Apparatus and method for detecting the transmission of glass

Abstract

Provided is a device for detecting the light transmittance of glass, comprising: a fixing part for fixing the glass to be detected; the detection window can be used for detecting the glass to be detected; the light source is used for generating a first light beam to enable the first light beam to irradiate to-be-detected glass through the detection window; the motion control unit is used for generating a first motion control signal; the actuator is used for enabling the fixing part to move in the x direction and / or the y direction based on the first motion control signal so as to enable the first light beam to irradiate the current detection position on the glass, and the x direction and the y direction are perpendicular to each other and are respectively perpendicular to the first light beam; the light detector is used for detecting the second light beam penetrating through the current detection position on the glass; and a light transmittance detection unit for determining the light transmittance of the glass at the current detection position based on the first light beam and the detected second light beam. Therefore, the light transmittance at different positions can be conveniently detected, and a basis is provided for judging the uniformity of the light transmittance of the glass.

Description

Technical Field

[0001] The present invention relates to the field of optical detection, and in particular to the detection of light transmittance of glass. Background Art

[0002] Glass is widely used in our daily life. It is not only used in living facilities such as doors and windows, but also used as the material of light-emitting and / or light-incoming windows in many devices that require light transmission. As a light-transmitting material, the quality of the light-emitting and / or light-incoming glass windows directly affects the performance of the device.

[0003] At present, a spectrometer is usually used to detect the light transmittance of glass to measure the quality of glass. In a spectrometer, the light transmittance of glass can be detected for light in the full wavelength range, the detection spot size is generally less than 1 mm, and the size of the glass sample that can be detected is generally less than 10 cm*10 cm. Figure 1 FIG. 4 shows a scene of detecting the light transmittance of glass in a spectrometer. Figure 1 As shown, the glass G is clamped at a specific detection position for detection. Once the glass is clamped, a specific area on the glass G corresponding to the light spot area of ​​the spectrometer can be detected, and the glass G can be manually moved to detect other parts of the glass. In the spectrometer-based glass detection process, both light scattered by the glass and light that is basically directly transmitted through the glass are collected to detect the light transmittance of the glass. Summary of the invention

[0004] It is desirable to provide an improved device and method for detecting the light transmittance of glass, which facilitates the detection of the light transmittance at different positions on the glass and provides a basis for determining the uniformity of the light transmittance of the glass.

[0005] According to one aspect, a device for detecting the transmittance of glass is provided, comprising: a fixing component for fixing the glass to be detected; a detection window for enabling the glass to be detected through the detection window; a light source for generating a first light beam so that the first light beam illuminates the glass to be detected through the detection window; a motion control unit for generating a first motion control signal; an actuator for moving the fixing component relative to the light source along an x ​​direction and / or a y direction based on the first motion control signal so that the first light beam illuminates a current detection position on the glass to be detected, wherein the x direction and the y direction are perpendicular to each other and are respectively perpendicular to the first light beam emitted by the light source; a light detector for detecting a second light beam transmitted at the current detection position on the glass to be detected; and a transmittance detection unit for determining the transmittance of the glass to be detected at the current detection position based on the first light beam and the detected second light beam.

[0006] According to another aspect, a method for detecting the transmittance of glass is provided, comprising: based on a first motion control signal, causing a fixing component for fixing the glass to be detected to move relative to the light source along the x direction and / or the y direction so that a first light beam generated by the light source illuminates a current detection position on the glass to be detected, the x direction and the y direction being directions perpendicular to each other in the plane of the glass to be detected; detecting a second light beam transmitted at the current detection position on the glass to be detected; and determining the transmittance of the glass to be detected at the current detection position based on the first light beam and the detected second light beam.

[0007] According to still another aspect, a computer readable medium is provided, storing a computer program, wherein when the computer program is executed by a controller and / or a processor, the device according to the various embodiments of the present invention can execute the method according to the various embodiments of the present invention.

[0008] According to various embodiments of various aspects of the present invention, by including a motion control unit and an actuator, the actuator can move a fixing component for fixing the glass to be detected relative to a light source according to a motion control signal generated by the motion control unit, thereby moving the glass to be detected within a plane so that different positions on the glass are respectively used as detection positions to perform transmittance detection. In this way, different detection positions on the glass and corresponding transmittances can be conveniently recorded, providing a basis for determining the uniformity of the transmittance of the glass.

[0009] In one embodiment according to various aspects of the present invention, the device for detecting the light transmittance of glass further includes an integrating sphere disposed between the fixing component and the light detector, the light inlet of the integrating sphere being designed to receive the second light beam, which is a light beam substantially directly emitted after the first light beam passes through the current detection position of the glass to be detected, and the light detector detects the light beam at the light outlet of the integrating sphere. By receiving only the light substantially directly emitted after passing through the glass through the integrating sphere, this may adapt to the application scenarios of the glass (e.g., radar), thereby obtaining more accurate detection results for specific scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Embodiments are illustrated by way of example only and not by way of limitation in the figures of the accompanying drawings in which like reference numerals refer to similar elements.

[0011] Figure 1 The figure shows a scene of detecting the light transmittance of glass in a spectrometer;

[0012] Figure 2 The structure of a device for detecting light transmittance of glass according to an embodiment of the present invention is shown;

[0013] Figure 3 The structure of a device for detecting light transmittance of glass according to an embodiment of the present invention is shown;

[0014] Figure 4 The fixing parts of the device for detecting the light transmittance of glass according to one embodiment of the present invention are shown;

[0015] Figure 5 The structure of a device for detecting light transmittance of glass according to another embodiment of the present invention is shown;

[0016] Figure 6a and 6b The physical product of the device for detecting light transmittance of glass according to one embodiment of the present invention is shown from different angles respectively;

[0017] Figure 7 A flow chart of a method for detecting light transmittance of glass according to an embodiment of the present invention is shown;

[0018] Figure 8 A flow chart of a method for detecting light transmittance of glass according to an embodiment of the present invention is shown;

[0019] Fig. 9 The figure shows the test result of the transmittance of the glass to be tested according to one embodiment of the present invention.

[0020] Various aspects and features of various embodiments of the present invention are described with reference to the above drawings. The above drawings are only illustrative and not restrictive. In addition, not all parts of the device of the embodiment of the present invention are marked with reference numerals in the above drawings. Only relevant parts are marked in some drawings, which does not limit the parts to those shown in the drawings of the specification. DETAILED DESCRIPTION

[0021] In some scenarios, the uniformity of glass transmittance is an important indicator. For example, in an advanced driver assistance system (ADAS), a radar is set on a vehicle or on the side of a road to perform environmental perception. For example, due to the impact of small stones, the uniformity of the radar's glass window transmittance deteriorates over time, which is an important factor that deteriorates the maximum detection range of the radar.

[0022] In such Figure 1When a spectrometer is used to detect the transmittance of glass, once the glass is clamped, only a specific area on the glass G corresponding to the spot area of ​​the spectrometer (usually less than 1 mm) can be detected. If other parts of the glass need to be detected, the position of the glass needs to be manually reset. In the case where the uniformity of the transmittance of the glass needs to be detected, it is obviously inappropriate to use such a spectrometer for detection. On the one hand, it is troublesome to manually set the position of the glass repeatedly. On the other hand, the measurement position on the glass can only be roughly estimated each time, but cannot be accurately determined, which makes it difficult to accurately determine the uniformity of the transmittance of the glass at different detection positions. All of these aspects limit the use of current spectrometers to detect the uniformity of the transmittance of glass. Furthermore, the size of the glass sample detected by the spectrometer is generally less than 10cm*10cm. This makes it difficult to detect the uniformity of the transmittance of large-sized glass.

[0023] According to various embodiments of the present invention, by including a motion control unit and an actuator, the actuator can move a fixing component for fixing the glass to be detected according to a motion control signal generated by the motion control unit, thereby moving the glass to be detected within the plane so that different positions on the glass are respectively used as detection positions to perform transmittance detection, thereby realizing transmittance detection of different detection positions on the glass to be detected. In this way, different detection positions on the glass and the corresponding transmittance can be conveniently recorded, providing a basis for judging the uniformity of the transmittance of the glass.

[0024] Figure 2 FIG. 1 shows a structure of a device 10 for detecting light transmittance of glass according to an embodiment of the present invention, wherein the device 10 is displayed in the xz plane. Figure 2 As shown, the device 10 includes a fixing component 11 , a motion control unit 12 , an actuator 13 , a light source 14 , a light detector 15 and a light transmittance detection unit 16 .

[0025] The fixing component 11 is used to fix the glass G to be inspected. The motion control unit 12 is used to generate a first motion control signal. In response to the motion control signal, the actuator 13 causes the fixing component 11 to move along at least one of the x direction and the y direction perpendicular to each other. The x direction and the y direction are respectively perpendicular to the first light beam emitted by the light source 14 (e.g., Figure 2 ) is a parallel light beam emitted by the transmitter Tx. Figure 2 The x direction and the z direction are shown in the figure, respectively, and the z direction is parallel to the first light beam. The direction perpendicular to both the x direction and the z direction is the y direction.

[0026] When only one detection position needs to be detected, the fixed component is moved so that the detection position on the glass G is irradiated by the first light beam emitted (Tx) by the light source 14. When multiple detection positions need to be detected, the fixed component 11 is moved so that different detection positions on the glass G can be sequentially irradiated by the first light beam emitted by the light source 14.

[0027] The light source 14 may be any type of light source, and may be set to a specific type of light source according to the use scenario of the glass G. In one embodiment, the glass to be detected is used as a glass window of a radar, and thus, the light source 14 may be a laser light source.

[0028] In one example, the laser light source can be configured to emit a laser light beam with any wavelength in the range of 400 nanometers to 3 micrometers. For example, the laser light source is a wavelength-adjustable laser light source, and the user can adjust the wavelength of the light beam emitted by the laser light source according to the specific usage scenario of the glass to be detected. For a laser light beam with a wavelength of 905 nanometers or 1550 nanometers used in general radar equipment, the laser light source can be configured to emit a laser light beam with a wavelength of 905 nanometers or 1550 nanometers for detecting the light transmittance of the glass.

[0029] In another example, the laser light source can emit an expanded laser beam, wherein the spot diameter of the laser beam can be any size from 10 mm to 50 mm. For example, the laser light source is a collimated laser source. Generally, an expanded laser beam is used in radar equipment to detect point cloud data, wherein the spot diameter is generally not greater than 10 mm. Therefore, the laser light source is configured to emit an expanded laser beam to simulate its actual usage scenario.

[0030] It is also conceivable that the laser light source is both wavelength-tunable and capable of emitting an expanded laser beam. By setting the light source to emit the same beam as the light source in the actual use scenario of the glass to be tested, the situation of the glass in the actual application scenario can be better simulated, thereby providing more accurate test results for its specific use.

[0031] After the first light beam emitted by the light source 14 passes through the detection window and irradiates the current detection position on the glass to be detected, a part of the light beam is scattered (such as Figure 2 ), while a portion of the light beam is basically directed after passing through the glass G (as shown by the dashed arrow in the figure). Figure 2As shown by the solid arrow in the middle). After passing through the air gap A, the second light beam passing through the glass is received by the light detector 15, thereby detecting the second light beam passing through the glass. In one embodiment, the light detector 15 may include a photoelectric converter and an electrical measuring unit (not shown), the photoelectric converter converts the detected second light beam into an electrical signal, and the electrical measuring unit (such as a picoammeter) is used to measure the intensity of the electrical signal as the intensity of the second light beam. The transmittance detection unit 16 determines the transmittance of the glass G to be detected at the current detection position based on the first light beam emitted by the light source 14 and the detected second light beam. Specifically, the transmittance at the current detection position can be determined based on the intensity of the first light beam and the intensity of the second light beam. For example, the transmittance at the current detection position can be calculated by dividing the intensity of the second light beam at the current detection position by the intensity of the first light beam and then multiplying it by 100%.

[0032] In one embodiment, Figure 2 The device 10 shown for detecting the light transmittance of glass also includes a rotating fixture 17. The rotating fixture 17 is connected to the fixed component 11 and is configured to enable the fixed component 11 to rotate so that the glass G to be detected can be tilted relative to the light beam emitted by the light source 14, that is, the plane of the glass G is not perpendicular to the first light beam emitted by the light source 14, but is at a certain angle to the first light beam. In the case where the glass is used as a glass window of a radar, for a certain position on the glass, the laser beam is not always perpendicular to the position and directly incident, but may irradiate the position at a certain angle. By adjusting the tilt angle of the glass G about the z-axis using the rotating fixture 17, the use scenario of the glass G can be better simulated, thereby obtaining a more accurate light transmittance detection result for a specific scenario.

[0033] Although not shown, the rotating fixture 17 can also be controlled by the motion control unit 12 to set the tilt angle of the glass G about the z-axis. For example, the motion control unit 12 can generate an angle control signal according to the user's setting, and in response to the angle control signal, the rotating fixture 17 adjusts the tilt angle of the fixing component 11 about the z-axis, thereby achieving the desired tilt angle for the glass G.

[0034] Although the case where the fixed component 11 is moved along the x direction and / or the y direction by the motion control unit 12 and the actuator 13 is described, it is also conceivable that the actuator 13 can also move the fixed component along the z direction in response to the first control signal from the motion control unit 12. In this way, the distance between the glass and the light source 14 in the actual use scenario can be simulated, so as to obtain a more accurate detection result for a specific scenario.

[0035] Figure 3FIG. 1 shows a structure of a device 10 for detecting light transmittance of glass according to an embodiment of the present invention, wherein the device 10 is displayed in an xy plane. Figure 3 As shown, the fixing part 11 defines a large detection window W, and the detection window W is set to have a length or width greater than 10 cm, so that a larger area of ​​glass can be detected. The glass G to be detected is fixed by the fixing part 11, so that the light source ( Figure 3 The first light beam (not shown) generated by the detection window W passes through a position in the detection window W to detect the corresponding detection position on the glass G. Figure 3 , the current spot position S of the first light beam on the glass G, that is, the current detection position on the glass G, is shown. The first light beam irradiates the glass G at the current detection position and the second light beam irradiated through the glass G is detected by the light detector 15. The transmittance detection unit 16 can determine the transmittance at the current detection position based on the first light beam and the detected second light beam.

[0036] In addition, the device 10 also includes a hole 18 provided on the fixed component 11. The motion control unit 12 is capable of generating a second motion control signal; the actuator 13 moves the fixed component 11 along the x-axis and / or the y-axis in response to the second motion control signal so as to irradiate the first light beam generated by the light source through the hole 18. The light detector 15 detects the first light beam passing through the hole 18. The transmittance measuring unit 16 determines the corresponding transmittance of the glass G to be detected based on the first light beam thus detected and the second light beam detected at the current detection position (or multiple detection positions) on the glass. For example, the intensity of the second light beam detected at a detection position on the glass is divided by the intensity of the first light beam detected passing through the hole 18 and then multiplied by 100%, thereby obtaining the transmittance at the detection position on the glass G.

[0037] Figure 4 FIG. 1 shows a fixing part 11 of a device 10 for detecting light transmittance of glass according to an embodiment of the present invention. Figure 4 As shown, the fixing component 11 includes a frame shown in black, and the glass G to be detected is fixed on the frame, and the frame defines a large detection window W shown in gray in the figure. In the detection window W, the glass G has a length L_x along the x direction and a width L_y along the y direction. The glass G in the detection window can be divided into a detection area TA and a non-detection area NTA. The detection area and the non-detection area can be defined according to the actual use scenario of the glass G, and the area that the user is interested in is defined as the detection area TA. Although in Figure 4The non-detection area NTA is shown in the figure at a distance O_x and O_y from the frame edge of the fixing element 11 in the x and y directions, respectively. It is understood that this is not restrictive and the non-detection area can be defined arbitrarily. Figure 4 , a cavity 18 and a device reference point RP defined on the frame of the fixing element 11 are shown. The device reference point RP is used as a reference point for aligning the fixing element 11 with other components, or as a reference point for fixing a glass to be inspected on the fixing element.

[0038] exist Figure 4 Also shown is the light spot of the first light beam for detecting the detection area TA. When detecting a large area of ​​glass, the motion control unit can control the movement of the fixed component 11 so that the light spot of the first light beam moves within the detection area TA, thereby sequentially detecting multiple detection positions on the glass. Figure 4 Only three light spots are schematically shown, namely the first and second light spots S1_1, S1_2 in the first row and the first light spot S2_1 in the second row. Each light spot has a radius R, and there is overlap between adjacent light spots. For example, the overlap between adjacent light spots in the x direction is OL_x, and the overlap between adjacent light spots in the y direction is OL_y. The overlap between adjacent light spots can be represented by any type of numerical value, which can be a percentage or a maximum value of the overlapping part along the corresponding direction.

[0039] like Figure 4 Each parameter shown can be set by the user, for example, can be set through a user interface. These parameters include, but are not limited to: detection area TA, non-detection area NTA, overlap between adjacent light spots, radius of the light spot (which can be achieved by setting the light source), the number of detection positions along the x and y directions, the step size between adjacent detection positions along the x and y directions, the number of detections at each detection position, etc. Although the above parameters can be set by the user, this does not prevent the device from being pre-set accordingly, and does not allow the user to set them separately. In addition, in some embodiments, only some of the other parameters can be set by the user, and the other parameters can be pre-set or derived from some of the parameters set by the user. For example, the known detection area TA, the radius of the light spot, and the overlap between adjacent light spots can determine the number of detection positions along the x and y directions and / or the step size between adjacent detection positions. Although as Figure 4 The situation where the light spots formed by the first light beam at different detection positions overlap is shown. It is also conceivable that the light spots formed by the second light beam at different detection positions do not overlap, or overlap in only one direction of the x and y directions.

[0040] Figure 5FIG. 2 shows the structure of a device 20 for detecting light transmittance of glass according to another embodiment of the present invention. Figure 2 and 3 The same reference numerals are used for the same components of the illustrated embodiment. Figure 2 and 3 Unlike the embodiment shown, the device 20 further includes an integrating sphere 19 disposed between the fixing part 11 and the light detector 15. After the first light beam emitted from the light source 14 irradiates the detection position on the glass G fixed on the fixing part 11, a portion of the light beam is scattered (e.g., Figure 4 The other part of the light beam remains basically straight after passing through the detection position of the glass (as shown by the dotted arrow in Figure 4 (as indicated by the solid arrow in ). Figure 4 What is shown is a relatively ideal situation. After passing through the glass, the first light beam may be scattered and / or refracted, and there are relatively few light beams that remain completely direct. The term "basically direct" used here also covers a portion of light beams with smaller scattering and / or refraction angles, which can also be beneficial in actual usage scenarios.

[0041] The light inlet I of the integrating sphere 19 is designed to receive the portion of the light beam that remains substantially straight after the first light beam passes through the current detection position of the glass to be detected, while ignoring the scattered portion of the light beam. The portion of the light beam that remains substantially straight and incident on the integrating sphere 19 is incident on the light detector 15 through the light outlet O after multiple reflections, and is detected by the light detector 15.

[0042] In some application scenarios, it would be beneficial to detect only the portion of the light beam that remains substantially straight after passing through the glass. For example, in radar, usually only the portion of the light beam that remains substantially straight through the glass window of the radar device can be irradiated on the detection target and then reflected back to be detected by the radar. When detecting the light transmittance of the glass, only the intensity of the portion of the light beam that remains substantially straight after passing through the glass is detected, and the light transmittance of the glass is determined accordingly, so that a more accurate detection result can be obtained for the specific use scenario of the glass.

[0043] Although the reference Figure 5 The use of an integrating sphere to detect a substantially direct light beam is described, which is merely a preferred implementation, and it is also conceivable that the light detector is a planar detector that is configured to detect only a substantially direct light beam.

[0044] Figure 6a and 6b The physical product of the device for detecting the light transmittance of glass is shown from different angles. Figure 6a and 6bAs shown, the device includes an x-axis, a y-axis and a z-axis, wherein the transmittance detection of multiple detection positions on the glass G to be detected can be realized by moving the fixing component along the x-axis and / or the y-axis. By moving the fixing component along the z-axis, the distance between the glass G to be detected and the light source in the actual use scenario can be simulated.

[0045] like Figure 6a and 6b As shown, the control, processing and / or interaction functions with the user in the device can be implemented by the computer CS. However, this is not restrictive, and a separate device may also have a component with processing / control capabilities and / or an interaction interface with the user in the device.

[0046] Although the reference Figure 2 -6 describes the structure and function of the device according to an embodiment of the present invention, which is not restrictive. One or more of the functions may be omitted according to different embodiments, or some of the functions may be combined to achieve corresponding technical effects.

[0047] In summary, according to various embodiments of the present invention, by enabling the glass to be inspected to be moved relative to the light source and the light detector, transmittance detection can be performed on multiple detection positions on the glass, and the corresponding positions can be recorded, thereby facilitating the determination of the uniformity of the transmittance of the glass.

[0048] In a specific example, the motion control unit 12 generates a first motion control signal based on a predetermined detection scheme (including at least one of the parameters set as described above) to enable the actuator 13 to move the fixed component 11 along the x direction and / or the y direction, so that the first light beam emitted by the light source sequentially irradiates multiple detection positions on the glass G to be detected; the light detector 15 detects multiple second light beams passing through the corresponding detection positions in the multiple detection positions on the glass to be detected; the transmittance measurement unit 16 determines the transmittance at the corresponding detection position in the multiple detection positions on the glass to be detected based on the first light beam and the detected second light beams. Although not shown, the device for detecting the transmittance of glass may also include an output unit or a processing unit. The output unit is used to output multiple detection positions on the glass to be detected and the transmittance determined for the corresponding detection positions therein, and output the multiple detection positions and the corresponding transmittance to the user, so that the user can view and determine the uniformity of the glass. The processing unit is used to determine data representing the uniformity of the transmittance of the glass to be detected based on the transmittance at the multiple detection positions on the glass to be detected. After determining the data, the output unit can output the determined data for the user to view.

[0049] In addition, in some embodiments, a detection window with a length or width greater than 10 cm can be obtained to support the detection of large-sized glass. In other embodiments, the glass to be detected can be tilted to better simulate the actual use scenario of the glass. In some other embodiments, the size of the light spot can be as high as 10 mm, so it is possible to simulate the use scenario of glass in the radar and obtain targeted detection results. In some other embodiments, the light detector can be set to detect only the second light beam that is basically straight after the first light beam passes through the current detection position of the glass to be detected, which is in line with the use scenario of glass in the radar and can obtain targeted detection results.

[0050] Furthermore, in some embodiments, the light source in the device only emits a first light beam of a single wavelength, and the wavelength of the emitted light beam is adjustable, which makes it possible to select the wavelength of the detection light beam for a specific scene and saves detection time compared to full-wavelength detection.

[0051] Figure 7 FIG. 1 is a flow chart of a method 100 for detecting light transmittance of glass according to an embodiment of the present invention. Figure 7 The method 100 shown includes at least two parts: initialization (steps 102-108) and measurement (steps 110-116).

[0052] During the initialization process, at step 102, the actuator 13 moves the fixed component 11 along the x direction and / or the y direction based on the second control signal from the motion control unit 12. In one embodiment, the second control signal may include a signal indicating the position of the hole 18, such as the x-coordinate position and the y-coordinate position of the hole 18. At step 104, it is determined whether the fixed component 11 has moved to a position where the first light beam emitted by the light source 14 can illuminate the hole 18 set on the fixed component 11. If it is determined at step 104 that the fixed component 11 has not been moved to a position where the first light beam emitted by the light source can illuminate through the hole 18 ( Figure 7 If the fixing member 11 has been moved to a position where the first light beam can irradiate through the cavity 18 ( Figure 7In step 106, if "Y" is selected in the figure, the light source 14 is turned on to emit the first light beam. In one embodiment, the light source 14 can be made to continuously emit the light beam for at least a predetermined period of time, such as 15 minutes, in step 106, so as to obtain a stable first light beam. Next, in step 108, the light detector 15 detects the first light beam emitted by the light source 14 and passing through the cavity 18, and in particular detects the intensity of the first light beam. The detection value of the first light beam passing through the cavity 18 can be used as a basis for determining the transmittance of each detection position on the glass to be detected. Therefore, the detection value of the first light beam passing through the cavity 18 needs to be recorded and stored for subsequent use.

[0053] After the initialization process including steps 102-108, at step 110, the actuator 13 moves the fixed component 11 along the x-direction and / or the y-direction based on the first control signal from the motion control unit 12. In one embodiment, the first control signal may include a signal indicating the current detection position, such as the x-coordinate position and the y-coordinate position of the current detection position, or the step size of the fixed component 11 required to move along the x-direction and / or the y-direction. At step 112, it is determined whether the fixed component 11 is moved to the current detection position in accordance with the first control signal so that the first light beam emitted by the light source 14 can illuminate the glass set on the fixed component 11. If it is determined at step 112 that the fixed component 11 has not been moved to the current detection position ( Figure 7 If the first light beam is "N" in the middle), the process returns to step 110 to continue moving the fixing member 11. If it is determined at step 112 that the fixing member 11 has been moved to the current detection position ( Figure 7 In step 114, the light detector 15 detects the second light beam after the first light beam emitted by the light source 14 passes through the current detection position on the glass to be detected, and in particular detects the intensity of the second light beam, and records the current detection position. In one embodiment, the light detector 15 can detect the second light beam after the first light beam irradiates the current detection position of the glass a predetermined number of times, and record the detection results of the second light beam for the predetermined number of times.

[0054] After the detection of the second light beam at the current detection position has been completed, the light transmittance at the current detection position on the glass G can be determined based on the detection value of the first light beam recorded and stored at step 108 and the detection result of the second light beam at the current detection position at step 116. In the case where the detection results of the second light beam are recorded for a predetermined number of times (more than once) at the current detection position in step 114, the detection results of the second light beam for a plurality of times can be averaged first, and then the light transmittance at the current detection position can be calculated by dividing the average detection result of the second light beam by the detection value of the first light beam and multiplying by 100%.

[0055] The above reference Figure 7 A method for detecting the light transmittance at a single detection position on glass using an apparatus for detecting the light transmittance of glass according to various embodiments of the present invention is described. One or more steps in the above method may be combined / omitted / changed to obtain different effects, and it is not excluded to add new steps in the above method to achieve its corresponding effects.

[0056] For example, in step 110, based on the first motion control signal, the fixing component 11 can be moved along the x direction and / or the y direction to a position where the first light beam generated by the light source 14 illuminates the current detection position on the glass G to be detected, without the need for the judgment step in step 112.

[0057] For example, the initialization process of steps 102 - 108 can be omitted, and instead, the transmittance can be directly calculated using the intensity of the first light beam emitted by the light source 14 .

[0058] For another example, when the device for detecting the transmittance of glass includes an integrating sphere, the above steps 108 and 114 can respectively allow the first light beam or the second light beam to enter the light entrance of the integrating sphere. The light entrance of the integrating sphere can be designed to only receive a light beam that is basically directly emitted after passing through a hole or glass, and then the light detector 15 detects the light beam at the light exit of the integrating sphere.

[0059] In addition, the apparatus for detecting light transmittance of glass according to various embodiments of the present invention also supports detecting light transmittance at multiple detection positions on the glass, thereby facilitating determination of the uniformity of light transmittance at multiple detection positions on the glass.

[0060] Specifically, in the case of detecting light transmission at multiple detection positions on the glass, the above reference Figure 7The method described is different only in that the fixed component can be sequentially moved along the x-direction and / or the y-direction based on the first motion control signal, so that the first light beam emitted by the light source sequentially irradiates multiple detection positions on the glass to be detected; and then the detection at steps 114 and 116 is performed for each detection position. That is, multiple second light beams transmitted at corresponding detection positions among the multiple detection positions on the glass are detected, and the transmittances at the multiple detection positions on the glass are respectively determined based on the first light beam and the detected multiple second light beams.

[0061] Figure 8 FIG. 2 shows a flow chart of a method 200 for detecting light transmittance of glass according to an embodiment of the present invention. The method 200 supports light transmittance detection at multiple detection positions on the glass. Figure 7 The same steps as those in the method 100 are denoted by the same reference numerals in the method 200. Figure 7 The difference of the method 100 shown is that according to the method 200, after the light transmittance at the current detection position is detected at step 116, it can be determined in step 118 whether the fixed component 11 needs to be moved to the next detection position. For example, the determination can be made based on the current detection position and a predetermined detection scheme. In one embodiment, the predetermined detection scheme includes a predetermined number of detection positions to be detected and a predetermined moving step length between adjacent detection positions. The predetermined number of detection positions to be detected can also be represented by the number of predetermined moving steps by which the fixed component is to be moved. In this embodiment, it can be determined whether the detection of the predetermined number of detection positions is achieved after the detection of the current detection position. If not ( Figure 8 If the predetermined number of detection positions have been detected ( Figure 8 If "Y" is displayed in the figure, the process proceeds to step 120 to output and / or send each detection position on the glass and its corresponding transmittance detection results. It is also expected that data representing the uniformity of the glass can be determined based on each detection position and its corresponding transmittance detection results, and the data can be output to the user. Fig. 9 FIG. 2 shows the test result of the transmittance of the glass to be tested according to an embodiment of the present invention. Fig. 9 As shown, different dots are used to indicate different detection positions on the glass G corresponding to different light spots, and the transmittance detection result at each detection position is represented by its different grayscale. Thus, it is convenient for users to intuitively observe whether the transmittance of the glass G is uniform.

[0062] Although the above reference Figure 8 It is shown that step 118 is performed after step 116 of determining the transmittance of the current detection position. It is also conceivable that step 116 and step 118 are performed in parallel, that is, after the second light beam has been detected a predetermined number of times at step 114, steps 116 and 118 are performed in parallel to shorten the detection time.

[0063] References Figure 2-9 Various embodiments of the method and device of the present invention are described, and these embodiments can be combined with each other to obtain different effects without being limited by the subject type. Furthermore, the various units / steps / processes mentioned above are not restrictive, and the functions of the various units / steps / processes mentioned above can be merged / combined / changed / modified to obtain corresponding effects. Although the above embodiments are described with reference to causing the actuator to move the fixed component, this is also not restrictive. Any movement method that can cause the first light beam emitted by the light source to move on the glass surface to be detected should be covered by the present invention. In other words, as long as the fixed component used to fix the glass is moved relative to the light source. This also covers the situation where the light source is moved to produce the above-mentioned relative movement.

[0064] The functions of the motion control unit and the transmittance detection unit of the method and device of the present invention can be implemented by software or corresponding hardware, or by means of any type of controller and / or processor to implement the functions of the above-mentioned units, for example, the processor can read the computer program in the memory and run these computer programs to implement the functions of the above-mentioned units. In one embodiment, the above-mentioned device of the present invention can also be implemented by a memory and a processor.

[0065] It is understood that the methods of various embodiments of the present disclosure can be implemented with the aid of computer programs / software. These software can be loaded into the working memory of a processor and used to execute the methods according to various embodiments of the present disclosure when running.

[0066] Exemplary embodiments of the present disclosure cover both creating / using the computer program / software of the present disclosure from the outset and converting an existing program / software to use the computer program / software of the present disclosure by means of an update.

[0067] According to another embodiment of the present disclosure, a computer program product is provided, such as a machine (e.g., computer) readable medium, such as a CD-ROM, including a computer program code, which, when executed, causes a computer or a processor to perform a method according to each embodiment of the present disclosure. The machine readable medium is, for example, an optical storage medium or a solid-state medium supplied with or as part of other hardware.

[0068] The above describes specific embodiments of the present disclosure. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0069] The present disclosure is described above with reference to specific embodiments. It should be understood by those skilled in the art that the technical solution of the present disclosure can be implemented in various ways without departing from the spirit and basic features of the present disclosure. The specific embodiments are merely illustrative and not restrictive. In addition, these embodiments can be arbitrarily combined to achieve the purpose of the present disclosure. The scope of protection of the present disclosure is defined by the attached claims.

[0070] The word "comprising" in the specification and claims does not exclude the existence of other elements or steps. The expressions "first", "second" and the order of the steps shown in the figures do not limit their order or quantity. The functions of the various elements described in the specification or recorded in the claims can also be split or combined and implemented by corresponding multiple elements or a single element.

Claims

1. A device for detecting light transmittance of glass, comprising: A fixing component, which is used to fix the glass to be inspected; A detection window, which is used to enable the glass to be detected to be detected therethrough; A light source, used for generating a first light beam so that the first light beam illuminates the glass to be inspected through the inspection window; A motion control unit, configured to generate a first motion control signal; an actuator, configured to move the fixed component relative to the light source along an x ​​direction and / or a y direction based on the first motion control signal so that the first light beam irradiates a current detection position on the glass to be detected, wherein the x direction and the y direction are perpendicular to each other and are respectively perpendicular to the first light beam emitted by the light source; a light detector, which is used to detect a second light beam transmitted through the current detection position on the glass to be detected; and A light transmittance detection unit is used to determine the light transmittance of the glass to be detected at the current detection position based on the first light beam and the detected second light beam.

2. The device according to claim 1, further comprising a cavity provided on the fixing member, wherein: The motion control unit generates a second motion control signal; the actuator moves the fixed component along the x-direction and / or the y-direction relative to the light source based on the second motion control signal so as to allow the first light beam to irradiate through the hole; the light detector detects the first light beam passing through the hole; and the transmittance detection unit determines the transmittance of the glass to be detected at the current detection position based on the first light beam detected passing through the hole and the second light beam detected.

3. The device according to claim 1 further includes a rotating fixture, which is connected to the fixed component and is configured to enable the fixed component to rotate so that the glass to be inspected can be tilted about the z direction, wherein the z direction is perpendicular to the x direction and the y direction and parallel to the first light beam.

4. The device according to claim 1 further includes an integrating sphere arranged between the fixed component and the light detector, and the light inlet of the integrating sphere is designed to receive the following second light beam: the second light beam is a light beam that is basically directly emitted after the first light beam passes through the current detection position of the glass to be detected, and the light detector detects the second light beam emitted through the light outlet of the integrating sphere.

5. The device according to claim 1, wherein: The light source is a laser light source having at least one of the following functions: The laser light source can be configured to emit a laser light beam having any wavelength in the range of 400 nanometers to 3 micrometers; and The laser light source is capable of emitting an expanded laser beam, wherein a spot diameter of the laser beam is between 2 mm and 50 mm.

6. The device according to claim 1, wherein: The actuator is further capable of moving the fixed component relative to the light source along a z-direction, which is perpendicular to the x-direction and the y-direction and parallel to the first light beam.

7. The device according to claim 1, wherein: The motion control unit generates a first motion control signal based on a predetermined detection scheme to enable the actuator to move the fixed component relative to the light source along the x direction and / or the y direction, so that the first light beam sequentially irradiates a plurality of detection positions on the glass to be detected; The light detector detects a plurality of second light beams transmitted through corresponding detection positions among the plurality of detection positions on the glass to be detected; and The light transmittance detection unit determines light transmittances at the plurality of detection positions on the glass to be detected based on the first light beam and the plurality of detected second light beams.

8. The device according to claim 7, further comprising: an output unit, configured to output the plurality of detection positions on the glass to be detected and light transmittances at corresponding detection positions among the plurality of detection positions; or A processing unit is used to determine data representing uniformity of light transmittance of the glass to be inspected based on the light transmittances at the plurality of inspection positions on the glass to be inspected.

9. The device according to claim 7, wherein: The predetermined detection scheme includes at least one parameter among the following: a detection area on the glass to be detected, a non-detection area on the glass to be detected, an overlap between adjacent light spots formed by the first light beam at adjacent detection positions on the glass to be detected, a radius of the light spot formed by the first light beam on the glass to be detected, the number of detection positions along the x-direction and the y-direction, a step size between adjacent detection positions along the x-direction and the y-direction, and the number of detections at each detection position.

10. The device according to claim 1, wherein: The length or width of the detection window is greater than 10 cm.

11. A method for detecting light transmittance of glass, comprising: Based on the first motion control signal, a fixing component for fixing the glass to be inspected moves relative to the light source along the x direction and / or the y direction so that the first light beam generated by the light source irradiates a current inspection position on the glass to be inspected, wherein the x direction and the y direction are directions perpendicular to each other in the plane of the glass to be inspected; Detecting a second light beam transmitted through the current detection position on the glass to be detected; and The light transmittance of the glass to be inspected at the current inspection position is determined based on the first light beam and the detected second light beam.

12. The method according to claim 11, further comprising: Based on a second motion control signal, the fixed component moves relative to the light source along the x-direction and / or the y-direction so that the first light beam is irradiated through a hole provided on the fixed component; detecting the first light beam passing through the cavity; and The light transmittance of the glass to be inspected at the current inspection position is determined based on the detected first light beam and the detected second light beam.

13. The method according to claim 11, further comprising: Allowing the second light beam to enter a light entrance port of an integrating sphere disposed between the fixing member and the light detector, the second light beam being a light beam that is substantially directly emitted after the first light beam passes through the current detection position of the glass to be detected; and The second light beam is detected at a light outlet of the integrating sphere.

14. The method according to any one of claims 11 to 13, further comprising: generating the first motion control signal based on a predetermined detection scheme; Based on the first motion control signal, the fixed component moves relative to the light source along the x direction and / or the y direction, so that the first light beam sequentially irradiates a plurality of detection positions on the glass to be detected; detecting a plurality of second light beams transmitted through corresponding detection positions among the plurality of detection positions on the glass to be detected; and The light transmittances at the plurality of detection positions on the glass to be detected are determined based on the first light beam and the plurality of detected second light beams.

15. A computer-readable medium storing a computer program, wherein when the computer program is executed by a controller and / or a processor, the computer program enables the device for detecting the transmittance of glass according to any one of claims 1 to 10 to perform the method according to any one of claims 11 to 14.

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