JPH09147602A - Mixed lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently radiate a radiant energy similar to that of a sunlight by obtaining a radiant energy similar to the spectral distribution of sunlight in the visible and infrared wavelength regions from a metal halide lamp and a halogen bulb. SOLUTION: A mixed lighting system is provided with a light source composed of a metal halide lamp 1 of 1kW and a halogen electric bulb 2 of 500W. The lamp 1 and the bulb 2 are respectively housed in a metal halide illuminator 1a and a halogen bulb illuminator 2a. These illuminator are alternately arranged so as to be placed adjacently to each other. Lighting circuits for respectively lighting these bulbs are separately provided. A reflection surface 1b and a dichroic filter 3 are attached to the device 1a oppositely to the light emitting part of the lamp. A reflection surface 2b and a dichroic filter 4 are attached to the device 2a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixed light illuminating device which can obtain a required radiant energy approximate to sunlight.

[0002]

2. Description of the Related Art Conventionally, this type of mixed light illuminating device is used as a general illuminating device by artificially producing natural light, and as described in, for example, JP-A-59-78493. It is used for weathering test of equipment. For example, in an air conditioner for an automobile, it is known that the irradiation amount of sunlight is detected by a sensor provided inside the vehicle and the air conditioner is controlled based on the detected amount. It is known to use the approximate sun light produced by, for example, a mixed light illuminator as described above for confirmatory testing in the environment.

Here, since the frequently used sensor mainly detects the amount of heat of the environment to which it is attached, the wavelength range to be detected is, for example, 600 nm in the near infrared light wavelength range.
To 1200 nm.

Here, for such test confirmation, it is essential that there is a correlation between the radiant energy of sunlight and the ratio of the radiant energy in the wavelength range to be detected. That is, since the amount of heat largely depends on the radiant energy in the infrared region, it is sufficient to approximate the radiant energy only in that wavelength range to the energy in that wavelength range of sunlight, but it reduces discomfort with the atmosphere in the natural environment. Or
It is necessary to approximate the sense of brightness such as illuminance to sunlight.

This mixed-light illumination device is a combination of a plurality of metal halide lamps and a plurality of halogen light bulbs, and regulates the total input power ratio of the lamps within a predetermined range to efficiently disperse the spectral radiant energy distribution similar to sunlight. I was trying to obtain.

[0006]

However, since the above-described mixed light illumination device merely defines the total input power ratio of two types of lamps having different spectral energy distributions, the mixed light illumination device emits light. Although the color of the emitted light can be approximated to that of sunlight, it was actually difficult to bring the spectral distribution of the emitted light from the device close to the spectral distribution of sunlight and sunlight.

Furthermore, when this kind of mixed light illuminating device is used for testing various devices such as sensors as described above, it is difficult to reproduce the temperature distribution of sunlight in a predetermined wavelength range as described above. There is a problem that exists.

Therefore, it is an object of the present invention to provide a mixed light illuminating device which can approximate the spectral distribution of sunlight in at least a specific wavelength range.

[0009]

A mixed light illumination device according to claim 1, wherein the light source includes a plurality of lamps that emit light having different spectral distributions; and a first specific wavelength in sunlight. With respect to the ratio of the total radiant energy of the second specific wavelength region to the total radiant energy of the region, with the total radiant energy of the second specific wavelength region to the total radiant energy of the first specific wavelength region emitted from the light source, Spectral distribution control means for controlling the spectral distribution of at least one emitted light of the plurality of lamps so that the ratios are approximate.

According to the present invention, the spectral distribution control means approximates the spectral distribution of sunlight in order to control the radiated light so that the amount of radiant energy in a specific wavelength range is approximate to the radiated light from the sunlight and the light source. Radiant energy can be obtained.

A mixed light illuminating device according to a second aspect of the present invention includes a light source including a metal halide lamp and a halogen bulb; and a total radiant energy of sunlight in the infrared light wavelength range defined by 800 nm or more and 2500 nm or less. Four
The ratio of the total radiant energy in the visible light wavelength range to the total radiant energy in the infrared light wavelength range emitted from the light source is higher or lower than the ratio of the total radiant energy in the visible light wavelength range defined by 00 nm or more and less than 800 nm. Spectral distribution control means for controlling the spectral distribution of the radiated light of at least one of the metal halide lamp and the halogen light bulb so as to be within 10%.

In the present invention described in the claims and the following claims, the meanings of the terms are defined as follows unless otherwise specified.

According to the present invention, the spectral distribution control means controls the radiant energy of the light emitted from the light source in the visible light region and the infrared light region so as to be extremely close to those of sunlight, It is possible to obtain radiant energy that approximates the spectral distribution of sunlight.

According to a third aspect of the mixed light illumination device of the present invention, in the mixed light illumination device of the second aspect, spectral distribution means for controlling the spectral distributions of the light emitted from the metal halide lamp and the halogen bulb are provided. According to the present invention, it is possible to separately control the spectral distribution means of the metal halide lamp and the spectral distribution means of the halogen bulb, and obtain radiant energy close to the spectral distribution of sunlight.

According to a fourth aspect of the mixed light illumination device of the present invention, in the mixed light illumination device of the third aspect, the spectral distribution control means for controlling the spectral distribution of the radiated light of the halogen bulb is the radiant energy of the halogen bulb. Among them, it is mainly composed of a reflecting surface or a filter on which an optical interference film for controlling a wavelength of 600 nm or less is formed.

According to a fifth aspect of the present invention, there is provided a mixed light illumination device according to the third aspect, wherein the spectral distribution control means for controlling the spectral distribution of the emitted light of the metal halide lamp comprises:
Of the radiant energy of halogen bulbs, the wavelength is mainly 50
It is composed of a reflecting surface or a filter formed with an optical interference film for controlling 0 nm or less.

According to these inventions, the radiant energy of the light source is divided into the visible light wavelength region and the infrared light wavelength region, respectively. Radiant energy similar to the spectral distribution in the visible light wavelength range is obtained, and the radiant energy approximated to the spectral distribution in the infrared light wavelength range of sunlight is obtained from a halogen bulb that has a large amount of energy emission in the visible light range due to its emission characteristics. It becomes possible to obtain.

The mixed light illumination device according to a sixth aspect is the mixed light illumination device according to the second aspect, further comprising spectral distribution control means for controlling the spectral distribution of the emitted light of the metal halide lamp. The means is a reflecting surface or a filter formed with an optical interference film that mainly controls the infrared light wavelength region or more of the radiant energy of the metal halide lamp.

According to the present invention, the radiant energy of the light source is divided into a visible light wavelength region and an infrared light wavelength region,
From the metal halide lamp side, radiant energy similar to the spectral distribution in the visible light wavelength range of sunlight can be obtained, and from the halogen bulb side, radiant energy similar to the spectral distribution in the infrared light wavelength range of sunlight can be obtained. Becomes

According to a seventh aspect of the present invention, there is provided a mixed light illumination device according to the third aspect, wherein the spectral distribution control means for controlling the spectral distribution of the radiated light of the halogen bulb is the radiant energy of the halogen bulb. Among them, a reflection surface or a filter formed with an optical interference film for controlling the visible light wavelength region or less mainly; the spectral distribution control means for controlling the spectral distribution of the radiated light of the metal halide lamp is mainly the radiant energy of the metal halide lamp. A reflective surface or a filter formed with an optical interference film that controls the infrared light wavelength range and above;
It is characterized by.

According to the present invention, the radiant energy of the light source is divided into a visible light wavelength region and an infrared light wavelength region,
Radiation energy approximating the spectral distribution in the visible light wavelength range of sunlight is obtained from the metal halide lamp side, and radiant energy approximating the spectral distribution in the infrared light wavelength range of sunlight is obtained from the halogen bulb side.

Therefore, with respect to the radiant energy in the visible light wavelength range with respect to the radiant energy in the infrared light wavelength range in sunlight, the radiant energy in the visible light wavelength range with respect to the radiant energy in the infrared light wavelength range emitted from the light source. Can be within 10% up and down.

According to an eighth aspect of the mixed light illumination device of the sixth or seventh aspect, the light interference film is an ITO film.

In the present invention, the ITO film means In2O3-
It is an optical interference film containing SnO2 as a main component.

According to the present invention, it is possible to obtain the same operation as that of the invention described in claim 6 or 7.

A mixed light illumination device according to a ninth aspect of the present invention includes a light source including a plurality of lamps each having a different spectral distribution; and a near-infrared light wavelength range for total radiant energy of all wavelength ranges in sunlight. With respect to the ratio of the total radiant energy, at least one of the plurality of lamps so that the ratio of the total radiant energy other than the near-infrared light wavelength range to the total radiant energy of the entire wavelength range emitted from the light source is approximate. And a spectral distribution control means for controlling the spectral distribution of the emitted light.

According to the present invention, the radiant energy of the light source is divided into the whole wavelength range and the near-infrared wavelength range, respectively, and from a kind of lamp side, the radiation mainly approximates the spectral distribution of the whole wavelength range of sunlight. Energy from the other lamp side,
If we obtain radiant energy that approximates the spectral distribution of sunlight in the near-infrared wavelength region, it will approximate the ratio of total radiant energy in the near-infrared wavelength region of sunlight to the total radiant energy in all wavelength regions of sunlight. It is possible to efficiently obtain each radiant energy at the above ratios, and it is possible to provide, for example, a mixed light illumination device suitable for an environmental test of a sensor for heat detection.

According to a tenth aspect of the present invention, there is provided a mixed light illuminating device comprising: a light source including a metal halide lamp and a halogen bulb; and a total near-infrared light wavelength range with respect to total radiant energy of all wavelength ranges in sunlight. A metal halide lamp and a halogen bulb so that the ratio of the total radiant energy other than the near-infrared light wavelength range to the total radiant energy of the entire wavelength range emitted from the light source is within 10% of the ratio of the radiant energy. And a spectral distribution control means for controlling the spectral distribution of at least one of the radiated light.

According to the present invention, the radiant energy of the light source is divided into the total wavelength range and the near-infrared wavelength range, and the radiant energy approximated to the spectral distribution of the main wavelength range of sunlight is mainly emitted from the metal halide lamp. , If the radiant energy approximated to the spectral distribution in the near infrared wavelength range of sunlight is obtained from a halogen bulb, the total near-infrared wavelength range of sunlight will be Each radiant energy can be efficiently obtained at a ratio close to the ratio of the radiant energy.

The mixed light illuminating device according to claim 11 is a light source including a metal halide lamp and a halogen light bulb; a near infrared light wavelength range with respect to a total radiant energy of all wavelength ranges emitted from the light source. And a spectral distribution control means for controlling the radiated light of the halogen bulb below the near-infrared light wavelength region so that the ratio of the total radiant energy becomes approximately 20%.

According to the present invention, the same operation as that of the tenth aspect of the invention is provided.

According to a twelfth aspect of the mixed light illumination device of the present invention, in the mixed light illumination device according to any one of the first to eleventh aspects, the metal halide lamp and the halogen bulb are arranged adjacent to each other. Characterize.

In the present invention, the metal halide lamps and the halogen light bulbs may be arranged vertically and horizontally, for example, by alternately arranging the lamps in one row, but not limited to this.

According to the present invention, the radiated light of the metal halide lamp and the radiated light of the halogen bulb can easily be uniformly applied to the entire irradiation surface of the apparatus, and the uniformity can be improved.

[0035]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the mixed light illuminating device of the present invention will be described below with reference to FIGS.

FIG. 1 is a schematic bottom view of a first embodiment of the mixed light illumination device of the present invention. This mixed light illuminating device includes a light source composed of a 1 KW metal halide lamp 1 and a 500 W halogen bulb 2. The metal halide lamp 1 and the halogen bulb 2 are housed and provided in a lighting fixture for a metal halide lamp and a lighting fixture for a halogen bulb, which will be described later, respectively.

The lighting device for metal halide lamp and the lighting device for halogen bulb are alternately arranged vertically and horizontally so as to be adjacent to each other. Although not shown, the mixed light illuminating device is provided with a lighting circuit capable of individually lighting the metal halide lamp and the halogen light bulb.

FIG. 2 is a partially cutaway side view showing a part of the first embodiment of the present invention. In the figure, reference numeral 1a denotes a metal halide lamp lighting fixture in which the metal halide lamp 1 is housed. This lighting device 1a for metal halide lamp is
A part of the inner surface is formed as a bowl-shaped reflecting surface 1b that optically opposes the light emitting portion of the metal halide lamp,
A socket 1c is housed in the base of the lighting device 1a for a metal halide lamp. A dichroic filter 3 is attached to the front surface of the reflecting surface 1b.

FIG. 3 is a partially cutaway side view showing another part of the first embodiment of the present invention. In the figure, 2a is a lighting fixture for a halogen bulb that accommodates a halogen bulb. This halogen lamp lighting fixture 2a is formed as a bowl-shaped reflecting surface 2b whose inner surface partially opposes the light emitting portion of the halogen bulb, and the socket 2c is provided at the base of the halogen bulb lighting fixture 2a. Is stored. Also, the reflective surface 2
The dichroic filter 4 is attached to the front surface of b.

The dichroic filters 3 and 4 are
A high-refractive index layer formed of titanium oxide (Ti02) or the like and silicon oxide (Si02) or the like on the surface of the front light-transmitting plate 3a formed of glass or the like attached to the closed portions of the reflecting surfaces 1b and 2b of each device. It is formed of an optical interference film in which the low refractive index layers formed of are alternately laminated.

FIG. 4 is a graph showing the radiant energy distribution with respect to the wavelength of light of the metal halide lamp used in the first embodiment of the present invention. From this graph, the metal halide lamp has an excessive radiant energy relative to sunlight at a wavelength of about 500 nm or less, and a wavelength of about 600 n.
It can be seen that the radiant energy is relatively insufficient with respect to sunlight at m or more.

In this embodiment, the radiant energy of the metal halide lamp and the halogen light bulb is controlled by the dichroic filters 3 and 4 so as to eliminate the excess and deficiency of the radiant energy. That is, the spectral distribution of each device is adjusted by adjusting the optical film thickness (film thickness × refractive index) of the high refractive index layer and the low refractive index layer of the light interference film of the dichroic filters 3 and 4, respectively.

FIG. 5 is a graph showing the spectral transmittance distribution of the dichroic filter of the lighting device 1a for a metal halide lamp according to the first embodiment of the present invention. From this graph, the characteristic of reducing the radiant energy having a wavelength shorter than about 500 nm is shown. You can see that it has.

FIG. 6 is a graph showing the spectral transmittance distribution of the dichroic fill of the lighting fixture 2a for a halogen bulb according to the first embodiment of the present invention.
It can be seen that it has a characteristic of reducing radiant energy having a wavelength shorter than m.

Therefore, the light having a wavelength shorter than 500 nm emitted from the metal halide lamp is attenuated, and the light having a wavelength shorter than 600 nm emitted from the halogen lamp is also attenuated. It is similar to light.

Further, the light in the wavelength range of 600 nm or more, which is insufficient in the radiated light of the metal halide lamp, is supplemented by the radiated light from the halogen bulb, so that radiated light extremely similar to sunlight can be obtained.

FIG. 7 is a graph showing the distribution of radiant energy with respect to the wavelength of radiated light of the lighting fixture for metal halide lamps of the first embodiment of the present invention.

As is apparent from this graph, radiant energy similar to that in the visible light wavelength range of sunlight is obtained from the metal halide lamp side.

FIG. 8 is a graph showing the distribution of radiant energy with respect to the wavelength of radiated light of the lighting fixture for a halogen bulb according to the first embodiment of the present invention.

As is clear from this graph, radiant energy similar to the radiant energy in the infrared wavelength range of sunlight is obtained from the halogen bulb side.

FIG. 9 is a graph showing the distribution of radiant energy with respect to the wavelength of radiated light according to the first embodiment of the present invention.
Here, A is the spectral distribution of sunlight, B is the spectral distribution of the mixed light illuminating device of this embodiment, C is the spectral distribution of the lighting fixture for the metal halide lamp of this embodiment, and D is the illumination of the halogen bulb of this embodiment. The spectral distribution of the instrument is shown.

As is clear from this graph, the mixed-light illumination device of this embodiment has a spectral distribution similar to that of sunlight, and the spectral distribution of sunlight is efficiently distributed over the visible light wavelength range to the infrared light wavelength range. It is possible to obtain radiant energy close to.

Then, in the above spectral distribution of sunlight,
Radiant energy (Pv) in the visible light wavelength range (wavelength 400 nm or more and less than 800 nm) and infrared light wavelength range (wavelength 800 nm or more and 2500 nm or less).
The ratio (Pv / Pi) of the radiant energy (Pi) is about 0.8, whereas the same ratio of the mixed light lighting device of this embodiment is about 0.75, which is an error relative to the ratio of sunlight. Is within 10%, and it is possible to realize a solar light similar to sunlight.

Next, a second embodiment of the present invention will be described. The basic structure of the mixed light illumination device of the present embodiment is the first
It is the same as the mixed-light illumination device of the embodiment, but the spectral transmittance distribution of the dichroic filter is different.

That is, the dichroic filter 3 provided in the opening of the lighting device 1a for metal halide lamp.
Is indium oxide (In2O3) and tin oxide (SnO2)
And a light interference film (ITO film). As a result, of the radiant energy of the metal halide lamp 1, light having a wavelength of 800 nm or more, which is mainly in the infrared light wavelength range or more, is attenuated. The dichroic filter 4 provided in the lighting fixture 2a for a halogen light bulb is provided with an optical interference film that reflects, of the radiant energy of the halogen light bulb 2, a wavelength of 700 nm or less, which is mainly in the visible light wavelength range or less.

FIG. 10 is a graph showing the distribution of radiant energy with respect to the wavelength of emitted light according to the second embodiment of the present invention. Here, A is the spectral distribution of sunlight, B is the spectral distribution of the mixed light illuminating device of this embodiment, C is the spectral distribution of the lighting fixture for the metal halide lamp of this embodiment, and D is the illumination of the halogen bulb of this embodiment. The spectral distribution of the instrument is shown.

As is apparent from this graph, the mixed-light illumination device of this embodiment has a spectral distribution similar to that of sunlight, and the spectral distribution of sunlight is efficiently distributed over the visible light wavelength range to the infrared light wavelength range. It is possible to obtain radiant energy close to.

Next, a third embodiment of the present invention will be described. The structure of the mixed light illumination device of the present embodiment is basically the same as that of the mixed light illumination device of the first embodiment, but the spectral transmittance distribution of the dichroic filter is different.

FIG. 11 is a graph showing the distribution of radiant energy with respect to the wavelength of light in the third embodiment of the present invention.

Lighting equipment 2a for halogen light bulb of this embodiment
The dichroic filter 4 attached to is configured to reflect light mainly in the near-infrared wavelength range, for example, 600 nm or less, of the light emitted from the halogen bulb so as not to pass through the dichroic filter 4. . Thereby, the irradiation light of the mixed-light illumination device of the present embodiment can approximate the radiant energy in the near-infrared light wavelength range to that of sunlight, and the radiant energy of the entire mixed-light illumination device also approximates that of sunlight. Can be made.

The mixed light illuminating device of this embodiment can be used as a pseudo-sunlight illumination for the test of the in-vehicle solar radiation sensor of the automobile air conditioner described above, and the near-infrared light which is the detection wavelength range of the in-vehicle solar radiation sensor. The radiant energy in the light wavelength range is similar to that of sunlight, and it is possible to create an environment that is very close to the test in a natural environment.

[0062]

According to the first aspect of the present invention, in the radiated light from the sunlight and the light source, the spectral distribution control means controls the radiated light so that the amount of radiated energy in a specific wavelength range is approximate. It is possible to provide a mixed light illumination device that can obtain radiant energy close to the spectral distribution of light.

According to the second aspect of the invention, the spectral distribution control means makes the radiant energy of the light emitted from the light source in the visible light region and the infrared light region extremely close to those energies of sunlight. Therefore, it is possible to provide a mixed light illumination device that can obtain radiant energy that is close to the spectral distribution of sunlight.

According to the third aspect of the present invention, the mixed light illumination in which the spectral distribution means of the metal halide lamp and the spectral distribution means of the halogen lamp are separately controlled to obtain radiant energy close to the spectral distribution of sunlight is provided. A device can be provided.

According to claim 4 or claim 5, the radiant energy of the light source is divided into a visible light wavelength region and an infrared light wavelength region, respectively, and the metal halide lamp side has a large radiant energy in the visible light region in terms of emission characteristics. Radiant energy that is close to the spectral distribution of sunlight in the visible wavelength range is obtained from halogen bulbs that emit a large amount of energy in the visible light region due to their emission characteristics. It is possible to provide a mixed light illuminating device that can obtain similar radiant energy.

According to the invention described in claim 6, of the radiant energy of the light source, it is divided into a visible light wavelength region and an infrared light wavelength region, respectively, and from the metal halide lamp side, the visible light wavelength region of sunlight is separated. It is possible to provide a mixed light illumination device that can obtain radiant energy close to the distribution and can obtain radiant energy close to the spectral distribution in the infrared light wavelength range of sunlight from the halogen bulb side.

According to the invention described in claim 7, the radiant energy of the light source is divided into a visible light wavelength region and an infrared light wavelength region, respectively, and from the metal halide lamp side, the visible light wavelength region of sunlight is spectrally separated. From the halogen bulb side, the radiant energy that approximates the distribution can be obtained from the radiant energy that approximates the spectral distribution in the infrared light wavelength range of sunlight.

Therefore, with respect to the radiant energy in the visible light wavelength range with respect to the radiant energy in the infrared light wavelength range in sunlight, the radiant energy in the visible light wavelength range with respect to the radiant energy in the infrared light wavelength range emitted from the light source. It is possible to provide a mixed light illumination device capable of keeping the ratio of 10% or less within 10%. .

According to the invention described in claim 8, claim 6
Alternatively, it is possible to provide a mixed-light illumination device that achieves the same effects as the invention described in item 7.

According to the invention described in claim 9, the radiant energy of the light source is divided into the whole wavelength range and the near infrared wavelength range, respectively. If the radiant energy that approximates the distribution is obtained from the other lamps, the radiant energy that approximates the spectral distribution in the near-infrared wavelength range of sunlight can be obtained. To provide each radiant energy efficiently at a ratio close to the ratio of the total radiant energy in the near-infrared light wavelength region of, for example, to provide a mixed light illuminating device suitable for environmental testing of a sensor for heat detection. You can

According to the tenth aspect of the invention, the radiant energy of the light source is divided into the entire wavelength range and the near infrared wavelength range, and the metal halide lamp mainly produces a spectral distribution in the entire wavelength range of sunlight. If the radiant energy approximated to the spectral distribution of the near-infrared light wavelength range of sunlight is obtained from a halogen bulb, the approximate radiant energy will be the near-infrared ray of the sun relative to the total radiant energy of all wavelength ranges of the sunlight. It is possible to provide a mixed lighting device that can efficiently obtain each radiant energy at a ratio close to the ratio of the total radiant energy in the light wavelength region.

According to the eleventh aspect of the present invention, it is possible to provide a mixed light illumination device having the same effect as that of the tenth aspect of the invention.

According to the twelfth aspect of the invention, the mixed light illuminating device capable of easily irradiating the radiated light of the metal halide lamp and the radiated light of the halogen bulb evenly on the entire irradiation surface of the device and improving the uniformity. Can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic bottom view of a first embodiment of a mixed light illumination device according to the present invention.

FIG. 2 is a partially cutaway side view showing a part of the first embodiment of the present invention.

FIG. 3 is a partially cutaway side view showing another portion of the first embodiment of the present invention.

FIG. 4 is a graph showing a radiant energy distribution with respect to the wavelength of light of the metal halide lamp used in the first embodiment of the present invention.

FIG. 5 is a graph showing a spectral transmittance distribution of a dichroic fill of the lighting device for a metal halide lamp according to the first embodiment of the present invention.

FIG. 6 is a graph showing a spectral transmittance distribution of a dichroic filter of the lighting fixture for a halogen bulb according to the first embodiment of the present invention.

FIG. 7 is a graph showing a distribution of radiant energy with respect to a wavelength of radiant light of the lighting equipment for metal halide lamps according to the first embodiment of the present invention.

FIG. 8 is a graph showing a distribution of radiant energy with respect to a wavelength of radiant light of the lighting fixture for a halogen bulb according to the first embodiment of the present invention.

FIG. 9 is a graph showing a distribution of radiant energy with respect to a wavelength of radiated light according to the first embodiment of the present invention.

FIG. 10 is a graph showing the distribution of radiant energy with respect to the wavelength of radiated light according to the second embodiment of the present invention.

FIG. 11 is a graph showing the distribution of radiant energy with respect to the wavelength of radiated light in the third embodiment of the present invention.

[Explanation of symbols]

 1 ... Metal halide lamp, 2 ... Halogen bulb, 3 ... Spectral distribution control means

Claims (12)

[Claims] 1. A light source comprising a plurality of lamps each emitting light having a different spectral distribution; a second light source for the total radiant energy of a first specific wavelength region in sunlight.
A plurality of the plurality of radiant energy sources are arranged such that the ratio of the total radiant energy of the second specific wavelength band to the total radiant energy of the first specific wavelength band emitted from the light source is approximate to the ratio of the total radiant energy of the specific wavelength band. And a spectral distribution control means for controlling the spectral distribution of at least one emitted light of the lamp. 2. A light source comprising a metal halide lamp and a halogen bulb; total radiation in a visible light wavelength range of 400 nm to less than 800 nm with respect to total radiant energy of sunlight in the infrared light wavelength range of 800 nm to 2500 nm. The error of the ratio of the total radiant energy in the visible light wavelength range to the total radiant energy in the infrared light wavelength range emitted from the light source is 10 with respect to the energy ratio.
%, And a spectral distribution control means for controlling the spectral distribution of the radiated light of at least one of the metal halide lamp and the halogen bulb so that the ratio is within%. 3. The mixed light illuminating device according to claim 2, further comprising spectral distribution means for controlling spectral distributions of light emitted from the metal halide lamp and the halogen bulb. 4. The spectral distribution control means for controlling the spectral distribution of the radiated light of the halogen bulb is composed of a reflection surface or a filter formed with an optical interference film for mainly controlling the wavelength of 600 nm or less of the radiated light of the halogen bulb. The mixed light illumination device according to claim 3, wherein 5. The spectral distribution control means for controlling the spectral distribution of the radiated light of the metal halide lamp is composed of a reflecting surface or a filter formed with an optical interference film for mainly controlling the wavelength of 500 nm or less of the radiant energy of the metal halide lamp. The mixed light illumination device according to claim 3, wherein 6. A spectral distribution control means for controlling a spectral distribution of radiated light of a metal halide lamp, wherein the spectral distribution control means is a light for mainly controlling an infrared light wavelength region or more in the radiant energy of the metal halide lamp. The mixed light illumination device according to claim 2, wherein the mixed light illumination device is a reflection surface or a filter having an interference film formed thereon. 7. The spectral distribution control means for controlling the spectral distribution of the radiated light of the halogen bulb is a reflection surface or a filter formed with an optical interference film for controlling the radiant energy of the halogen bulb mainly in the visible light wavelength range or less. Yes; The spectral distribution control means for controlling the spectral distribution of the radiated light of the metal halide lamp is a reflection surface or a filter formed with an optical interference film that mainly controls the infrared light wavelength region or more of the radiant energy of the metal halide lamp. And;
The mixed light illumination device according to. 8. The mixed light illumination device according to claim 6, wherein the light interference film is an ITO film. 9. A light source including a plurality of lamps each having a different spectral distribution; and a ratio of the total radiant energy in the near-infrared light wavelength region to the total radiant energy in the entire wavelength region in sunlight. The spectral distribution of at least one radiant light of the plurality of lamps so that the ratio of the total radiant energy other than the near-infrared light wavelength region to the total radiant energy of all wavelength regions emitted from the light source is approximate. And a spectral distribution control means for controlling the mixed light illuminating device. 10. A light source comprising a metal halide lamp and a halogen bulb; the ratio of the total radiant energy in the near infrared light wavelength range to the total radiant energy in the total wavelength wavelength range in sunlight, The radiant light of at least one of the metal halide lamp and the halogen light bulb is adjusted so that the error of the ratio of the total radiant energy of the entire wavelength range emitted from the light source to the total radiant energy other than the near infrared wavelength range is within 10%. And a spectral distribution control means for controlling the spectral distribution. 11. A light source including a metal halide lamp and a halogen bulb; the ratio of the total radiant energy in the near infrared light wavelength region to the total radiant energy in the entire wavelength region emitted from the light source is approximately 20%. And a spectral distribution control means for controlling the radiated light of the halogen bulb below the near-infrared light wavelength range. 12. The mixed light illumination device according to claim 1, wherein the metal halide lamp and the halogen bulb are arranged adjacent to each other.