CN113467064B - Ultraviolet irradiation device for solar simulator - Google Patents

Abstract

The application discloses an ultraviolet irradiation device for a solar simulator. Comprising: a condenser body, which has a plane non-reflection area at the center and an annular ellipsoid reflection area connected to the edge of the plane non-reflection area; the application specifically designs the condenser body, which has a plane non-reflection area at the center and For the annular ellipsoid reflective area connected to the edge of the plane non-reflective area, the first ring area and the second ring area are arranged alternately on the inner wall of the annular ellipsoid reflective area along the normal direction of the plane non-reflective area, and both have The same first focus, the light source emits light from the first focus, the light is reflected by the first ring area and converged to the second focus, and then reflected by the second ring area and converged to the third focus, so that the light energy is evenly distributed in the two focuses, so that The reflected focused spot is homogenized and the distribution of the focused spot is improved.

Description

An ultraviolet irradiation device for solar simulator

technical field

The present disclosure generally relates to the technical field of spacecraft ultraviolet irradiation test, and in particular relates to an ultraviolet irradiation device for a solar simulator.

Background technique

In the aerospace field, in order to ensure that the spacecraft can work normally in the space environment, it is necessary to conduct a series of space environment simulation tests before launch. Among them, ultraviolet radiation test is one of the key test items. In a vacuum environment, without the protection of the earth's atmosphere, the spacecraft is exposed to ultraviolet radiation for a long time, and many components may be damaged, deformed, and aging, which will affect the operation of the spacecraft. In order to accurately simulate the space ultraviolet radiation environment, corresponding simulation equipment, that is, the ultraviolet radiation source, is needed.

At present, the widely used integrating rod type ultraviolet radiation source usually uses an ellipsoidal condenser through a reflective optical path, and places the light source on one of the focal points of the ellipsoidal surface where the reflecting surface is located. At the focal point, place the center of one end face of the integrating rod at the other focal point at the same time, so that the converging light is uniformly transmitted to the other end face through the integrating rod, and then passes through the optical imaging system to finally emit light that meets the requirements of the ultraviolet radiation source. In order to accelerate the aging experiment, the ultraviolet radiation source usually provides irradiation several times the solar constant, and the imaging mirror group usually forms a multiple-magnified real image, so that the energy density at the integrating rod is many times higher. Therefore, using an ellipsoidal condenser, the center of the incident end of the integrating rod is the focal point where all the energy converges. The energy is too concentrated, which makes the end face of the integrating rod easily damaged. In actual use, tiny dust or flaws will cause the end face of the integrating rod to be damaged by the focused light, which will affect the light transmission effect and reduce the life of the device. Therefore, we propose an ultraviolet irradiation device for solar simulators to solve the above-mentioned concentrated spot distribution. The central area of the end face of the integrating rod bears a huge energy density, which greatly increases the possibility of damage to the end face of the integrating rod. There is fine particle interference on the surface of the end face, and the end face of the integrating rod is easily burnt and invaded by energy, and the output power of the subsequent ultraviolet radiation source is reduced, and the performance is rapidly degraded.

Contents of the invention

In view of the above-mentioned defects or deficiencies in the prior art, it is expected to provide a way to improve the distribution of focused light spots, reduce the probability of damage to the incident end face of the integrating rod, improve the stability and life of the solar simulator system, and be used for solar simulation with a simple structure and easy implementation. Ultraviolet irradiation device of the device.

In a first aspect, the application provides a condenser, comprising:

Condenser body, which has a flat non-reflective area located in the center and an annular ellipsoid reflective area connected to the edge of the flat non-reflective area;

The inner wall of the annular ellipsoid reflective area is alternately provided with a first annular area with a first curvature radius and a second annular area with a second curvature radius along the normal direction of the plane non-reflective area;

The first annular area and the second annular area have the same first focal point;

The light emitted by the light source from the first focal point converges to the second focal point after being reflected by the first ring area, and converges to the third focal point after being reflected by the second ring area.

According to the technical solution provided by the embodiment of the present application, the first focal point, the second focal point and the third focal point are all located in the normal direction of the planar non-reflective area.

According to the technical solution provided in the embodiment of the present application, the diameter of the ring-shaped ellipsoid reflective area near the flat non-reflective area is 66 mm, and the diameter of the side away from the flat non-reflective area is 250 mm.

According to the technical solution provided in the embodiment of the present application, the radius of curvature of the first ring area is 87.2 mm, and the radius of curvature of the second ring area is 87.8 mm.

According to the technical solution provided by the embodiment of the present application, the energy of the light at the second focal point is equal to the energy of the light at the third focal point, and the sum of the two is equal to the total energy of the light emitted by the light source.

In a second aspect, the application provides an ultraviolet irradiation device for a solar simulator, comprising:

Above-mentioned a kind of condenser;

a light source device disposed at the first focal point;

When the light source device emits light, the light is reflected by the first ring area and converged to the second focus, and it is reflected by the second ring area and converged to the third focus; the second The focal point is adjacent to the third focal point, and the second focal point is relatively close to the first focal point;

Integrating rods, the incident end surface of which is located at the midline of the line connecting the second focal point and the third focal point, and the incident end surface is perpendicular to the normal line of the planar non-reflective area.

According to the technical solution provided by the embodiment of the present application, the light source device is a spherical mercury-xenon lamp.

To sum up, the technical solution specifically discloses a specific structure of a condenser lens. The application specifically designs the condenser body, which has a plane non-reflective area located in the center and an annular ellipsoid reflective area connected to the edge of the plane non-reflective area. The direction alternately sets the first ring area and the second ring area, and both have the same first focus, the light source emits light from the first focus, the light is reflected by the first ring area and converges to the second focus, and passes through the second ring area The reflection converges to the third focal point, so that the light energy is evenly distributed in the two focal points, so that the reflected focused spot is uniform, and the distribution mode of the focused spot is improved.

Description of drawings

Other characteristics, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

Figure 1 is a schematic diagram of the power density distribution of the focused spot on the incident end face of the integrating rod in a traditional solar simulator.

Fig. 2 is a structural schematic diagram of a condenser and an ultraviolet irradiation device used in a solar simulator.

Fig. 3 is a schematic diagram of the power density distribution of the focused spot on the incident end face of the integrating rod in the ultraviolet irradiation device.

Fig. 4 is a schematic diagram of the power density distribution curve of the light spot on the exit end face of the integrating rod in the traditional solar simulator.

Fig. 5 is a schematic diagram of the power density distribution curve of the light spot on the exit end surface of the integrating rod in the ultraviolet irradiation device.

Symbols in the figure: 1. condenser body; 2. light source device; 3. integrating rod; 4. first ring area; 5. second ring area; 6. second focus; 7. third focus; 8. incident end face.

Detailed ways

The application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain related inventions, rather than to limit the invention. It should also be noted that, for ease of description, only parts related to the invention are shown in the drawings.

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

Embodiment one

Please refer to the structural representation of a condenser provided by the application shown in Figure 2, including:

Condenser body 1, which has a flat non-reflective area located at the center and an annular ellipsoid reflective area connected to the edge of the flat non-reflective area;

The inner wall of the annular ellipsoid reflective area is alternately provided with a first ring area 4 with a first radius of curvature and a second ring area 5 with a second radius of curvature along the normal direction of the planar non-reflective area;

The first ring area 4 and the second ring area 5 have the same first focal point;

The light emitted by the light source from the first focal point converges to the second focal point 6 after being reflected by the first ring region 4 , and converges to the third focal point 7 after being reflected by the second ring region 5 .

In the present embodiment, as shown in Figure 2, the condenser body 1 has a plane non-reflective area positioned at the center and an annular ellipsoid reflective area connected to the edge of the plane non-reflective area; the plane non-reflective area has no reflective effect on light ; The first ring area 4 and the second ring area 5 are arranged alternately on the inner wall of the annular ellipsoid reflective area along the normal direction of the plane non-reflective area, for reflecting the light emitted by the light source;

Here, the first ring area 4 and the second ring area 5 have the same first focal point, which is equivalent to the focus placed by the light source in a conventional condenser. The light source can emit light from the first focus, and the light is reflected by the first ring area 4 Converging to the second focal point 6, the light is converged to the third focal point 7 through the reflection of the second ring area 5, and the light is respectively converged at the two focal points, and the energy of the light at the second focal point 6 is the same as that of the third focal point 7 The energy of the light at is equal, and the sum of the two is equal to the total energy of the light emitted by the light source device 2, so that the reflected focused light spot is uniform.

And, the first focal point, the second focal point 6 and the third focal point 7 are all located in the normal direction of the plane non-reflective area;

Further, each ring area is polished so that the same ring area has a uniform degree of curvature, that is, each first ring area 4 has the same first radius of curvature; each second ring area 5 has the same first radius of curvature; Two curvature radii; so that when the ring areas with the same curvature radius reflect the light, the light can be converged to the corresponding same focal point.

Further, the arrangement of the first ring area 4 and the second ring area 5, for example, as shown in FIG. Adjacent to the first ring area, the two are arranged alternately in the normal direction of the planar non-reflective area.

Embodiment two

Please refer to the structural representation of a kind of ultraviolet radiation device for solar simulator provided by the present application shown in Fig. 2, including:

A kind of condenser lens among the embodiment one;

a light source device 2, which is arranged at the first focal point;

When the light source device 2 emits light, the light is reflected by the first ring area 4 and converged to the second focus 6 , and it is reflected by the second ring area 5 and converged to the third focus 7 ; The second focus 6 is adjacent to the third focus 7, and the second focus 6 is relatively close to the first focus;

The incident end surface 8 of the integrator rod 3 is located at the midline of the line connecting the second focal point 6 and the third focal point 7, and the incident end surface 8 is perpendicular to the normal of the plane non-reflective area.

In this embodiment, taking the traditional ellipsoidal condenser as an example, the light source is placed on one of the focal points of the ellipsoidal surface where the reflecting surface is located, and the light emitted by the light source converges to the other focal point after being reflected. The center is placed at another focal point, so that the converging light is uniformly transmitted to the other end surface through the integrating rod, and then passes through the optical imaging system, and finally emits light that meets the requirements of the ultraviolet radiation source. Among them, the parameters of the ellipsoidal condenser are as shown in the table As shown in 1, its caliber is 250mm, its bottom hole diameter is 66mm, its curvature radius is 87.5mm, and its conical surface coefficient is -0.5625;

Table 1 Traditional condenser parameters

As shown in Figure 1, the distribution of the power density of the focused spot on the incident end face of the integrating rod in the traditional solar simulator is shown when the light is transmitted by the traditional condenser. The density peak is larger.

Based on the traditional condenser, the shape of the reflective surface of the condenser is redesigned, and on the basis of retaining the original light transmission function, multiple structures are used to replace the traditional single structure;

As shown in Figure 2, the present embodiment has a kind of converging mirror described in Embodiment 1; the light source device 2 is arranged at the first focal point as a light source; here, the type of the light source device 2 is, for example, a spherical mercury-xenon lamp ;

Integrator rod 3, its incident end surface 8 is set at the midline of the line connecting the second focal point 6 and the third focal point 7, and it is set perpendicular to the normal of the plane non-reflective area, passing through the first ring area 4 and the second ring area 5 The reflected light enters the integrating rod 3 from the incident end face 8, and is reflected multiple times by the integrating rod 3, finally forming a uniform light source on its light emitting end face;

Specifically, as shown in Table 2, the selection of the diameter of the condenser and the diameter of the bottom hole of the present embodiment are consistent with the parameters of the traditional condenser, the first radius of curvature is selected as 87.2mm, and the second radius of curvature is selected as 87.8mm;

Table 2 Condenser parameters of this embodiment

Utilize the spherical mercury-xenon lamp to emit divergent light, the light is reflected by the first ring area 4 and converges to the second focus 6, and it is reflected by the second ring area 5 and converges to the third focus 7, as shown in Figure 2 at this time, the first The second focal point 6 is adjacent to the third focal point 7, and the second focal point 6 is relatively close to the first focal point; the light at the two focal points enters the integrating rod 3 from the incident end face 8, and the reflected light is processed by the integrating rod 3 for many times Reflection, and finally form a uniform light source on its light-emitting end surface; the uniform light source is then imaged to the lighting surface at a specified distance through the imaging mirror, and finally forms a uniform light spot that conforms to ultraviolet radiation.

Moreover, as shown in Figure 3, in this solution, the distribution of the focused light spots on the incident end face 8 of the integrator rod 3 is more uniform, and the peak power density is also lower. Under the condition that the energy transmission efficiency remains unchanged, the focused light spots are evenly distributed to avoid Point stick 3 damaged.

As shown in Fig. 4 and Fig. 5, when using the traditional condenser and the condenser of this solution to simulate the ultraviolet radiation environment respectively, the output power density distribution of the exit end face of the integrating rod 3 in the two simulation tests is basically the same. It can be seen that, The redesigned condenser and ultraviolet irradiation device of this scheme can realize the original light transmission. Therefore, the condenser and ultraviolet irradiation device can improve the light transmission process, evenly distribute the focused spot, and reduce the damage rate of the integrating rod while ensuring energy transmission. efficiency.

Further, as shown in Table 3, compared with the traditional condenser, the peak power density of the spot on the incident end face of the integrating rod of this scheme decreases by about 40%; the spot diameter becomes larger, and the spot diameter increases by about 56% at 50% power density, reaching Therefore, this kind of condenser lens structure and the ultraviolet irradiation device used in the solar simulator can reduce the damage probability of the integrating rod and effectively improve the overall stability of the system.

Table 3 Comparison of the focus spot of the traditional ellipsoidal condenser and the condenser of this solution

The above description is only a preferred embodiment of the present application and an illustration of the applied technical principle. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to the technical solution formed by the specific combination of the above-mentioned technical features, but should also cover the technical solution formed by the above-mentioned technical features without departing from the inventive concept. Other technical solutions formed by any combination of or equivalent features thereof. For example, a technical solution formed by replacing the above-mentioned features with technical features with similar functions disclosed in this application (but not limited to).

Claims (5)

1. An ultraviolet irradiation apparatus for a solar simulator, comprising:

a condenser lens, comprising:

a condenser body (1) having a planar non-reflection region at the center and an annular ellipsoidal reflection region connected to the edge of the planar non-reflection region;

a first annular region (4) with a first curvature radius and a second annular region (5) with a second curvature radius are sequentially and alternately arranged on the inner wall of the annular ellipsoidal reflecting region along the normal direction of the planar non-reflecting region;

the first annular region (4) and the second annular region (5) have the same first focus;

light emitted from the first focal point is converged at a second focal point (6) through reflection of the first annular region (4), and is converged at a third focal point (7) through reflection of the second annular region (5);

the light energy at the second focus (6) is equal to the light energy at the third focus (7), and the sum of the two is equal to the total light energy emitted by the light source;

a light source device (2) disposed at the first focal point;

when the light source device (2) emits light, the light is reflected and converged to the second focus (6) through the first annular region (4), and is reflected and converged to the third focus (7) through the second annular region (5); the second focal point (6) is arranged adjacent to the third focal point (7), and the second focal point (6) is relatively close to the first focal point;

and the incidence end surface (8) of the integrating rod (3) is positioned at the central line of the connecting line of the second focus (6) and the third focus (7), and the incidence end surface (8) is perpendicular to the normal line of the plane non-reflection area.

2. An ultraviolet irradiation device for a solar simulator according to claim 1, characterized in that the first focus, the second focus (6) and the third focus (7) are all located in the normal direction of the planar non-reflective area.

3. An ultraviolet irradiation device for a solar simulator as claimed in claim 1, wherein the diameter of the side of the annular ellipsoidal reflective region close to the planar non-reflective region is 66mm, and the diameter of the side thereof remote from the planar non-reflective region is 250mm.

4. A uv irradiation device for a solar simulator according to claim 3, wherein the first radius of curvature is 87.2mm and the second radius of curvature is 87.8mm.

5. An ultraviolet irradiation device for a solar simulator according to claim 1, characterized in that the light source device (2) is a spherical mercury xenon lamp.

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