Lamberg distribution tester

Abstract

The utility model discloses a Lamberg distribution tester which comprises an instrument cabin, a diaphragm is arranged in the instrument cabin, a spectrograph is arranged on one side of the diaphragm and connected with the diaphragm through an optical fiber, a rotating table is arranged on the other side of the diaphragm, a light-emitting device is arranged on the rotating table, and the rotating table drives the light-emitting device to rotate. And light emitted by the light-emitting device passes through the diaphragm and then is input into the spectrograph. Furthermore, a calibration light source is arranged on one side of the diaphragm, the calibration light source is connected with the diaphragm through an optical fiber, and light emitted by the calibration light source passes through the optical fiber, penetrates through the diaphragm and reaches a light emitting point of the light emitting device. In conclusion, according to the Lamberg distribution tester provided by the embodiment of the invention, through the innovative designs such as the subdivision design, the high-precision diaphragm, the high-resolution spectrometer and the rotatable light-emitting device, the stability, flexibility and accuracy of a test system are remarkably improved, and an efficient and reliable solution is provided for the test of light source characteristics.

Description

Technical Field

[0001] The utility model relates to the technical field of optical detection instruments, in particular to a Lambert distribution tester. Background Art

[0002] Various light-emitting devices are used in the fields of lighting and display. Different light-emitting devices have different spatial distributions. For example, halogen bulbs emit light in all directions with a large solid angle; direct-plug LED lamp beads only emit light at specific angles with a small solid angle; the most commonly used vapor-deposited light-emitting devices, including OLED, QLED and other light-emitting devices, only emit light on one side of the device, and the spatial distribution of luminous intensity is usually considered to be a Lambert distribution.

[0003] However, sometimes, due to changes in the device structure or modifications to the device's light-emitting surface, the device may deviate from the Lambert distribution characteristics. Some device performance tests are based on the device's Lambert distribution characteristics to model and calculate the measurement results. For example, using a brightness meter combined with a digital source meter to measure the external quantum efficiency EQE of a light-emitting device strictly requires that the light-emitting device conform to the Lambert distribution characteristics, otherwise the measurement results will produce a large error. Since the external quantum efficiency EQE is one of the most important properties of a light-emitting device, the brightness meter method is a very commonly used method for measuring the external quantum efficiency. Therefore, it is necessary to develop an instrument specifically for measuring the spatial distribution characteristics of the luminous intensity, the solid angle, and whether it conforms to the Lambert distribution characteristics of a light-emitting device. Utility Model Content

[0004] The utility model aims at solving the problems existing in the prior art and provides a Lambert distribution tester.

[0005] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A Lambert distribution tester comprises an instrument cabin, wherein an aperture is arranged in the instrument cabin, a spectrometer is arranged on one side of the aperture, the spectrometer is connected to the aperture through an optical fiber, a rotating platform is arranged on the other side of the aperture, a light emitting device is arranged on the rotating platform, the rotating platform drives the light emitting device to rotate, and the light emitted by the light emitting device passes through the aperture and is input into the spectrometer.

[0007] Furthermore, a calibration light source is provided on one side of the aperture, and the calibration light source is connected to the aperture via an optical fiber, and light emitted by the calibration light source passes through the optical fiber and the aperture to reach the light-emitting point of the light-emitting device.

[0008] Furthermore, the instrument cabin includes a cabin body, in which a partition is provided, the partition divides the cabin body into two containing chambers, the spectrometer and the calibration light source are arranged in one of the cabins, the rotating table and the light emitting device are arranged in the other cabin, and the diaphragm is fixed on the partition.

[0009] Furthermore, the rotating platform includes a rotating base and a clamping seat arranged on the rotating base, and the clamping seat clamps and fixes the light-emitting device vertically.

[0010] Furthermore, the rotating base includes a seat body, a gear group is provided inside the seat body, a storage platform is provided on the top, a driving motor is provided on one side of the seat body, the driving motor drives the gear group to rotate, the gear group drives the storage platform to rotate, and the clamping seat is arranged on the storage platform and rotates with the storage platform.

[0011] Furthermore, the clamping seat includes a bottom plate, the bottom plate is fixed on the storage table, and a U-shaped clamping hand is provided above the bottom plate.

[0012] Furthermore, the optical fiber is a bifurcated optical fiber.

[0013] Beneficial effects of the utility model:

[0014] The light-emitting device is driven to rotate by the rotating table, and the spectrometer detects the spatial distribution of the luminous intensity of the light-emitting device at different angles, and calculates the solid angle and Lambert factor based on the detection results. In addition, the compartment design of the instrument cabin effectively improves the stability and anti-interference ability of the test system. By separating the spectrometer, calibration light source, rotating table, and light-emitting device in two different cabins, not only mutual interference is avoided, but also the stability of the test environment is ensured, thereby improving the accuracy of the test results. Secondly, the high-precision stainless steel diaphragm ensures the precise control and stable transmission of the light beam. The aperture of the diaphragm is adjustable, which can meet the test requirements of different light sources, further improving the flexibility and applicability of the test. Furthermore, the high-resolution and high-sensitivity spectrometer can accurately measure the wavelength, intensity and other parameters of the light emitted by the light source, providing strong support for the comprehensive analysis of the light source characteristics. At the same time, the use of bifurcated optical fiber as the connecting medium ensures the transmission efficiency and stability of the light beam and improves the reliability of the test. Finally, the design of the rotating table enables the light-emitting device to be easily rotated at multiple angles, realizing the multi-angle light source characteristic test. This not only expands the test range, but also improves the test efficiency. The U-shaped design of the clamping seat ensures the stability of the light-emitting device during rotation, further ensuring the accuracy of the test results.

[0015] In summary, the Lambert distribution tester provided in this implementation case has significantly improved the stability, flexibility and accuracy of the test system through innovative designs such as cabin design, high-precision aperture, high-resolution spectrometer and rotatable light-emitting device, providing an efficient and reliable solution for the testing of light source characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the Lambert distribution tester of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the instrument cabin of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the rotating table of the utility model.

[0019] In the figure: 1-instrument cabin, 11-cabin body, 12-partition, 2-aperture, 3-spectrometer, 4-optical fiber, 5-rotating table, 51-rotating base, 511-base body, 512-storage table, 513-driving motor, 52-clamping seat, 521-bottom plate, 522-U-shaped clamping hand, 6-light-emitting device, 7-calibration light source. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0022] Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral 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, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] Please refer to Figure 1 , a Lambert distribution tester provided by the utility model comprises an instrument cabin 1, an aperture 2 is arranged in the instrument cabin 1, a spectrometer 3 is arranged on one side of the aperture 2, the spectrometer 3 is connected to the aperture 2 through an optical fiber 4, a rotating platform 5 is arranged on the other side of the aperture 2, a light emitting device 6 is arranged on the rotating platform 5, the rotating platform 5 drives the light emitting device 6 to rotate, and the light emitted by the light emitting device 6 passes through the aperture 2 and is input into the spectrometer 3. By rotating the rotating platform 5, the light emitting angle of the light emitting device 6 can be adjusted, and then multi-angle detection can be realized.

[0024] Please refer to Figure 2, wherein the instrument cabin 1 is the main part of the entire Lambert distribution tester, providing space for installation and fixation of other components. A plurality of mounting holes and fixing seats are provided in the cabin to facilitate the installation and fixation of other components. In order to improve the stability and anti-interference ability of the test system, a compartment design is adopted in this embodiment. The instrument cabin includes a cabin body 11 and a partition 12. A partition 12 is provided inside the cabin body 11, and the partition 12 divides the cabin body 11 into two containing compartments. The spectrometer 3 and the calibration light source 7 are arranged in one of the cabins; the rotating table 5 and the light-emitting device 6 are arranged in the other cabin. The aperture 2 is fixed on the partition 12 to ensure that the light path between the two cabins is unobstructed.

[0025] The aperture 2 is one of the key components in the Lambert distribution tester, which is used to limit the light beam entering the spectrometer 3. In this embodiment, the aperture 2 is made of high-precision processed stainless steel material, which has good optical performance and stability. The aperture of the aperture 2 can be adjusted as needed to meet the testing requirements of different light sources. One side of the aperture 2 is connected to the spectrometer 3 through an optical fiber 4, and the other side is opposite to the rotating table 5, ensuring that the light emitted by the light emitting device 6 can pass through the aperture 2 and enter the spectrometer 3.

[0026] The spectrometer 3 is one of the core components of the Lambert distribution tester, and is used to receive and analyze the light beam transmitted by the aperture 2. In this embodiment, the spectrometer 3 uses high-resolution and high-sensitivity spectral analysis technology, and can accurately measure the wavelength, intensity and other parameters of the light emitted by the light source. The spectrometer 3 is connected to the aperture 2 through an optical fiber 4 to ensure the transmission efficiency and stability of the light beam.

[0027] The optical fiber 4 is an important component used to connect the aperture 2 and the spectrometer 3 in this embodiment. Considering that multiple components may need to be connected simultaneously during the test, a bifurcated optical fiber is used as a connection medium in this embodiment. The bifurcated optical fiber has multiple branches and can connect multiple components simultaneously, thereby improving the flexibility and efficiency of the test.

[0028] Please refer to Figure 3 The rotating platform 5 is used to drive the light emitting device 6 to rotate, thereby changing the distribution of the light emitted by the light emitting device 6 in space. In this embodiment, the rotating platform 5 includes a rotating base 51 and a clamping seat 52. The clamping seat 52 clamps and fixes the light emitting device 6 vertically. The rotating base 51 includes a base body 511. A gear set (not shown) is provided inside the base body 511. A storage platform 512 is provided on the top. A driving motor 513 is provided on one side of the base body 511. The driving motor 513 drives the gear set to rotate, and the gear set drives the storage platform 512 to rotate. The clamping seat 52 is arranged on the storage platform 512 and rotates with the storage platform 512.

[0029] The clamping seat 52 includes a bottom plate 521, which is fixed on the storage table 512. A U-shaped clamping hand 522 is provided above the bottom plate 521. The U-shaped clamping hand 522 can vertically clamp and fix the light emitting device 6 to ensure the stability of the light emitting device 6 during rotation.

[0030] Working principle:

[0031] During the test, the light emitting device 6 is first inserted into the U-shaped clamping hand 522, and then the calibration light source 7 and the spectrometer 3 are started. At the same time, the light emitting device 6 is lit with direct current. The light signal emitted by the light emitting device 6 passes through the aperture 2 and is received by the optical fiber 4. The optical fiber 4 transmits the light signal to the spectrometer 3 to obtain the spectrum, and the spectrometer 3 calculates the luminous intensity. At the same time, the rotating table 5 drives the light emitting device 6 to rotate to different predetermined angles, and the spectrometer 3 can measure the luminous intensity at different angles. First test the luminous intensity at an angle of 0 degrees, and then measure the luminous intensity at other set angles. The luminous intensity at other angles is divided by the luminous intensity at an angle of 0 degrees to obtain the luminous intensity ratio at different angles. The Lambert factor and the luminous solid angle can be calculated by the luminous intensity ratio at different angles. The light emitted by the calibration light source 7 passes through the optical fiber 4 and the aperture 2 and reaches the luminous point of the light emitting device 6, ensuring that the luminous point is aligned with the aperture 2.

[0032] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A Lambert distribution tester, characterized in that: The invention comprises an instrument cabin (1), wherein an aperture (2) is arranged in the instrument cabin (1), a spectrometer (3) is arranged on one side of the aperture (2), the spectrometer (3) is connected to the aperture (2) via an optical fiber (4), a rotating platform (5) is arranged on the other side of the aperture (2), a light emitting device (6) is arranged on the rotating platform (5), the rotating platform (5) drives the light emitting device (6) to rotate, and light emitted by the light emitting device (6) passes through the aperture (2) and is input into the spectrometer (3).

2. The Lambert distribution tester according to claim 1, characterized in that: A calibration light source (7) is also provided on one side of the aperture (2); the calibration light source (7) is connected to the aperture (2) via an optical fiber (4); light emitted by the calibration light source (7) passes through the optical fiber (4) and the aperture (2) to reach the light-emitting point of the light-emitting device (6).

3. The Lambert distribution tester according to claim 1, characterized in that: The instrument cabin (1) comprises a cabin body (11), a partition (12) is arranged in the cabin body (11), and the partition (12) divides the cabin body into two containing chambers. The spectrometer (3) and the calibration light source (7) are arranged in one of the cabins, the rotating table (5) and the light emitting device (6) are arranged in the other cabin, and the diaphragm (2) is fixed on the partition (12).

4. The Lambert distribution tester according to claim 1, characterized in that: The rotating platform (5) comprises a rotating base (51) and a clamping seat (52) arranged on the rotating base (51), and the clamping seat (52) clamps and fixes the light-emitting device (6) vertically.

5. The Lambert distribution tester according to claim 4, characterized in that: The rotating base (51) comprises a base body (511), a gear set is arranged inside the base body (511), a storage platform (512) is arranged on the top, a driving motor (513) is arranged on one side of the base body (511), the driving motor (513) drives the gear set to rotate, the gear set drives the storage platform (512) to rotate, and the clamping base (52) is arranged on the storage platform (512) and rotates with the storage platform (512).

6. The Lambert distribution tester according to claim 5, characterized in that: The clamping seat (52) comprises a bottom plate (521), the bottom plate (521) is fixed on the storage platform (512), and a U-shaped clamping hand (522) is provided above the bottom plate (521).

7. The Lambert distribution tester according to claim 1, characterized in that: The optical fiber (4) is a bifurcated optical fiber.

Images