Light box and performance detection system of optical sensor

Abstract

The invention relates to a light box and a performance detection system of an optical sensor. The light box comprises a box body, a light source module and an electrical module, the box body is provided with a mounting cavity and a mounting position which is positioned in the mounting cavity and is used for mounting an optical sensor; the light source module is arranged in the mounting cavity and is used for emitting light to the mounting position; and the electrical module is arranged in the mounting cavity, is electrically connected with the light source module to supply power to the light source module, and is also used for adjusting the power supply voltage of the light source module, calculating the optical power of the light source module based on the power supply voltage and sending a calculation result. According to the light box, the light power of ultraviolet light emitted to the solar-blind ultraviolet sensor can be adjusted to a reasonable value by adjusting the power supply voltage of the light source module, so that the light current generated by the solar-blind ultraviolet sensor is not saturated, the light current and the responsivity of the sensor can be accurately determined, the performance of the sensor can be conveniently judged, and the reliability of the sensor is improved. And the test and research of related sensor and material performance can be promoted in the next step.

Description

Technical Field

[0001] The present application relates to the technical field of optical sensor performance detection, and in particular to a light box and an optical sensor performance detection system. Background Art

[0002] Solar Blind Ultraviolet (SBUV) detection technology is widely used and has attracted much attention from researchers. Sunlight in the SBUV (200nm~280nm) band is almost completely absorbed when passing through the atmosphere, so detecting ultraviolet light in this band has the advantage of low background noise interference and is widely used in flame detection, missile tracking, space communications and ozone hole monitoring.

[0003] At present, in order to detect the performance of solar-blind ultraviolet sensors (also known as "solar-blind ultraviolet detectors"), ultraviolet light is usually directed to the sensor, and the photocurrent and responsivity are determined based on the signal output by the sensor. Then, the performance of the sensor is judged by the size of the photocurrent and responsivity.

[0004] However, in traditional detection methods, high-power ultraviolet light is often directed to the sensor, which causes the photocurrent generated by the sensor to reach saturation. It is impossible to accurately determine the actual photocurrent that the sensor can generate, and it is also impossible to accurately calculate the sensor's responsiveness, which is not conducive to judging the sensor's performance, and thus limits the testing and research of related sensors and material performance. Summary of the invention

[0005] Based on this, it is necessary to provide a performance detection system for a light box and an optical sensor to address the above technical issues.

[0006] A light box, characterized by comprising:

[0007] A box body having a mounting cavity and a mounting position located in the mounting cavity and used for mounting the optical sensor;

[0008] a light source module, disposed in the mounting cavity and configured to emit light toward the mounting position; and

[0009] The electrical module is arranged in the installation cavity and is electrically connected to the light source module to supply power to the light source module. The electrical module is also used to adjust the power supply voltage of the light source module, calculate the optical power of the light source module based on the power supply voltage and send the calculation result.

[0010] In one of the embodiments, the box body further has a first opening communicating with the installation cavity;

[0011] The light box further includes a display module, which is electrically connected to the electrical module and exposed at the first opening to display the calculation result.

[0012] In one embodiment, the box body comprises an upper box body, an intermediate layer and a lower box body, the top of the upper box body has the first opening, the bottom of the upper box body has a first opening, the top of the lower box body has a second opening, the bottom of the lower box body is provided with the mounting position, and the intermediate layer covers between the first opening and the second opening;

[0013] The light source module is arranged on the lower surface of the middle layer, and the electrical module and the display module are arranged on the upper surface of the middle layer.

[0014] In one embodiment, the middle portion of the upper surface of the intermediate layer is used to install the electrical module and the display module, and the middle portion of the upper surface of the intermediate layer protrudes from the edge of the upper surface of the intermediate layer toward the top of the upper box body and is engaged in the first opening; and / or,

[0015] The middle portion of the lower surface of the middle layer is used to install the light source module, and the middle portion of the lower surface of the middle layer protrudes toward the bottom of the lower box body beyond the edge of the lower surface of the middle layer and is engaged in the second opening.

[0016] In one embodiment, the light source module includes a base, a lamp bead and a focusing lens;

[0017] The base is arranged in the box and is used to install the lamp bead, the lamp bead is electrically connected to the electrical module, and the focusing lens is arranged below the lamp bead and is used to direct the light emitted by the lamp bead to the installation position.

[0018] In one of the embodiments, the light source module further includes a heat sink, and the heat sink is disposed on a side of the base facing away from the lamp bead.

[0019] In one of the embodiments, the box body further has a second opening communicating with the installation cavity;

[0020] The electrical module has a resistor for adjusting the magnitude of the supply voltage, wherein the resistor has an adjustment portion, the adjustment portion is exposed at the second opening and is movable to adjust the magnitude of the supply voltage.

[0021] In one embodiment, the resistor is a knob-type resistor.

[0022] In one of the embodiments, the light box further comprises an optical power meter, which is detachably arranged at the installation position and is used to measure the optical power of the light source module under different power supply voltages;

[0023] The electrical module is also used to calibrate the relationship between the optical power and the power supply voltage of the light source module based on the measurement results of the optical power meter, and then determine the optical power irradiated on the optical sensor by the light source module under different power supply voltages based on the relationship.

[0024] A performance detection system for an optical sensor, comprising a detection device and a light box as described in any one of the above items;

[0025] The installation position of the light box is used to install an optical sensor to emit light with a preset optical power to the optical sensor;

[0026] The detection device is located outside the light box, and is also used to be electrically connected to the optical sensor and determine the photocurrent and responsivity of the optical sensor based on the output result of the optical sensor.

[0027] The above-mentioned light box and optical sensor performance detection system, by arranging an electrical module in the box, can adjust the power of ultraviolet light emitted to the day-blind ultraviolet sensor to a reasonable value by adjusting the power supply voltage of the light source module, so that the photocurrent generated by the day-blind ultraviolet sensor does not reach saturation, and the photocurrent and responsiveness of the sensor can be accurately determined. The electrical module can also output the optical power of the light source module, so that the experimenter can know the photocurrent and responsiveness of the day-blind ultraviolet sensor under the optical power, which is convenient for judging the performance of the sensor and conducive to the next step of promoting the testing and research of related sensors and material performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG. 1 is an exploded schematic diagram of a light box provided in an embodiment of the present application.

[0029] FIG. 2 is a schematic structural diagram of the base of the lower box body of the light box provided in FIG. 1 .

[0030] FIG. 3 is a schematic structural diagram of a light source module of the light box provided in FIG. 1 .

[0031] The reference numerals in the accompanying drawings are described as follows:

[0032] 10. Light box; 100. Box body; 100a. First opening; 100b. Second opening; 110. Upper box body; 111. First box body; 112. Top cover; 120. Middle layer; 130. Lower box body; 131. Second box body; 132. Base; 132a. Groove; 132b. Wiring trough; 200. Light source module; 210. Base; 220. Lamp beads; 230. Heat sink; 300. Electrical module; 310. Resistor; 311. Adjustment unit; 400. Display module. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0034] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0035] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0037] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0039] At present, in order to detect the performance of day-blind ultraviolet sensors, ultraviolet light is usually directed to the sensor. The photocurrent can be determined based on the signal output by the sensor, and the sensor's responsivity can be calculated according to the following formula: Responsivity = photocurrent / (device effective sensing area × ultraviolet light power). Afterwards, the performance of the sensor can be judged by the size of the photocurrent and the responsivity.

[0040] However, the optical power of existing ultraviolet light with known optical power is generally very large. In traditional detection methods, ultraviolet light with known optical power is often directed to the sensor, which causes the photocurrent generated by the sensor to reach saturation. It is impossible to accurately determine the actual photocurrent that the sensor can generate, and it is also impossible to accurately calculate the sensor's responsiveness, which is not conducive to judging the performance of the sensor, and thus limits the testing and research of related sensors and material performance.

[0041] In this regard, an embodiment of the present application provides a light box, which can be used for performance testing of solar-blind ultraviolet sensors. Of course, it can also be used for performance testing of other types of optical sensors (such as infrared sensors).

[0042] As shown in Figure 1, the light box 10 includes a box body 100, a light source module 200 and an electrical module 300. The box body 100 serves as a bearing component of the entire light box 10, and is mainly used to install the light source module 200 and the electrical module 300, wherein the box body 100 has an installation cavity and an installation position located in the installation cavity and used to install an optical sensor. It is understandable that when used for performance testing of day-blind ultraviolet sensors, the installation position is used to install day-blind ultraviolet sensors; and when used for performance testing of infrared sensors, the installation position is used to install infrared sensors. The structure of the light box 10 is described below using a day-blind ultraviolet sensor as an example. It should be noted that the "upper" and "lower" directions in the full text are all based on the "upper" and "lower" directions shown in Figure 1.

[0043] The light source module 200 is arranged in the installation and is used to emit light toward the installation position. When used for the performance detection of the solar-blind ultraviolet sensor, the light source module 200 is used to emit solar-blind ultraviolet light to the solar-blind ultraviolet sensor at the installation position.

[0044] The electrical module 300 is arranged in the installation cavity, and the electrical module 300 is electrically connected to the light source module 200 to supply power to the light source module 200. The electrical module 300 is also used to adjust the power supply voltage of the light source module 200 and calculate the optical power of the light source module 200 based on the power supply voltage and send the calculation result. The electrical module 300 can adjust the optical power of the ultraviolet light emitted to the solar-blind ultraviolet sensor to a reasonable value by adjusting the power supply voltage of the light source module 200, so that the photocurrent generated by the solar-blind ultraviolet sensor does not reach saturation, and then the photocurrent of the solar-blind ultraviolet sensor can be determined according to the result output by the solar-blind ultraviolet sensor, and the responsivity of the solar-blind ultraviolet sensor can be accurately calculated in combination with the optical power of the ultraviolet light; and the electrical module 300 can also output the optical power of the light source module 200, so that the experimenter can know the photocurrent and responsivity of the solar-blind ultraviolet sensor under the optical power, which is convenient for judging the performance of the sensor and conducive to the next step of promoting the testing and research of related sensors and material performance.

[0045] It can be seen that the light box 10, by setting the electrical module 300 in the box body 100, can adjust the power of the ultraviolet light emitted to the day-blind ultraviolet sensor to a reasonable value by adjusting the power supply voltage of the light source module 200, so that the photocurrent generated by the day-blind ultraviolet sensor does not reach saturation, and the photocurrent and responsiveness of the sensor can be accurately determined. The electrical module 300 can also output the optical power of the light source module 200, so that the experimenter can know the photocurrent and responsiveness of the day-blind ultraviolet sensor under the optical power, which is convenient for judging the performance of the sensor and conducive to the next step of promoting the testing and research of related sensors and material performance.

[0046] As shown in FIG. 1 , in some embodiments, the housing 100 further has a first opening 100a communicating with the mounting cavity; the light box 10 further includes a display module 400, which is electrically connected to the electrical module 300 and exposed to the first opening 100a to display the calculation result. The display module 400 can display the optical power of the ultraviolet light irradiated to the sensor by the light source module 200, so that the experimenter can monitor the optical power of the ultraviolet light in real time, so that the optical power of the ultraviolet light can be adjusted to a preset value. Of course, in some other embodiments, the electrical module 300 can be used to transmit the calculation result to a terminal device, such as a mobile phone, a computer, etc., and the experimenter can obtain the optical power of the ultraviolet light by checking the terminal device.

[0047] Optionally, the display module 400 may be an OLED (Organic Light Emitting Diode) display screen.

[0048] Optionally, as shown in FIG. 1 , the first opening 100 a is disposed at the top of the box body 100 , and the mounting position is disposed at the bottom of the box body 100 .

[0049] In one embodiment, as shown in FIG. 1 , the box 100 includes an upper box 110, an intermediate layer 120, and a lower box 130. The top of the upper box 110 has a first opening 100a, the bottom of the upper box 110 has a first opening, the top of the lower box 130 has a second opening, the bottom of the lower box 130 has a mounting position, and the intermediate layer 120 covers between the first opening and the second opening; the light source module 200 is arranged on the lower surface of the intermediate layer 120, and the electrical module 300 and the display module 400 are arranged on the upper surface of the intermediate layer 120. The box 100 of this structure facilitates the installation of the light source module 200, the electrical module 300, and the display module 400, which can improve the integration of the light box 10 and reduce the volume of the light box 10.

[0050] Optionally, the middle of the upper surface of the middle layer 120 is used to install the electrical module 300 and the display module 400, and the middle of the upper surface of the middle layer 120 protrudes from the edge of the upper surface of the middle layer 120 toward the top of the upper box 110 and is engaged in the first opening. The middle layer 120 of this structure is convenient for installing the electrical module 300 and the display module 400, and also for installing the middle layer 120 and the upper box 110.

[0051] Optionally, the middle of the lower surface of the middle layer 120 is used to install the light source module 200, and the middle of the lower surface of the middle layer 120 protrudes from the edge of the lower surface of the middle layer 120 toward the bottom of the lower box 130 and is engaged in the second opening. The middle layer 120 of this structure is convenient for installing the light source module 200 and for installing the middle layer 120 and the lower box 130. Optionally, the middle of the middle layer 120 has a through hole, and the upper end of the light source module 200 extends into the through hole to be electrically connected to the electrical module 300.

[0052] Optionally, as shown in FIG1 , the upper box 110 includes a first box body 111 and a top cover 112. The bottom of the first box body 111 has a first opening, the top of the first box body 111 has a third opening, and the top cover 112 covers the third opening and is provided with a first opening 100a. Optionally, the middle portion of the lower surface of the top cover 112 protrudes from the edge of the lower surface of the top cover 112 toward the lower box 130 and is engaged in the third opening.

[0053] Optionally, as shown in FIG1 , the lower box 130 includes a second box body 131 and a base 132, the top of the second box body 131 has a second opening, the bottom of the first box body 111 has a fourth opening, and the base 132 covers the fourth opening and is provided with a mounting position. Optionally, a mounting position is provided in the middle of the upper surface of the base 132, and the edge of the upper surface of the base 132 protrudes toward the upper box 110 and is engaged in the fourth opening. Optionally, as shown in FIG2 , a groove 132a and a wiring groove 132b are provided on the upper surface of the base 132; the groove 132a can be used as a mounting position for installing an optical sensor; the wiring groove 132b is connected to the groove 132a and runs through the outer peripheral surface of the base 132, and is used for the passage of the wires of the optical sensor.

[0054] As shown in FIG3 , in some embodiments of the present application, the light source module 200 includes a base 210, a lamp bead 220 and a focusing lens (not shown in the drawings); the base 210 is disposed in the housing 100 and is used to install the lamp bead 220, the lamp bead 220 is electrically connected to the electrical module 300, and the focusing lens is disposed below the lamp bead 220 and is used to direct the light emitted by the lamp bead 220 to the installation position. The light source module 200 of this structure can gather the generated light and direct it to the optical sensor, which is convenient for detecting the performance of the optical sensor.

[0055] Optionally, the focusing lens may be fixed on the lower surface of the middle layer 120 by a bracket.

[0056] Further, as shown in FIG3 , the light source module 200 further includes a heat sink 230, which is disposed on a side of the base 210 facing away from the lamp bead 220. The heat sink 230 can dissipate heat from the lamp bead 220, thereby improving the stable operation and service life of the lamp bead 220. The heat sink 230 can be made of a metal material with good heat dissipation effect, such as copper.

[0057] Optionally, the heat sink 230 may be connected to the base 210 and the middle layer 120 by screwing, bonding, or the like.

[0058] As shown in FIG. 1 , in some embodiments of the present application, the housing 100 further has a second opening 100b communicating with the mounting cavity; the electrical module 300 has a resistor 310 for adjusting the power supply voltage, and the resistor 310 has an adjustment portion 311, which is exposed at the second opening 100b and can be moved to adjust the power supply voltage. The experimenter can continuously adjust the power supply voltage of the electrical module 300 to the light source module 200 by operating the adjustment portion 311 of the resistor 310, so as to continuously adjust the optical power of the ultraviolet light generated by the light source module 200 to the optical sensor.

[0059] Optionally, the electrical module 300 further comprises a power supply unit, a data acquisition unit and a calculation unit; the power supply unit is used to supply power to the light source module 200 and is electrically connected to the light source module 200, and the resistor 310 is connected in parallel to the light source module 200; the data acquisition unit is electrically connected to the power supply unit and is used to obtain the magnitude of the power supply voltage of the power supply unit to the light source module 200, and the calculation unit is electrically connected to the data acquisition unit and the display module 400, and is used to calculate the optical power of the light source module 200 based on the magnitude of the power supply voltage. Optionally, the data acquisition unit is a voltmeter, and the calculation unit is a single chip microcomputer.

[0060] Optionally, the resistor 310 can be a knob-type resistor. By twisting the resistor 310, the power supply voltage of the electrical module 300 to the light source module 200 can be adjusted. In this way, the second opening 100b can be set to a structure that matches the outer profile of the adjustment portion 311 of the resistor 310. For example, if the adjustment portion 311 of the resistor 310 is cylindrical, the second opening 100b is set to a circular hole structure with an aperture slightly larger than the outer diameter of the adjustment portion 311, thereby reducing the gap between the adjustment portion 311 and the inner wall of the second opening 100b, thereby improving the aesthetics of the light box 10, and also providing a certain degree of dustproof and waterproofing to the internal components of the box body 100.

[0061] In some embodiments of the present application, the light box 10 further includes an optical power meter (not shown in the drawings), which is detachably arranged at the mounting position and used to measure the optical power of the light source module 200 under different power supply voltages; the electrical module 300 is also used to calibrate the relationship between the optical power and the power supply voltage of the light source module 200 based on the measurement result of the optical power meter, and then determine the optical power of the light source module 200 irradiated on the optical sensor under different power supply voltages based on the relationship. Before testing the performance of the optical sensor, the optical power meter can be installed at the mounting position of the box 100, and the optical power meter can be used to calibrate the relationship between the optical power and the voltage. After that, the optical power meter is removed and the optical sensor is installed at the mounting position of the box 100, and the relationship between the calibrated optical power and the voltage is used to determine the optical power of the light source module 200 irradiated on the optical sensor under different power supply voltages.

[0062] Optionally, the electrical module 300 may include a storage unit, and the storage unit is used to store a relationship between optical power and voltage calibrated by the optical power meter.

[0063] On the other hand, an embodiment of the present application also provides a performance detection system for an optical sensor, which performance detection system includes a detection device and a light box 10 as described in any one of the above items; the mounting position of the light box 10 is used to install the optical sensor to emit light of a preset optical power to the optical sensor; the detection device is located outside the light box 10, and is also used to be electrically connected to the optical sensor and determine the photocurrent and responsiveness of the optical sensor based on the output result of the optical sensor.

[0064] The electrical module 300 of the light box 10 can adjust the power of the ultraviolet light emitted to the day-blind ultraviolet sensor to a reasonable value by adjusting the power supply voltage to the light source module 200, so that the photocurrent generated by the day-blind ultraviolet sensor does not reach saturation. Then the detection equipment determines the photocurrent of the day-blind ultraviolet sensor according to the result output by the day-blind ultraviolet sensor, and accurately calculates the responsiveness of the day-blind ultraviolet sensor in combination with the ultraviolet light power; and the electrical module 300 of the light box 10 can also output the light power of the light source module 200, so that the experimenter can know the photocurrent and responsiveness of the day-blind ultraviolet sensor under the light power, which is convenient for judging the performance of the sensor and conducive to the next step of promoting the testing and research of related sensors and material performance.

[0065] It can be seen that the light box 10 of the performance detection system, by setting the electrical module 300 in the box body 100, can adjust the power of the ultraviolet light emitted to the day-blind ultraviolet sensor to a reasonable value by adjusting the power supply voltage of the light source module 200, so that the photocurrent generated by the day-blind ultraviolet sensor does not reach saturation, and the photocurrent and responsiveness of the sensor can be accurately determined. The electrical module 300 can also output the optical power of the light source module 200, so that the experimenter can know the photocurrent and responsiveness of the day-blind ultraviolet sensor under the optical power, which is convenient for judging the performance of the sensor and conducive to the next step of promoting the testing and research of related sensors and material performance.

[0066] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A light box, characterized in that: include: A box body having a mounting cavity and a mounting position located in the mounting cavity and used for mounting the optical sensor; A light source module is disposed in the installation cavity and is used to emit light toward the installation position; and The electrical module is arranged in the installation cavity and is electrically connected to the light source module to supply power to the light source module. The electrical module is also used to adjust the power supply voltage of the light source module, calculate the optical power of the light source module based on the power supply voltage and send the calculation result.

2. The light box according to claim 1, characterized in that: The box body also has a first opening communicating with the installation cavity; The light box further includes a display module, which is electrically connected to the electrical module and exposed at the first opening to display the calculation result.

3. The light box according to claim 2, characterized in that: The box body comprises an upper box body, an intermediate layer and a lower box body, the top of the upper box body has the first opening, the bottom of the upper box body has a first opening, the top of the lower box body has a second opening, the bottom of the lower box body is provided with the mounting position, and the intermediate layer covers between the first opening and the second opening; The light source module is arranged on the lower surface of the middle layer, and the electrical module and the display module are arranged on the upper surface of the middle layer.

4. The light box according to claim 3, characterized in that: The middle part of the upper surface of the middle layer is used to install the electrical module and the display module, and the middle part of the upper surface of the middle layer protrudes toward the top of the upper box body by the edge of the upper surface of the middle layer and is engaged in the first opening; and / or, The middle portion of the lower surface of the middle layer is used to install the light source module, and the middle portion of the lower surface of the middle layer protrudes toward the bottom of the lower box body beyond the edge of the lower surface of the middle layer and is engaged in the second opening.

5. The light box according to claim 1, characterized in that: The light source module includes a base, a lamp bead and a focusing lens; The base is arranged in the box and is used to install the lamp bead, the lamp bead is electrically connected to the electrical module, and the focusing lens is arranged below the lamp bead and is used to direct the light emitted by the lamp bead to the installation position.

6. The light box according to claim 5, characterized in that: The light source module further comprises a heat sink, and the heat sink is arranged on a side of the base facing away from the lamp bead.

7. The light box according to claim 1, characterized in that: The box body also has a second opening communicating with the installation cavity; The electrical module has a resistor for adjusting the magnitude of the supply voltage, wherein the resistor has an adjustment portion, the adjustment portion is exposed at the second opening and is movable to adjust the magnitude of the supply voltage.

8. The light box according to claim 7, characterized in that: The resistor is a knob-type resistor.

9. The light box according to any one of claims 1 to 8, characterized in that: The light box further comprises an optical power meter, which is detachably arranged at the installation position and is used to measure the optical power of the light source module under different power supply voltages; The electrical module is also used to calibrate the relationship between the optical power and the power supply voltage of the light source module based on the measurement results of the optical power meter, and then determine the optical power irradiated on the optical sensor by the light source module under different power supply voltages based on the relationship.

10. A performance detection system for an optical sensor, characterized in that: comprising a detection device and a light box as claimed in any one of claims 1 to 9; The installation position of the light box is used to install an optical sensor to emit light with a preset optical power to the optical sensor; The detection device is located outside the light box, and is also used to be electrically connected to the optical sensor and determine the photocurrent and responsivity of the optical sensor based on the output result of the optical sensor.

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