JP2007305410A - Lighting equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To control deterioration caused by heat ray of a light source without utilizing a change element such as a color filter. <P>SOLUTION: The lighting equipment comprises: the light source 11; a diffraction grating 12 which reflects light emitted from the light source 11; a slit member 13 through which the light reflected by the diffraction grating 12 passes; and a mirror 14 guiding the light that has passed through the slit member 13 to a prescribed direction. Using this constitution, monochromatic light is obtained by passing through the slit member 13 of the light which has been wavelength-dispersed and reflected in prescribed angles with the diffraction grating 12. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a tonable lighting device used for realizing a desired color scene in lighting in a stage or a studio.

  Conventionally, in this type of lighting fixture, a plurality of color filters are prepared for color matching, and a desired color is selected and used. For this reason, when it is necessary to express a large number of colors, there is a problem that a large number of color filters are required.

In contrast to the above, for example, there is a lighting fixture called a color changer device disclosed in Patent Document 1. In this color changer device, color filters that realize a plurality of colors are arranged in a long color filter band.
No. 6-9362

  In the color changer device described in Patent Document 1, in order to express many colors, it is necessary to increase the number of color filters arranged in the color filter band, and the color filter band becomes long. is there.

  Moreover, in the conventional lighting fixtures including the lighting fixture described in Patent Document 1, there is a problem that the color filter deteriorates due to the heat rays from the light source and needs to be replaced.

  The problem to be solved by the invention is that many color filters are required to express many colors, and that the color filters are likely to be deteriorated due to heat rays of the light source, and that the color filters need to be replaced. . The present invention has been made to solve such problems, and its purpose is to reduce the degree of deterioration due to heat rays of the light source, and to perform multicolor and quick color exchange without using an exchange element such as a color filter. It is to provide a luminaire capable of.

  The luminaire according to the present invention includes a light source; a diffraction grating that is rotatably provided and reflects light emitted from the light source; a slit that allows light reflected by the diffraction grating to pass; and light that passes through the slit in a predetermined direction. And a light guide path led out to.

  As the light source, a small high-intensity lamp that emits white light, such as a metal halide lamp, can be used. The light guide path can be constituted by a reflecting mirror, and the reflecting mirror rotates in conjunction with the diffraction grating. The diffraction grating is preferably composed of a heat-resistant material such as fine ceramic or metal. It is desirable that the light emission direction from the light source matches the light emission direction from the light guide. A groove is provided on the surface of the diffraction grating, and it is desirable that the inclined surface of the groove and the mirror surface of the reflecting mirror be parallel to each other.

  A lighting fixture according to the present invention includes a first lighting fixture having the configuration described in claim 1, a second lighting fixture having the configuration described in claim 1, a first lighting fixture, and a second lighting fixture. And a selection means for selecting one of the light emitted from the lighting fixture.

  As the selection means, a mirror that reflects one of the light emitted from the first lighting fixture and the second lighting fixture by rotation can be employed. The color obtained by the diffraction grating used in the first lighting fixture is different from the color obtained by the diffraction grating used in the second lighting fixture, and the selection means instantly performs switching selection. Is possible.

  According to the present invention related to the above configuration, various monochromatic lights can be obtained by changing the angle of the diffraction grating and the slits, and by deriving them in a predetermined direction through the light guide, it is possible to irradiate the desired monochromatic light. Many color filters are unnecessary, and there is an effect that deterioration due to heat rays of the light source hardly occurs.

  According to the invention of claim 2, the color obtained by the diffraction grating used in the first lighting fixture is different from the color obtained by the diffraction grating used in the second lighting fixture. Thus, it is possible to irradiate with one of the monochromatic lights by instantaneously selecting and switching by the selection means, and there is an effect that the illumination color can be switched in a short time.

  Embodiments of a lighting apparatus according to the present invention will be described below with reference to the accompanying drawings. In the drawings, the same components are denoted by the same reference numerals and redundant description is omitted.

  FIG. 1 shows the configuration of a first embodiment of a lighting fixture according to the present invention. The lighting fixture includes a light source 11, a diffraction grating 12, a slit 13, and a reflecting mirror 14. As the light source 11, a small high-intensity lamp that emits white light, such as a metal halide lamp, is used. The light is converted into parallel light by the reflector 15 or the like and emitted toward the diffraction grating 12. The diffraction grating 12 has a plurality of grooves 21 on the surface, and the grooves 21 have a sawtooth cross section as shown in FIG. The diffraction grating 12 wavelength-disperses incoming parallel light and reflects it in an angular direction determined according to the wavelength. The diffraction grating 12 is preferably made of a heat-resistant material such as fine ceramic or metal.

  The slit 13 allows the light reflected by the diffraction grating 12 to pass through and becomes monochromatic light. The reflecting mirror 14 constitutes a light guide path that guides light having passed through the slit 13 in a predetermined direction. It is desirable that the light emission direction from the light source 11 and the light emission direction from the light guide path by the reflecting mirror 14 coincide with each other, and such a configuration is adopted here.

  In this embodiment, the diffraction grating 12 is rotated so as to change the optical axis of the reflected light, and the required monochromatic light is emitted through the slit 13 by the rotation of the diffraction grating 12. In conjunction with the rotation of the diffraction grating 12, the reflecting mirror 14 also rotates to change the optical axis of the reflected light. It is desirable that the slope 22 of the groove 21 formed on the surface of the diffraction grating 12 and the mirror surface of the reflecting mirror 14 be parallel as shown in FIG. 2, and this configuration is employed in this embodiment. That is, as shown in FIG. 2, the light incident angle θ1i and the reflection angle θ1o with respect to the inclined surface 22 of the groove 21 are equal, and the light incident angle θ2i and the reflection angle θ2o with respect to the reflecting mirror 14 are all equal, The monochromatic light can be efficiently obtained. That is, in FIG. 2, θ1i = θ1o = θ2i = θ2o.

  FIG. 3 shows a configuration of toning control related to the lighting apparatus shown in FIG. A desired color can be selected from a plurality of colors by the toning button 31. The toning button 31 is moved by, for example, sliding, and has a configuration in which a desired color is designated by associating the slide position with a color that gradually changes, and a toning signal corresponding to the stop position is output. In addition, the external input terminal 32 corresponds to a color-adjusted signal (as in the case described above, a color selected by a DMX signal (DMX 512: a standard digital signal in a production field standardized by the American Theater Technology Association (USITT)). Signal) can be received. The switch 33 selects a toning signal sent from the toning button 31 or the external input terminal 32, and the selected toning signal is sent to the control signal generator 34.

  The control signal generator 34 converts the toning signal into a pulse signal (driving signal) for the stepping motor 36 corresponding to the angle change amount of the diffraction grating 12 and outputs the pulse signal (driving signal). Is done. Therefore, the control signal generator 34 includes, for example, a memory table in which the toning signal corresponding to each color and the pulse signal (driving signal) are associated, and outputs a pulse signal (driving signal) corresponding to the incoming toning signal. Can be configured to.

  The pulse signal (drive signal) is sent to the stepping motor 36, and the angle adjusting mechanism 35 including the stepping motor 36 rotates the diffraction grating 12 and the reflecting mirror 14 in accordance with the rotation of the stepping motor 36.

  With the above configuration, the white parallel light emitted from the light source 11 is wavelength-dispersed by the diffraction grating 12 and reflected in an angular direction determined according to the wavelength, and is converted into monochromatic light by the slit 13 and emitted to the reflecting mirror 14. And led out in a predetermined direction by reflection by the reflecting mirror 14. Here, as described above, a toning signal arrives at the control signal generating unit 34 from the toning button 31 or the external input terminal 32, and the diffraction grating 12 has a required angle by the rotation of the stepping motor 36. Are emitted to the reflecting mirror 14. As a result, it is possible to irradiate desired monochromatic light by deriving in a predetermined direction through the light guide path constituted by the reflecting mirror 14.

  FIG. 4 shows the configuration of a lighting fixture according to the second embodiment. The lighting fixture according to the second embodiment includes the first lighting fixture 50-1 having the configuration described in the first embodiment and the second lighting having the configuration described in the first embodiment. Instrument 50-2. Moreover, the mirror 51 which functions as a selection means which selects one of the light radiate | emitted from the 1st lighting fixture 50-1 and the 2nd lighting fixture 50-2 is provided.

  The first lighting fixture 50-1 includes a light source 11-1, a diffraction grating 12-1, a slit 13-1, a reflecting mirror 14-1, and a reflecting plate 15-1. The second lighting fixture 50-2 includes a light source 11-2, a diffraction grating 12-2, a slit 13-2, a reflecting mirror 14-2, and a reflecting plate 15-2. The 1st lighting fixture 50-1 and the 2nd lighting fixture 50-2 are provided facing, and were emitted from the optical path of the light radiate | emitted from the reflective mirror 14-1, and the reflective mirror 14-2. It coincides with the optical path of light. A mirror 51 is provided at a predetermined position (for example, an intermediate position) on the optical path connecting the reflecting mirror 14-1 and the reflecting mirror 14-2, and the mirror 51 is rotated as indicated by an arrow and emitted from the reflecting mirror 14-1. The reflected light or the light emitted from the optical path and the reflecting mirror 14-2 is reflected in the light irradiation direction (downward in FIG. 4) of the lighting fixture.

  The mirror 51 is driven by, for example, a motor that rotates at high speed. The motor can be driven from, for example, an illumination control console constituted by a microcomputer. By control from this lighting control console or the like, it is possible to select monochromatic light emitted from either the first lighting fixture 50-1 or the second lighting fixture 50-2. In this lighting control console, for example, the lighting schedule information is stored in correspondence with the time or the time from the start, and based on the lighting schedule information, the first lighting fixture 50-1 and the second lighting fixture 50-2 are stored. It is possible to perform instantaneous color-tone switching in the illumination scene by controlling transmission of the color-adjustment signal and switching of the mirror 51.

  FIG. 5 shows an example of the lighting schedule information described in correspondence with the time from the start. At the start, the first lighting fixture 50-1 is selected, a “blue” toning signal is sent to the first lighting fixture 50-1, and “red” is sent to the second lighting fixture 50-2. Toning signal is transmitted. After 5 minutes, a control signal for switching the mirror 51 is sent, and the second lighting fixture 50-2 is selected. Therefore, after 5 minutes from the start, the illumination color is instantly switched from “blue” to “red”, and a “purple” toning signal is sent to the first lighting fixture 50-1 for the next switching time. The lighting color 13 minutes after the start ("purple") is prepared in the first lighting fixture 50-1. It is possible to change the illumination color instantaneously one after another by such automatic control from the illumination control console, and a smooth illumination state can be realized. In this example, the case where the control signal is automatically sent is shown. However, the toning signal is sent to both sides at the initial stage, and is directed to the non-selected side by switching at the time of switching control of the mirror 51. Alternatively, the control signal for switching the mirror 51 may be transmitted by the operator. Alternatively, all the control signals may be operated and sent by the operator.

The block diagram which shows the 1st Example of the lighting fixture which concerns on this invention. The principal part expansion block diagram in the 1st Example of the lighting fixture which concerns on this invention. The block diagram of the toning control in the 1st Example of the lighting fixture which concerns on this invention. The block diagram which shows the 2nd Example of the lighting fixture which concerns on this invention. The figure which shows an example of the illumination schedule information used when performing the illumination by the 2nd Example of the lighting fixture which concerns on this invention.

Explanation of symbols

11, 11-1, 11-2 Light source
12, 12-1, 12-2 diffraction grating
13, 13-1, 13-2 Slit
14, 14-1, 14-2 Reflector
15, 15-1, 15-2 Reflector
31 Toning button
32 External input terminal
33 switch
34 Control signal generator
35 Angle adjustment mechanism
36 Stepping motor
50-1 1st lighting fixture
50-2 Second lighting fixture
51 mirror

Claims (2)

With a light source;
A diffraction grating provided rotatably and reflecting light emitted from the light source;
A slit for passing light reflected by the diffraction grating;
A light guide that guides light through the slit in a predetermined direction;
The lighting fixture characterized by comprising. A first lighting fixture having the configuration according to claim 1;
A second luminaire having the configuration according to claim 1;
Selecting means for selecting one of the light emitted from the first lighting fixture and the second lighting fixture;
The lighting fixture characterized by comprising.

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