CN104102008A - Light receiving device capable of increasing light receiving quantity and angle - Google Patents

Abstract

The invention relates to a light-collecting device that can increase the amount and angle of light-collecting. It includes an integrating sphere and a supporting fixture. The integrating sphere is a hollow circular sphere, and its inner wall surface is uniformly formed with a reflective surface, and its outer wall is There is a light-collecting column and at least one light-emitting column. A light-collecting hole and a light-emitting hole are respectively provided on the light-collecting column and the light-emitting column to communicate with the space in the integrating sphere; the support fixture includes a positioning ring and a light-emitting hole. A light-transmitting glass plate, the positioning ring can be connected to the light-collecting column, and the light-transmitting glass plate is fixed on the top side of the positioning ring for supporting and placing a light-emitting element to be tested, so that the light-emitting element to be tested After the generated light enters the integrating sphere, it can be projected to a light detection device for detection. In this way, since the light-emitting element to be tested can pass through the light-transmitting glass plate and be positioned close to the light-collecting hole, it can effectively increase the number of The light-collecting hole receives the light-collecting amount and light-collecting angle of the light generated by the light-emitting element to be tested, thereby improving detection accuracy.

Description

Light receiving device that can increase the amount and angle of light received

technical field

The invention relates to a light-receiving device capable of increasing the amount and angle of light-receiving, especially a support jig is installed on the light-receiving column of an integrating sphere, so that a light-emitting element to be tested can be positioned adjacent to the light-receiving column, so as to A light-collecting device that increases the amount and angle of light received by the integrating sphere.

Background technique

Light-emitting diode (Light-Emitting Diode, LED) is a semiconductor electronic component that can produce light after being powered on. Compared with traditional lighting appliances, light-emitting diodes have the advantages of high efficiency, low cost, fast response and long service life. Therefore, in recent years, it has been widely used in the fields of traffic signals, lighting equipment, display panels and even optical communications, and has become one of the most influential key technologies in economic development and technology research and development.

The main light-emitting element in the light-emitting diode is the crystal grain. Because the characteristics of the grain, such as luminous brightness, wavelength, color temperature and operating voltage, will vary due to slight differences in processing conditions, and even if it is made of the same crystal grain The luminescent characteristics of the crystal grains cut from a wafer are not exactly the same. Therefore, after the industry cuts the wafer into multiple crystal grains, the cut crystal grains still have to go through a testing procedure to determine the After grading the main wavelength, luminous intensity, luminous flux, color temperature, operating voltage, reverse breakdown voltage and other characteristic parameters of the grains, the grains of different grades are applied to suitable fields.

Generally speaking, today's industry uses integrating spheres (Integrating Sphere) when performing inspection procedures. Integrating spheres are an ideal optical diffuser. Its configuration is a hollow sphere, and the interior is coated with high stability and high reflection. A high-efficiency reflective layer (such as barium sulfate) to form a light-pollution-free space inside to ensure that the light will not be affected by light pollution from other light sources after it is projected into the integrating sphere, thereby reducing the light pollution due to light shape, The detection error caused by the divergence angle and the responsivity of different detection positions makes the detection result more reliable. See also shown in Fig. 1, be a kind of structure of known detection device 1, this detection device 1 comprises an integrating sphere 11 and a point measuring probe 12, this integrating sphere 11 is provided with a light-receiving column 111 and two light-emitting columns 112, the The light-receiving column 111 and the light-emitting column 112 are respectively provided with openings to communicate with the space in the integrating sphere 11. The light-emitting column 112 is respectively connected with an optical fiber 13 and a photodetector 14; The measuring device (not shown in the figure) is positioned at the position corresponding to the light-receiving column 111, and the die 10 with a light-emitting diode is placed under the spot measuring probe 12. When testing, the spot probe 12 can be displaced downwards to be electrically connected to the pins of the die 10 respectively, so that the die 10 can project light, and the light emitted by the die 10 of the light-emitting diode can be projected. After reaching the inside of the integrating sphere 11 , the characteristic parameters of the crystal grain 10 of the LED are detected through the optical fiber 13 and the photodetector 14 .

The light projected by the crystal grain 10 can be reflected and diffused in the integrating sphere 11 to form a very uniform light beam, which is received by the optical fiber 13 and the photodetector 14, effectively avoiding various interferences that may cause errors factor. However, in practice, the light data detected by the detection device 1 cannot fully reflect the real characteristics of the crystal grain 10 ideally during the detection process. The reasons and the defects of the detection device 1 are now described in detail. as follows:

(1) The distance between the crystal grain 10 and the light receiving column 111: since the crystal grain 10 must be energized and driven through the spot measuring probe 12, there must be a distance D1 between the crystal grain 10 and the light receiving column 111, Therefore, the light projected by the crystal grain 10 cannot be ideally projected into the integrating sphere 11 without external interference, and the crystal grain 10 still has a predetermined projection angle A when projecting light. , if the projection angle A is large or the distance D1 is too long, after the light passes through the distance D1, part of the light cannot be collected by the light-receiving column 111, which will affect the accuracy of measurement .

(2) Aperture size of the opening on the light receiving column 111: As mentioned above, since the distance D1 exists between the light receiving column 111 and the crystal grain 10, the opening on the light receiving column 111 must be It needs to be designed to be far larger than the crystal grain 10, so as to avoid the problem that the light cannot all enter the integrating sphere 11 after being diffused through the projection angle A. However, the opening of the light receiving column 111 and the When the crystal grains 10 do not match, the light projected by the crystal grains 10 may be emitted by the light receiving column 111 after being reflected and diffused in the integrating sphere 11, resulting in a completely airtight detection system in the integrating sphere. The environment is destroyed, which affects the accuracy of detection.

Therefore, how to improve the known detection device to solve the problem that the light generated by the crystal grain 10 cannot completely enter the integrating sphere 11 during the detection process in the past, and the reflected and diffused light in the integrating sphere 11, The problem that the light receiving column 111 may leak to the outside becomes an important problem that the present invention wants to solve here.

Contents of the invention

In view of the problem that the amount of light received by the integrating sphere is limited by the angle of light received by the crystal grains when performing the detection procedure of the known detection device, the inventor finally designed the A light-receiving device capable of increasing the amount and angle of light-receiving is proposed, which is expected to solve many problems of the known detection device.

The object of the present invention is to provide a light-receiving device capable of increasing the light-receiving amount and angle, the light-receiving device includes an integrating sphere and a supporting jig, wherein the integrating sphere is a hollow circular sphere, the The surface of the inner wall of the integrating sphere is evenly coated or formed with a reflective surface, and the outer wall of the integrating sphere is provided with a light receiving hole and at least one light outlet hole, and the light receiving hole and the light outlet hole are respectively connected with the space in the integrating sphere ; The supporting fixture includes a positioning ring and a light-transmitting glass plate, wherein the positioning ring can be fixed to the position corresponding to the light receiving hole on the integrating sphere, and integrated with the integrating sphere , the light-transmitting glass plate is fixed on the top side of the positioning ring, so that when the positioning ring and the integrating sphere are integrated, the light-transmitting glass plate can correspond to the light receiving hole. In this way, since the light-emitting element to be tested is directly placed on the light-transmitting glass plate adjacent to the light-receiving hole, the distance between the integrating sphere and the light-emitting element to be tested can be effectively reduced, and the light-emitting element to be tested can be avoided. The problem that the light generated by the light-emitting element under test cannot completely enter the integrating sphere after being diffused through a light-emitting angle, so as to ensure that all the light generated by the light-emitting element to be tested within the range of the light-emitting angle can be uniformly reflected by the reflective surface and Diffused, and then emitted through the light exit hole, effectively improving the measurement accuracy of the light detection device for the light-emitting element to be tested.

In a preferred embodiment, on the surface of the light-transmitting glass plate facing the light-receiving hole, a light-transmitting detection area is formed in the center corresponding to the position for supporting and placing the light-emitting element to be tested. The rest of the parts are coated with a light-reflecting layer to form an opaque reflection area, and the configuration of the light-transmitting detection area corresponds to the size of the light-emitting element to be tested.

In this way, since the configuration of the light-transmitting detection area corresponds to the size of the light-emitting element to be tested, the light-emitting element to be tested will be The generated light, in addition to being uniformly reflected and diffused by the reflective surface in the integrating sphere, will also be reflected back into the integrating sphere with the assistance of the opaque reflection area until forming Uniform light intensity passes through the light exit hole until it exits the integrating sphere, so as to reduce the degree of reflection and diffuse light lost from the light collection hole.

Description of drawings

Fig. 1 is a schematic diagram of a known detection device;

Fig. 2 is a schematic perspective view of the light receiving device of the present invention;

3A is a schematic diagram of the operation of the light receiving device of the present invention; and

FIG. 3B is a schematic diagram of the operation of the light receiving device of the present invention.

Description of main components

Light receiving device ……… 2

Integrating sphere ……… 21

Reflective surface ......... 210

Receiving Pillar ……… 211

Light receiving hole ......... 211a

Light Pillar ......... 212

Light exit hole ......... 212a

Support fixtures ……… 22

Locating ring ......... 221

Positioning space ......... 221a

Fitting elements ......... 221b

Translucent glass plate ……… 222

Point probe ......... 30

Light-emitting element to be tested ……… L

Translucent detection area ………… F1

Opaque reflection area ……… F2

Beaming Angle                                

Sealing element ……… M

Thickness ......... D2

Detailed ways

In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will be further described in conjunction with the accompanying drawings.

The present invention is a light-receiving device that can increase the light-receiving amount and angle. Please refer to Fig. 2 and Fig. 3A, which is the first preferred embodiment of the present invention. The light-receiving device 2 includes an integrating sphere 21 and a support Fixture 22, the configuration of the integrating sphere 21 is a hollow spherical body, its inner wall surface is evenly coated or formed with a reflective surface 210, and its outer wall is protruded with a light-receiving column 211 and at least one light-emitting column 212 (the The number of light-emitting columns 212 can be adjusted according to the actual detection method of the industry), the center of the light-receiving column 211 is provided with a light-receiving hole 211a, and the center of each light-emitting column 212 is respectively provided with a light-emitting hole 212a, and the light-receiving hole 211a and the light-emitting The hole 212a communicates with the space inside the integrating sphere 21 .

The support fixture 22 includes a positioning ring 221 and a light-transmitting glass plate 222. The positioning ring 221 faces the inner edge of the bottom side of the integrating sphere 21 to provide a positioning space 221a. The configuration of the positioning space 221a is similar to that of the light receiving column 211 The configuration of the ring 221 is matched with the shape of the light receiving column 211, and the positioning ring 221 is movably provided with a plurality of fitting elements 221b, so that the user can turn one end of each fitting element 221b to make the The other end of the fitting element 221b is pressed to the periphery of the light-receiving column 211, so that the positioning ring 221 and the light-receiving column 211 are integrated; to pass through the positioning ring 221 and be positioned at the position corresponding to the light receiving hole 211a, so that the light from the outside can pass through the light-transmitting glass plate 222 and the light receiving hole 211a in sequence and enter the integrating sphere 21 in.

Based on many years of practical experience, the inventor has found that the reason why the known detection device has too large detection error is that the main reason is that in the past, when performing the detection procedure, the crystal grains of the light-emitting diode must first be placed on a detection platform, and then The crystal grains of the light-emitting diodes are driven to light up one by one through the point measuring device. It can be seen that the space occupied by the point measuring device is the main source of detection errors. Therefore, please refer to FIG. A key point of the design of the device 2 is to use the light-transmitting glass plate 222 as a supporting surface that can directly carry a light-emitting element L (such as: a crystal grain of a light-emitting diode) to be tested, so that the light-emitting element L to be tested can pass through the light-emitting element L. The light-transmitting glass plate 222 is closely attached to the light-receiving column 211 , thereby ensuring that the light of the light-emitting element L to be tested can be completely projected into the integrating sphere 21 . When carrying out the detection procedure, the industry can connect and install a photodetector (not shown) on each light-emitting column 212 respectively; ), since the structure of the photodetector is not the focus of protection of the present invention, in Figures 3A and 3B, only the appearance of the two sealing elements M installed on the integrating sphere 21 is drawn, in order to clearly show the shape of the integrating sphere 21 The internal configuration is explained together here.

Please refer to Fig. 2 to Fig. 3B, in this embodiment, the light receiving device 2 cooperates with a point measuring device (not shown in the figure) to detect the light-emitting element L to be tested, and the point detecting device of the point measuring device The needle 30 is positioned above the light receiving device 2, and can move up and down. Since the spot measuring probe 30 is arranged in the direction away from the integrating sphere 21 of the support jig 22, the point measuring probe 30 The occupied space will not affect the detection accuracy of the light receiving device 2 . When the measuring probes 30 are respectively electrically connected to the pins of the light-emitting element L to be tested, the light-emitting element L to be tested will be powered and driven to generate light, and the light can pass through the light receiving hole 211a, Into the integrating sphere 21, then the light will be evenly reflected and diffused by the reflective surface in the integrating sphere 21 to form a uniform light intensity distribution in the integrating sphere 21, and then pass through the light exit hole 212a, Out of the integrating sphere 21, the light detection device can detect a very uniform diffused light beam through the light exit hole 212a, and detect the light-emitting element L to be tested accordingly.

As mentioned above, in the first preferred embodiment of the present invention, on the surface of the light-transmitting glass plate 222 facing the light-receiving hole 211a, a light-transmitting detection area is formed except for the central portion corresponding to the light-emitting element L to be tested. Except for F1, the remaining parts are coated with a reflective layer to form an opaque reflection area F2, and the configuration of the light-transmitting detection area F1 corresponds to the size of the light-emitting element L to be tested. In this way, when the spot measuring probe 30 applies current to the light-emitting element L to be tested for point measurement, the light generated by the light-emitting element L to be tested passes through the transparent glass plate 222 and the light-receiving element in sequence. After the hole 211a is injected into the integrating sphere 21, in addition to being uniformly reflected and diffused by the reflecting surface in the integrating sphere 21, it will also be reflected back to the integrating sphere with the aid of the opaque reflection area F2 21, continue to be reflected and diffused by the reflective surface until a uniform light intensity is formed, and then exit the integrating sphere 21 through the light exit hole 212a, so the degree of reflection and diffused light being lost by the light receiving hole 211a can be greatly reduced .

1, 2, and 3B, after comparing the known detection device 1 with the light-receiving device 2 of the present invention, it can be clearly seen that when the light-receiving device 2 is used for detection, the light-emitting element L to be tested and the integrating sphere The distance between 21 is only the thickness D2 of the light-transmitting glass plate 222, which is not only far shorter than the distance D1 in FIG. The light generated by the light-emitting element L to be tested does not need to pass through the outside air before entering the integrating sphere 21. Accordingly, it can ensure that the light will not be disturbed by the outside world and improve the accuracy of detection. In addition, the to-be-tested Although the light generated by the light-emitting element L under test has a light-emitting angle θ, however, since the light-transmitting glass plate 222 is adjacent to the light-receiving hole 211a and the light-transmitting detection area F1, the light generated by the light-emitting element L to be tested enters the integral After the sphere 21, it will diffuse with the luminous angle θ, that is, the light receiving device 2 of the present invention can ensure that the light generated by the light-emitting element L to be tested is completely projected into the integrating sphere 21, so that the light of the integrating sphere 21 The amount of received light is larger than that of the known detection device, and at the same time, the problem of the received light angle can be perfectly solved.

It should be particularly mentioned here that the light receiving hole 211a of the integrating sphere 21 drawn in FIG. on the outer wall of the integrating sphere 21 without passing through the light-receiving rod 211 . The operator only needs to design the bottom side of the positioning ring 221 to match the position corresponding to the light receiving hole 211a on the integrating sphere 21 (such as: an arc-shaped concave surface to be attached to the integrating sphere 21, or to make the integrating sphere 21 The positioning ring 221 can be embedded in an inserting groove on the integrating sphere 21 ), and can also be airtightly fixed on the integrating sphere 21 at a position corresponding to the light receiving hole 211a. In addition, in the first preferred embodiment of the present invention, the positioning ring 221 is pressed against the outer edge of the light emitting column 212 through the fitting elements 221b, and the transparent glass plate 222 is directly fixed (such as : fixed with glue) on the top surface of the positioning ring 221, however, in other preferred embodiments of the present invention, the positioning method of the positioning ring 221 and the light-transmitting glass plate 222 is not limited to the aforementioned method The positioning ring 221 can still be integrated with the light-receiving column 211 by inserting, screwing, etc., and the light-transmitting glass plate 222 can also be fixed on the positioning ring 221 by fitting or inserting. superior.

In addition, in the aforementioned embodiments, the transparent glass plate 222 is divided into the light-transmitting detection area F1 and the opaque reflection area F2 through the reflective layer. However, the industry can also directly use different materials to make the light-transmitting glass plate 222. That is, the industry can use a light-transmitting material to make the light-transmitting detection area F1 on the light-transmitting glass plate 222, and use a whole piece of light-impermeable reflective material to make the light-impermeable reflective area F2. In this way, the same effect can also be achieved. Effect. In addition, in the aforementioned embodiments, the material of the reflective layer is the same as that of the reflective surface 210 in the integrating sphere 21 to achieve a better detection effect. However, in practice, the material of the reflective layer can still be determined by the industry. needs to be adjusted.

The above descriptions are only some preferred embodiments of the present invention, but the technical solutions of the present invention are not limited thereto. Those in the relevant technical field can easily think of equivalents after considering the technical contents of the present invention. Changes should not depart from the scope of protection of the present invention.

Claims (4)

1. A light-receiving device that can increase the light-receiving amount and angle, is characterized in that, the light-receiving device that can increase the light-receiving amount and angle includes: An integrating sphere is a hollow circular sphere with a reflective surface formed on its inner wall surface, a light receiving hole and at least one light outlet hole are provided on the outer wall of the integrating sphere, and the light receiving hole and the light outlet hole are respectively connected to the The spaces within the integrating sphere are connected; and A support fixture, including a positioning ring and a light-transmitting glass plate, wherein the configuration of the bottom side of the positioning ring matches the configuration of the part corresponding to the light receiving hole on the integrating sphere, so that the The positioning ring can be fixed on the integrating sphere at a position corresponding to the light receiving hole, and is integrated with the integrating sphere, and the light-transmitting glass plate is fixed on the top side of the positioning ring, so that the The light-transmitting glass plate can correspond to the light-receiving hole, and a light-emitting element to be measured is positioned on the side surface of the light-transmitting glass plate facing away from the light-receiving hole, and a light detection device is positioned on the light-receiving hole. In the case of a light exit hole, the light generated by the light-emitting element to be tested can pass through the light-transmitting glass plate and the light-receiving hole in sequence, and be projected into the integrating sphere, and be reflected by the reflecting surface in the integrating sphere. After being uniformly reflected and diffused, it is projected from the light exit hole to the light detection device. 2. The light-receiving device according to claim 1, characterized in that, on the surface of the other side of the light-transmitting glass plate facing the light-receiving hole, except for the central part corresponding to the light-emitting element to be tested, a Outside a light-transmitting detection area, the remaining parts are coated with a light-reflecting layer to form an opaque reflection area, and the configuration of the light-transmitting reflection area corresponds to the size of the light-emitting element to be tested. 3. The light-receiving device according to claim 2, wherein the light-receiving hole is set at the central part of a light-receiving column on the integrating sphere, and the configuration of the light-receiving column is consistent with that of the positioning ring. A positioning space opened on the bottom side matches, and the outer edge of the positioning ring is still movably embedded with a plurality of fitting elements, so that when the bottom side of the positioning ring is sleeved on the light-receiving column One end of each fitting element can be rotated so that the other end is pressed against the periphery of the light-receiving column, so that the positioning ring can be tightly integrated with the light-receiving column. 4. The light collecting device according to claim 3, wherein the material of the reflective layer on the transparent glass plate is the same as that of the reflective surface on the inner wall of the integrating sphere.