WO2011151974A1 - Artificial sunlight radiating apparatus - Google Patents

Abstract

Provided is an artificial sunlight radiating apparatus which can provide an extended range of radiation without optical redesign. The artificial sunlight radiating apparatus is configured to include a plurality of artificial sunlight radiating units (1A, 1B) which each accommodate an artificial sunlight radiating box (6) for emitting light through an upper face (6B) and a lower face (6A). The unit (1A, 1B) has a reflector (8) located opposite to the lower face (6A) of the artificial sunlight radiating box (6) to irradiate a radiated face (10A) located opposite to the upper face (6B) of the artificial sunlight radiating box (6) with reflected light and direct light, the reflected light having been reflected on the reflector (8), the direct light having been emitted through the upper face (6B) of the artificial sunlight radiating box (6). The artificial sunlight radiating units (1A, 1B) are arranged side by side. Between the artificial sunlight radiating units (1A, 1B), there is disposed a light shield plate (130) which shields leakage of light through the side of each of the artificial sunlight radiating units (1A, 1B), with a gap (δ) formed between an upper end (131) of the light shield plate (130) and the radiated face (10A). A portion of the radiated face (10A) that is located at the boundary between the artificial sunlight radiating units (1A, 1B) is irradiated through the gap (δ) with beams of light from each of the artificial sunlight radiating units (1A, 1B), the beams overlapping each other.

Description

Simulated solar irradiation device

The present invention relates to a simulated solar light irradiation apparatus that irradiates a surface to be irradiated with simulated sunlight.

Pseudo-sun that irradiates the irradiated surface of solar energy equipment with simulated sunlight that reproduces the emission spectrum of natural sunlight for performance measurement and accelerated degradation tests of various solar energy equipment represented by solar cells A light irradiation device (also called a solar simulator) is known.
In this type of simulated sunlight irradiation device, a light source such as a xenon lamp is installed in a box, an optical box is provided on the radiation surface of the box to emit simulated sunlight, and from this irradiation box A reflection surface that reflects the radiated pseudo-sunlight, and irradiates the irradiated surface with both the direct light directly emitted from the light source and the reflected light reflected by the reflection surface (for example, Patent Document 1). reference).

JP 2002-296319 A

By the way, when trying to expand the irradiation range by providing a plurality of straight tube type light sources so as to be compatible with a large area solar cell, the shape and arrangement of the reflecting surface should be adjusted according to the plurality of light sources. There is a problem that the change must be made and the change takes time.
Further, it is conceivable that an optical system having a light source and a reflecting surface is used as one pseudo-sunlight irradiation unit, and a plurality of pseudo-sunlight irradiation units are arranged to expand the irradiation range. However, by simply arranging a plurality of simulated sunlight irradiation units, the light from adjacent simulated sunlight irradiation units is combined, and the illuminance is high at the irradiated surface located near the boundary of the simulated sunlight irradiation units. turn into. In particular, when using a relatively small pseudo-sunlight irradiation unit whose distance from the light source to the irradiated surface is about several tens of centimeters, the incident angle of the light incident on the irradiated surface is widened. There is a problem that more light from the sunlight irradiation unit is synthesized, and it is difficult to adjust the illuminance unevenness of the irradiated surface.
This invention is made | formed in view of the situation mentioned above, and it aims at providing the simulated sunlight irradiation apparatus which can expand an irradiation range, without performing optical design again.

In order to achieve the above object, the present invention is a unit containing a simulated sunlight irradiation box that emits light from the upper surface and the lower surface, and a reflective surface is provided at a position opposite to the lower surface of the simulated sunlight irradiation box. The simulated sunlight that irradiates the illuminated surface provided at the opposite position of the upper surface of the simulated sunlight irradiation box with the reflected light reflected upward by the reflecting surface and the direct light radiated from the upper surface of the simulated sunlight irradiation box. While providing a plurality of irradiation units, while arranging each simulated sunlight irradiation unit side by side, while arranging a light shielding plate that shields light leaking to the side of each simulated sunlight irradiation unit between the simulated sunlight irradiation units, A gap portion is formed between the upper end portion of the light shielding plate and the irradiated surface, and each pseudo-thickness is passed through the gap portion at a position of the irradiated surface located at a boundary portion between the simulated solar light irradiation units. And irradiating overlapping the irradiation light of the light irradiation unit.

The simulated sunlight irradiation box may have a linear light source, and each of the simulated sunlight irradiation units may be arranged so that the light sources are arranged in parallel.

In the above-described configuration, the auxiliary light that reflects incident light toward the irradiated surface between the simulated solar irradiation box and the irradiated surface is located on the side of the simulated sunlight irradiation unit. A reflective surface may be arranged.
This specification includes all the contents of Japanese Patent Application No. 2010-127518 filed on June 3, 2010.

According to the present invention, a plurality of simulated sunlight irradiation units are arranged side by side, and between the simulated sunlight irradiation units, a light shielding plate that shields light leaking to the side of each simulated sunlight irradiation unit is disposed. It is possible to suppress an increase in illuminance on the irradiated surface due to synthesis of irradiation light of each pseudo-sunlight irradiation unit.
Moreover, a gap portion is formed between the upper end portion of the light shielding plate and the irradiated surface, and each pseudo-sunlight irradiation unit is passed through the gap portion at a position of the irradiated surface located at the boundary portion between the simulated solar light irradiation units. Therefore, it is possible to suppress a decrease in illuminance due to the provision of the light shielding plate at the irradiated surface located at the boundary portion between the pseudo solar light irradiation units. Thereby, an irradiation range can be expanded without performing optical design of a pseudo-sunlight irradiation unit again.

FIG. 1 is a longitudinal sectional view schematically showing a configuration of a simulated solar light irradiation apparatus according to the first embodiment of the present invention. FIG. 2 is a plan view showing the simulated sunlight irradiation device. FIG. 3 is a cross-sectional view showing the configuration of the simulated sunlight irradiation device. FIG. 4 is a longitudinal sectional view schematically showing the configuration of the transmitted light amount adjustment unit. FIG. 5 is a plan view schematically showing the configuration of the transmitted light amount adjustment unit. FIG. 6 is a diagram schematically showing a cross section taken along line I-I ′ shown in FIG. 5. FIG. 7 is a diagram showing the result of simulating the light distribution of the pseudo-sunlight irradiation device, (A) is a diagram showing the illuminance distribution on the irradiated surface, and (B) is the average in the width direction of the irradiated surface. It is a graph which shows illumination intensity, (C) is a graph which shows the average illumination intensity of the length direction of a to-be-irradiated surface. FIG. 8 is a longitudinal sectional view schematically showing the configuration of the simulated solar light irradiation apparatus according to the second embodiment of the present invention. FIG. 9 is a plan view showing the simulated sunlight irradiation device. FIG. 10 is a cross-sectional view showing the configuration of the simulated sunlight irradiation device. FIG. 11 is a longitudinal sectional view showing the right half of the right-side simulated sunlight irradiation unit. FIG. 12 is a diagram showing the configuration of the light diffusing member, (A) is a longitudinal sectional view schematically showing the simulated sunlight irradiation unit together with the enlarged light diffusing member, and (B) is the irradiated surface side. It is a figure which shows the light-diffusion member seen from. FIG. 13 is a diagram showing measurement results of illuminance unevenness on the irradiated surface, (A) is a diagram showing illuminance distribution on the irradiated surface, and (B) is a graph showing illuminance in the width direction of the irradiated surface. (C) is a graph showing the illuminance in the length direction of the irradiated surface.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<First Embodiment>
FIG. 1 is a longitudinal sectional view schematically showing the configuration of the simulated solar light irradiation apparatus 100 according to the first embodiment. In FIG. 1, W indicates the width direction, and H indicates the height direction.
The simulated sunlight irradiation device 100 includes a plurality (two in this embodiment) of simulated sunlight irradiation units 1A and 1B, and each of the simulated sunlight irradiation units 1A and 1B combines a plurality of square members 2 in a lattice shape. The frame 4 has a length of about 1.6 m (meters), a width of about 0.9 m, and a height of about 0.8 m, for example. Each of the three side surfaces (sides) excluding one side surface (side) in the length direction of the frame body 4 is covered with a shielding plate 5 to prevent external light from entering.

In each of the simulated sunlight irradiation units 1A and 1B, a simulated sunlight irradiation box 6 that emits simulated sunlight is provided between the side surfaces facing each other in the length direction of the frame body 4. Each of the simulated sunlight irradiation units 1A and 1B has a reflecting surface 8 disposed so as to be opposed to the lower surface 6A of the simulated sunlight irradiation box 6, and is irradiated by the irradiated object 10 disposed so as to be opposed to the upper surface 6B. The surface 10 </ b> A (for example, a solar cell panel) is illuminated with direct light from the simulated sunlight irradiation box 6 and reflected light from the reflecting surface 8. Further, since the irradiated surface 10A closes the upper surface of the frame body 4, the entry of external light from the upper surface is prevented.

FIG. 2 is a plan view showing the simulated sunlight irradiation apparatus 100, and FIG. 3 is a cross-sectional view showing the configuration of the simulated sunlight irradiation apparatus 100. In FIG. 3, X indicates the length direction.
In the simulated sunlight irradiation box 6, as shown in FIGS. 2 and 3, one straight tube type lamp (light source) 22 is arranged along the simulated sunlight irradiation box 6 to form a linear light source. ing. These lamps 22 are, for example, xenon flash lamps having a strong continuous spectrum over a wide wavelength region from the ultraviolet region to the visible region to the infrared region. Terminal blocks 40 are disposed at both ends of the lamp 22.

As shown in FIG. 1, the simulated sunlight irradiation box 6 includes a pair of long plate-like side frames 24 that form both side surfaces along the longitudinal direction, an upper surface optical filter 26 that forms an upper surface 6B, and a lower surface 6A. And a metal fitting (not shown) for assembling the side frame 24, the upper surface optical filter 26, and the lower surface optical filter 27. The side frame 24 is formed of a light shielding material, or a light shielding material for preventing light transmission is added or applied thereto.

Each of the upper optical filter 26 and the lower optical filter 27 is a so-called air mass filter that approximates the emission spectrum of the radiated light to sunlight by cutting the infrared wavelength region from the radiated light of the lamp 22, and is a dielectric multilayer filter. It is comprised using. Further, as shown in FIG. 1, each of the upper optical filter 26 and the lower optical filter 27 has two plate-shaped filter materials each having a mountain shape so that the incident angle of incident light is as close to vertical as possible to suppress the wavelength shift of transmitted light. (Tanigata) is engaged.
The simulated sunlight irradiation box 6 is housed in a lamp house 7 formed of a material that does not modulate the spectrum of simulated sunlight emitted by the simulated sunlight irradiation box 6.

As shown in FIG. 1, the reflecting surface 8 reflects the simulated sunlight from the lower surface 6A of the simulated sunlight irradiation box 6 and holds the reflecting plate 30 that irradiates the irradiated surface 10A of the irradiated body 10 in a tiltable manner. The plurality of reflecting devices 32 are configured.
The irradiated body 10 is placed on the sample support frame 12 attached on the frame body 4 so that the irradiated surface 10A is separated from the simulated sunlight irradiation box 6 by a predetermined distance L, and the irradiated surface 10A. In contrast, the direct light from the upper surface 6B of the simulated sunlight irradiation box 6 and the reflected light reflected by the reflecting surface 8 are irradiated. The distribution of the reflected light is controlled so as to compensate for the illuminance unevenness of the direct light on the irradiated surface 10A.

The reflection plate 30 is a metal plate having a surface, and extends substantially in parallel along the pseudo-sunlight irradiation box 6 as shown in FIGS. A reflection device 32 is configured by the reflection plate 30 and a holder 31 that holds the reflection plate 30. The plurality of reflecting devices 32 are arranged on the bottom floor 4 </ b> A of the frame body 4 so that the plurality of reflecting plates 30 are provided and the reflecting surface 8 is formed by these reflecting plates 30. Yes.
The holder 31 has an angle adjustment mechanism for adjusting the inclination angle of the reflection plate 30, whereby the reflection angle of light can be adjusted independently for each of the reflection plates 30. ing. At this time, as shown in FIG. 1, the heights of several holders 31 close to both side surfaces in the width direction of the frame 4 are sequentially increased, and the reflected light of the reflecting plates 30 on both side surfaces is on the inner side. It is prevented from being shielded by the reflecting plate 30.

Further, as shown in FIGS. 1 to 3, on the three side surfaces excluding one side surface in the longitudinal direction of the simulated solar light irradiation units 1A and 1B, the irradiated surface 10A from the height position of the simulated solar light irradiation box 6 is provided. Auxiliary reflecting surfaces 150A and 150B for reflecting incident light toward the irradiated surface 10A are provided. The auxiliary reflection surface 150A is disposed on the other side surface facing the one side surface that is not covered by the shielding plate 5, and the pair of auxiliary reflection surfaces 150B are disposed on both side surfaces in the width direction of the simulated solar light irradiation units 1A and 1B, respectively. . These auxiliary reflecting surfaces 150A and 150B are metal plate materials, and for example, when the illuminance drop of direct light on the side surface side of the pseudo-sunlight irradiation units 1A and 1B is remarkable, the auxiliary reflecting surfaces 150A and 150B It can be used to compensate for a decrease in illuminance of direct light by adjusting the reflection angle (tilt angle) of 150B. The auxiliary reflecting surfaces 150A and 150B are formed in such a length that does not cause a gap at an adjusted inclination angle so as not to reduce the illuminance of direct light at the four corners of the irradiated surface 10A.
As described above, since the auxiliary reflecting surfaces 150A and 150B are arranged on the side surfaces of the simulated sunlight irradiation units 1A and 1B, the light toward the side surfaces of the simulated sunlight irradiation units 1A and 1B is effectively used to The illuminance reduction of the direct light can be compensated, and the simulated sunlight irradiation units 1A and 1B can be downsized as compared with the case where the auxiliary reflection surface is provided horizontally below the simulated sunlight irradiation units 1A and 1B.

The simulated sunlight irradiation box 6, the reflecting surface 8, and the auxiliary reflecting surfaces 150A and 150B constitute a part of the optical system of the simulated sunlight irradiation units 1A and 1B. The optical system 1B is disposed close to one side surface where the auxiliary reflecting surface 150A extending in the length direction is not disposed.
As shown in FIG. 1, between the simulated sunlight irradiation box 6 and the irradiated surface 10A, the amount of transmitted light is set so as to cover the entire irradiated surface 10A and make the illuminance distribution on the irradiated surface 10A uniform. A transmitted light amount adjustment unit 60 for adjustment is provided.
That is, in each of the simulated sunlight irradiation units 1A and 1B, in addition to the compensation for the uneven illuminance of the direct light by the reflected light of the reflecting surface 8, the transmitted light amount adjusting unit 60 also reduces the illuminance unevenness of the irradiated surface 10A. .

4 is a longitudinal sectional view schematically showing the configuration of the transmitted light amount adjustment unit 60, and FIG. 5 is a plan view of the same.
As shown in FIG. 4, the transmitted light amount adjustment unit 60 includes a base plate 62, a transparent plate laminate 64 for adjusting the transmitted light amount, and a surface film (pressing member) 66, and the illuminance of the irradiated surface 10A is high. The translucent plate laminate 64 reduces the amount of light traveling toward a high location, thereby making the illuminance distribution uniform on the irradiated surface 10A in accordance with the low illuminance.
The base plate 62, the translucent plate laminate 64, and the surface film 66 each have a transmittance in the spectrum range of the artificial sunlight so as not to modulate the spectrum of the artificial sunlight emitted by the simulated sunlight irradiation box 6. Is constant (flat), and a material having a high transmittance is preferably used. As this material, acrylic resin is used in this embodiment. In addition, you may use glass for this material.

The base plate 62 is a plate-like member having a rectangular shape when viewed from above for supporting the light-transmitting plate laminate 64, and is formed to have such a thickness as to obtain rigidity sufficient to prevent bending due to its own weight. The base plate 62 is arranged so as to completely partition the simulated sunlight irradiation box 6 and the irradiated surface 10A.
On the upper surface of the base plate 62, as shown in FIG. 5, a translucent plate laminate 64 is arranged in each of the positions where the amount of transmitted light should be reduced in the illumination light passage range R through which the light illuminating the irradiated surface 10A passes. The remaining portions of the illumination light passage range R are made of a transparent plate laminate 64, an acrylic resin that is the same material as the transparent plate 65 and the base plate 62 constituting the transparent plate laminate 64. A single translucent plate 68 (hereinafter referred to as “spacer translucent plate 68”) is disposed. As a result, the translucent plate laminate 64 and the spacer translucent plate 68 are spread without gaps in the illumination light passing range R. The spacer translucent plate 68 is formed to have the same dimensions as the translucent plate laminate 64, and the replacement of the spacer translucent plate 68 and the translucent plate laminate 64 is easy.
The translucent plate laminate 64 is configured by laminating a plurality of translucent plates 65 (FIG. 6), and the parenthesis written with reference numeral 64 in FIG. The number of laminated transparent plates 65 is shown. The specific configuration of the light transmitting plate laminate 64 and the light amount adjustment will be described in detail later.

As shown in FIG. 5, a spacer plate (spacer member) 70 is provided around the illumination light passage range R to fill a gap between the illumination light passage range R and the side surfaces of the pseudo-sunlight irradiation units 1A and 1B. . That is, the upper surface of the base plate 62 is completely filled with the translucent plate laminate 64, the spacer translucent plate 68, and the spacer plate 70, so that the translucent plate laminate 64 can be positioned without being bonded to the base plate 62. Can be fixed. As a result, the translucent plate laminate 64 can be exchanged, and even if an impact or earthquake vibration during installation is applied to the transmitted light amount adjustment unit 60, the misalignment of the translucent plate laminate 64 can be prevented.
In addition, it is preferable to use the same material (acrylic resin in this embodiment) as the material of the spacer plate 70 as the material of the spacer plate 70. By doing so, the optical characteristics of the spacer plate 70 are equivalent to those of the spacer translucent plate 68 provided in the illumination light passage range R. Therefore, the area of the irradiated surface 10A is increased and the illumination light passage range R is somewhat expanded to the periphery. Even in such a case, the entire illuminated surface 10A can be illuminated.

As shown in FIG. 4, the surface film 66 has a spacer light-transmitting plate 64 and a spacer light-transmitting plate 64 in order to prevent lateral displacement of the light-transmitting plate stack 64 mounted on the base plate 62. Cover and press the surfaces of the plate 68 and the spacer plate 70. The surface film 66 is formed by forming PET (polyethylene terephthalate), which is a material that does not modulate the spectrum of pseudo-sunlight, in the same manner as an acrylic resin, in a thin film shape.

Next, the attachment structure of the transmitted light amount adjustment unit 60 to each pseudo-sunlight irradiation unit 1A, 1B will be described.
As shown in FIG. 4, each of the simulated sunlight irradiation units 1 </ b> A and 1 </ b> B has a slip-off prevention bracket 80 extending in parallel with the simulated sunlight irradiation box 6 on the side surfaces on both sides of the simulated sunlight irradiation box 6. Each is provided. Further, a fixing L angle 82 having an L-shaped cross section is fixed to each misalignment drop prevention bracket 80, and both edge portions 62 </ b> A of the base plate 62 of the transmitted light amount adjustment unit 60 are connected to each fixing L angle 82. The base plate 62 is installed by placing it.
On the upper surface of both edge portions 62A of the base plate 62, an L angle 84 for preventing lateral displacement is provided to fill the gap between the side surfaces of the spacer plate 70 and the simulated solar light irradiation units 1A and 1B and prevent lateral displacement of the spacer plate 70. Yes.

When the transmitted light amount adjusting unit 60 is attached, first, the fixing L angle 82 is fixed to the square member 2 with screws. After the base plate 62 is placed on the fixing L angle 82, an L angle 84 for preventing lateral displacement is placed from the upper side, and this preventing L angle 84 is attached to the fixing L angle 82 with a screw 87, and the simulated sunlight irradiation unit 1A. , 1B is fixed to the square member 2 on the side surface. As a result, the edge 62A of the base plate 62 is sandwiched between the fixing L angle 82 and the lateral shift preventing L angle 84, thereby preventing the base plate 62 from rattling.
Next, the spacer plate 70, the translucent plate laminate 64, and the spacer translucent plate 68 are spread on the base plate 62. Then, the spacer plate 70, the translucent plate laminate 64, and the spacer translucent plate 68 are covered with the surface film 66 together with the lateral shift preventing L angle 84. Finally, the edge portion of the surface film 66 is pressed by a pressing bar 86, and the pressing bar 86 is fixed to the L angle 84 for preventing lateral displacement by a bolt 89. With the above operation, the installation of the transmitted light amount adjustment unit 60 is completed.

Next, the configuration of the light transmissive plate laminate 64 will be described in detail.
FIG. 6 is a diagram schematically showing a cross section taken along the line II ′ shown in FIG.
As shown in this figure, the translucent plate laminate 64 is formed by overlapping a plurality of translucent plates 65 each made of an acrylic resin having a rectangular translucent surface with the same dimensions. When the pseudo sunlight F is incident on the light transmitting plate laminate 64, the back reflection of the pseudo sunlight F occurs at the front and back interfaces of each light transmitting plate 65, and the light transmitting plate laminate 64 is equivalent to the back reflection. The amount of transmitted light is reduced. Further, the transmittance of the translucent plate laminate 64 is determined by the number of the translucent plates 65 stacked without depending on the thickness of the translucent plate 65.
The reason for this is that the acrylic resin, which is the material of the translucent plate 65, has a high transmittance with respect to the pseudo-sunlight F. Therefore, when the pseudo-sunlight F passes through the translucent plate 65, Although absorption hardly occurs, it is considered that the amount of transmitted light is reduced by each back surface reflection because back surface reflection occurs at the front and back interfaces of the translucent plate 65.

Therefore, in the transmitted light amount adjustment unit 60 shown in FIG. 6, in the light transmitting plate laminate 64 in which the two light transmitting plates 65 are stacked, back surface reflection occurs at the front and back interfaces of each light transmitting plate 65, so that a total of 4 The amount of light transmitted through the simulated sunlight F is reduced by the number of back surface reflections, and in the light transmitting plate laminate 64 in which four light transmission plates 65 are stacked, the transmission of the pseudo sunlight F is transmitted by a total of 8 times of back surface reflection. The amount of light will be reduced. As described above, in the light transmitting plate laminate 64, the number of back surface reflections increases in proportion to the number of light transmitting plates 65, and thus the amount of transmitted light of the pseudo sunlight F is reduced in proportion to the number of light transmitting plates 65.

Here, as shown in FIG. 6, it is considered that the back surface reflection occurs twice at the contact portion C where the transparent plates 65 overlap in the vertical direction. That is, when the transparent plates 65 are simply stacked without using a binder such as an adhesive, a thin air layer 90 is formed between the transparent plates 65. By interposing the air layer 90 between the translucent plates 65, back-surface reflection occurs when the pseudo sunlight F exits from the lower translucent plate 65 to the air layer 90, and the upper side from the air layer 90. Even when the light enters the translucent plate 65, back surface reflection occurs, which causes two back surface reflections at the contact portion C.
In this way, the light transmitting plates 65 are simply overlapped without using a binder such as an adhesive, and only the air layer 90 is formed between the light transmitting plates 65, thereby transmitting the light transmitting plate laminate 64. The rate can be reduced in proportion to the number of laminated light-transmitting plates 65, and a light-transmitting plate laminate 64 with easy adjustment of the amount of light transmitted can be obtained.
In the transmitted light amount adjusting unit 60, a base plate 62 is provided below the translucent plate laminate 64, and a surface film 66 is provided on the translucent plate laminate 64. Since 68 is disposed, back surface reflection similarly occurs at each interface of the base plate 62, the surface film 66, and the spacer translucent plate 68. Therefore, the number of translucent plates 65 of the translucent plate laminate 64 is determined in consideration of these back surface reflections.

Here, since the translucent plate laminate 64 is configured by simply superimposing the translucent plates 65 without using a binder such as an adhesive, the translucent plate 65 is likely to be laterally displaced by an impact such as an earthquake. Therefore, as shown in FIG. 6, in the light transmitting plate laminate 64, the number of light transmitting plates 65 is reduced by reducing the thickness of the light transmitting plates 65 per sheet according to the number of light transmitting plates 65 to be stacked. Regardless, the entire thickness D is constant (3 mm in the present embodiment), and the spacer translucent plate 68 is also formed to the same thickness D. Thereby, since the other translucent plate 65 or the spacer translucent plate 68 always exists in the horizontal direction of the translucent plate 65, the lateral displacement of the translucent plate 65 is prevented.

However, in the translucent plate laminate 64, the translucent plate 65 becomes thinner as the number of the translucent plates 65 stacked is increased. Therefore, the thickness of the translucent plate laminate 64 and the spacer translucent plate 68 varies slightly. Only by this, the lateral displacement of the translucent plate 65 is likely to occur. Therefore, in the present embodiment, as shown in FIG. 6, the surfaces of the translucent plate laminate 64 and the spacer translucent plate 68 are covered with the surface film 66 described above, and the translucent plate laminate 64 is covered with the surface film 66. The lateral displacement of the translucent plate 65 is surely prevented by pressing the surface.
Each of the simulated sunlight irradiation units 1A and 1B having the transmitted light amount adjusting unit 60 configured as described above has a predetermined area (600 mm × 1200 mm) of the irradiated surface 10A located in front of each of the simulated sunlight irradiation units 1A and 1B. The degree of illuminance unevenness can be reduced well.

That is, each of the simulated sunlight irradiation units 1A and 1B is configured so that the effective irradiation area is about 600 mm × 1200 mm. In the simulated sunlight irradiation apparatus 100, in order to expand the irradiation range, FIG. 1 and FIG. As shown in FIG. 2, two pseudo-sunlight irradiation units 1A and 1B are arranged adjacent to each other. Since the straight tube type lamp 22 used in each of the simulated sunlight irradiation units 1A and 1B has little light emission in the axial direction, the simulated sunlight irradiation units 1A and 1B are arranged so that the lamps 22 are arranged in parallel. ing. Therefore, since the simulated sunlight irradiation units 1A and 1B are arranged in parallel along the light emission direction of the lamp 22, the irradiated surface located at the boundary portion between the simulated sunlight irradiation units 1A and 1B. In the portion of 10A, it is possible to prevent a decrease in illuminance due to the parallel arrangement of the light sources in the axial direction with less light emission.

Moreover, since the simulated solar light irradiation units 1A and 1B are miniaturized by providing the auxiliary reflecting surfaces 150A and 150B on the side surfaces, the optical systems of the simulated solar light irradiation units 1A and 1B (the simulated solar light irradiation box 6, The reflecting surface 8, the auxiliary reflecting surfaces 150A and 150B, and the transmitted light amount adjusting unit 60) are arranged relatively close to each other, and the irradiated surface 10A located at the boundary portion between the simulated solar light irradiation units 1A and 1B. It is possible to prevent a decrease in illuminance due to the optical systems of the pseudo-sunlight irradiation units 1A and 1B being spaced apart from each other. The simulated solar light irradiation units 1A and 1B are arranged such that one side surface where the auxiliary reflecting surface 150A extending in the length direction is not arranged is opposed. In the simulated sunlight irradiation apparatus 100, a part of the optical system of the simulated sunlight irradiation units 1A and 1B (the simulated sunlight irradiation box 6, the reflection surface 8, and the auxiliary reflection surfaces 150A and 150B) is brought close to one side surface. An igniter 23 for starting the two lamps 22 is arranged in the space at the right end in the width direction formed by the arrangement. That is, a part of the optical system of the simulated solar light irradiation units 1 </ b> A and 1 </ b> B is arranged close to the center in the width direction by the arrangement space of the igniter 23.

In the simulated solar light irradiation units 1A and 1B of the present embodiment, the distance L from the lamp 22 to the irradiated surface 10A is about several tens of centimeters, and the incident angle of light incident on the irradiated surface 10A is wide. By simply arranging two simulated sunlight irradiation units 1A and 1B in parallel, a lot of light from the adjacent simulated sunlight irradiation units 1A and 1B is synthesized and positioned near the boundary between the simulated sunlight irradiation units 1A and 1B. The illuminance increases at the irradiated surface 10A.
Therefore, a light shielding plate 130 is disposed between the simulated sunlight irradiation units 1A and 1B to block light leaking to the side of the simulated sunlight irradiation units 1A and 1B. The light shielding plate 130 is a plate material that extends in the longitudinal direction of the lamp 22 and has a flat surface arranged vertically. For example, the plate material is covered with a black light shielding sheet so that the surface has a property of absorbing light. It is formed using the thing which performed the light absorption process of. Further, the light shielding plate 130 is radiated from one of the simulated sunlight irradiation units 1A and 1B, and in the length direction of the lamp 22 so as to sufficiently shield the light toward the other simulated sunlight irradiation units 1B and 1A. Are provided between the shielding plates 5 facing each other.

Here, if all the lights from the adjacent simulated sunlight irradiation units 1A and 1B are shielded, the illuminance decreases at the irradiated surface 10A located at the boundary between the simulated sunlight irradiation units 1A and 1B. .
Therefore, the light shielding plate 130 is arranged at a predetermined distance M1 from the irradiated surface 10A so as to form a gap δ between the upper end portion 131 and the irradiated surface 10A. Thereby, the irradiation light of each pseudo-sunlight irradiation unit 1A, 1B can be irradiated to the place of the irradiated surface 10A located at the boundary portion between the adjacent pseudo-sunlight irradiation units 1A, 1B through the gap δ. Since it can do, the illumination fall by providing the light shielding plate 130 can be suppressed in the location of 10 A of irradiated surfaces located in the boundary part of adjacent pseudo-sunlight irradiation unit 1A, 1B. The distance M1 is set to a distance at which the boundary between the illuminances by the two pseudo-sunlight irradiation units 1A and 1B becomes inconspicuous. In the present embodiment, the distance M1 is set to 200 mm, for example.

FIG. 7 is a diagram showing the result of simulating the light distribution of the simulated sunlight irradiation device 100, FIG. 7A is a diagram showing the illuminance distribution on the irradiated surface 10A, and FIG. FIG. 7C is a graph showing the average illuminance in the length direction of the irradiated surface 10A.
As shown in this figure, on the irradiated surface 10A, the illuminance is in the range of 0.0048-0.0055 W / mm ^{2 in} most of the width direction center portion where the light shielding plate 130 is disposed, and the light shielding plate 130 is present. Although the illuminance is slightly reduced at the central portion in the width direction where the is disposed, the minimum illuminance is in the range of 0.0035-0.0042 W / mm ² , and the degree of decrease in illuminance is small. Therefore, according to the simulated sunlight irradiation device 100 of the present embodiment, the simulated sunlight irradiation box 6, the reflection surface 8, the auxiliary reflection surfaces 150 </ b> A and 150 </ b> B, and the transmitted light amount adjustment unit 60 of each of the simulated sunlight irradiation units 1 </ b> A and 1 </ b> B. The effective irradiation area can be expanded to about 1100 mm × 1400 mm without changing the optical design.

As described above, according to the present embodiment, a plurality of simulated sunlight irradiation units 1A, 1B are arranged in parallel, and each simulated sunlight irradiation unit 1A, 1B is placed between the simulated sunlight irradiation units 1A, 1B. Since the light shielding plate 130 for shielding the light leaking to the side of 1B is arranged, it is possible to suppress an increase in illuminance on the irradiated surface 10A due to the synthesis of the irradiation light of each of the simulated sunlight irradiation units 1A and 1B.
Further, a gap δ is formed between the upper end portion 131 of the light shielding plate 130 and the irradiated surface 10A, and a gap is formed in the irradiated surface 10A located at the boundary portion between the simulated solar light irradiation units 1A and 1B. In order to irradiate the irradiation light of each of the simulated sunlight irradiation units 1A and 1B through the section δ, the light shielding plate 130 is provided at the irradiated surface 10A located at the boundary portion between the simulated sunlight irradiation units 1A and 1B. The decrease in illuminance due to the provision can be suppressed. Thereby, an irradiation range can be expanded, without performing optical design of pseudo-sunlight irradiation units 1A and 1B again.

Further, according to the present embodiment, the simulated sunlight irradiation box 6 has the linear lamp 22 and the simulated sunlight irradiation units 1A and 1B are arranged so that the lamps 22 are arranged in parallel. Since the sunlight irradiation units 1A and 1B are arranged side by side along the radiation direction of the light of the lamp 22, in the place of the irradiated surface 10A located at the boundary portion between the simulated sunlight irradiation units 1A and 1B, It is possible to prevent a decrease in illuminance due to the parallel arrangement of light sources in the axial direction in which light emission is small.

Moreover, according to this embodiment, the incident light is irradiated to the side of the simulated sunlight irradiation units 1A and 1B between the height position of the simulated sunlight irradiation box 6 and the irradiated surface 10A. The auxiliary reflecting surfaces 150A and 150B that reflect toward 10A are arranged. With this configuration, light that is blocked by the shielding plate 5 arranged on the side surface of the frame body 4 can be effectively used to compensate for a decrease in illuminance of direct light on the irradiated surface 10A, and the auxiliary reflection surface can be framed. Compared with the case where it is arranged horizontally below the body 4, the simulated solar light irradiation device 100 can be reduced in size. Therefore, since the simulated sunlight irradiation units 1A and 1B can be disposed close to each other, the optical of the simulated sunlight irradiation units 1A and 1B is provided at the irradiated surface 10A located at the boundary between the simulated sunlight irradiation units 1A and 1B. It is possible to prevent a decrease in illuminance due to the system being spaced apart.

<Second Embodiment>
In the first embodiment, the two simulated sunlight irradiation units 1A and 1B are arranged in parallel, but in the second embodiment, the three simulated sunlight irradiation units 1A to 1C are arranged in parallel. In the first embodiment, the transmitted light amount adjustment unit 60 for adjusting the transmitted light amount is provided in order to reduce the illuminance unevenness of the irradiated surface 10A. However, in the second embodiment, the transmitted light amount adjustment unit 60 is used instead. Thus, a light diffusion unit 101 that diffuses light is provided.
FIG. 8 is a longitudinal sectional view schematically showing the configuration of the simulated solar light irradiation apparatus 200 according to the second embodiment. FIG. 9 is a plan view showing the simulated sunlight irradiation apparatus 200, and FIG. 10 is a cross-sectional view showing the configuration of the simulated sunlight irradiation apparatus 200. 8 to 10, the same parts as those of the simulated solar light irradiation apparatus 100 shown in FIGS. 1 to 3 are denoted by the same reference numerals, and the description thereof is omitted.

The simulated sunlight irradiation apparatus 200 includes three simulated sunlight irradiation units 1A to 1C. Each pseudo-sunlight irradiation unit 1A, 1B includes two upper and lower auxiliary reflecting surfaces 150A extending in the length direction and a pair of auxiliary reflecting surfaces 150B extending in the width direction. In the simulated solar light irradiation unit 1C, a frame 4 in which a plurality of square members 2 are assembled in a grid shape has dimensions of, for example, a length of about 1.6 m, a width of about 0.8 m, and a height of about 0.8 m. The pseudo-sunlight irradiation box 6 and the reflection surface 8 are configured and arranged substantially at the center in the width direction of the frame body 4. The simulated solar light irradiation unit 1C includes a frame 4 having different dimensions, a pseudo solar light irradiation box 6 and a reflecting surface 8 disposed at the center in the width direction, and two upper and lower sheets extending in the length direction. Except that the auxiliary reflecting surface 150A is not provided, it is configured in the same manner as the simulated sunlight irradiation units 1A and 1B.

As shown in FIG. 8, light is diffused between the simulated sunlight irradiation box 6 and the irradiated surface 10A so as to cover the entire irradiated surface 10A and to make the illuminance distribution on the irradiated surface 10A uniform. A light diffusing unit 101 is provided.
That is, in each of the simulated solar light irradiation units 1A to 1C, in addition to compensation for uneven illuminance of direct light by the reflected light of the reflecting surface 8, the unevenness of illuminance of the irradiated surface 10A is also reduced by the light diffusion unit 101.

FIG. 11 is a longitudinal sectional view showing the right half of the simulated solar light irradiation unit 1A. 12 is a diagram showing the configuration of the light diffusing members 110 and 120, and FIG. 12A is a longitudinal sectional view schematically showing the simulated sunlight irradiation unit 1A together with the enlarged light diffusing members 110 and 120. FIG. 12B is a diagram showing the light diffusing member 120 viewed from the irradiated surface 10A side. 11 and 12, the light diffusing members 110 and 120 of the simulated sunlight irradiation unit 1A are illustrated, but the light diffusing members 110 and 120 of the simulated sunlight irradiation units 1B and 1C are also irradiated with the simulated sunlight. The light diffusing members 110 and 120 of the unit 1A are configured the same.
As shown in FIGS. 11 and 12A, the light diffusing unit 101 includes a base plate 102 and two layers of light diffusing members 110 and 120 having a light diffusing effect, and the illuminated surface 10A has high illuminance. The light diffusing members 110 and 120 diffuse light directed toward the location, so that the illuminance distribution is made uniform on the irradiated surface 10A.
The transmittance of the base plate 102 and the light diffusing members 110 and 120 is constant (flat) in the spectrum range of the simulated sunlight so as not to modulate the spectrum of the simulated sunlight emitted by the simulated sunlight irradiation box 6. Furthermore, a material having a high transmittance is preferably used.

The base plate 102 is a plate-like member having a rectangular shape in a top view for supporting the light diffusing member 110, and is formed to have a thickness (for example, 15 mm) that can provide rigidity enough to prevent bending due to its own weight. Yes. For the base plate 102 of the present embodiment, acrylic resin is used as the material. In addition, you may use glass for this material. The base plate 102 is arranged on the irradiated surface 10A side of the frame 4 so as to completely partition the simulated sunlight irradiation box 6 and the irradiated surface 10A.
The two layers of light diffusing members 110 and 120 are each formed by laminating a plurality of diffusing plates, and are disposed at a distance D between the irradiated surface 10A and the lamp 22. The light diffusing effect of the light diffusing unit 101, that is, the effect of reducing the illuminance unevenness of the irradiated surface 10A depends on this distance D. In the present embodiment, the distance D between the two layers of the light diffusing members 110 and 120 is set to a distance (for example, 100 mm <D ≦ 200 mm) where the boundary of illuminance by the plurality of reflectors 30 is not noticeable.

Next, the attachment structure of the light diffusion unit 101 to each of the simulated sunlight irradiation units 1A to 1B will be described.
As shown in FIGS. 11 and 12, each of the simulated sunlight irradiation units 1A to 1B has a cross section L extending in parallel to the simulated sunlight irradiation box 6 on the irradiated surface 10A side and above the simulated sunlight irradiation box 6. Character-shaped light diffusing member receivers 103 are respectively provided on the side surfaces on both sides of the pseudo-sunlight irradiation box 6. Further, a plate-like light diffusing member receiver 104 extending orthogonally to the simulated sunlight irradiation box 6 on the irradiated surface 10A side and the simulated sunlight irradiation box 6 is provided in the length direction of the simulated sunlight irradiation box 6. Are provided on the side surfaces facing each other.
The base plate 102 and the light diffusing member 110 are placed on the light diffusing member receivers 103 and 104 provided on the irradiated surface 10 </ b> A side, and are fixed by holding metal fittings (not shown). It is placed on the light diffusing member receivers 103 and 104 provided on the upper side, and is fixed by holding metal fittings (not shown).

Next, the configuration of the light diffusing members 110 and 120 will be described in detail with reference to FIG.
The light diffusing member 110 on the irradiated surface 10A side is disposed on the upper surface of the base plate 102, and is configured by laminating a plurality of (in this embodiment, two) light diffusing plates 111 and 112. The light diffusing plate 111 on the irradiated surface 10A side is a plate-like member that is formed to have a size that covers the entire illumination light passing range through which the light that illuminates the irradiated surface 10A passes, and has been matted on both sides. It has a mat-like diffusion surface. The light diffusing plate 111 of this embodiment has a thickness of about 3 mm and is formed using a material (acrylic resin in this embodiment) having substantially the same optical characteristics as the base plate 102.

The light diffusing plate 112 on the base plate 102 side is a plate-like member formed in substantially the same size as the light diffusing plate 111, and has diffusing surfaces on both sides. One surface of the diffusion surface is formed into an embossed shape by being embossed, and the light diffusion plate 112 is arranged with the diffusion surface having the embossed shape facing the irradiated surface 10A. That is, the mat-like diffusion surface of the light diffusing plate 111 and the embossed surface of the light diffusing plate 112 are in contact with each other, and the lateral displacement of the light diffusing plate 111 can be prevented. The light diffusing plate 112 of this embodiment is formed using a material having a thickness of about 205 μm and a haze that is a ratio of the parallel light transmittance and the diffuse light transmittance of about 50%.

The light diffusing member 120 on the lamp 22 side includes a plurality of (in this embodiment, four) light diffusing plates 121, 122, 123A, 123B and an illuminance adjusting plate 124 that is a diffusing plate for adjusting illuminance location unevenness. It is configured by stacking. The light diffusing plate 121 is configured substantially the same as the light diffusing plate 111, and three light diffusing plates 122, 123 A, 123 B configured substantially the same as the light diffusing plate 112 are embossed on the upper surface of the light diffusing plate 121. Is placed with the diffusion surface having the surface facing the irradiated surface 10A. An illuminance adjusting plate 124 formed smaller than the light diffusing plates 121, 122, 123A, 123B is disposed between the two light diffusing plates 122, 123A (see FIG. 12B). The illuminance adjusting plate 124 is a plate-like member having diffusion surfaces on both sides and embossed on one side, and is disposed with the embossed surface facing the lamp 22 side. As a result, the embossed surface of the lower light diffusion plate 123A comes into contact with the embossed surface of the illuminance adjusting plate 124, and the lateral shift of the illuminance adjusting plate 124 can be prevented. In the present embodiment, the illuminance adjusting plate 124 is formed using a material having a thickness of about 270 μm and a haze of about 90%, and has three sizes of 80 mm × 400 mm, 150 mm × 600 mm, and 80 mm × 300 mm. An illuminance adjustment plate 124 is disposed.

As described above, since the illuminance adjusting plate 124 having a relatively high light diffusing effect is provided on the light diffusing member 120 on the lamp 22 side, the illuminance of the irradiated surface 10A is locally changed only by changing the position of the illuminance adjusting plate 124. Light that travels to high places can be more effectively diffused, and fine adjustment of illuminance unevenness can be easily performed. In addition to this, since the light diffused by the illuminance adjusting plate 124 can be further diffused by the light diffusing member 110 on the irradiated surface 10A side, compared to the case where the illuminance adjusting plate is arranged on the light diffusing member 110 on the irradiated surface 10A side, Irradiance unevenness can be further reduced. In addition, even when the illuminance unevenness changes over time or when the lamp 22 is replaced and the illuminance unevenness is changed, the illuminance unevenness can be easily reduced by changing the position and size of the illuminance adjusting plate 124. . Furthermore, since the illuminance adjusting plate 124 is disposed between the light diffusing plates 122 and 123, there is no need to provide a fixture for fixing the illuminance adjusting plate 124, and the number of parts can be reduced.
Each of the simulated sunlight irradiation units 1A to 1C having the light diffusion unit 101 configured as described above has a predetermined area (about 600 mm × 1200 mm) of the irradiated surface 10A located in front of each of the simulated sunlight irradiation units 1A to 1C. ), The illuminance unevenness can be reduced satisfactorily.

In the simulated sunlight irradiation apparatus 200, three simulated sunlight irradiation units 1A to 1C having an effective irradiation area of about 600 mm × 1200 mm are arranged adjacently so that the lamps 22 are arranged in parallel. The simulated solar light irradiation units 1A and 1B are disposed so that the side where the auxiliary reflection surface 150A extending in the length direction is not disposed is opposed to each other, and the pseudo solar light irradiation units 1A and 1B are disposed between the two simulated solar light irradiation units 1A and 1B. A light irradiation unit 1C is arranged.

In the present embodiment, the light shielding plate 130 is disposed between the simulated sunlight irradiation units 1A and 1C and between the simulated sunlight irradiation units 1B and 1C. The gap portion δ is formed between the irradiation surface 10A and the irradiation surface 10A by a predetermined distance M2. The distance M2 is set to a distance at which the boundary between the illuminances by the two simulated sunlight irradiation units 1A and 1B becomes inconspicuous. In this embodiment, the distance M2 is the distance from the irradiated surface 10A to the lower surface of the light diffusion member 120 on the lamp 22 side. Is set.
That is, since the light shielding plate 130 is disposed below the light diffusing members 110 and 120, each light diffusing member 110 and 120 may be formed for each of the simulated solar light irradiation units 1A to 1C as described above. More preferably, the solar light irradiation unit 1A to 1C is formed in a size extending over the pseudo-sunlight irradiation units 1A to 1C. As a result, the light diffusing members 110 and 120 are arranged at the boundary portions between the simulated sunlight irradiation units 1A to 1C, and thus the irradiated surface 10A located at the boundary portion between the simulated sunlight irradiation units 1A and 1B. Illuminance unevenness can be further reduced at the locations.

FIG. 13 is a diagram showing the measurement result of the illuminance unevenness of the irradiated surface 10A by the simulated sunlight irradiation device 200, and FIG. 13A is a diagram showing the illuminance distribution of the irradiated surface 10A, and FIG. ) Is a graph showing the illuminance in the width direction of the irradiated surface 10A, and FIG. 13C is a graph showing the illuminance in the length direction of the irradiated surface 10A.
As shown in this figure, the illuminance is in the range of 1.11-1.12 SUN (1 SUN = 1000 W / m ² ) to 1.15-1.16 SUN. When calculated, a value of about 1.82% was obtained, and it was demonstrated that the simulated sunlight irradiation device 200 can satisfactorily suppress the illuminance unevenness of the irradiated surface 10A. Therefore, according to the simulated sunlight irradiation device 200 of the present embodiment, the simulated sunlight irradiation box 6 of each of the simulated sunlight irradiation units 1A to 1C, the reflection surface 8, the auxiliary reflection surfaces 150A and 150B, the light diffusion unit 101, and the like. The effective irradiation area can be expanded to about 1100 mm × 2100 mm without changing the optical design.
Therefore, the irradiation range can be further expanded by arranging a plurality of simulated sunlight irradiation units 1C in parallel between the two simulated sunlight irradiation units 1A and 1B.

However, the above embodiment is an aspect of the present invention, and it is needless to say that the embodiment can be appropriately changed without departing from the gist of the present invention.
For example, in the said embodiment, although the frame was formed for every simulated sunlight irradiation unit, you may form a frame according to the whole magnitude | size which arranged the some simulated sunlight irradiation unit in parallel.

In the above embodiment, the gap is formed between the upper end of the light shielding plate and the irradiated surface by disposing the light shielding plate by a predetermined distance from the irradiated surface. It is arranged on the entire side surface of the simulated solar light irradiation unit, and by forming an open portion that opens a predetermined distance range from the irradiated surface at the upper end portion of the light shielding plate, the upper end portion of the light shielding plate and the irradiated surface are formed. A gap may be formed between them.
In the above embodiment, the plurality of simulated sunlight irradiation units are arranged adjacent to each other. However, the simulated sunlight irradiation units may be arranged in parallel with some (for example, several centimeters) intervals. Good.

1A to 1C Pseudo sunlight irradiation unit 6 Pseudo sunlight irradiation box 6A Lower surface 6B Upper surface 8 Reflecting surface 10 Object to be irradiated 10A Irradiated surface 22 Lamp (light source)
150A, 150B Auxiliary reflecting surface 100, 200 Pseudo-sunlight irradiation device 130 Light shielding plate 131 Upper end M Distance δ Gap

Claims (3)

1. A unit containing a pseudo-sunlight irradiation box that emits light from an upper surface and a lower surface, provided with a reflecting surface at a position opposite to the lower surface of the pseudo-sunlight irradiation box, and reflected light reflected upward by the reflecting surface; and A plurality of simulated sunlight irradiation units that irradiate the irradiated surface with direct light radiated from the upper surface of the simulated sunlight irradiation box on the irradiated position at the opposite position of the upper surface of the simulated sunlight irradiation box
   While arranging each simulated sunlight irradiation unit side by side,
   While arranging the light shielding plate that shields the light leaking to the side of each simulated sunlight irradiation unit between the simulated sunlight irradiation units,
   A gap portion is formed between the upper end portion of the light shielding plate and the irradiated surface, and each simulated sunlight is passed through the gap portion at a position of the irradiated surface located at a boundary portion between the simulated sunlight irradiation units. A pseudo-sunlight irradiation device characterized by irradiating with irradiation light from an irradiation unit.
2. The simulated sunlight irradiation box has a linear light source,
   The simulated sunlight irradiation device according to claim 1, wherein each of the simulated sunlight irradiation units is disposed so that the light sources are arranged in parallel.
3. On the side of the simulated sunlight irradiation unit, an auxiliary reflection surface that reflects incident light toward the irradiated surface is disposed between the height position of the simulated sunlight irradiation box and the irradiated surface. The pseudo-sunlight irradiation device according to claim 1 or 2, wherein

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