TW201331560A - Light-receiving apparatus capable of increasing light-receiving magnitude and angle - Google Patents

Abstract

The invention is a light-receiving apparatus capable of increasing light-receiving magnitude and angle. It includes an integrating sphere and a supporting fixture wherein the integrating sphere is a hollow spherical ball in which a reflecting surface is formed on its inner wall surface. A light-receiving pillar and at least a light-emitting pillar are provided on the outer wall of the integrating sphere. A light-receiving hole and a light-emitting hole are set up on the light-receiving pillar and the light-emitting pillar respectively for connecting to space in the integrating sphere. The supporting fixture includes a locating ring and a transparent glass plate. The locating ring can join the light-receiving pillar. The transparent glass plate is set on top side of the locating ring for supporting and placing a light-emitting device to be tested. After light generated by the light-emitting device to be tested entering the integrating sphere, it can be reflected and diffused uniformly by reflecting surface in the integrating sphere before being projected to an optical detection apparatus through the light-emitting hole for carrying out detection. Accordingly, since the light-emitting device to be tested can be located at a position next to the light-receiving hole by the transparent glass plate, light-receiving magnitude and angle of light, generated by the light-emitting device to be tested which is received by the light-receiving hole, can be increased effectively for raising accuracy of detection.

Description

Light-receiving device capable of increasing light collection amount and angle

The invention relates to a light-receiving device capable of increasing the amount of light received and an angle, in particular to a supporting fixture on a light-collecting column of an integrating sphere, so that a light-emitting element to be tested can be positioned adjacent to the light-receiving column, A light collecting device that increases the amount and angle of light collected by the integrating sphere.

Light-Emitting Diode (LED) is a kind of semiconductor electronic component that can produce bright light after being energized. Compared with traditional lighting appliances, the light-emitting diode has high efficiency, low cost and fast response speed. The advantages of long service life have been widely used in traffic signs, lighting fixtures, display panels and even optical communications in recent years, becoming one of the most influential key technologies in economic development and technology research and development.

The main illuminating element in the illuminating diode is crystal grain. The characteristics of the luminescence brightness, wavelength, color temperature and operating voltage of the dies may vary depending on slight differences in process conditions, and even if they are the same A wafer-cut wafer has a different luminescent property. Therefore, after the wafer is diced into a plurality of dies, the diced die must undergo a test procedure to According to the characteristic parameters such as the dominant wavelength of the crystal, the luminous intensity, the luminous flux, the color temperature, the operating voltage, and the reverse breakdown voltage, the different grades of the crystal grains are applied to a suitable field.

Generally speaking, in today's industry, the integration process is used to integrate the integrating sphere (Integrating Sphere). The integrating sphere is an ideal optical diffuser. Its configuration is a hollow sphere, and the interior is coated with high stability and high reflection. Rate one of the reflective layers (such as barium sulfate) to form a space without light in the interior, ensuring that the light is not affected by the light damage of other light sources after being projected into the integrating sphere, thereby reducing the shape of the light, The detection error caused by the divergence angle and the responsiveness of different detection positions makes the detection result more reliable. Referring to FIG. 1 , the structure of a conventional detecting device 1 includes an integrating sphere 11 and a probe. 12, the integrating sphere 11 is provided with a light-receiving column 111 and two light-emitting columns 112, and 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, and the light-emitting column 112 and the light-emitting column 112 respectively The optical fiber 13 and a photodetector 14 are connected; the spotting probe 12 is positioned at a position corresponding to the light receiving column 111 via a point measuring device (not shown), and a light is emitted under the spotting probe 12 The die 10 of the diode. When the detection is performed, the spotting probe 12 can be displaced downward to be electrically connected to the pins of the die 10, respectively, so that the die 10 projects light to cause the die 10 of the light emitting diode to emit After the light is projected into the inside of the integrating sphere 11, the characteristic parameters of the crystal 10 of the light-emitting diode are detected by the optical fiber 13 and the photodetector 14.

The light projected by the die 10 can be reflected and diffused in the integrating sphere 11 to form a very uniform beam, which is received by the optical fiber 13 and the photodetector 14, effectively avoiding various interference factors that may cause errors. . However, in actuality, when the detection process is performed, the true characteristics of the die 10 are not completely reflected by the light data detected by the detecting device 1, and the reason and the detecting device 1 are respectively described in detail. The defects are as follows:

(1) The distance between the die 10 and the light-receiving column 111: Since the die 10 must be electrically driven via the spot probe 12, there must be a separation distance D1 between the die 10 and the light-receiving column 111. Therefore, the light projected by the die 10 is not ideally projected into the integrating sphere 11 without being disturbed by the outside, and the die 10 has a predetermined projection angle A when projecting the light. If the projection angle A is large or the interval distance D1 is too long, after the light passes through the separation distance D1, part of the light is inevitably collected by the light collecting column 111, which affects the accuracy of the measurement. degree.

(2) The aperture size of the aperture in the light-receiving column 111: as described above, since the distance between the light-receiving column 111 and the crystal grain 10 is the distance D1, the opening of the light-receiving column 111 is inevitable when the detection is performed. It needs to be designed to be much larger than the die 10, so that the problem that the light cannot be completely entered into the integrating sphere 11 after the light is diffused through the projection angle A is avoided as much as possible. However, the opening of the light-receiving column 111 is If the crystal grains 10 do not match, after the light projected by the crystal grain 10 is reflected and diffused in the integrating sphere 11, it may be emitted by the light-receiving column 111, so that the integrating sphere should be completely sealed. The detection environment is destroyed, which in turn affects the accuracy of detection.

Therefore, how to improve the conventional detection device to solve the past During the detection process, the light generated by the crystal grain 10 cannot completely enter the integrating sphere 11, and the reflected and diffused light in the integrating sphere 11 may be leaked to the outside by the light-receiving column 111, that is, The present invention is an important problem to be solved here.

In view of the fact that the detection device is performing the detection procedure, the amount of light collected by the integrating sphere is limited by the angle of the light receiving angle of the crystal grain, and the inventor finally studies, tests and improves after years of practical experience. A light-receiving device capable of increasing the amount of light and the angle of the light is designed, and the problems of the conventional detecting device can be solved.

An object of the present invention is to provide a light-receiving device capable of increasing the amount of light received and an angle, the light-receiving device comprising an integrating sphere and a supporting fixture, wherein the integrating sphere is a hollow circular sphere, and the integrating sphere is The inner wall surface is evenly coated or formed with a reflecting surface, the outer wall of the integrating sphere is provided with a light collecting hole and at least one light emitting hole, and the light collecting hole and the light exiting hole are respectively connected with the space in the integrating sphere; The utility model comprises a positioning ring and a light-transmissive glass plate, wherein the positioning ring can be fixed to a position corresponding to the light-receiving hole on the integrating sphere, and integrated with the integrating sphere, the light-transmissive glass plate is fixed On one of the top sides of the positioning ring, the light-transmissive glass plate can correspond to the light-receiving hole when the positioning ring is integrated with the integrating sphere. In this way, since the light-emitting component to be tested is directly placed on the light-transmissive glass plate adjacent to the light-receiving hole, the distance between the integrating sphere and the light-emitting component to be tested can be effectively reduced, and the light-emitting component to be tested is avoided. After the generated light is diffused by a light-emitting angle, the problem that the integrating sphere cannot be completely entered is ensured that all the light generated by the light-emitting element to be tested in the range of the light-emitting angle can be uniformly reflected and diffused, and then the light is emitted. The hole is emitted to effectively improve the measurement accuracy of the light detecting device to the light-emitting element to be tested.

Another object of the present invention is that the light-transmissive glass plate faces a side surface of the light-receiving hole, except that a light-transmissive detection area is formed at a portion corresponding to a portion for supporting and placing the light-emitting element to be tested. Each of the coatings is coated with a light reflecting layer to form an opaque reflecting area, and the configuration of the light transmitting detecting area corresponds to the size of the light emitting element to be tested. In this way, since the configuration of the light-transmitting detection region corresponds to the size of the light-emitting element to be tested, when a probe is applied to the light-emitting element to be tested, the light generated by the light-emitting element to be tested is measured. In addition to being uniformly reflected and diffused by the reflecting surface in the integrating sphere, it is reflected back into the integrating sphere by the aid of the opaque reflecting area until a uniform light intensity is formed through the light exiting hole. , shooting the score ball outside Stop to reduce the extent to which the reflected and diffused light is lost by the light-receiving aperture.

For the sake of review, the reviewer can have a further understanding and understanding of the technical, structural features and purposes of the present invention. The embodiments are described in conjunction with the drawings, which are described in detail as follows:

[study]

1‧‧‧Detection device

10‧‧‧ grain

11‧‧·score ball

111‧‧‧Lighting column

112‧‧‧Light column

12‧‧‧ Spot probe

13‧‧‧Fiber

14‧‧‧Photodetector

A‧‧‧ projection angle

D1‧‧‧ separation distance

〔this invention〕

2‧‧‧Lighting device

21‧‧·score ball

210‧‧‧reflecting surface

211‧‧‧Lighting column

211a‧‧‧Lighting hole

212‧‧‧Light column

212a‧‧‧Lighting hole

22‧‧‧Support fixture

221‧‧‧ positioning ring

221a‧‧‧Location space

221b‧‧‧ fitting components

222‧‧‧Transparent glass plate

30‧‧‧ Spot probe

L‧‧‧Light-emitting components to be tested

F1‧‧‧Light transmission detection area

F2‧‧‧ opaque reflection zone

θ ‧‧‧Lighting angle

M‧‧‧ sealing element

D2‧‧‧ thickness

1 is a schematic view of a conventional detecting device; FIG. 2 is a schematic perspective view of the light collecting device of the present invention; FIG. 3A is a schematic view showing the operation of the light collecting device of the present invention; and FIG. 3B is a light collecting device of the present invention; Actuation diagram.

The present invention is a light-receiving device capable of increasing the amount and angle of light collection. Referring to Figures 2 and 3A, which is a first preferred embodiment of the present invention, the light-receiving device 2 includes an integrating sphere 21 and a supporting treatment. The configuration of the integrating sphere 21 is a hollow spherical body, and a reflecting surface 210 is evenly coated or formed on the inner wall surface, and a light collecting column 211 and at least one light emitting column 212 are protruded from the outer wall thereof. The number of the light-emitting posts 212 can be adjusted according to the actual detection mode of the light-emitting column 211. A light-receiving hole 211a is defined in the center of the light-receiving column 211, and a light-emitting hole 212a is defined in the center of each of the light-emitting columns 212, and the light-receiving hole 211a and the light-receiving hole 211a are respectively The light exit hole 212a is in communication with the space inside the integrating sphere 21.

The support fixture 22 includes a positioning ring 221 and a light-transmissive glass plate 222. The positioning ring 221 defines a positioning space 221a facing the inner edge of the bottom side of the integrating sphere 21. The positioning space 221a is configured with the light-receiving column. The configuration of the 211 is matched to be sleeved on 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 rotate one end of each of the fitting elements 221b. The other end of the fitting member 221b is urged to the periphery of the light-receiving column 211, and the positioning ring 221 is integrated with the light-receiving column 211; the transparent glass plate 222 is fixed to the positioning ring 221 away from the The top side of the light-receiving column 211 is configured to be transparent to the position corresponding to the light-receiving hole 211a through the positioning ring 221, so that the external light can sequentially pass through the light-transmitting glass plate 222 and the light-receiving hole 211a. Integral ball 21.

Based on years of practical experience, the inventors have found that the conventional detection device has an excessive detection error. The main reason is that in the past, when the detection process was performed, the crystal grains of the LED must be placed on a detection platform. Then, through the one-point measuring device, the crystal grains of the light-emitting diode are driven one by one, and thus the space occupied by the measuring device is the main source of the detection error. Therefore, please refer to FIG. 3A, A design focus of the light-receiving device 2 of the invention is to use the light-transmissive glass plate 222 as a support surface for directly carrying a light-emitting element L to be tested (for example, a crystal grain of a light-emitting diode), so that the test piece is to be tested. The light-emitting element L can pass through the light-transmitting glass plate 222 and closely adhere 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 performing the detection process, the manufacturer can respectively connect a light detector (not shown) on each of the light-emitting columns 212; or install a sealing element M on each of the light-emitting columns 212 (such as a sealing cover or Reflector), since the structure of the photodetector is not the protection focus of the present invention, in the 3A and 3B drawings, only the aspect in which the two sealing elements M are mounted on the integrating sphere 21 is drawn, so as to clearly show the The internal configuration of the integrating sphere 21 is combined with Chen Ming.

Referring to FIG. 2 to FIG. 3B, in the embodiment, the light-receiving device 2 is matched with a point-measuring device (not shown) to detect the light-emitting element L to be tested, and one of the spot-measuring devices is spot-measured. The probe 30 is positioned above the light-receiving device 2 and is movable up and down. Since the spotting probe 30 is disposed in a direction away from the integrating sphere 21 of the supporting fixture 22, the point probe is detected. The footprint of the needle 30 does not affect the accuracy of the light-receiving device 2 in detection. When the spotting probes 30 are electrically connected to the pins of the light-emitting element L to be tested, respectively, the light-emitting elements to be tested L can be electrically driven to generate light, and the light can pass through the light-receiving holes 211a. The light is incident on the integrating sphere 21, and the light is uniformly reflected and diffused by the reflecting surface in the integrating sphere 21 to form a uniform light intensity distribution in the integrating sphere 21, and then through the light exit hole 212a. The light detecting device 21 is configured to detect a very uniform diffused light beam from the light exiting hole 212a, and to detect the light emitting element L to be tested.

In the first preferred embodiment of the present invention, the light-transmissive glass plate 222 faces the other side surface of the light-receiving hole 211a, except that a portion corresponding to the light-emitting element L to be tested is formed at the center. The light detecting area F1 is coated with a light reflecting layer to form an opaque reflecting area F2, and the configuration of the light transmitting detecting area F1 corresponds to the size of the light emitting element L to be tested. In this way, when the spot probe 30 applies a current to the light-emitting element L to be tested, and performs a spot test, the The light generated by the light-emitting element L to be tested is sequentially reflected by the reflecting surface in the integrating sphere 21 after being incident on the integrating sphere 21 through the light-transmitting glass plate 222 and the light-receiving hole 211a. And diffusing, which is reflected by the opaque reflection area F2, is reflected back into the integrating sphere 21, and is further reflected and diffused by the reflecting surface until a uniform light intensity is formed, and is emitted through the light exit hole 212a. Since the integrating sphere 21 is out of the range, the degree of reflection and diffusion light scattered by the light receiving hole 211a can be greatly reduced.

Referring to Figures 1, 2 and 3B, after comparing the conventional detecting device 1 with the light collecting device 2 of the present invention, it is apparent that the light-emitting element L to be tested and the light-detecting device 2 are detected by the light-receiving device 2 The distance between the integrating spheres 21 is only the thickness D2 of the transparent glass plate 222. The thickness D2 is not only far shorter than the spacing distance D1 in FIG. 1 , and the light-transmitting glass plate 222 is attached to the light-receiving column. 211, the light generated by the light-emitting element L to be tested does not need to first pass through the outside air, and then enters the integrating sphere 21, thereby ensuring that the light is not interfered by the outside world and improving the accuracy of the detection. In addition, the light generated by the light-emitting element L to be tested 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-emitting element L to be tested is generated. The light rays are diffused with the light-emitting angle θ after entering the integrating sphere 21, 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. Therefore, the amount of light collected by the integrating sphere 21 can be much better than that of the conventional detecting device. At the same time, it can also solve the problem of the light collection angle.

In particular, the integrating sphere 21 drawn in FIG. 2 has its light-receiving hole 211a formed on the light-receiving column 211. However, in actual application, the light-receiving hole 211a can also be opened directly. It is on the outer wall of the integrating sphere 21 without passing through the light collecting column 211. The operator only needs to design the bottom side of the positioning ring 221 to match the portion of the integrating sphere 21 corresponding to the light receiving hole 211a (for example, an arc-shaped concave surface to be attached to the integrating sphere 21, or The positioning ring 221 can be embedded in one of the integrating balls 21, and can be fixedly fixed to the position of the integrating sphere 21 corresponding to the light receiving hole 211a. In addition, in the first preferred embodiment of the present invention, the positioning ring 221 is passed through the fitting elements 221b, and is urged to the outer edge of the light-emitting column 212, and the light-transmissive glass plate 222 is directly fixed ( For example, the adhesive film is fixed on the top surface of the positioning ring 221. However, in other preferred embodiments of the present invention, the positioning ring 221 and the transparent glass plate 222 are not positioned in the foregoing manner. Limit, the positioning ring 221 can still use the embedded card, screwing, etc., and The light-receiving column 211 is integrated into the body, and the light-transmissive glass plate 222 can also be fixed on the positioning ring 221 by means of a sleeve or a card.

Moreover, in the foregoing embodiment, the light-transmissive glass plate 222 is transmitted through the reflective layer and is divided into the light-transmitting detection area F1 and the opaque reflection area F2. However, the manufacturer can also directly use the different materials to fabricate the light-transmissive glass plate. 222, that is, the manufacturer can use the light-transmitting material to make the light-transmitting detection area F1 on the light-transmissive glass plate 222, and use the opaque reflective material of the whole piece to make the opaque reflection area F2, and thus can also be achieved. The same effect. In addition, in the foregoing embodiment, the material of the reflective layer is the same as the material of the reflective surface 210 of the integrating sphere 21, so as to achieve a better detection effect, but in actual application, the material of the reflective layer can still be The needs of the industry are adjusted.

The above description is only a few preferred embodiments of the present invention, but the technical features of the present invention are not limited thereto, and those skilled in the relevant art can easily think about it after considering the technical content of the present invention. Equivalent changes should not depart from the scope of protection of the present invention.

2‧‧‧Lighting device

21‧‧·score ball

211‧‧‧Lighting column

211a‧‧‧Lighting hole

212‧‧‧Light column

212a‧‧‧Lighting hole

22‧‧‧Support fixture

221‧‧‧ positioning ring

221a‧‧‧Location space

221b‧‧‧ fitting components

222‧‧‧Transparent glass plate

F1‧‧‧Light transmission detection area

F2‧‧‧ opaque reflection zone

Claims (4)

A light collecting device capable of increasing the amount and angle of light collection, comprising: an integrating sphere, a hollow spherical body having a reflecting surface formed on an inner wall surface thereof, a light collecting hole and at least one light emitting light on the outer wall of the integrating sphere a hole, the light-receiving hole and the light-emitting hole are respectively connected to a space in the integrating sphere; and a supporting fixture, comprising a positioning ring and a light-transmissive glass plate, wherein a bottom side configuration of the positioning ring is The configuration of the portion of the integrating sphere corresponding to the light-receiving hole is matched, so that the positioning ring can be fixed on the integrating sphere corresponding to the position of the light-receiving hole, and integrated with the integrating sphere, The light glass plate is fixed on one of the top sides of the positioning ring, so that the light-transmissive glass plate can correspond to the light-receiving hole, and a light-emitting element to be tested is positioned on the back of the light-transmitting glass plate to the light-receiving hole a light-emitting panel and a light-receiving hole are sequentially projected through the light-transmissive glass plate and the light-receiving hole, and are projected into the integrating sphere, and a light detecting device is positioned in the light-emitting hole. After the integrating sphere is uniformly reflected and diffused by the reflecting surface, the light exiting hole is further The projected light detecting means. The light-receiving device of claim 1, wherein the light-transmissive glass plate faces the other side surface of the light-receiving hole, except that a light-transmissive detection area is formed at a portion corresponding to the light-emitting element to be tested at the center; The portions are coated with a light reflecting layer to form an opaque reflecting area, and the configuration of the light transmitting reflecting area corresponds to the size of the light emitting element to be tested. The light-receiving device of claim 2, wherein the light-receiving hole is formed in a central portion of a light-receiving column on the integrating sphere, and the configuration of the light-receiving column and a positioning space of the bottom side of the positioning ring Matching, and the outer edge of the positioning ring a plurality of fitting elements are operatively embedded to allow one end of each of the fitting elements to be rotated when the bottom side of the positioning ring is sleeved onto the light-receiving column, and the other end is urged to the same The periphery of the light-receiving column allows the positioning ring to be closely integrated with the light-receiving column. The light-receiving device of claim 3, wherein the material of the light-reflecting layer on the light-transmissive glass plate is the same as the material of the reflecting surface on the inner wall of the integrating sphere.