving motor comprises a hollow shaft, and the second polarizer is arranged in the hollow shaft.

8. The light source measuring device according to any one of claims 1 to 5, characterized in that: The light source measuring device also includes: A mounting base, used for supporting the first polarizer, the second polarizer and the driving motor; a spectrometer connected to the mounting base and located on a side of the second polarizer facing away from the first polarizer; and A collimating lens is disposed between the second polarizer and the spectrometer, and one end of the collimating lens is connected to the spectrometer, and the other end of the collimating lens is opposite to the second polarizer.

9. The light source measuring device according to claim 8, characterized in that: The light source measuring device also includes: A light shield is connected to the mounting base and covers the mounting base to form a light shielding cavity, so as to cover the first polarizer, the second polarizer and the position detection element in the light shielding cavity. The light shield is also provided with a first through hole for the collimating lens to pass through, and the first through hole is sealed with the outer peripheral wall of the collimating lens.

10. The light source measuring device according to claim 9, characterized in that: The mounting seat is provided with a mounting hole penetrating the mounting seat along the thickness direction, and the first polarizer is arranged in the mounting hole; The light source measuring device also includes an integrating sphere, which is connected to the side of the mounting base away from the light shield, and includes a sphere, and two opposite ends of the sphere are respectively provided with a light inlet and a light outlet, the light outlet is coaxially arranged with the light inlet, and the light outlet is connected to the mounting hole.

11. A light source measurement system, characterized in that: The device comprises a light source to be measured and a light source measuring device according to any one of claims 1 to 10.

12. The light source measurement system according to claim 11, characterized in that: A light inlet is provided on one side of the light source measuring device; The light source measurement system comprises a moving mechanism, and the moving mechanism is used to transport the light source to be measured, so as to transport the light source to be measured to be opposite to the light entrance.

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