JP2000076903A - Mixed-light lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mixed-light lighting system capable of approximating the spectral distribution of the solar light in a specific range of wavelength, as well as capable of approximating the reference solar light. SOLUTION: This device is provided with a pseudo-solar light source which includes a metal halide lamp and a halogen lamp, a spectral distribution control means where the ratio of the radiant energy in a visible range to that in an infrared range emitted from the metal halide lamp falls in the range of 10% below to 10% above the ratio (specific energy) of the radiant energy, in the visible light range of 400 nm to 750 nm to the radiant energy in the infrared range of 750 nm to 2,500 nm in the reference solar light, and a spectral distribution control means which transmits the radiant energy ranging from 650 nm to 1,100 nm through the halogen lamp, and where the ratio of the radiant energy in the visible light range from 650 nm to 750 nm to the radiant energy in an infrared light range from 750 nm to 1,100 nm is in the range of 10% below to 10% above the required energy.

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixed lighting device capable of obtaining radiant energy similar to sunlight.

2. Description of the Related Art Conventionally, as this kind of mixed light illumination device,
There is one described in JP-A-59-78493. This mixed-light illumination device is a light source obtained by combining a plurality of metal halide lamps and a plurality of halogen bulbs, and power is supplied to the metal halide lamps and the halogen bulb at a predetermined ratio. The irradiating light as the device has a radiant energy distribution with respect to the wavelength that attempts to approximate sunlight.

However, in the conventional mixed light illumination device, the purpose is to simply approximate the radiant energy thereof to the radiant energy distribution of sunlight. Does not provide accurate radiation energy in that wavelength range.
In addition, since the device itself also specifies the total input power ratio between the metal halide lamp and the halogen bulb, it is extremely difficult to obtain an accurate amount of radiant energy in a specific wavelength range when limited to a specific wavelength range. is there. That is, light mixture with reference sunlight in this case (light source A + B)
FIG. 3 shows the radiation intensity (μW / square cm) of the sample (at 1000 lx). According to this graph, in the conventional mixed-light illumination device, in a wavelength region around 750 nm, a wavelength region showing a spectral distribution lower than the radiation intensity of the reference sunlight exists. Then, in order to obtain light emission approximating the spectral distribution of sunlight over the entire wavelength range of the emitted light, a xenon lamp was used as the light source, or several cut filters with different spectral transmittances were combined. A halogen lamp or the like is required. In this case, it is extremely difficult to obtain high illuminance required as pseudo sunlight due to its low luminous efficiency. An object of the present invention is to provide a mixed-light illumination device that can approximate the reference sunlight and can also approximate the spectral distribution of sunlight in a specific wavelength region.

According to the first aspect of the present invention, a sunlight pseudo light source including a metal halide lamp and a halogen lamp is provided;
The ratio of the radiant energy in the visible light region (specific energy) specified in the range of 400 nm to 750 nm to the radiant energy in the infrared light region specified in the range of not less than 2500 nm and the infrared light region radiated from the metal halide lamp is described. A spectral distribution control means disposed so that the ratio of the radiant energy in the visible light region to the radiant energy of the halogen lamp is within 10% in the vertical direction;
While transmitting radiant energy of not less than 1 nm and not more than 1100 nm, the ratio of the radiant energy of the visible light region defined by 650 nm to 750 nm to the radiant energy of the infrared light region defined by 750 nm to 1100 nm is above and below the specific energy. And a spectral distribution control means disposed so as to be within 10%. Here, the type, shape, size (lamp power), and the like of the metal halide lamp and the halogen lamp are not particularly limited, and the mounting structure and the positional relationship are not particularly limited. The spectral distribution control means provided on the lamp may selectively irradiate radiant energy in a specific wavelength range to the surface to be irradiated from radiant energy light having an original spectral distribution radiated from the lamp. There are no particular limitations on the structure of the lamp bulb, such as a lamp bulb provided with an ITO film or the like that reflects only energy in the infrared region, a reflector disposed behind the lamp bulb, and a filter disposed in front of the lamp and the reflector. Also, it is not necessary to provide it for every lamp. According to a second aspect of the present invention, in the mixed light illuminating apparatus of the first aspect, the spectral distribution control means is provided independently for each lamp. Thus, the spectral distribution control means is adjusted separately for each lamp, approximates the spectral distribution of sunlight, and can obtain the energy ratio according to claim 1.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An insolation device as a mixed light illumination device according to an embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a bottom view of a solar radiation device which is a mixed light illumination device according to an embodiment of the present invention. As shown in the figure, the solar radiation device of the present embodiment is a device A having a metal halide lamp as a light source A, and an I as spectral distribution control means.
The apparatus comprises a device B having a metal halide lamp, which is a light source B having a filter with a TO film, and a device C having a halogen lamp with a dichroic mirror.
FIG. 2 shows the radiation intensity (μW / square cm) (10 W
It is a graph which shows (00 lx time). In this graph, “standard sunlight” indicates the spectral distribution of sunlight as defined by the CIE, and the spectral radiant intensity of the solar radiation device of the present embodiment is the spectral radiant intensity of the light source A, the light source B, and the halogen lamp fixture C. The sum is shown. The device A having a metal halide lamp without a filter used in the present embodiment has a smaller total energy amount of 750 nm or less with respect to the total radiant energy amount of 750 nm or more than the reference sunlight. Although this ratio differs depending on the substance sealed in the lamp inner tube, this tendency is exhibited in general metal halide lamps. Therefore, radiant energy of 800 nm or more is cut (reflected).
By providing an ITO film-equipped filter on some of the appliances, an illuminating device that cuts infrared radiation energy and has spectral energy within 10% of the upper and lower energy ratios with respect to each energy ratio of sunlight can be obtained. That is, the filter with the ITO film, which is the spectral distribution control means, is 750 n in sunlight.
The ratio of the radiant energy in the visible light region defined by 400 nm to 750 nm to the radiant energy in the infrared light region defined by m or more and 2500 nm or less (specific energy) is the infrared light emitted from the metal halide lamp. The ratio of the radiant energy in the visible light region to the radiant energy in the region is set to be within 10% in the vertical direction. However, the radiant energy of 650 to 1000 nm is relatively small from the spectral distribution unique to the metal halide lamp.
650 nm to 75 with respect to radiant energy in the infrared region defined by 750 nm to 1100 nm while transmitting radiant energy of 1750 nm or less.
A dichroic filter, which is a spectral distribution control means, is provided so that the ratio of radiant energy in the visible light region defined at 0 nm or less is within 10% of the specific energy. Therefore, the radiant energy of the halogen lamp is also controlled by the dichroic filter provided in front of it.
Since the specific energy ratio between the visible region and the infrared region coincides with the reference sunlight, the mixed device as a whole satisfies the ratio. Also, the valley in the wavelength range of 750 nm to 1100 nm can be approximated to the reference sunlight by adjusting the energy emission amount of the halogen lamp. By adjusting in this way, particularly when used for growing plants, the wavelength range around 750 nm which is preferred by plants is compensated, and this case is more preferable. In addition, about 100,000 lx of high illuminance can be obtained as pseudo sunlight.

According to the present invention, the total radiant energy of sunlight can be approximated, and the spectral distribution of sunlight can be approximated even in a specific wavelength region.

[Brief description of the drawings]

FIG. 1 is a bottom view of a solar radiation device which is a mixed light illumination device according to an embodiment of the present invention.

FIG. 2 shows the radiation intensity (μW / square c) of the solar radiation device.
m) (at 1000 lx).

FIG. 3 is a graph showing the radiation intensity (μW / square cm) (at 1000 lx) of reference sunlight and mixed light (light source A + B).

[Explanation of symbols]

A: Appliance having a metal halide lamp B: Appliance having a metal halide lamp with spectral distribution control means C: Appliance having a halogen lamp with a dichroic mirror

Claims (2)

[Claims] 1. A sunlight simulated light source including a metal halide lamp and a halogen lamp; and 400 to 75 with respect to radiant energy in the infrared region defined by 750 to 2500 nm in reference sunlight.
The ratio of the radiant energy of the visible light region to the radiant energy of the infrared light region radiated from the metal halide lamp is within 10% of the radiant energy ratio (specific energy) of the visible light region defined at 0 nm or less. A spectral distribution control means disposed so as to transmit radiant energy of 650 nm or more and 1100 nm or less to the halogen lamp, and 750 nm or more and 1100 n.
m, the ratio of the radiant energy in the visible light region defined by 650 nm to 750 nm to the radiant energy in the infrared light region defined by m
Spectral distribution control means arranged to be within 0%;
A mixed light illuminating device comprising: 2. The apparatus according to claim 1, wherein the spectral distribution control means is provided independently for each lamp.
A mixed light lighting device according to claim 1.