JP4136126B2 - Simulated solar irradiation lamp automatic changer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a simulated sunlight irradiation lamp automatic replacement device, and more particularly to a simulated sunlight irradiation lamp automatic replacement device capable of maintaining the light quantity and spectral distribution of irradiation light as desired over a long period of time.
[0002]
[Prior art]
As is well known, the pseudo-sunlight irradiation device is a light source device that can reproduce the spectral distribution of natural sunlight with high accuracy. For example, the performance measurement of various solar energy utilization devices such as photoelectric conversion characteristics of solar cells. Or used for accelerated aging tests.
[0003]
An example of a conventional simulated sunlight irradiation device is shown in FIG. In the figure, a xenon short arc lamp (hereinafter simply referred to as “xenon lamp”) 11 has a condensing mirror 15, and an integrating optical system on the optical axis of the xenon lamp 11 condensed by the condensing mirror 15. 14 is arranged. An infrared reflective cold filter 13 is disposed between the xenon lamp 11 and the integrating optical system 14 so as to intersect the optical axis (preferably at an angle of 45 °). The infrared reflective cold filter 13 reflects infrared light and transmits visible light and ultraviolet light.
[0004]
An incandescent filament lamp (hereinafter simply referred to as “incandescent lamp”) 12 also has a condenser mirror 16. The light from the incandescent lamp 12 is projected onto the surface of the infrared reflective cold filter 13 on the integrating optical system 14 side, and the light of the near infrared component is reflected. On the other hand, of the light from the xenon lamp 11 emitted from the condenser mirror 15, visible and ultraviolet component light passes through the infrared reflective cold filter 13. Thus, the light from the incandescent lamp reflected by the infrared reflective cold filter 13 and the light from the xenon lamp 11 transmitted through the infrared reflective cold filter 13 are directed coaxially toward the integrating optical system 14. Is done.
[0005]
The light superimposed and mixed by the infrared reflective cold filter 13 and the integrating optical system 14 is evenly dispersed on the irradiated sample 17. The heat absorber 20 functions to absorb infrared and near-infrared component light from the xenon lamp 11 reflected by the infrared reflective cold filter 13. An example of such a pseudo-sunlight irradiation device is described in Japanese Patent Publication No. 5-27921.
[0006]
According to this conventional apparatus, the single infrared reflective cold filter 13 removes infrared and near infrared components from the light of the xenon lamp 11 and extracts the near infrared components from the light of the incandescent lamp 12. Therefore, the configuration can be simplified and miniaturized, and the cost can be reduced.
[0007]
In this conventional apparatus, light from two light sources is used, and a long wavelength side component and a short wavelength side component are extracted and added by a single filter. Therefore, even if the filter characteristics of the infrared reflection type cold filter 13 slightly change, there is an advantage that the spectrum distribution of the finally obtained output light does not change so much. For this reason, the tolerance with respect to the filter characteristic of the infrared reflective cold filter 13 becomes large, and the manufacturing cost can be reduced.
[0008]
An example of the combined spectrum distribution by this conventional apparatus is shown in FIG. In the figure, a curve L1 is a spectral distribution characteristic curve obtained by removing components on the longer wavelength side from the near infrared in the light of the xenon lamp 11, and a curve L2 is visible light in the incandescent lamp 12 and It is a spectrum distribution characteristic curve from which the ultraviolet component has been removed. A curve L3 is an overall spectral distribution characteristic curve when the curves L1 and L2 are superimposed or mixed. The solid line curve L4 shows the spectral distribution characteristics of natural sunlight for comparison.
[0009]
From FIG. 6, if the xenon lamp light (curve L1) from which the longer wavelength component is removed from the near-infrared component and the incandescent lamp light (curve L2) from which the visible light and ultraviolet components are removed are superimposed or mixed. It can be seen that a spectrum distribution (curve L3) that closely approximates the spectrum distribution of natural sunlight (curve L4) is obtained, and that irregular peak groups in the near-infrared region can be reduced.
[0010]
[Problems to be solved by the invention]
The conventional apparatus has the following problems. That is, incandescent lamps and xenon lamps have different lifetimes. For example, the life of a halogen lamp as an incandescent lamp is as short as about 1/10 of the life of a xenon lamp. As an example, the halogen lamp was replaced when the lighting time exceeded 50 hours. Such a halogen lamp replacement operation in such a short time is very troublesome per se. Further, every time the halogen lamp is replaced, the operation of adjusting the lamp position and the xenon in order to maintain the spectrum at a desired value. Adjustment work is required to adjust the ratio of the amount of light to the lamp.
[0011]
In addition, since the light intensity of the halogen lamp has been reduced until the end of its life, the ratio of the light intensity of the halogen lamp and the xenon lamp gradually deviates from the desired value, and it is difficult to maintain a stable spectral distribution. There is a point. Conventionally, the adjustment of the light quantity ratio accompanying the reduction in the light quantity of the halogen lamp has been performed only at the time of replacing the halogen lamp. Therefore, there is a possibility that the spectral distribution may be different from that at the time of replacement, particularly near the life of the halogen lamp.
[0012]
The present invention has been made in view of the above problems, and an object of the present invention is to provide a pseudo-sunlight irradiation lamp automatic replacement device that facilitates replacement of an incandescent lamp and that can always obtain irradiation light having a stable spectral distribution. .
[0013]
[Means for Solving the Problems]
Therefore, in the present invention, a xenon lamp, an incandescent lamp, and filter means for removing a near infrared component from the emission spectrum of the xenon lamp and extracting a near infrared component from the emission spectrum of the incandescent lamp. In the simulated sunlight irradiation apparatus, a plurality of condensing mirrors for condensing the light of the incandescent lamp and a plurality of the incandescent lamps are arranged radially at a predetermined interval, and one of the incandescent lamps is used as light of the condensing mirror The turntable positioned on the axis and the incandescent lamp positioned on the optical axis at one end are positioned at a predetermined position near the focal point of the condenser mirror, and all the incandescent lamps are collected at the other end. A drive that reciprocates the turntable along the optical axis with a sloke that is set to retract to a position that can rotate in the rotation direction of the turntable without interfering with a mirror. There is a first feature in that comprising a stage.
[0014]
Further, according to the present invention, the stroke is set so that, at one end, the incandescent lamp is biased to a predetermined position ahead of the focal point of the condenser mirror, and the incandescent lamp with respect to a preset reference value of the light quantity A second feature is that the position of the incandescent lamp with respect to the focal point of the condenser mirror is changed by energizing the driving means so that the deviation of the light amount approaches zero.
[0015]
Further, the present invention is characterized in that the current supplied to the xenon lamp is changed so that the deviation of the light quantity of the xenon lamp from the reference value of the light quantity of the xenon lamp with respect to a preset reference value of the light quantity approaches zero. There are three features.
[0016]
According to the first feature, the plurality of incandescent lamps on the turntable are positioned on the optical axis, and the incandescent lamp positioned on the optical axis is further positioned at one end of the stroke along the optical axis. It can be positioned in the vicinity of the focal point of the condenser mirror.
[0017]
According to the second feature, since the position of the incandescent lamp is deviated from the focal point of the condenser mirror at the initial setting position, the light quantity at that position is smaller than the maximum light quantity. During operation, the amount of deviation is reduced to change the amount of light so that there is no deviation from the reference value. Therefore, the light quantity reduction accompanying the long-term use of the incandescent lamp is automatically compensated. According to the third feature, the current supplied to the xenon lamp is changed independently of the light amount control of the incandescent lamp.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view showing a configuration of a simulated solar light irradiation apparatus according to an embodiment of the present invention, and the same reference numerals as those in FIG. 5 denote the same or equivalent parts. In FIG. 1, a turntable 1 is provided so as to be rotatable about a shaft 1a, and a plurality of halogen lamps 12 as incandescent lamps are mounted on the turntable 1. A motor 2 that drives the shaft 1a of the turntable 1 is supported by a frame 3, and when the motor 2 is energized, the turntable 1a rotates in the direction of arrow A. The frame 3 is provided by a guide rail, which will be described later, so as to be able to reciprocate in the direction of arrow B (the optical axis direction of the condensed halogen lamp 12), and is the same by a feed screw (ball screw) 5 driven by a motor 4. Moved in the direction. The guide rails and the bearings 6 and 6 of the ball screw 5 are attached to a base 7.
[0019]
A xenon lamp 11 having an optical axis aligned with the optical axis of the halogen lamp 12 is provided. The xenon lamp 11 and the halogen lamp 12 are energized and turned on by a DC or AC power source (not shown). The xenon lamp 11 and the halogen lamp 12 are provided so as to face the condensing mirrors 15 and 16 from the top holes of the bowl-shaped condensing mirrors 15 and 16 including a rotating quadratic curved surface. , 12 are collected by the condenser mirrors 15 and 15 and projected onto the infrared transmission cold mirror 13A. In this case, the current supplied to the xenon lamp 11 and the position of the halogen lamp 12 with respect to the condenser mirror 16 are such that the emission intensity (or light quantity) becomes a preset reference value, as will be described later. Be controlled.
[0020]
In this embodiment, since the arrangement relationship between the xenon lamp 11 and the halogen lamp 12 is opposite to that in the example of FIG. 5, the light component on the short wavelength side is reflected instead of the infrared reflective cold filter 13. An infrared transmissive cold mirror 13A that reflects the light component on the ultra-wavelength side is disposed. However, the same arrangement relationship as in the case of FIG. Light from the halogen lamp 12 that has passed through the infrared transmissive cold mirror 13A and light from the xenon lamp 11 that has been reflected by the infrared transmissive cold mirror 13A are directed to the integrating optical system 14.
[0021]
Behind the integrating optical system 14 (right side in FIG. 1), the light superimposed and mixed by the integrating optical system 14 is separated into light for irradiating a sample to be irradiated (not shown) and light for detecting the light amount. A beam splitter 8 is provided. That is, of the light emitted from the integrating optical system 14, the light transmitted through the beam splitter 8 is irradiated onto the irradiated sample, while the light reflected by the beam splitter 8 is directed downward in FIG. Is done. As an example, about 92% of the light exiting the integrating optical system 14 is directed toward the light irradiation sample, and the remaining 8% is directed downward.
[0022]
An infrared transmissive cold mirror 9 as wavelength selection means is provided in the direction of light for detecting the light quantity, and a xenon lamp 11 from which light components on the short wavelength side, that is, infrared and near infrared components are removed. The light of the long wavelength side, that is, the light of the near infrared component extracted from the light of the halogen lamp 12 is transmitted.
[0023]
A xenon lamp light quantity sensor 18 and a halogen lamp light quantity sensor 19 are provided on the base 10 (which may be integrated with the base 7). The light quantity sensor 18 has an optical filter 20 and a photocell (photoelectric converter) 21, and the light quantity sensor 19 has an optical filter 22 and a photocell (photoelectric converter) 23. The optical filter 20 is a bandpass filter that allows light in the range of 400 to 500 nm, for example, and the optical filter 22 is a bandpass filter that passes light in the range of, for example, 900 to 1000 nm. These band filters 20 and 22 are provided to adjust the band corresponding to the output characteristics of the photocells 21 and 23 with respect to the wavelength.
[0024]
Next, the light quantity control device of the simulated solar device having the above configuration will be described. FIG. 2 is a block diagram showing functions of the light quantity control device. The xenon lamp 11 and the halogen lamp 12 are controlled separately. The light quantity control function of the xenon lamp 11 will be described. The reference value setting unit 24 is, for example, a variable resistor for setting the reference value (or target value) Xref of the light amount of the xenon lamp 11 (a method for setting the reference value will be described later). The output signal of the photocell 21 of the xenon sensor 18 as the second light quantity measuring means is input to the subtractor 25 and compared with the reference value Xref set in the reference value setter 24, and the photocell corresponding to the reference value Xref. The deviation dX of the 21 output signals is calculated. As the subtracter 25, for example, a differential amplifier can be used.
[0025]
Based on the deviation dX, the control amount calculator 26 performs an appropriate calculation such as PID (proportional / integral / differential calculation), and generates a control command CX. The control command CX is supplied to the current controller 27 and controls the current value supplied to the xenon lamp 11 so that the deviation dX becomes zero.
[0026]
On the other hand, the light quantity control function of the halogen lamp 12 is as follows. The reference value setting unit 28 is, for example, a variable resistor for setting the reference value (or target value) Href of the light quantity of the halogen lamp 12 (a method for setting the reference value will be described later). The output signal of the photocell 23 of the halogen sensor 19 as the first light quantity measuring means is input to the subtractor 29 and compared with the reference value Href set in the reference value setter 28, and the photocell for the reference value Href is compared. A deviation dH of the output signal 23 is calculated. As the subtracter 29, for example, a differential amplifier can be used.
[0027]
Based on the deviation dH, the control amount calculator 30 performs an appropriate calculation such as PID (proportional / integral / differential calculation), and generates a control command CH. The control command CH is supplied to the motor driver 31 and controls the motor 4 for reciprocating the halogen lamp 12 in the optical axis direction (the B direction) so that the deviation dH becomes zero. That is, the intensity (or light amount) of the light collected by the condenser mirror 16 differs depending on the position of the halogen lamp 12 with respect to the focal point of the condenser mirror 16 (the position of the filament of the halogen lamp 12). That is, the amount of light decreases as the distance from the focal point increases. Therefore, when replacing the halogen lamp, the ratio of the amount of light with the xenon lamp 11 is set to a desired value while the position of the halogen lamp 12 is shifted forward (infrared transmitting cold mirror 13A side) or backward. Keep it.
[0028]
Then, as the amount of light decreases as the lighting time elapses, the halogen lamp 12 is moved forward or backward to bring the position closer to the focal point. As a result, of the light emitted from the halogen lamp 12, the amount of light of the near-infrared component extracted by the infrared transmission cold mirror 13A is incident on the integrating optical system 14 and reaches the irradiated sample. The amount of light returns to the value when the lamp was replaced.
[0029]
In this way, the irradiated sample is stably irradiated with simulated sunlight having a spectral distribution very close to that of natural sunlight, as indicated by a curve L3 in FIG. 6, for example.
[0030]
Next, the replacement / positioning mechanism of the halogen lamp 12 will be described. 3 is a plan view of the halogen lamp positioning device, FIG. 4 is a front view, and the same reference numerals as those in FIG. 1 denote the same or equivalent parts. In both figures, the turntable 1 is attached to a shaft 1a by bolts 32, and ten halogen lamps 12 having optical axes aligned with virtual lines extending radially from the shaft 1a at equal angular intervals are insulated members (for example, (Teak material) 33 is provided. The number of halogen lamps 12 is preferably determined by the life ratio with the xenon lamp 11. Here, the number of halogen lamps 12 is set to 10 on the assumption that the lifetime of the xenon lamp 11 is one-tenth of the lifetime of the xenon lamp 11. Therefore, when other types of incandescent lamps are used, for example, if the lifetime is one sixth of the lifetime of the xenon lamp 11, six incandescent lamps are provided. Thus, by setting the total life of all the halogen lamps 12 and the life of the single xenon lamp 11 to be substantially the same, the ten halogen lamps 12 used at the time of replacement of the xenon lamp 11 are all new at the same time. It is convenient because it only has to be exchanged.
[0031]
The insulating member 33 has a pair of terminals 34 and 34 for supplying power to the halogen lamp 12. The terminals 34 and 34 are configured to be able to supply power by contacting power supply portions 35 and 35 erected on the upper surface of the frame 3 when the turntable 1 stops at a predetermined position. More specifically, each of the power feeding portions 35 and 35 includes a pair of conductive plates 35a and 35b facing each other, and the terminals 34 and 34 are sandwiched between the conductive plates. A power supply cable (not shown) is connected to the power supply units 35 and 35.
[0032]
A guide rail 36 for guiding the frame 3 in the direction of the arrow B is provided on the base 7. The frame 3 is placed on the guide rail 36 via a low friction member such as a roller bearing. Is done. The base 7 is provided with a limit switch 37 that defines the front end position limit of the frame 3 and a limit switch 38 that defines the rear end position limit. Further, a limit switch 39 for detecting the rotational direction position of the turntable 1 is provided above the frame 3. The limit switch 39 outputs a detection signal when the actuator is urged by convex portions (may be concave portions) provided at equiangular intervals around the shaft 1a on the lower surface of the disk 40 protruding from the shaft 1a. The blower 41 is provided for cooling the inside of the housing, particularly the motor 4 when the halogen lamp 12 and the turntable 1 for moving the position are accommodated in the housing.
[0033]
In operation, the motor 4 is driven to retract the frame 3 to the rear end position limit defined by the limit switch 38, and the front halogen lamp 12 is pulled away from the rear end or top of the condenser mirror 16. Then, ten new halogen lamps 12 are mounted on the turntable 1. At this time, it is preferable to set a new xenon lamp 11 at the same time. Further, the halogen lamp 12 is preferably attached to and detached from the turntable 1 by loosening the bolt 32 and removing the turntable 1 from the shaft 1a in a work place with good operability.
[0034]
If the halogen lamp 12 is mounted, the turntable 1 is rotated by the motor 2 and the motor 2 is stopped at the position where the limit switch 39 outputs the detection signal of the convex portion (or concave portion). At this time, the positional relationship between the convex portion (or concave portion) position of the disc 40 and the limit switch 39 is set so that one of the ten halogen lamps 12 coincides with the center line of the condenser mirror 16, that is, the optical axis. Set it.
[0035]
Subsequently, the motor 4 is rotated to move the frame 3 forward, and the motor 4 is stopped at the position where the limit switch 37 outputs the detection signal. At this time, the positional relationship between the front surface of the frame 3 (the surface on the infrared transmitting cold mirror 13A side) and the limit switch 37 is set so that the position of the halogen lamp 12 is positioned in front of the focal point of the condenser mirror 16. Set it.
[0036]
Initial settings such as rotation of the turntable 1 and movement of the frame 3 after the halogen lamp 12 is newly mounted may be automatically performed or may be performed in accordance with an operator instruction by a button device or the like. However, it is desirable that the light amount control of the halogen lamp 12 after the initial setting is completed automatically as described with reference to FIG.
[0037]
Next, the setting procedure of the reference value setters 24 and 28 will be described. When the initial setting of the halogen lamp 12 and the installation of the xenon lamp 11 are completed, a light quantity measuring device TP (see FIG. 1) as a third light quantity measuring means is set on the irradiated sample stage (not shown). For example, a thermopile that converts heat generated by absorbing light into electric power is suitable. Since pseudo-sunlight that approximates natural sunlight of one sun (SUN) in air mass (AM) 1.5G corresponds to a light amount of 100 mW / cm ² , the light amount ratio of the xenon lamp 11 and the halogen lamp 12 is 1: 1. In this case, the reference value is set so that a light amount of 50 mW / cm ² can be obtained.
[0038]
First, the xenon lamp 11 and the halogen lamp 12 are individually turned on, and the reference value setter 24 and the reference value setter are set so that the output becomes 50 mW / cm ² while monitoring the output of the thermopile at that time. 28 is adjusted. In this way, the light quantity reference value of 50 mW / cm ² is set in the reference value setter 24 and the reference value setter 28, respectively.
[0039]
When the halogen lamp 12 cannot irradiate the amount of light corresponding to the reference value even by adjusting its position, it is determined that the halogen lamp 12 has expired. When the position of the halogen lamp 12 is moved backward to control the light amount to the reference value, the retracting operation of the halogen lamp 12 is continued if the life of the halogen lamp 12 is exhausted and the light amount does not recover to the reference value. . When the rear end of the frame 3 is detected by the limit switch 38, the backward movement of the halogen lamp 12 is stopped and turned off. In this position, the halogen lamp 12 is completely pulled out from the condenser mirror 16, and the turntable 1 can be rotated in order to replace it with the next adjacent halogen lamp 12. When the turntable 1 is rotated and the next halogen lamp 12 is aligned with the optical axis of the condenser mirror 16, the frame 3 is again driven to move the halogen lamp 12 into the condenser mirror 16. The replacement operation of the halogen lamp 12 may be automatically performed as in the initial setting, or may be performed by successive button operations by the operator.
[0040]
As described above, according to the present embodiment, a plurality of halogen lamps 12 having a shorter lifetime than the xenon lamp 11 are attached in advance in consideration of the lifetime of the xenon lamp 11, and the turntable 1 is rotated in order. The frame 3 can be easily exchanged by reciprocating motion. In this way, by replacing the plurality of halogen lamps 12 at a time, it is possible to avoid replacement work involving removal and attachment of the halogen lamps 12 every short time.
[0041]
Further, the decrease in the light amount occurring during the lifetime can be corrected separately for each of the xenon lamp 11 and the halogen lamp 12 in accordance with the reference value of the light amount set first. In addition, individual differences between the individual halogen lamps 12 required when the halogen lamp 12 is replaced are also corrected. Further, the light quantity adjusting mechanism of the halogen lamp 12 can be used together with a moving mechanism for replacing the halogen lamp 12, so that the configuration is not complicated.
[0042]
As will be readily understood by those skilled in the art, the current controller 27, the photocells 21 and 23, the subtractors 25 and 29, the reference value setting units 24 and 28, the control amount calculators 26 and 30, etc. are feedback controlled. A loop is configured. Therefore, it is obvious that the control loop is not limited to the illustrated one, and any appropriate one can be adopted. Further, the installation positions of the xenon lamp light quantity sensor 18 and the halogen lamp light quantity sensor 19 are not limited to the above positions, and may be arranged in any of the light irradiation ranges as long as the bands are limited by the band filters 20 and 23. May be.
[0043]
Furthermore, in this embodiment, in order to control the light amount of the halogen lamp 12, the position of the halogen lamp 12 is changed in the vicinity of the focal point of the condenser mirror according to the reference value of the light amount. However, the light quantity control function for the halogen lamp 12 is not allowed under the condition that the halogen lamp 12 is allowed to be replaced early without using one halogen lamp until the light quantity becomes extremely low near the end of its life. It may be omitted. Even if it does in this way, the frequency | count of replacement | exchange work of the halogen lamp 12 becomes low, and the effect that a work is simplified is achieved.
[0044]
Further, the integrating optical system 14 is provided for the purpose of eliminating the unevenness of the irradiation light and irradiating the irradiation surface with uniform light. Therefore, the integrating optical system 14 is omitted for applications where a certain amount of uneven irradiation is allowed. May be.
[0045]
【The invention's effect】
As apparent from the above description, according to the first to seventh aspects of the invention, the replacement work of the incandescent lamp having a short life is not frequently performed, and the efficiency is improved. In particular, according to the second aspect of the present invention, it is possible to automatically compensate for a decrease in light amount within the life of the incandescent lamp. According to the fourth aspect of the present invention, since the ratio of the incandescent lamp and the xenon lamp can be maintained at a preset ratio, it is possible to stably irradiate light having a high spectral distribution. In the invention of claim 6 , when the incandescent lamp reaches the end of its life, the incandescent lamp is automatically retracted from the condenser mirror, so that it is possible to smoothly shift to the next incandescent lamp replacement operation.
[Brief description of the drawings]
FIG. 1 is a diagram showing a schematic configuration of a simulated solar light irradiation apparatus according to an embodiment of the present invention.
FIG. 2 is a block diagram showing a main configuration of a light amount control device.
FIG. 3 is a plan view of a halogen lamp positioning device;
FIG. 4 is a front view of a halogen lamp positioning device.
FIG. 5 is a schematic configuration diagram showing an example of a conventional simulated sunlight irradiation device.
FIG. 6 is a diagram showing spectral distribution characteristics of synthetic light and natural sunlight obtained by weighting a xenon short arc lamp and an incandescent lamp.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Turntable, 2, 4 ... Motor, 3 ... Frame, 5 ... Ball screw, 8 ... Beam splitter, 9 ... Infrared transmission cold mirror, 11 ... Xenon lamp, 12 ... Incandescent lamp, 13 ... Infrared reflective cold Filter, 13A ... Infrared transmission cold mirror, 14 ... Integrating optical system, 15, 16 ... Condensing mirror, 17 ... Sample to be irradiated, 18 ... Light quantity sensor for xenon, 19 ... Light quantity sensor for halogen lamp, 21, 23 ... Photo Cell, 24, 28 ... reference value setter,
25, 29 ... subtractor, 27 ... current controller

Claims (7)

A pseudo having a xenon short arc lamp, an incandescent filament lamp, and filter means for removing a near infrared component from the emission spectrum of the xenon short arc lamp and extracting the near infrared component from the emission spectrum of the incandescent filament lamp. In the solar irradiation lamp automatic changer,
A condensing mirror for condensing the light of the incandescent filament lamp;
A plurality of the incandescent filament lamps arranged radially at a predetermined interval, and a turntable for positioning one of the incandescent filament lamps on the optical axis of the condenser mirror;
At one end, the incandescent filament lamp positioned on the optical axis is positioned in the vicinity of the focal point of the condenser mirror, and at the other end, all of the incandescent filament lamp does not interfere with the condenser mirror and A pseudo-sunlight irradiation lamp automatic changer comprising a driving means for reciprocating the turntable along the optical axis with a stroke set so as to retreat to a position rotatable in a rotation direction. . The stroke is set at one end so that the incandescent filament lamp is biased to a predetermined position ahead of the focal point of the condenser mirror,
First light quantity reference value setting means for setting a reference value of the light quantity of the incandescent filament lamp; first light quantity measuring means for measuring the light quantity of the incandescent filament lamp;
The position of the incandescent filament lamp with respect to the focal point of the condenser mirror by energizing the driving means so that the deviation of the light quantity measured by the first light quantity measuring means with respect to the reference value of the light quantity of the incandescent filament lamp approaches zero. The automatic solar irradiation lamp automatic replacement device according to claim 1, further comprising a first light amount control unit that changes the light intensity. Second light quantity reference value setting means for setting a reference value of the light quantity of the xenon short arc lamp;
Second light quantity measuring means for measuring the light quantity of the xenon short arc lamp;
Second light quantity control means for changing a current supplied to the xenon short arc lamp so that a deviation of the light quantity measured by the second light quantity measuring means with respect to a reference value of the light quantity of the xenon short arc lamp approaches zero. The automatic solar irradiation lamp automatic replacement device according to claim 2, further comprising: Comprising a third light quantity measuring means for measuring the quantity of light from each of the incandescent filament lamp and the xenon short arc lamp on the irradiated sample;
The reference value of the light quantity of the incandescent filament lamp and the reference value of the light quantity of the xenon short arc lamp are the light quantities of the light from the incandescent filament lamp and the xenon short arc lamp measured by the third light quantity measuring means. 4. The automatic solar irradiation lamp automatic replacement device according to claim 3, wherein the initial setting is such that the ratio is as follows. After replacing all of the incandescent filament lamps, the driving means moves the turntable to the one end of the stroke of the driving means, and one of the incandescent filament lamps is located on the optical axis. The automatic solar irradiation lamp automatic replacement device according to any one of claims 1 to 4, characterized in that the initial setting is performed as described above.   When the incandescent filament lamp reaches the end of its life, the driving means moves the turntable to the other end of the stroke of the driving means, thereby condensing the incandescent filament lamp located on the optical axis. 6. The automatic solar irradiation lamp automatic replacement device according to claim 5, wherein the automatic solar irradiation lamp replacement device is configured to be separated from the rear end of the mirror.   The light of the near-infrared component extracted by the filter means out of the light emitted from the xenon short arc lamp from which the near-infrared component has been removed and the light emitted from the incandescent filament lamp is incident in front of the filter means. The pseudo-sunlight irradiation lamp automatic replacement device according to any one of claims 1 to 6, wherein one integrating optical system is arranged.

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