JPH097415A - Color temperature variable light projector - Google Patents

Abstract

PURPOSE: To attain size reduction, simplify the constitution, and inexpensively vary a color temperature by projecting the separated transmitted light and reflected light respectively different in a light color through a light quantity adjusting part, a color mixing part and a light projecting part. CONSTITUTION: The light source light from a main light source 1 is separated into two parts of the yellow light in the transmitting direction and the blue light in the reflecting direction (the vertical direction) on a blue reflecting type dichroic mirror 4. A light quantity adjusting part 5 adjusts a quantity of light of the yellow light and the blue light. A color mixing part 6 mixes the yellow light and the blue light with each other. A light projecting part 7 projects the color mixed light. When directivity and color mixing performance of the radiated light are highly valued, it is desirable that, for example, optical paths of two light of the blue light and the yellow light are made almost parallel to each other by devising the constitution of the light projecting part 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light projecting device for producing and illuminating various living spaces, and more particularly to a color temperature variable light projecting device for varying the color temperature of irradiation light.

[0002]

2. Description of the Related Art In recent years, in various living environments, comfortable lighting suitable for each environment is desired. Lighting color control and color temperature control are one of the necessary elemental technologies for that.
For example, it is intended to change the color and color temperature of the illumination according to personal preference, atmosphere, weather, etc. under a certain environment. Up to now, many technologies have been proposed to make the illumination color variable, but when roughly classified, the following 3
Become one Also, the method for changing the color temperature usually belongs to the following categories. (1) A dimming and color-mixing method in which a plurality of fluorescent lamps each having a lighting device and a dimming device or a plurality of fluorescent lamps having different spectral intensity distributions are used, and each of them is dimmed and mixed. (2) A single lamp control system in which one lamp is used and the excitation ultraviolet wavelength distribution is changed by a driving method suitable for the enclosed gas to change the emission characteristics of the phosphor. (3) A method in which an optical material other than a lamp such as a filter or a dichroic mirror is used and an optical material that changes colors is used.

Japanese Patent Application Laid-Open No. 6-44806 discloses an example of using the dichroic mirror according to the above (3). As shown in FIG. 16, the basic configuration of this color light illumination device is composed of three light sources 20a, 20b, 20c and two dichroic mirrors of a blue reflection type dichroic mirror 21a and a green reflection type dichroic mirror 21b.
Although the color light of any color mixture is emitted from the emission port 22 by adjusting the light amount of each light source, the color temperature is not mentioned in this example. As an example of changing the color temperature, there is, for example, Japanese Patent Application Laid-Open No. 6-260295 shown in FIG. 17 similar to the above (1), and its basic configuration is the first fluorescent lamp 23 and the second fluorescent lamp having different correlated color temperatures. The first and second lighting devices 25 and 26 dimming and lighting 24, respectively, to dimming and mixing colors of two types of lamps to change the color temperature. 27 is a remote control receiver.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
According to the dimming and color mixing system such as No. 295, basically, as many lamp lighting devices and dimming devices as the number of lamps are required, and when automatically controlling colored light, a control device for controlling each is required. Become. Further, in order to completely mix colors in this method, it is necessary to widen the distance between the diffuser plate and the lamp, and it is difficult to make it compact. On the other hand, regarding the example using the dichroic mirror of JP-A-6-44806, when viewed as one actual lighting fixture, a plurality of lighting devices and dimmers are required,
It is hard to say that the entire luminaire is very large and can be constructed at low cost. In addition, this method requires two dichroic mirrors and three light sources in order to arbitrarily change the color, and the number of components is large. However, if attention is paid only to the color temperature change by the method using the dichroic mirror, it can be realized with, for example, one blue reflection type dichroic mirror, so that the configuration is simplified as compared with the conventional techniques such as the above two examples. You can fully expect compactness.

The present invention has been made in consideration of the above-mentioned problems and has been made to improve the problems, and it is possible to reduce the size, the structure is simple, and the color temperature variable light projection realizes the color temperature variable at low cost. The purpose is to get the device.

[0006]

In order to achieve the above object, a color temperature variable light projecting apparatus according to the present invention comprises a light source section including a light source, a reflector, a light source lighting circuit, and the like. In a light projecting device equipped with a blue reflection type or yellow reflection type dichroic mirror that decomposes the emitted light into a blue light component and a yellow light component, of the transmitted light and the reflected light of different light colors decomposed by the dichroic mirror, respectively. Of these, at least one of the light quantity adjusting section that makes the light quantity of the color light variable, the color light obtained by passing through the light quantity adjusting section, and the other color light obtained by passing the light quantity adjusting section or not passing through. And a light projecting unit for projecting the mixed color light.

The light quantity adjusting means of the light quantity adjusting section is
It is possible to selectively adjust the light amount of only one of the yellow light component and the blue light component which are separated by the dichroic mirror.

The light source section includes a plurality of light sources having different relative spectral radiation intensity distributions, and one of the light sources can be selected as a main light source. Preferably, a turntable equipped with the plurality of light sources is provided.

The light source section includes a light control means capable of adjusting the amount of light of the main light source inside the light source.

The light quantity adjusting means sets the ratio (transmittance) of the light quantity emitted from the light quantity adjusting section to the light quantity entering the light quantity adjusting section from the main light source of the light source section in the range of 0 to 100 (%). It is possible to control continuously.

The light quantity adjusting means changes the transmittance of the color light separated by the dichroic mirror and also changes the relative spectral transmittance.

The color mixing means of the color mixing section is provided with a plurality of optical fiber cables for condensing and mixing the two lights of the blue light and the yellow light after passing through the light quantity adjusting unit.

The dichroic mirror is attached so that the incident angle of the light from the main light source of the light source section can be changed, and the dichroic mirror is adjusted in accordance with the light beam directions of the transmitted light and the reflected light obtained through the dichroic mirror. The position of the color mixing unit is changed according to the position of the light amount adjusting unit and the light ray direction of the light emitted from the light amount adjusting unit.

[0014]

In the variable color temperature projector of the present invention configured as described above, the light emitted from the light source unit is converted into the blue light component and the yellow light component by the blue reflection type or yellow reflection type dichroic mirror. Of the transmitted light and the reflected light having different light colors, the light quantity of at least one of the separated light rays is changed in the light quantity adjusting section, and the color light obtained by passing through the light quantity adjusting section and the light quantity adjusting section The other color light passing through or not passing is mixed by the color mixing section, and the mixed color light is projected from the light projecting section. For this reason,
The color temperature can be changed with one type of dichroic mirror, and the chromaticity can be changed within the correlated color temperature region on the chromaticity coordinates with a simple configuration having a small number of constituent parts.

The light quantity adjusting means of the light quantity adjusting section selectively adjusts the light quantity of only one of the yellow light component and the blue light component which is separated into two by the dichroic mirror. By decreasing the amount of yellow light, the chromaticity can be changed from white to blue in the correlated color temperature region or in the vicinity thereof, while
By decreasing the amount of blue light, the chromaticity can be changed from white to yellow. Therefore, the range of the variable color temperature region can be set in the blue direction or the yellow direction by selectively changing the light color that controls the light amount.

The light source section includes a plurality of light sources each having a different relative spectral radiation intensity distribution, and one of the light sources is selected and used as a main light source to switch the type of the light source to obtain the relative spectral radiation intensity distribution. It is possible to change and change the locus of the color temperature variable within the correlated color temperature region of the light color of the emitted light. Further, by providing the rotary table with a plurality of light sources, it is possible to easily select main light sources having different relative spectral radiation intensity distributions.

The light source unit can change the brightness of the irradiation light by providing a light control unit capable of adjusting the light amount of the main light source in the light source unit.

The light quantity adjusting means continuously sets the ratio (transmittance) of the light quantity emitted from the light quantity adjusting section to the light quantity entering from the main light source of the light source section to the light quantity adjusting section from 0 to 100 (%). The controllability allows the chromaticity of the irradiation light to be continuously changed on the variable chromaticity locus within the correlated color temperature region determined by other conditions, and an arbitrary correlated color on the locus can be changed. The temperature can be set.

The light quantity adjusting means can change the transmittance of the color light decomposed by the dichroic mirror and the relative spectral transmittance, thereby changing the transmittance of the color light and the light color of the transmitted light. It is possible to change the variable color locus of the light color of the light that is selectively irradiated.

Since the color mixing means of the color mixing section is provided with a plurality of optical fiber cables for collecting and mixing the two lights of the blue light and the yellow light after passing through the light quantity adjusting section, the color mixing section collects them with high efficiency. Light and color can be mixed.

The dichroic mirror is attached so that the incident angle of the light from the main light source of the light source unit is variable, and the light quantity adjusting unit is adjusted in accordance with the light beam direction of the transmitted light and the reflected light obtained through the dichroic mirror. By changing the position of the color mixing part in accordance with the position of and the light ray direction of the light emitted from the light amount adjusting part, it is possible to change the chromaticity locus to be changed in the correlated color temperature region on the chromaticity coordinate. .

[0022]

【Example】

Embodiment 1 FIG. First Embodiment FIG. 1 is a diagram showing a configuration of a variable color temperature projection device according to a first embodiment of the present invention. The configuration of the present embodiment has a main light source 1, a light source unit 3 including a reflection plate 2, a blue reflection type dichroic mirror 4, a light amount adjusting unit 5 capable of adjusting an incident light amount, and a color mixing unit for mixing yellow light and blue light. 6 and a light projecting unit 7 that projects mixed color light. Here, the dichroic mirror is a mirror made of different dielectric multilayer thin films, which reflects light in a specific wavelength range and transmits light in other wavelength ranges. The spectral characteristic of the blue reflection type dichroic mirror is as shown in FIG. 3, for example. In the example of FIG. 3, light in the green and red wavelength ranges is transmitted, but light in the blue wavelength range is not transmitted. Therefore, in the apparatus of FIG. 1, the blue light is transmitted by the blue reflection type dichroic mirror 4 and the blue light is reflected. The main light source 1 of the light source unit 3 is the A light source (color temperature 2856).
(K) gas-filled coil filament bulb) (see FIG. 6).

FIG. 2 shows the structure of the projector of the present invention when the structure based on FIG. 1 is simplified. In the following, the structure of the projector of the present invention will be described based on the structure of FIG. The effect is shown by simulation. In FIG. 2, the blue reflection type dichroic mirror 4 is set at an angle of 45 degrees with respect to the direction of the light beam from the main light source 1, and the light source light is yellow on the blue reflection type dichroic mirror 4 in the transmission direction (straight direction). It is divided into light and blue light in the reflection direction (vertical direction). The light quantity adjusting means 8 of the light quantity adjusting section is a means for adjusting the light quantity of yellow light, and for example, a plurality of transmitted light quantity reducing filters having different transmittances (considering an ideal material in which the spectral reflectance is constant regardless of wavelength) 8a to 8d. Adjust the amount of light by moving up and down, or moving left and right as shown in the figure.
The light amount adjusting means 8 can also be installed on the reflected light (blue light) side. The color mixing unit 9 of the color mixing unit reflects blue light by one mirror 9a to mix two lights having different light colors (yellow light and blue light), and the light projecting unit 10 of the light projecting unit 10 Sets the light projecting lens 10a.

As described above, in the projector of the present invention, one type of dichroic mirror (blue reflection type or yellow reflection type) is used.
When the directivity and the color mixing property of the emitted light are emphasized, by devising the configurations of the color mixing unit 6 and the light projecting unit 7, for example, two lights of blue light and yellow light can be used. It is desirable to make the optical paths close to parallel.

FIG. 4 shows the result of calculating the chromaticity coordinate values and simulating the locus when the amount of transmitted light is changed in the apparatus of FIG. 2 (symbol of Δ). The chromaticity calculation uses a 10-degree visual field color matching function at intervals of 5 (nm) (the same applies to the chromaticity calculation below), and the influence of the lens system 10a is not taken into consideration. The chromaticity is (0.45, 0.4) ~ as the amount of yellow light is reduced.
It can be seen that it changes linearly to (0.25, 0.21) and then changes to about 3000 to ∞ (K) at the color temperature. The locus of chromaticity change is not on the color temperature curve, but almost always changes in the correlated color temperature region. Therefore, the color temperature can be surely changed even with a very simple structure as shown in FIG. In addition, using the principle of this projector,
If a red reflection type is used for the dichroic mirror, it is possible to provide a variable chromaticity projector of red to green with a locus substantially perpendicular to the above locus.

Example 2. In the floodlighting device of FIG. 2, since the light amount adjusting means 8 is installed on the yellow side and the light amount of yellow light is changed, the color temperature variable range becomes a high color temperature as shown in FIG. However, conversely, the color temperature can be changed on the low color temperature side by installing the light amount adjusting means 8 on the blue side and changing the light amount. Figure 4 shows the simulation result in that case.
Is indicated by ▲. The color temperature is clearly different from the case where the light amount is changed on the yellow side (marked by Δ in FIG. 4), and the low color temperature side (2000
It becomes variable in the range of up to 3000 (K). Therefore, in the light projecting device of the present invention, for example, as shown in FIG. 5, the light quantity adjusting means 8 of the transmitted light quantity adjusting section is rotatably arranged around the blue reflection type dichroic mirror 4, and either blue light or yellow light is emitted. If it is configured to select one optical path,
By selecting the optical path, the variable range of the color temperature can be set to the high color temperature side or the low color temperature side. In addition, in the apparatus of FIG.
A C (electrochromic) filter 8e is used.

Embodiment 3 FIG. In the apparatus of Examples 1 and 2, the main light source 1 of the light source section is the A light source, but as can be seen from FIG. 4, the color temperature can be changed by selectively using the type of the main light source of the light source section. . Main light source is the above A light source and D65 light source (fluorescent lamp with color temperature 6500 (K))
Figure 4 shows the result of simulation in (A light source: △ ▲
Mark, D65 light source: ○ ● mark). Figure 6 shows the spectral intensity distributions of the A and D65 light sources (Mitsuo Ikeda: Basics of Color Engineering, p.
76, excerpt from Asakura Shoten Co., Ltd.) is clearly different. Therefore, as is clear from the result of FIG. 4, the variable color temperature locus varies greatly depending on the type of light source, that is, the emission spectral distribution characteristic of the light source. The larger the distribution intensity at long wavelengths, the lower the color temperature becomes. The shorter the wavelength and the larger the wavelength, the higher the temperature. Therefore, for example, as shown in FIG. 7, the light source unit is provided with a plurality of light sources 11a,
If the main light source can be selectively used from among the components 11b and 11c and the turntable 12, the projected color and its color temperature can be changed.

Further, in FIG. 8, the light source luminance is 45 (cd /
m ² ) When the EC filter 8e constituting the transmitted light amount adjusting section in the light projecting device of FIG. 7 is set to be constant on the yellow light side or on the blue light side, the brightness of the mixed light after color mixing is kept constant. It is a result of simulating two types of cervical light sources. From the results shown in FIG. 8, when using a plurality of light sources having a constant brightness, in consideration of high efficiency, when the x chromaticity coordinate is 0.30 to 0.45, a D65 light source, 0.45 to 0.5
Up to 2 can be used separately from the A light source.

Further, for example, in the apparatus shown in FIGS. 1, 2, 5 and 7, by providing the light source section with the light control means capable of adjusting the brightness of the main light source, the brightness can be changed according to the color temperature. If the maximum output of the light source is set to a large value and the usage level is set to about several tens of percent in high efficiency areas depending on the color temperature, for example, dimming can be performed in areas where high color temperature efficiency is poor. Can increase the brightness setting. On the other hand, the brightness can be adjusted according to the color temperature used. Further, if the radiation spectral distribution is constant regardless of the brightness, the brightness can be changed without changing the chromaticity and the color temperature.

Example 4. If the transmittance is continuously changed between 0 and 100 (%) in the transmitted light amount adjusting section, the chromaticity and the color temperature can be continuously changed, and further, the transmitted light amount adjusting section can change the relative value together with the transmitted light amount. If the spectral transmittance can be changed, the locus of chromaticity can be changed. E is one of the materials for adjusting the amount of transmitted light having these characteristics.
There is C (electrochromic). EC has a property of changing its spectral characteristics as shown in FIG. 9 when the amount of accumulated charge is changed by applying a DC voltage thereto, and as a result, its color also changes when the amount of transmitted light changes. Figure 10 shows EC
It is the result of theoretically calculating the change of xy chromaticity coordinates when voltage is applied to the filter for two types of light sources (A light source and D65 light source). When the voltage is increased, the light source A is 3000 to 5000 (K), and the others are 5000 to 5000
It was found that the color shifts to ∞ (K), and the color obviously shifts to the high color temperature direction as the amount of transmitted light decreases.

In order to confirm the effectiveness of the present invention and the effect of a material such as EC, a light projecting device shown in FIG. 11 was prototyped based on the configuration of FIG. 2 and using an EC filter 8e in the transmitted light amount adjusting section. . An EC filter 8e is installed on the yellow light side that has passed through the blue reflection type dichroic mirror 4, and the direct current voltage applied to the EC filter 8e is controlled to change the yellow light transmission amount and chromaticity. Colors were mixed and the white plate 13 was irradiated. The light source is the A light source.

FIG. 12 shows changes in the xy chromaticity values of the light (color-mixed light) emitted by this prototype device. In the figure, the symbol ⋄ indicates the measured value in the prototype device, the symbol Δ indicates the simulation result when the ideal material is used for the transmitted light amount adjusting portion, and the symbol ◯ indicates the simulation result when the EC filter is used. When the pressurizing voltage of the EC filter is changed, both the measured value and the simulation result show that the chromaticity changes within a relative color temperature range of approximately 3000 to 5000 (K).
That is, it can be said that the color can be changed between the light bulb color and the neutral white. Further, in the simulation, the effect of using the EC filter clearly appears in the chromaticity locus, as can be seen by comparison with the case of using the ideal material. The measured value is not as good as the simulation, but the effect can be recognized. Therefore, effective use of a material whose relative spectral transmittance changes according to the adjustment of the light amount broadens the range of design for realizing the color temperature. Further, since the human color temperature discrimination threshold is about 5.5 milled red (milled is the reciprocal of the color temperature (K)), a material such as an EC filter that can continuously change the light transmittance is used. If the control is performed below the threshold, the color temperature can be changed continuously and smoothly without being noticed by the human side when setting the color temperature.

Example 5. FIG. 13 shows another embodiment relating to the color mixing of this light projecting device. A plurality of optical fiber cables 14a and 14b are used for the color mixing section, and the yellow light after passing through the transmitted light amount adjusting section and the blue light of the reflected light are collected and mixed, and then the light is projected from the light projecting section. By using an optical fiber cable, light can be efficiently collected, and unlike the image display device, this projector does not require resolution, so there is no need to reduce the diameter of the cable so much.
In addition, one end of each of the optical fiber cables 14a and 14b is connected to each of the light receiving plates 15a and 15b, and the other end thereof is connected to the common light projecting plate 15c to form the color mixing section 6.

Embodiment 6 FIG. Dichroic mirrors have the property that the colors of transmitted light and reflected light change when the incident angle of light changes. FIG. 15 shows the measured values of the chromaticity of blue light and yellow light when the light source A is used as the light source and the angle is changed. Therefore, when changing only the light amount without changing the chromaticity in the transmitted light amount adjusting section, The chromaticity locus to take can be said to be on the straight line connecting the two points in the figure. When the incident angle of light on the dichroic mirror is changed, the reflected light changes its traveling direction according to the law of reflection. Therefore, in the light projecting device of the present invention, the angle of the dichroic mirror 4 is variable as shown in FIG. 14, and the position of the color mixing portion or the like is made to follow in accordance with the reflection direction of the dichroic mirror 4. You can change the color temperature with.

[0035]

Since the variable color temperature projector of the present invention is constructed as described above, it has the following effects.

The radiated light from the light source section is decomposed into a blue light component and a yellow light component by one kind of blue reflection type or yellow reflection type dichroic mirror, and among the separated transmitted light and reflected light of different light colors. , Changing the light quantity of at least one of the color lights in the light quantity adjusting section, and mixing the color light obtained by further passing through the light quantity adjusting section and the other color light obtained through or without passing through the light quantity adjusting section Mixed with
Since the mixed color light is projected from the light projecting section, it is possible to provide a variable color temperature projecting apparatus which has a simple structure, is inexpensive, and can be miniaturized, and can be applied to all kinds of stores, homes, offices, etc. A comfortable lighting space can be produced in the living space.

Since the light quantity adjusting means of the light quantity adjusting unit can selectively adjust the light quantity of only one of the yellow light component and the blue light component which is separated into two by the dichroic mirror, the light amount adjusting means is variable. The color temperature range can be selectively set in the blue or yellow direction.If you set it in the blue direction, you can set the color of the emitted light between white, neutral white, and light source colors, and in the yellow direction. It can be obtained in white, warm white and light bulb colors.

Since the light source section is provided with a plurality of light sources each having a different relative spectral radiation intensity distribution, and one of the light sources can be selected as the main light source, the type of light source is switched to change the relative spectral radiation intensity distribution. By doing so, it is possible to change the color temperature variable locus taken in the correlated color temperature region of the light color of the emitted light. For example, if the emission brightness of each of the plurality of light sources is constant, the light is emitted from the light emitting port. The chromaticity can be changed within the correlated color temperature region without largely changing the brightness of the light color. Further, since the rotary table is provided with a plurality of light sources, it is possible to easily select main light sources having different relative spectral radiation intensity distributions.

Since the light source unit is equipped with the light control means for adjusting the light amount of the main light source in the light source unit, the irradiation brightness is adjusted by the color temperature of the irradiation according to the atmosphere of the environment in which the apparatus is used. can do.

The light quantity adjusting means continuously sets the ratio (transmittance) of the light quantity emitted from the main light source of the light source section to the light quantity adjusting section from 0 to 100 (%). Since the color temperature can be continuously controlled, it is possible to change the color temperature continuously in an illumination environment where a gradual color temperature change is desired.

Since the light quantity adjusting means changes the transmittance of the color light decomposed by the dichroic mirror as well as the relative spectral transmittance, it is possible to change the transmittance of the color light and the light color of the transmitted light. Therefore, for example, when the transmittance is decreased and the relative spectral transmittance is increased on the short wavelength side, the light color of the light passing through the light amount adjusting means shifts its chromaticity in the blue direction, and as a result, the light color after the color mixture is achieved. Also shifts to the blue direction. In this way, the variable chromaticity locus of the light color of the emitted light can be changed as a result.

Since the color mixing means of the color mixing portion is composed of a plurality of optical fiber cables for collecting and mixing the two lights of the blue light and the yellow light after passing through the transmitted light amount adjusting part, the light can be condensed with high efficiency. It is possible to project colored light with high efficiency. Also,
It is possible to increase the color mixing property by reducing the cable diameter, but unlike the image presentation device, generally, high resolution is not required, and therefore the diameter of the cable used does not have to be so large.

The dichroic mirror is attached so that the incident angle of the light from the main light source of the light source section can be varied, and the light amount is adjusted according to the light direction of the transmitted light and the reflected light obtained through the dichroic mirror. Since the position of the color mixing section is changed according to the position of the section and the light ray direction of the light emitted from the light quantity adjusting section, the color reproduction area or chromaticity locus of the irradiated light can be changed.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a color temperature variable light projecting apparatus according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing a simplified configuration of FIG.

FIG. 3 is a diagram showing an example of spectral transmittance of a blue reflection type dichroic mirror.

FIG. 4 is a diagram showing a simulation result of a chromaticity locus in the apparatus of FIG.

FIG. 5 is a configuration diagram of a color temperature variable light projector according to a second embodiment of the present invention.

FIG. 6 is a diagram showing a spectral intensity characteristic of a light source.

FIG. 7 is a configuration diagram of a variable color temperature projection device according to a third embodiment of the present invention.

8 is a diagram showing a simulation result and a measured value of a luminance characteristic in the device of FIG.

FIG. 9 is a diagram showing spectral characteristics of an EC filter.

FIG. 10 is a diagram showing how a color changes when an EC filter is used.

FIG. 11 is a configuration diagram of a color temperature variable light projector according to a fourth embodiment of the present invention.

FIG. 12 is a diagram showing a simulation result of a chromaticity locus in the apparatus of FIG.

FIG. 13 is a configuration diagram of a variable color temperature light projector according to a fifth embodiment of the present invention.

FIG. 14 is a configuration diagram of a variable color temperature light projector according to a sixth embodiment of the present invention.

FIG. 15 is a diagram showing changes in chromaticity when the angle of the blue reflection type dichroic mirror is changed.

FIG. 16 is a configuration diagram of a conventional lighting fixture.

FIG. 17 is a configuration diagram of a conventional lighting fixture.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 main light source, 2 reflection plate, 3 light source section, 4 blue reflection type dichroic mirror, 5 transmitted light quantity adjusting section, 6 color mixing section, 7 light projecting section, 8 light quantity adjusting means, 8a-8d transmitted light quantity reducing filter, 8e EC filter , 9 color mixing means,
9a mirror, 10 light projecting means, 10a light projecting lens, 11a to 11c light source, 12 turntable, 14a, 1
4b optical fiber cable, 15a, 15b light receiving plate,
15c Floodlight plate.

Claims (9)

[Claims] 1. A light source section composed of a light source, a reflector, a light source lighting circuit, and the like, and a blue reflection type or yellow reflection type dichroic mirror for decomposing light emitted from the light source section into a blue light component and a yellow light component. In a floodlighting device comprising: a light amount adjusting unit for changing the light amount of at least one color light of the transmitted light and the reflected light having different light colors decomposed by the dichroic mirror, and the light amount adjusting unit that passes through the light amount adjusting unit. A color mixing unit that mixes the color light obtained as a result with another color light that passes through or does not pass through the light amount adjusting unit; and a light projecting unit that projects the mixed color light. Characteristic variable color temperature projector. 2. The light quantity adjusting means of the light quantity adjusting unit is configured to be capable of selectively adjusting the light quantity of only one of the yellow light component and the blue light component divided by the dichroic mirror. The variable color temperature projection device according to claim 1, wherein 3. The light source unit comprises a plurality of light sources having different relative spectral distributions of radiation intensity, and one of the light sources is selectable as a main light source. Variable color temperature projector. 4. The color temperature variable light projecting device according to claim 3, wherein the light source unit includes a turntable having the plurality of light sources. 5. The color temperature variable light projecting device according to claim 1, wherein the light source unit includes a light control unit capable of adjusting a light amount of a main light source in the light source unit. 6. The light amount adjusting means sets the ratio (transmittance) of the light amount emitted from the light amount adjusting unit to the light amount entering from the main light source of the light source unit to the light amount adjusting unit from 0 to 100.
3. The variable color temperature light projecting device according to claim 1, wherein the variable temperature light projecting device is configured to be continuously controllable between (%). 7. The color according to claim 1, wherein the light amount adjusting means is configured to change the transmittance of the color light separated by the dichroic mirror and also change the relative spectral transmittance. Variable temperature projector. 8. The color mixing means of the color mixing section comprises a plurality of optical fiber cables for collecting and mixing the two lights of blue light and yellow light after passing through the light quantity adjusting unit. Item 2. A variable color temperature projector according to item 1. 9. The dichroic mirror is attached so that the incident angle of light from the main light source of the light source section can be varied, and is adjusted to the direction of light rays of transmitted light and reflected light obtained through the dichroic mirror. 2. The variable color temperature projecting device according to claim 1, wherein the position of the color mixing unit is changed according to the position of the light amount adjusting unit and the direction of the light beam emitted from the light amount adjusting unit.