JP2017174756A - Luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To illuminate with high efficiency.SOLUTION: A luminaire includes a plurality of light sources 18, a cutter device 5, a condensing lens 6 and an image forming lens 3. The plurality of light sources 18 are mounted on one substrate and they are arranged at a plurality of positions different from each other respectively. In the cutter device 5, an opening 8 is formed. The condensing lens 6 condenses a plurality of rays of light emitted from the plurality of light sources 18 respectively in a region 33 including the opening 8 in the cutter device 5. The image forming lens 3 forms an image on an image forming surface 12 with the light which has passed the opening 8 out of the light condensed by the condensing lens 6. This luminaire can increase the amount of the light illuminating the image forming surface 12 by increasing the amount of the light passing the opening 8 by using the condensing lens 6, and it can illuminate the image forming surface 12 with high efficiency.SELECTED DRAWING: Figure 3

Description

  Embodiments described herein relate generally to a lighting device.

  Spotlights that illuminate part of a studio, stage, or museum are known. Such a spotlight includes a light source, a light shielding member, and a convex lens. The light emitted from the light source passes through an opening formed in the light shielding member, and is condensed by the convex lens, thereby forming an image on an illuminated imaging surface (see Patent Document 1). . Such a spotlight is required to be illuminated with high efficiency.

JP 2014-175126 A

  The problem to be solved by the present invention is to provide an illumination device that illuminates with high efficiency.

  The illumination device according to the embodiment includes a plurality of light sources, a cutter, an optical element, and a lens. The plurality of light sources are mounted on one substrate and are respectively arranged at a plurality of different positions. The cutter has an opening. The optical element condenses a plurality of lights respectively emitted from the plurality of light sources in a region including the opening of the cutter. The lens forms an image on the imaging plane of the light collected by the optical element and having passed through the opening.

FIG. 1 is a diagram illustrating an illumination apparatus according to the first embodiment. FIG. 2 is a plan view showing the light source device. FIG. 3 is an optical path diagram showing an optical path in which light emitted from a plurality of light sources forms an image on an image plane. FIG. 4 is a side cross-sectional view illustrating the lighting apparatus according to the second embodiment. FIG. 5 is a side cross-sectional view illustrating the lighting apparatus according to the third embodiment. FIG. 6 is a side cross-sectional view illustrating the lighting apparatus according to the fourth embodiment.

  The lighting device 1 according to the embodiment described below includes a plurality of light sources 18, a cutter 5, optical elements 6, 41, 51, 61 and a lens 3. The plurality of light sources 18 are mounted on one substrate 17 and are respectively disposed at a plurality of different positions. The cutter 5 has an opening 8 formed therein. The optical elements 6, 41, 51, 61 collect a plurality of lights emitted from the plurality of light sources 18 in a region including the opening 8 in the cutter 5. The lens 3 forms an image on the imaging plane of light that has passed through the opening 8 among the light collected by the optical elements 6, 41, 51, 61.

  Moreover, the optical element of the illuminating device according to the embodiment described below is formed of condensing lenses 6 and 41 that collect light by refracting the plurality of lights.

  Moreover, the condensing lens of the illuminating device which concerns on embodiment described below is formed from the some condensing lens 41 which each refracts the some light.

  Moreover, the optical element of the illuminating device which concerns on embodiment described below is formed from the reflectors 51 and 61 which condense by reflecting the some light.

  Moreover, the reflector of the illuminating device which concerns on embodiment described below is formed from the some reflector 61 which reflects the some light, respectively.

  Hereinafter, an illumination device according to an embodiment will be described with reference to the drawings. In the embodiment, the same parts are denoted by the same reference numerals, and redundant description is omitted.

[Lighting Device of Example 1]
FIG. 1 is a diagram illustrating an illumination device 1 according to the first embodiment. As shown in FIG. 1, the illumination device 1 includes a light source device 2, an imaging lens 3, a cutter device 5, and a condenser lens 6, and includes a base (not shown). The light source device 2 is fixed to the base. The light source device 2 emits light by a user operation. The imaging lens 3 is formed from a convex lens. The imaging lens 3 is disposed in front of the light source device 2 so as to be illuminated by light emitted from the light source device 2, and is disposed so that the optical axis 7 of the convex lens intersects the light source device 2. The imaging lens 3 is further supported by a base so as to be parallel to the optical axis 7 and movable in parallel. The imaging lens 3 is further fixed to the base so as to be disposed at a position away from the light source device 2 by a predetermined position.

  The cutter device 5 is made of a material that does not transmit visible light, is formed in a plate shape, and has an opening 8 formed therein. The cutter device 5 is disposed between the light source device 2 and the imaging lens 3 so as to be along a plane perpendicular to the optical axis 7, and is supported by the base so as to be parallel to the optical axis 7. The cutter device 5 is fixed to the base so as to be disposed at a position away from the imaging lens 3 by a predetermined position. The cutter device 5 further includes a plurality of cutter blades not shown. Each of the plurality of cutter blades is made of a material that does not transmit visible light, and is formed in a plate shape. The plurality of cutter blades are arranged around the opening 8 along the cutter device 5 and are supported by the cutter device 5 so as to be able to move along the cutter device 5. In the cutter device 5, the shape of the opening 8 is changed by moving a plurality of cutter blades.

  The condenser lens 6 is formed of a convex lens. The condenser lens 6 is disposed between the light source device 2 and the cutter device 5 so as to intersect the optical axis 7 of the imaging lens 3. The condenser lens 6 is further supported by the base so as to be movable parallel to the optical axis 7. The condenser lens 6 is further fixed to the base so as to be arranged at a position away from the light source device 2 by a predetermined position.

  FIG. 1 further shows a screen 11 illuminated by the illumination device 1. The screen 11 has a flat imaging surface 12 formed thereon. When the screen 11 is disposed at a position away from the lighting device 1 by a predetermined distance so that the imaging surface 12 is perpendicular to the optical axis 7, the screen 11 is imaged when illuminated by the lighting device 1. The projection light 14 is imaged on the surface 12. The shape of the projection light 14 corresponds to the shape of the opening 8.

[Multiple light sources]
FIG. 2 is a plan view showing the light source device 2. The light source device 2 includes an LED module 16 as shown in FIG. The LED module 16 is disposed on the surface of the light source device 2 that faces the imaging lens 3. The LED module 16 is a chip-on-board (COB) type module, and includes a substrate 17 and a plurality of light sources 18. The substrate 17 is formed in a flat plate shape. Each of the plurality of light sources 18 is formed of a light emitting diode (LED: Light Emitting Diode). The plurality of light sources 18 are arranged at a plurality of different positions on one surface of the substrate 17 and mounted on the substrate 17. Each of the light sources 18 emits light when power is supplied from the substrate 17.

  The plurality of light sources 18 are formed of a plurality of white light sources, a plurality of red light sources, a plurality of green light sources, and a plurality of blue light sources. The plurality of white light sources emit white light when controlled by the light source device 2. The plurality of red light sources emit red light when controlled by the light source device 2. The plurality of green light sources emit green light when controlled by the light source device 2. The plurality of blue light sources emit blue light as controlled by the light source device 2. Red light is light having a longer wavelength than blue light. Green light is light having a longer wavelength than blue light. White light includes red light, green light, and blue light.

  The light source device 2 is configured such that the intensity of white light emitted from a plurality of white light sources, the intensity of red light emitted from a plurality of red light sources, and the intensity of green light emitted from a plurality of green light sources by a user operation. The intensity of blue light emitted from each blue light source is adjusted independently of each other. The illumination device 1 can adjust the color of the projection light 14 to various colors by adjusting the intensity of light emitted from the plurality of light sources 18 in this way.

[Optical path where light from multiple light sources forms an image on the image plane]
FIG. 3 is an optical path diagram showing an optical path in which light emitted from a plurality of light sources 18 forms an image on the imaging plane 12. Light 31 emitted from the plurality of light sources 18 enters the condenser lens 6 as shown in FIG. The light incident on the condenser lens 6 is refracted and collected. A part of the light 32 collected by the condenser lens 6 passes through the opening 8 of the cutter device 5, and the remaining light is shielded by the cutter device 5. A part of the light that has passed through the opening 8 is incident on the imaging lens 3. The light incident on the imaging lens 3 is refracted by the refracting surface formed by the imaging lens 3. The light refracted by the imaging lens 3 illuminates the imaging surface 12 and forms an image on the imaging surface 12. The shape of the projection light 14 imaged on the imaging surface 12 is similar to the shape of the opening 8 of the cutter device 5.

  The condenser lens 6 is formed so that the light 32 collected by the condenser lens 6 illuminates the region 33. The region 33 is designed to include a region where the opening 8 of the cutter device 5 can be formed. That is, the condensing lens 6 is formed so that the light 31 emitted from the plurality of light sources 18 is illuminated over the entire area of the opening 8 even when the cutter device 5 maximizes the opening 8.

  Light 34 emitted from the plurality of light sources 18 when the condenser lens 6 is not provided illuminates a region 35 of the cutter device 5. The region 35 includes the region 33, and the area of the region 35 is larger than the area of the region 33.

  For this reason, the amount of light passing through the opening 8 of the light 32 collected by the condenser lens 6 is larger than the amount of light passing through the opening 8 of the light 34. That is, the illuminating device 1 is provided with the condensing lens 6 so that the amount of light passing through the opening 8 of the cutter device 5 is larger than when the condensing lens 6 is not provided. be able to. The illuminating device 1 can increase the amount of light incident on the imaging lens 3 by increasing the amount of light passing through the opening 8 of the cutter device 5. The amount of light can be increased. As a result, the illuminating device 1 can increase the amount of light that illuminates the imaging surface 12 per unit power consumption, and can illuminate the imaging surface 12 with high efficiency.

  By the way, although the imaging lens 3 of the illuminating device 1 of Example 1 is formed from one convex lens, it may be formed from a plurality of convex lenses. The illuminating device 1 according to the first embodiment increases the imaging plane 12 by providing the condenser lens 6 even when the imaging lens 3 is replaced with another imaging lens formed of a plurality of convex lenses. It can be illuminated efficiently.

  Furthermore, although the shape of the opening 8 is variable in the cutter device 5 of the illumination device 1 of the first embodiment, the shape of the opening 8 may be fixed. The illuminating device 1 according to the first embodiment increases the imaging surface 12 by providing the condenser lens 6 even when the cutter device 5 is replaced with another cutter device in which the shape of the opening 8 is fixed. It can be illuminated efficiently.

  Furthermore, although the light source device 2 of the illumination device 1 according to the first embodiment includes the COB type LED module 16, the light source device 2 may include an LED module having a different structure from the COB type. Examples of the LED module include a surface mount device (SMD) type LED module in which a plurality of LED chips arranged in a cavity formed of ceramic, resin, or the like are mounted on one substrate. Even when such an LED module is applied, the illumination device 1 can illuminate the imaging surface 12 with high efficiency by providing the condenser lens 6.

  Furthermore, the light source device 2 of the illumination device 1 according to the first embodiment includes four types of light sources having different colors of emitted light. However, any number of types may be used, for example, only one type of light source may be provided. . Even when the light source device 2 is replaced with such a light source device, the illumination device 1 can illuminate the imaging surface 12 with high efficiency by providing the condenser lens 6.

[Lighting Device of Example 2]
FIG. 4 is a side cross-sectional view illustrating the lighting apparatus according to the second embodiment. As shown in FIG. 4, the illuminating device of the second embodiment has the condensing lens 6 of the illuminating device 1 of the first embodiment described above replaced with a plurality of condensing lenses 41. The plurality of condenser lenses 41 correspond to the plurality of light sources 18 and are each formed of a convex lens. One condenser lens 43 corresponding to an arbitrary light source 42 among the plurality of condenser lenses 41 is disposed in front of the light source 42 so as to be illuminated by light emitted from the light source 42, and is fixed to the light source device 2. ing. Light 44 emitted from the light source 42 enters the condenser lens 43. The light incident on the condenser lens 43 is refracted and collected. The light 45 collected by the condenser lens 43 is irradiated on the region 33 of the cutter device 5 without being irradiated on the region 35 except the region 33 (see FIG. 3). That is, the condensing lens 43 is formed so that the light 44 strikes the region 33 and the light 44 does not impinge on the region 35 other than the region 33.

  For this reason, the light quantity of the light which passes through the opening part 8 among the light condensed by the plurality of condenser lenses 41 is emitted from the plurality of light sources 18 when the plurality of condenser lenses 41 are not provided. It is larger than the amount of light passing through the opening 8 in the light 46. That is, the illumination device according to the second embodiment is similar to the illumination device 1 according to the first embodiment described above, and the light passing through the opening 8 of the cutter device 5 is provided with the plurality of condenser lenses 41. The amount of light can be increased. The illumination device according to the second embodiment can increase the amount of light incident on the imaging lens 3 by increasing the amount of light passing through the opening 8 of the cutter device 5, and illuminate the imaging surface 12. The amount of light to be increased can be increased. As a result, the illumination device of Embodiment 2 can increase the amount of light that illuminates the imaging surface 12 per unit power consumption, and can illuminate the imaging surface 12 with high efficiency.

[Lighting Device of Example 3]
FIG. 5 is a side cross-sectional view illustrating the lighting apparatus according to the third embodiment. As shown in FIG. 5, the illuminating device according to the third embodiment has the condenser lens 6 of the illuminating device 1 according to the first embodiment described above replaced with the reflector 51. The reflector 51 is formed in a generally mortar shape, and a reflection surface 52 that reflects visible light is formed on the inner surface. The reflector 51 is disposed in front of the light source device 2 so that the plurality of light sources 18 are disposed at the bottom of the mortar, and is fixed to the light source device 2. A part of the light 53 emitted from the plurality of light sources 18 is directly applied to the region 33 of the cutter device 5, and the other part is incident on the reflecting surface 52 of the reflector 51. The light incident on the reflecting surface 52 of the reflector 51 is reflected and part of the light is applied to the region 33 of the cutter device 5. That is, the reflector 51 is configured so that a part of the light 53 emitted from the plurality of light sources 18 is directly irradiated onto the region 33 and the reflecting surface 52 of the light 53 emitted from the plurality of light sources 18 is provided. It is formed so that the reflected light 54 is applied to the region 33.

  For this reason, the amount of light irradiated to the region 33 is compared with the amount of light irradiated to the region 33 among the light 55 emitted from the plurality of light sources 18 when the reflector 51 is not provided. It is larger by the amount of the light 54 that is reflected by the reflecting surface 52 of the reflector 51 and applied to the region 33. The amount of light passing through the opening 8 increases as the amount of light applied to the region 33 increases. That is, the illumination device of the third embodiment can increase the amount of light passing through the opening 8 of the cutter device 5 by providing the reflector 51. The illumination device of the third embodiment can increase the amount of light incident on the imaging lens 3 by increasing the amount of light that passes through the opening 8 of the cutter device 5, and illuminates the imaging surface 12. The amount of light to be increased can be increased. As a result, the illumination device of Embodiment 3 can increase the amount of light that illuminates the imaging surface 12 per unit power consumption, and can illuminate the imaging surface 12 with high efficiency.

[Lighting Device of Example 4]
FIG. 6 is a side cross-sectional view illustrating the lighting apparatus according to the fourth embodiment. As shown in FIG. 6, the illuminating device according to the fourth embodiment has the condenser lens 6 of the illuminating device 1 according to the first embodiment described above replaced with a plurality of reflectors 61. The plurality of reflectors 61 correspond to the plurality of light sources 18. One reflector 63 corresponding to an arbitrary light source 62 among the plurality of reflectors 61 is formed in a generally mortar shape, and a reflection surface 64 that reflects visible light is formed on the inner surface. The reflector 63 is disposed in front of the light source device 2 so that the light source 62 is disposed at the bottom of the mortar, and is fixed to the light source device 2. A part of the light 65 emitted from the light source 62 is directly applied to the region 33 of the cutter device 5, and the other part is incident on the reflecting surface 64 of the reflector 63. The light incident on the reflecting surface 64 of the reflector 63 is reflected and a part of the light is applied to the region 33 of the cutter device 5. That is, the reflector 51 reflects the reflection surface 64 of the light 65 emitted from the plurality of light sources 18 so that a part of the light 65 emitted from the light source 62 is directly irradiated onto the region 33. It is formed so that the light 66 is irradiated to the region 33.

  For this reason, the light quantity irradiated to the area | region 33 is compared with the light quantity irradiated to the area | region 33 among the light 67 emitted from the several light source 18 when the several reflector 61 is not provided. Thus, the amount of light 66 is larger by the amount of light 66 that is reflected by the respective reflecting surfaces 64 of the plurality of reflectors 61 and applied to the region 33. The amount of light passing through the opening 8 increases as the amount of light applied to the region 33 increases. That is, the illumination device according to the fourth embodiment can increase the amount of light passing through the opening 8 of the cutter device 5 by providing the plurality of reflectors 61. The illumination device of the fourth embodiment can increase the amount of light incident on the imaging lens 3 by increasing the amount of light passing through the opening 8 of the cutter device 5, thereby illuminating the imaging surface 12. The amount of light to be increased can be increased. As a result, the illumination device of Embodiment 4 can increase the amount of light that illuminates the imaging surface 12 per unit power consumption, and can illuminate the imaging surface 12 with high efficiency.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1: Illuminating device 2: Light source device 3: Imaging lens 5: Cutter device 6: Condensing lens 8: Aperture 18: Multiple light sources 41: Multiple condensing lenses 51: Reflector 61: Multiple reflectors

Claims (5)

A plurality of light sources mounted on a single substrate and respectively disposed at a plurality of different positions;
A cutter in which an opening is formed;
An optical element for condensing a plurality of lights respectively emitted from the plurality of light sources in a region including the opening of the cutter;
A lens that forms an image on the imaging surface of the light collected by the optical element that has passed through the opening;
A lighting device comprising: The illuminating device according to claim 1, wherein the optical element is formed of a condensing lens that condenses the plurality of lights by refracting them. The illuminating device according to claim 2, wherein the condenser lens includes a plurality of condenser lenses that refract the plurality of lights. The illumination device according to claim 1, wherein the optical element is formed of a reflector that collects light by reflecting the plurality of lights. The lighting device according to claim 4, wherein the reflector includes a plurality of reflectors that respectively reflect the plurality of lights.

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