JP5911007B2

JP5911007B2 - Lighting device

Info

Publication number: JP5911007B2
Application number: JP2011080926A
Authority: JP
Inventors: 守井坂; 英治浜島; 光浩鶴田; 文夫渡邉; 永世小林
Original assignee: 株式会社湘南工作所
Priority date: 2011-03-31
Filing date: 2011-03-31
Publication date: 2016-04-27
Anticipated expiration: 2031-03-31
Also published as: JP2012216417A

Description

本発明は、照明機器に係わり、特に光を特定の場所や方向に集中して照射する照明装置に関する。 The present invention relates to a lighting device, and more particularly to a lighting device that irradiates light in a concentrated manner in a specific place or direction.

従来の照明装置は、図２に示すように、一般的に光源１は一個で、ここから発する光を反射鏡２で集光し、一方向に照射する構造がほとんどであった。ここからさらに高い光度を得ようとするには、より電力の大きな光源にするか、光源の数を増やすことが考えられるが、省電力という面で低電力の光源を複数個使用する方法が知られている。特に光源として急速に普及しているＬＥＤでは、複数個使用することで所要の明るさを得ている場合がほとんどである。 As shown in FIG. 2, the conventional illuminating device generally has a single light source 1 and has a structure in which light emitted from the light source 1 is collected by the reflecting mirror 2 and irradiated in one direction. In order to obtain higher luminous intensity from here, it is conceivable to use light sources with higher power or increase the number of light sources, but there is a known method of using a plurality of low power light sources in terms of power saving. It has been. In particular, in LEDs that are rapidly spreading as light sources, the required brightness is obtained by using a plurality of LEDs.

例えば特開２００５−３２７６９３号にあるように、照射方向に並列に複数個の光源（ＬＥＤ）を配置し、全体の形状が円形あるいは矩形にすることで、擬似的に円形あるいは矩形の投射配光パターンにしている。その例として図３に示す光源（ＬＥＤ）を円形に配置した照明装置を示す。 For example, as disclosed in Japanese Patent Application Laid-Open No. 2005-327893, a plurality of light sources (LEDs) are arranged in parallel in the irradiation direction, and the overall shape is circular or rectangular so that a pseudo circular or rectangular projection light distribution is obtained. It has a pattern. As an example, an illumination device in which the light sources (LEDs) shown in FIG. 3 are arranged in a circle is shown.

特開２００５−３２７６９３号投光器JP-A-2005-327893 Sender

従来複数個の光源を使用して照明装置とする場合、光源を並べて並列に照射する光となるため、この取付間隔分だけ照射光がずれることになり、重ねてひとつの照射光とすることが難しいという欠点があった。また光源をＬＥＤとする場合、発光素子が角形なので投射配光パターンも角形となり、円形にすることが難しいという欠点もあった。 Conventionally, when using a plurality of light sources as an illumination device, the light sources are arranged to be irradiated in parallel, so the irradiation light is shifted by this mounting interval, and can be overlapped to form one irradiation light. There was a drawback that it was difficult. Further, when the light source is an LED, since the light emitting element is square, the projection light distribution pattern is also square, and there is a drawback that it is difficult to make a circle.

本発明の目的は、光源を複数個使用する灯器において、光度分布が中央が高く周囲ほど低くなる円形の投射配光パターンを有する照明装置を提供することにある。 An object of the present invention is to provide an illuminating device having a circular projection light distribution pattern in a lamp using a plurality of light sources, the luminous intensity distribution of which is higher at the center and lower toward the periphery.

複数個の光源の向きを灯器中央に集中し、それを灯器前方に照射できる機能を有する構造とすることで達成する。それには、まず各光源の光を一方向に集められる機能を有する集光装置とするとともに、複数個の光源の照射方向を灯器中央にしてから前方に照射できる機能と、光源の形状にかかわらず投射配光パターンを円形にできる機能と、所要の広がり角度を持った照射光にできる機能とを有する中央照射装置とすることで達成する。

This is achieved by concentrating the directions of a plurality of light sources in the center of the lamp and having a function capable of irradiating it in front of the lamp. For this purpose, first, a light collecting device having a function of collecting light from each light source in one direction, a function that can irradiate a plurality of light sources in the center and then irradiate forward, and a shape of the light source. This is achieved by providing a central irradiation device having a function capable of making the projected light distribution pattern circular and a function capable of generating irradiation light having a required spread angle.

本発明は、低電力の光源を複数個使用して、その照射光を集中できる利点を持つ。また、光源の数を少なくとも２個以上から設置可能な最大数で、所要の光度をもとに決定できる利点も持つ。
The present invention has an advantage that the irradiation light can be concentrated by using a plurality of low-power light sources. In addition, there is also an advantage that the number of light sources can be determined based on the required luminous intensity with the maximum number that can be installed from at least two.

本発明の照明装置の概略断面図Schematic sectional view of the illumination device of the present invention 従来例の単光源の照明装置の断面図Sectional view of a conventional single light source illumination device 従来例の光源（ＬＥＤ）を複数個使用した照明装置の外観図External view of a lighting device using a plurality of conventional light sources (LEDs)

本発明の照明装置は、複数個の光源と集光装置を一式として、中央照射装置を中心とし、その周囲に配置する構成にすることが望ましい。
集光装置は、光源の光を可能な限り集光して一方向に照射できるように、反射鏡とレンズを組み合わせた構造とすることが望ましい。 The illuminating device of the present invention desirably has a configuration in which a plurality of light sources and a condensing device are set as a set, with the central irradiation device as the center, and arranged around the central irradiation device.
The condensing device desirably has a structure in which a reflecting mirror and a lens are combined so that light from the light source can be collected as much as possible and irradiated in one direction.

中央照射装置は、灯器中央に配置し、周囲の複数個ある光源と集光装置からの照射光を集め前方に方向を変えるための反射部品を最適な形状にして用いることが望ましく、それを投射配光パターンを円形にするために、円柱状ロッドレンズで成るインテグレータとすることが望ましい。このとき可能な限り全照射光を集中させるためのレンズ系をインテグレータ直前に設けることが望ましい。そして、所要の広がりを持った照射光とするために、適切な曲率を有する複数枚の反射鏡の組み合わせにすることが望ましい。 It is desirable that the central illuminating device is arranged in the center of the lamp, and it is desirable to use a reflective component for collecting the irradiation light from a plurality of surrounding light sources and the condensing device and changing the direction in an optimum shape. In order to make the projected light distribution pattern circular, it is desirable to use an integrator composed of a cylindrical rod lens. At this time, it is desirable to provide a lens system for concentrating all irradiated light as much as possible immediately before the integrator. In order to obtain irradiation light having a required spread, it is desirable to combine a plurality of reflecting mirrors having an appropriate curvature.

以下に本発明の一実施例を図１に基づいて説明する。
灯器３の後部内面に均等間隔で取付けられた複数個の光源（ＬＥＤ）１ａと、その直後に光源（ＬＥＤ）１ａと対を成す集光装置６とが灯器３の中心に向かって放射状に配置してある。その中心には多角錐反射部品８があり、集光装置６からの照射光を中央照射装置７中央に反射させている。そして、多角錐反射部品８の直後に凹レンズ９と凸レンズ１０とで組に合わされたレンズ群が、更に灯器中心軸に対して集光させるために配置してある。 An embodiment of the present invention will be described below with reference to FIG.
A plurality of light sources (LEDs) 1 a mounted at equal intervals on the rear inner surface of the lamp 3 and a light collecting device 6 paired with the light source (LED) 1 a immediately after that are radially directed toward the center of the lamp 3. It is arranged in. At its center, there is a polygonal pyramid reflecting component 8 that reflects the irradiation light from the light collecting device 6 to the center of the central irradiation device 7. Then, immediately after the polygonal pyramid reflection component 8, a lens group formed by a combination of the concave lens 9 and the convex lens 10 is arranged for further focusing on the central axis of the lamp.

集光装置６には、放物面反射部品６ａが内面に放物面鏡を形成するとともに出射側は集光レンズとして作用する球面が形成されて、その中心部には凸レンズ６ｂと凸レンズ６cとで組み合わされたレンズ群を形成している構造である。これにより、光源（ＬＥＤ）１ａからの光は、中央部が凸レンズ６ｂと凸レンズ６cとで集光されるとともに、それ以外の凸レンズ６ｂの外側の光は、放物面反射部品６ａで反射してから集光レンズの機能を有する球面部から出射し集光される。 In the condensing device 6, the paraboloid reflecting component 6 a forms a parabolic mirror on the inner surface, and a spherical surface acting as a condensing lens is formed on the exit side. This is a structure that forms a lens group combined with each other. Thereby, the light from the light source (LED) 1a is collected by the convex lens 6b and the convex lens 6c at the center, and the light outside the other convex lens 6b is reflected by the parabolic reflecting component 6a. The light is emitted from the spherical portion having a function of a condensing lens and condensed.

次に中央照射装置７には、円形断面を持ち内面で全反射するインテグレータ７ａ通って、双曲面反射鏡７ｂと放物面反射鏡７ｃとで反射する構造である。これにより、集光装置６で集光された照射光は、インテグレータ７ａに入射させることで円形に整えられ、双曲面反射鏡７ｂと放物面反射鏡７ｃとで、所要の広がりを有する照射光として、前面ガラス４を通って出射されるのである。 Next, the central irradiation device 7 has a structure in which it is reflected by a hyperboloid reflecting mirror 7b and a parabolic reflecting mirror 7c through an integrator 7a having a circular cross section and totally reflecting on the inner surface. Thereby, the irradiation light condensed by the condensing device 6 is arranged in a circular shape by being incident on the integrator 7a, and the irradiation light having a required spread by the hyperboloid reflecting mirror 7b and the parabolic reflecting mirror 7c. The light is emitted through the front glass 4.

本発明によれば、複数個の低電力の光源を使用し、所要の光度を得られるとともに、単光源と同様の投射配光パターンにすることができるため、従来の高電力の単光源を使用した照明装置に替わり、省電力で高光度の照明装置としての利用が期待される。 According to the present invention, a plurality of low-power light sources can be used to obtain a required luminous intensity, and a projection light distribution pattern similar to that of a single light source can be obtained, so that a conventional high-power single light source is used. Instead of the illuminating device, it is expected to be used as a power-saving and high-luminance illuminating device.

１光源
１ａ光源（ＬＥＤ）
２反射鏡
３灯器
４前面ガラス
５レンズ
６集光装置
６ａ放物面反射部品
６ｂ凸レンズ
６ｃ凸レンズ
７中央照射装置
７ａインテグレータ
７ｂ双曲面反射鏡
７ｃ放物面反射鏡
８多角錐反射部品
９凹レンズ
１０凸レンズ

1 Light source 1a Light source (LED)
2 Reflector 3 Lamp 4 Front glass 5 Lens 6 Condenser 6a Parabolic reflector 6b Convex lens 6c Convex lens 7 Central irradiator 7a Integrator 7b Hyperboloid reflector 7c Paraboloid reflector 8 Polygonal cone reflector 9 Concave lens 10 convex lens

Claims

In the lamp that irradiates the light from the light source in the required direction,
A plurality of the light sources;
A light collecting device that collects light for each of the light sources;
A central irradiation device that irradiates all of the light emitted from each of the light collecting devices in one place and irradiates the lamp forward,
Providing the central irradiation device in the lamp;
A plurality of the light sources comprising LEDs;
A plurality of the light sources and the light collecting device are arranged radially from the central irradiation device;
Arranging the light source and the condensing device so that the irradiation light obtained from the condensing device is concentrated on the central irradiation device;
The central irradiation device is arranged with a cylindrical rod lens for making the incident irradiation light a circular shape with a high central luminous intensity,
The central illuminating device is provided with a lens for giving a required spread to the light emitted from the lamp.