Dodging device

Abstract

A dodging device belongs to the field of solar simulator components and is characterized by comprising a light source and a box body, openings are formed in the two ends of the box body; the light source is arranged at one end of the box body; the inner wall of the other end of the box body is provided with a specular reflection area and a non-specular reflection area. According to the dodging device, an existing dodging device is improved, the box body part of the dodging device is arranged to be the specular reflection area and the non-specular reflection area, the direction of light beams which cannot directly irradiate a test area is changed through the specular reflection area, the light beams irradiate the edge of the test area, and therefore irradiation distribution with the strong center and the weak periphery is neutralized, and the good dodging effect is achieved. The high-quality light irradiation with the uniformity smaller than 1% can be obtained within the light-emitting intercept range of 10-100 cm, meanwhile, the high-quality light irradiation device has the high light energy utilization rate, and is simple in structure and suitable for application and popularization.

Description

Technical Field

[0001] The utility model belongs to the field of solar simulator components, and particularly relates to a light homogenizing device. Background Art

[0002] Irradiance uniformity refers to the degree to which the irradiance everywhere tends to be consistent within the test area. In many fields, especially in the photovoltaic field, for example, in a solar simulator, the A-level requirement is generally met when the irradiance uniformity is less than 2%. People usually hope that as much light as possible emitted from the light source reaches the test area, so that the light energy utilization rate is higher and the load of the light source is smaller. However, when the light energy utilization rate is high, the irradiance uniformity is generally poor; when the irradiance uniformity is good, the light energy utilization rate is generally low.

[0003] Existing various light homogenizing devices have made many effective improvements in light homogenization. For example, the prior art CN201420491463.8 discloses an LED array light source light homogenizing device that can achieve a good light homogenizing effect. However, for a light homogenizing device with a similar structure, during use, the sample to be tested needs to be placed very close to the light exit to ensure irradiance uniformity. When the light exit intercept (i.e., the distance between the sample to be tested and the light exit) is greater than 5 cm, the irradiance uniformity will become very poor, thus affecting subsequent tests such as the test of solar cells. Summary of the Invention

[0004] The utility model aims to solve the above problems and provides a light homogenizing device with a simple structure and capable of effectively extending the light exit intercept.

[0005] The light homogenizing device of the utility model includes a light source and a box body; both ends of the box body are set to be open; the light source is arranged at one end of the aforementioned box body; the inner wall at the other end of the box body is set as a specular reflection area and a non-specular reflection area.

[0006] Set the other end of the box body as the light exit, set the test area below the light exit, and the light exit intercept is 10 - 100 cm. For a solar simulation device, in the absence of a box body, the light source will directly irradiate the test area, forming an irradiance distribution with strong center and weak periphery; after setting the box body, a part of the light of the light source can be compensated for the periphery of the test area after being reflected inside the box body, which has a certain improvement. However, when the entire inner wall of the box body is a non-specular reflection area, an irradiance distribution with strong center and weak periphery will also be formed; by setting both a specular reflection area and a non-specular reflection area inside the box body, the specular reflection area changes the direction of the light beam that cannot directly irradiate the test area and irradiates the edge of the test area, thereby neutralizing the irradiance distribution with strong center and weak periphery and achieving a better light homogenizing effect.

[0007] Furthermore, for the light homogenizing device of the present utility model, the specular reflection areas are symmetrically arranged on the inner wall of the aforementioned box body, which is conducive to forming symmetric reinforcement; the non-specular reflection areas are distributed along the light beam direction of the light source, and better uniformity effect can be achieved by distributing along the light beam direction of the light source.

[0008] Furthermore, for the light homogenizing device of the present utility model, the non-specular reflection areas cover and are arranged on the aforementioned specular reflection areas. The processing and preparation efficiency of the light homogenizing device can be improved by the covering arrangement method, and the processing cost can be saved.

[0009] Furthermore, for the light homogenizing device of the present utility model, a light mixing plate is arranged between the light source and the box body. By arranging the light mixing plate, the light beam emitted by the light source first passes through the light mixing plate and then enters the box body. The light mixing plate can irregularly change the direction of the transmitted light, thereby achieving a better light homogenizing effect.

[0010] Furthermore, for the light homogenizing device of the present utility model, the light source is an LED lamp.

[0011] Furthermore, for the light homogenizing device of the present utility model, the light source is a xenon lamp; the xenon lamp is provided with a lamp box; the xenon lamp is located inside the lamp box; a negative pressure source is arranged at the top of the lamp box. By arranging the negative pressure source, the cooling air can enter from below the lamp box, pass through the xenon lamp and then be discharged from the upper opening, realizing rapid cooling.

[0012] Furthermore, for the light homogenizing device of the present utility model, a filter is arranged between the light source and the box body; by arranging the filter, the spectral requirements during the test can be conveniently realized, and the applicable range can be improved.

[0013] Furthermore, for the light homogenizing device of the present utility model, the longitudinal section of the box body is quadrilateral; the side length range of the quadrilateral is 20 - 100 cm; the length range of the box body is 20 - 100 cm. The box body of the light homogenizing device within this size range is convenient for installation and cooperation with common sorting machines, and can also meet the requirement of illuminating a 21X21 mm solar cell.

[0014] Furthermore, for the light homogenizing device of the present utility model, there are several box bodies; the box bodies are arranged in sequence; the light emitted by the light source can be gathered by multiple box bodies arranged in sequence, thereby obtaining a higher light energy utilization rate.

[0015] Furthermore, for the light homogenizing device of the present utility model, a hollowed-out part is arranged at the other end of the box body. The distance between the hollowed-out part and the light source is greater than half of the distance between the hollowed-out part and the test area, and the distance between the hollowed-out part and the test area is greater than 15 cm.

[0016] The light homogenizing device described in the present utility model improves the existing light homogenizing device. The box body part of the light homogenizing device is set as a specular reflection area and a non-specular reflection area. The light beam that cannot directly irradiate the test area is redirected through the specular reflection area and irradiated to the edge of the test area, thereby neutralizing the irradiation distribution with strong center and weak periphery and achieving a better light homogenizing effect. High-quality light irradiation with a uniformity less than 1% can be obtained within the light output intercept range of 10 - 100 cm. At the same time, it has a high light energy utilization rate, a simple structure, and is suitable for popularization and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the light homogenizing device described in the first embodiment;

[0018] Figure 2 is a schematic diagram of the position of the non-specular area inside the light homogenizing device described in the first embodiment;

[0019] Figure 3 is a schematic structural diagram of the light homogenizing device described in the second embodiment;

[0020] Figure 4 is a schematic structural diagram of the hollowed-out part described in the second embodiment;

[0021] Wherein, 1 - negative pressure source, 2 - light source, 3 - lamp box, 4 - filter, 5 - light mixing plate, 6 - box body, 7 - light beam, 8 - test area, 9 - hollowed-out part, 10 - non-specular reflection area, 11 - specular reflection area. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The light homogenizing device described in the present utility model will be described in detail below with reference to the drawings and embodiments.

[0023] Embodiment 1

[0024] This embodiment discloses a light homogenizing device, as Figure 1 shown, which includes a light source 2 and a box body 6; both ends of the box body 6 are set as openings. In the disclosed embodiment of the present invention, the periphery of the inner wall of the box body 6 is made of a specular reflection plate, and in this embodiment, the specular reflection plate is a specular aluminum plastic plate. In specific applications, the specular aluminum plastic plate can be replaced with an aluminum plate or a mirror according to needs. In this embodiment, the upper opening of the box body 6 corresponds to the light source 2, and the lower opening is set as the light output port. The test area 8 is arranged below the light output port, and the light output intercept in this embodiment is 46 cm.

[0025] In the disclosed embodiment of the present invention, the box body 6 is a quadrilateral stretching body, the length of the box body 6 (along the light beam direction) is 30 cm; the longitudinal section of the box body 6 (perpendicular to the light beam direction) is a square, and the side length of the square is 40 cm.

[0026] In the embodiments of the present disclosure, the specular reflection area 11 on the inner wall of the box body 6 is transformed into a non-specular reflection area 10 on a part of the lower inner wall of the box body 6 by means of spraying, mounting, grinding, etc., so as to realize the coexistence of the specular area and the non-specular area and adjust the uniformity. The size and setting position of the non-specular area can be determined according to the irradiation distribution required in specific applications. The proportion of the non-specular reflection area 10 in the area of the specular reflection plate ranges from 0 to 70%. In the embodiments of the present disclosure, the sizes and positions of the non-specular reflection areas 10 on the four inner walls of the box body 6 are as Figure 2 shown, and at the same time, the non-specular reflection area 10 is distributed along the light beam direction of the light source 2. Under the action of the box body 6, the irradiance at the four edges of the test area 8 is stronger than that at the center. The non-specular reflection area 10 can be used to adjust the compensation intensity for the edge area, so as to achieve irradiation uniformity. At the same time, according to the sizes and relative positions of the box body 6, the light source 2, and the test surface, the position of the specular reflection area 11 can be determined through simple geometric optical design.

[0027] The non-specular reflection area 10 can be a black plate or a diffuser plate with a high reflectivity. These two kinds of plates are mounted on the specular reflection area 11 to form the non-specular reflection area 10. In the embodiments of the present disclosure, a flannelette white cloth with an adhesive backing is used, which is inexpensive, easy to cut and adjust the position, and has a relatively high light energy utilization rate. The flannelette white cloth is mounted on the specular reflection area 11 to change part of the specular reflection area 11 into the non-specular reflection area 10.

[0028] At the same time, in the embodiments of the present disclosure, the light source 2 uses an arc xenon lamp because its spectrum is close to sunlight and its power is large enough; when other halogen lamps or LED lamps are used as needed, the method is similar. When using an LED lamp, the filter 4 does not need to be used.

[0029] At the same time, in the embodiments of the present disclosure, in order to improve the irradiation effect, a light mixing plate 5 is further provided between the upper opening of the box body 6 and the light source 2. In this embodiment, the light mixing plate 5 uses a frosted glass plate. In order to enhance the edge of the box body 6 on the test area 8, in this embodiment, the upper opening of the box body 6 is set smaller than the lower opening, so that the box body 6 forms a flared opening, which is beneficial to the emission of the internal light 7. In specific applications, the size of the lower opening can be fixed, and the irradiation distribution can be adjusted by adjusting the size of the upper opening of the box body 6.

[0030] When performing uniform illumination adjustment, the light beam emitted by the light source 2 disposed at the upper end of the uniform illumination device housing 6 first enters the housing 6 through the light mixing plate 5. The light mixing plate 5 can irregularly change the direction of the transmitted light. In the prior art, when there is no housing 6, the light source 2 directly irradiates the test area 8, resulting in an irradiation distribution with strong center and weak periphery. In the uniform illumination device of this embodiment, a part of the light entering the housing 6 directly irradiates the test area 8, and at the same time, the light beam that cannot directly irradiate the test area 8 is redirected through the specular reflection area 11 and irradiates the edge of the test area 8, thereby neutralizing the irradiation distribution with strong center and weak periphery that appears in the existing uniform illumination device and achieving a better uniform illumination effect.

[0031] Embodiment 2

[0032] This embodiment discloses a uniform illumination device, as Figure 3 shown, including a light source 2 and a housing 6. The inner wall of the housing 6 is provided with a specular reflection area 11 and a non-specular reflection area 10. Different from Embodiment 1, a hollow member 9 is further provided. In the embodiment of the present disclosure, the light source 2 is an arc xenon lamp, and the xenon lamp is provided with a lamp box 3. The lower end of the lamp box 3 is provided with an opening, and the light source 2 is disposed inside the lamp box 3, near the upper end. The lamp box 3 has an opening above, and a negative pressure source 1 is provided. In this embodiment, the negative pressure source 1 is a fan. The cooling air enters from the opening at the lower end of the lamp box 3, passes through the xenon lamp, and is discharged from the opening above to achieve cooling, so that the light source 2 can obtain good heat dissipation.

[0033] In the embodiment of the present disclosure, a diffuser plate is disposed at the opening position of the lamp box 3. In this embodiment, the diffuser plate is a frosted glass having the same size as the opening of the lamp box 3; as is commonly used in the prior art in this industry, there are several layers of optical films on the frosted glass for spectral selection of specific spectra. The diffuser plate in this embodiment has the functions of both light diffusion and a filter 4 at the same time; the filter 4 is used to perform spectral screening on the light emitted by the light source 2 to make the spectrum meet certain requirements; the diffuser plate is used to diffuse and mix the light of the light source 2 to avoid the influence of the shape of the light source 2 on the irradiation distribution of the test area 8.

[0034] In the embodiment of the present disclosure, a housing 6 is disposed at the lower end of the lamp box 3. The upper end of the housing 6 is provided with an opening, and the light source 2 is disposed at the upper end of the housing 6; the lower end of the housing 6 is provided with an opening. In the embodiment of the present disclosure, a hollow member 9 is disposed at the opening at the lower end of the housing 6. It should be noted that in specific applications, several similar housings 6 can be sequentially added below the housing 6 as needed. The structure of the multi-layer nested housing 6 can make the optical path and the air duct near the light source 2 not too wide, which is convenient for adding relevant optical devices and heat dissipation of the light source 2.

[0035] In the embodiments of the present disclosure, the box body 6 or multiple sequentially arranged box bodies 6 can converge the light emitted by the light source 2, thereby obtaining a higher light energy utilization rate, and the mirror reflection area 11 in the inner wall of the box body 6 can make the light irradiation in the test area 8 more uniform by reflecting part of the light rays 7.

[0036] In the embodiments of the present disclosure, as Figure 4 shown, the hollowed-out part 9 is in a square shape with a hole in the middle and is made of frosted acrylic board. After the light beam of the light source 2 passes through the hollowed-out part of the square shape, a bright light spot is formed in the test area 8, and the irradiation distribution is strong in the center and weak around; after the middle circle is projected by the light source 2, a dark spot is formed in the central area of the test area 8, and after the cross-shaped part is projected by the light source 2, a cross-shaped dark spot is formed in the central area of the test area 8. The above two dark spots are superimposed on the bright light spot, and finally uniform irradiation is formed.

[0037] In the embodiments of the present disclosure, the hollowed-out part 9 is located between the light source 2 and the test area 8. In the embodiments of the present disclosure, the distance between the hollowed-out part 9 and the light source 2 is 40 cm, and the distance between the hollowed-out part 9 and the test area 8 is 50 cm. The projection of the hollowed-out part on the hollowed-out part 9 by the light source 2 intersects with the test area 8; through the setting of the hollowed-out part 9, the irradiation uniformity of the test area 8 is further improved.

[0038] In specific applications, the hollowed-out part 9 can be set to include a transparent area and an opaque area; after the light beam emitted by the light source 2 passes through the transparent area, the direction of the light ray 7 does not change, and after the light beam passes through the opaque area, the direction of the light ray 7 will change, thereby changing the distribution of the light beam in the test area 8, and finally realizing uniform irradiation. In specific applications, a combination of various (such as circular, cross-shaped, elliptical, etc.) shaped hollowed-out parts 9 can also be used to form different irradiation distributions in the test area 8 and achieve irradiation uniformity.

Claims

1. A light homogenizing device, characterized in that: Including light source and cabinet; Both ends of the box are set to be openings; The light source is arranged at one end of the aforementioned box; The inner wall at the other end of the box is configured as a mirror reflection area and a non-mirror reflection area; The mirror reflection areas are symmetrically arranged on the inner wall of the box; and the non-mirror reflection areas are distributed along the light beam direction of the light source.

2. The light homogenizing device according to claim 1, characterized in that: The non-mirror reflection area is arranged to cover the aforementioned mirror reflection area.

3. The light homogenizing device according to claim 2, characterized in that: A light mixing plate is arranged between the light source and the box body.

4. The light homogenizing device according to claim 2, characterized in that: The light source is an LED lamp.

5. The light homogenizing device according to claim 2, characterized in that: The light source is a xenon lamp; the xenon lamp is provided with a lamp box; the xenon lamp is located in the lamp box; a negative pressure source is provided on the top of the lamp box.

6. The light homogenizing device according to claim 5, characterized in that: A filter is arranged between the light source and the box.

7. The light homogenizing device according to claim 4 or 6, characterized in that: The longitudinal section of the box body is a quadrilateral; the side length of the quadrilateral ranges from 20 to 100 cm; and the length of the box body ranges from 20 to 100 cm.

8. The light homogenizing device according to claim 4 or 6, characterized in that: The boxes include a plurality of boxes; the boxes are arranged in sequence.

9. The light homogenizing device according to claim 8, characterized in that: The other end of the box body is provided with a hollow piece.

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