JP2003281910A - Luminaire - Google Patents
LuminaireInfo
- Publication number
- JP2003281910A JP2003281910A JP2002084948A JP2002084948A JP2003281910A JP 2003281910 A JP2003281910 A JP 2003281910A JP 2002084948 A JP2002084948 A JP 2002084948A JP 2002084948 A JP2002084948 A JP 2002084948A JP 2003281910 A JP2003281910 A JP 2003281910A
- Authority
- JP
- Japan
- Prior art keywords
- light
- reflecting mirror
- reflecting
- illumination
- lamp
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、建築物の壁面や天
井面等の照明面を、照明面の近傍に設けた光源により均
斉度よく照明する照明器具に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a luminaire for illuminating an illumination surface such as a wall surface or a ceiling surface of a building with a uniform degree by a light source provided near the illumination surface.
【０００２】[0002]
【従来の技術】従来、建築照明における照明計画のなか
で、光源からの直接光の眼への入射を避けて、壁面や天
井面を均斉度よく照射し、明るさ感を得るなどの手法と
してウォールウォッシャーや、天井掘込みに納めた照明
器具によって壁面への間接照明を行うコーニス照明、あ
るいは、折り上げ天井の間接照明などの手法が知られて
いる。近年特に、照射面における照明の均斉度は、より
厳しいものが市場から求められており、照射面と直角の
面に照射面に接近して設けた透光開口から照射面を照射
する前記コーニス照明などの手法においても、より均斉
度を高くできる照明器具が要求されている。2. Description of the Related Art Conventionally, in a lighting plan for architectural lighting, as a method for avoiding direct light from a light source entering the eye and irradiating a wall surface or a ceiling surface in a uniform manner to obtain a sense of brightness. There are known methods such as wall washer, cornice lighting for indirectly illuminating a wall surface with a lighting device housed in a ceiling, or indirect lighting for a folded ceiling. In recent years, particularly, the market demands that the uniformity of illumination on the irradiation surface be more severe, and the cornice illumination that irradiates the irradiation surface from a translucent opening provided close to the irradiation surface on a surface perpendicular to the irradiation surface. Even in such methods, there is a demand for a lighting device that can increase the uniformity.
【０００３】従来の、壁面照明器具の一例を図８に示
す。図８の照明器具１０は、照射面２である壁面の幅方
向及び上下方向の広い面積に亘っていわゆるウォールウ
ォッシャー照明を行うものであり、天井面３に設置され
たコーニス照明型の照明器具である。直管形のランプ
（光源）４を有する照明器具１０が、天井面３の照射面
２との交叉部分に設けられた長尺の天井堀込み３１に納
められている。この構成の照明器具においては、ランプ
４からの直接光が主として照明に使われている。照明器
具１０と照射面２との距離Ｌを十分大きくすることがで
きれば、高い照明均斉度は得られるが、通常、そのよう
な距離を設けることは許されない。そのため、図に示す
ように照射面２の近傍に照明器具を設けることになり、
照明器具に近い部分の照射面Ｐが相対的に強く明るくな
り、照明器具から遠い壁面部分Ｑにまでは強い光が届か
ず、均斉度は著しく悪くなる。照射面を均斉度よく照射
する改善策として、集光及び方向制御のための放物線反
射鏡などを備えた照明器具が知られており、その例を図
９、図１０に示す。これらの従来例は、上記の例よりも
光源の有効利用、照明の明るい範囲の拡大、あるいは照
明の均斉度について改善されたものになっている。FIG. 8 shows an example of a conventional wall lighting fixture. The luminaire 10 of FIG. 8 performs so-called wall washer illumination over a wide area in the width direction and the vertical direction of the wall surface that is the irradiation surface 2, and is a cornice illumination type luminaire installed on the ceiling surface 3. is there. A luminaire 10 having a straight tube lamp (light source) 4 is housed in a long ceiling digging 31 provided at a portion where a ceiling surface 3 intersects with an irradiation surface 2. In the luminaire having this configuration, direct light from the lamp 4 is mainly used for illumination. If the distance L between the luminaire 10 and the irradiation surface 2 can be made sufficiently large, a high degree of illumination uniformity can be obtained, but normally such a distance is not allowed. Therefore, as shown in the figure, a lighting fixture is provided near the irradiation surface 2,
The irradiation surface P near the luminaire becomes relatively strong and bright, and strong light does not reach the wall surface portion Q far from the luminaire, and the uniformity becomes significantly poor. As an improvement measure for uniformly irradiating the irradiation surface, a lighting fixture including a parabolic reflector for condensing and controlling the direction is known, and examples thereof are shown in FIGS. 9 and 10. These conventional examples are improved in the effective use of the light source, the expansion of the bright range of the illumination, or the uniformity of the illumination, as compared with the above examples.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、反射鏡
６１を備えた上述したような図９の照明器具において
は、照射面上に直接光による照明面Ｄと反射鏡６１から
の反射光による照明面Ｒの境界部分Ａが明瞭に現れて光
むらが発生し、照明の均斉度が損なわれる問題がある。
また、反射鏡６２を備えた図１０の照明器具において
は、照射面側の反射鏡下端部より発する反射光Ｌ１が対
向する反射鏡６２に入射し、その光がさらに反射して二
次反射光Ｌ２となり照射面Ｂを照らすため、この二次反
射光Ｌ２の影響により照射面Ｂに光むらや光スジが形成
され、照明の均斉度が損なわれる問題がある。このよう
に、照射面に近接して光源が設けられた場合、照射面の
照明の均斉度が悪い、あるいは、照射面に光むらや光の
スジが局所的に生じて照明の品質が低下するという問題
がある。However, in the luminaire of FIG. 9 having the reflecting mirror 61 as described above, the illuminating surface D by the direct light on the illuminating surface and the illuminating surface by the reflected light from the reflecting mirror 61 are provided. There is a problem that the boundary portion A of R clearly appears and uneven light is generated, and the uniformity of illumination is impaired.
Further, in the lighting fixture of FIG. 10 including the reflecting mirror 62, the reflected light L1 emitted from the lower end of the reflecting mirror on the irradiation surface side is incident on the facing reflecting mirror 62, and the light is further reflected to be the secondary reflected light. Since it becomes L2 and illuminates the irradiation surface B, there is a problem that uneven light and light streaks are formed on the irradiation surface B due to the influence of the secondary reflected light L2, and the uniformity of illumination is impaired. As described above, when the light source is provided in the vicinity of the irradiation surface, the uniformity of the illumination on the irradiation surface is poor, or the unevenness of light or light streaks locally occurs on the irradiation surface to deteriorate the quality of the illumination. There is a problem.
【０００５】本発明は、上記の課題を解消するものであ
って、照射面に近接して光源が設けられた場合、簡単な
構成により光源の有効利用あるいは照明範囲の拡大を行
い、照射面の照明の均斉度向上を実現できる照明器具を
提供することを目的とする。The present invention solves the above problems, and when a light source is provided in the vicinity of the irradiation surface, the light source is effectively used or the illumination range is expanded with a simple structure to reduce the irradiation surface area. It is an object of the present invention to provide a lighting fixture that can improve the uniformity of lighting.
【０００６】[0006]
【課題を解決するための手段】上記の課題を達成するた
めに、請求項１の発明は、壁面に接近して設けられ、下
面側に設けた透光開口から壁面を照射する照明器具であ
って、放物線又は楕円を含む略放物線状曲線の断面形状
を有する反射鏡を備え、反射鏡の焦点に光源を有し、反
射鏡の光軸の傾きαが、壁面方向に０゜＜α＜１０゜と
なるようにしたものである。In order to achieve the above-mentioned object, the invention of claim 1 is a lighting device which is provided close to a wall surface and irradiates the wall surface from a translucent opening provided on the lower surface side. A reflecting mirror having a cross-section of a substantially parabolic curve including a parabola or an ellipse, a light source is provided at the focal point of the reflecting mirror, and the inclination α of the optical axis of the reflecting mirror is 0 ° <α <10 in the wall surface direction. It was designed so that
【０００７】上記構成の照明器具においては、光源を焦
点とする反射鏡を設けたことにより、光源からの光を有
効利用すると共に、光源からの光に指向性を持たせるこ
とができる。さらに、反射鏡の方向を反射鏡の光軸の傾
きαが、壁面方向に０゜＜α＜１０゜となる方向に設定
しているので、照射面の広範囲に亘って均斉度良く照明
を行うことができる。In the luminaire having the above-mentioned structure, by providing the reflecting mirror having the light source as the focal point, the light from the light source can be effectively used and the light from the light source can have directivity. Further, since the direction of the reflecting mirror is set so that the inclination α of the optical axis of the reflecting mirror is 0 ° <α <10 ° in the wall surface direction, illumination is performed with good uniformity over a wide range of the irradiation surface. be able to.
【０００８】請求項２の発明は、請求項１の発明におい
て、反射鏡は、光源を焦点とした放物線又は略放物線状
曲線と、その放物線又は略放物線状曲線より曲率が小さ
い曲線又は直線とから形成され、壁面とは反対側の反射
鏡部分に、前記放物線又は略放物線状曲線より曲率が小
さい曲線又は直線となる部分を有するものである。According to a second aspect of the present invention, in the first aspect of the invention, the reflecting mirror is composed of a parabola or a substantially parabolic curve having a light source as a focal point and a curve or a straight line having a curvature smaller than that of the parabola or the substantially parabolic curve. The reflecting mirror portion formed on the side opposite to the wall surface has a portion having a curved line or a straight line having a curvature smaller than that of the parabolic or substantially parabolic curve.
【０００９】この構成の照明器具においては、上記発明
の効果に加えて、反射鏡の一部に曲率の小さい断面の部
分を設けたことにより、この部分において反射する光は
曲率が大きなままの場合よりも光の広がりが大きくなる
ため、照射面上における直接光と反射光の境界部分にこ
の構成を適用して照明の均斉度を向上することが可能と
なる。In addition to the effects of the invention described above, the luminaire having this structure is provided with a part of the reflecting mirror having a cross section with a small curvature, so that the light reflected at this part has a large curvature. Since the spread of light becomes larger than that, it becomes possible to improve the uniformity of illumination by applying this configuration to the boundary portion between the direct light and the reflected light on the irradiation surface.
【００１０】請求項３の発明は、請求項１の発明におい
て、壁面側の反射鏡下端部からの反射光が、壁面とは反
対側の反射鏡部分に入射しないようにしたものである。According to a third aspect of the invention, in the first aspect of the invention, the reflected light from the lower end of the reflecting mirror on the wall surface side does not enter the reflecting mirror portion on the side opposite to the wall surface.
【００１１】この構成の照明器具においては、上記発明
の効果に加えて、対向する反射鏡からの反射光による二
次反射光の影響をなくして照射面の光むらや光スジの形
成を抑制し照明の均斉度を向上することが可能となる。In addition to the effects of the above-mentioned invention, the luminaire having this structure eliminates the influence of the secondary reflected light due to the reflected light from the opposing reflecting mirror to suppress the formation of light unevenness and light streaks on the irradiation surface. It is possible to improve the uniformity of lighting.
【００１２】[0012]
【発明の実施の形態】以下、本発明の一実施形態に係る
照明器具について、図１乃至図７を参照して説明する。
図面中の共通する部材には同一符号を付して重複説明を
省略する。本発明における照明器具の基本構成を図１に
示す。照明器具１は、屋内壁面等の照射面２に近接し
て、光源である直管蛍光灯ランプ４を照射面２に平行に
設置し、照射面２の広範囲に亘る照明の均斉度向上を実
現するものである。その反射鏡６０は、図１に示すよう
に、ランプ４の中心を焦点Ｆとする放物線を断面形状と
して有しており、放物線による光軸の傾きα、つまり放
物線の軸Ｘと照射面２（鉛直線Ｔ）のなす角度、として
５゜の傾きを持たせて設置されている。そして、照射面
２の上方から下方まで広い範囲に亘って照明するため
に、ランプ４の中心に対して照射面２と反対側にある反
射面６ａの面積が照射面２の側の反射面６ｂよりも大き
い構成になっている。よく知られているように放物線
は、その焦点Ｆに置かれた点光源からの光を反射すると
きは、全てその光軸Ｘに平行に反射する。従って、この
指向性のため、放物線形状の反射鏡を適切な構造と構成
として配置することにより、照射面２に向かわない後ろ
向きの光も、反射鏡６０により前方に反射されて光源の
有効利用が行われる。また、前記光軸の傾きαを適切に
選び、照射面２の上下の照射範囲を最適化することがで
きる。さらには、実際の光源が点光源ではないことや、
完全な放物線形状からずらした例えば略放物線形状の反
射鏡面とすること、あるいは、反射面の拡散反射率を最
適化することにより照射面における照明の均斉度をあげ
ることができる。DETAILED DESCRIPTION OF THE INVENTION A lighting apparatus according to an embodiment of the present invention will be described below with reference to FIGS.
Common members in the drawings are denoted by the same reference numerals, and duplicate description will be omitted. FIG. 1 shows the basic configuration of a lighting fixture according to the present invention. The lighting fixture 1 has a straight tube fluorescent lamp 4 as a light source installed in parallel with the irradiation surface 2 such as an indoor wall surface, so as to improve the uniformity of illumination over a wide range of the irradiation surface 2. To do. As shown in FIG. 1, the reflecting mirror 60 has a parabola whose cross section is a focus F at the center of the lamp 4, and the inclination α of the optical axis due to the parabola, that is, the axis X of the parabola and the irradiation surface 2 ( It is installed with an inclination of 5 ° as the angle formed by the vertical line T). In order to illuminate a wide range from the upper side to the lower side of the irradiation surface 2, the area of the reflection surface 6a on the side opposite to the irradiation surface 2 with respect to the center of the lamp 4 is the reflection surface 6b on the irradiation surface 2 side. It has a larger configuration. As is well known, when a parabola reflects light from a point source placed at its focal point F, it reflects all parallel to its optical axis X. Therefore, because of this directivity, by arranging a parabolic reflector with an appropriate structure and configuration, even backward light that does not face the irradiation surface 2 is reflected forward by the reflector 60, and the light source can be effectively used. Done. Further, the inclination α of the optical axis can be appropriately selected to optimize the irradiation range above and below the irradiation surface 2. Furthermore, the fact that the actual light source is not a point light source,
The uniformity of illumination on the irradiation surface can be increased by using a reflecting mirror surface having a substantially parabolic shape deviated from a perfect parabolic shape or by optimizing the diffuse reflectance of the reflecting surface.
【００１３】上記の照明器具１の実施態様を図２に示
す。図２（ａ）に示されるように、直管形の蛍光ランプ
４が両端の電力供給用ソケット４１に挿入保持され、背
後に反射鏡６を備えて、照明器具１が構成されている。
図２（ｂ）あるいは図２（ｃ）に示されるように、照明
器具１の断面形状は、ランプ等を納める筐体である本体
７の外形により略正方形になっている。本体７のその上
部または右部が天井や壁面への取付け部であり、下面及
び左方下面に光照射のための透光開口５が形成されてい
る。本体７の内部には、斜めにはしる反射鏡取付台８が
あり、つまみねじ８ａにより反射鏡６が固定されてい
る。反射鏡６は放物線又は楕円を含む略放物線状の鏡面
及び直線部分の鏡面を有し、この直線部分６ｃを利用し
て反射鏡６が安定に固定されている。そして、ランプ４
が、本体端板１３に設けられたソケットにその電極を挿
入保持されて主反射鏡面４の焦点Ｆの位置に配置されて
いる。An embodiment of the lighting fixture 1 described above is shown in FIG. As shown in FIG. 2A, the straight tube type fluorescent lamp 4 is inserted and held in the power supply sockets 41 at both ends, and the reflecting mirror 6 is provided behind the lighting fixture 1.
As shown in FIG. 2 (b) or FIG. 2 (c), the cross-sectional shape of the lighting fixture 1 is substantially square due to the outer shape of the main body 7 which is a housing for housing the lamp and the like. The upper portion or the right portion of the main body 7 is a mounting portion to the ceiling or the wall surface, and the light transmitting opening 5 for light irradiation is formed on the lower surface and the left lower surface. Inside the main body 7, there is a slanting reflecting mirror mount 8, and the reflecting mirror 6 is fixed by a thumbscrew 8a. The reflecting mirror 6 has a substantially parabolic mirror surface including a parabola or an ellipse and a linear mirror surface, and the linear mirror 6c is used to stably fix the reflecting mirror 6. And lamp 4
However, the electrode is inserted and held in a socket provided in the main body end plate 13 and arranged at the position of the focal point F of the main reflecting mirror surface 4.
【００１４】次に、上記の照明器具１の設置について説
明する。照明器具１は、単独あるいは連結して、図３
（ａ）に示すように、屋内壁面等の照射面２に近接した
天井面３に設けられた長尺の天井堀込み３１に、光源で
ある直管形ランプ４を照射面２に平行にして納めらる。
照射面２の幅方向及び上下方向の広い面積に亘っていわ
ゆるウォールウォッシャー照明を行うために用いられ
る。照明器具１が納められる照射面６からの距離Ｌは１
０ｃｍから２０ｃｍの範囲である。Next, the installation of the lighting fixture 1 will be described. The luminaire 1 may be used alone or in combination as shown in FIG.
As shown in (a), a straight tube lamp 4 as a light source is placed parallel to the irradiation surface 2 in a long ceiling dug 31 provided on a ceiling surface 3 close to the irradiation surface 2 such as an indoor wall surface. Pay.
It is used for performing so-called wall washer illumination over a wide area of the irradiation surface 2 in the width direction and the vertical direction. The distance L from the irradiation surface 6 in which the lighting fixture 1 is housed is 1
It is in the range of 0 cm to 20 cm.
【００１５】上記のように、本発明の照明器具１を天井
取り付けによる壁面照射用照明器具として用いる場合の
照明の均斉度向上について説明する。この照明器具１の
反射鏡６は、前述したようにランプ４を焦点とした放物
線形状の反射面の一部に、その放物線よりも曲率が小さ
い曲線または直線部分６ｃを備えている。この放物線よ
りも曲率が小さい反射面として設けた直線部分６ｃにお
いて、ランプ４に近い側の反射点Ｍでは、点線で示した
放物線形状の反射鏡６０の場合よりも反射面の法線が上
向きとなり水平に近づくため、照射面上の照射点が反射
鏡６０の場合よりも上方に移動する。また、直線部分６
ｃにおいて、ランプ４から遠い側の反射点Ｎでは反射面
の法線が点線で示した放物線形状の反射鏡６０の場合よ
りも下向きとなるため、照射点は反射鏡６０の場合より
も下方に移動する。このことは、直線部分６ｃにおい
て、放物線形状の場合よりも広がるように光が反射され
ることを示す。図３（ｂ）に示されるように、放物線形
状の反射鏡６０の場合には、直接光だけによる照明面Ｄ
と反射光を含む光による照明面Ｒ０の境界部分Ａが照射
面に明暗の照明むらとして現れている。これに対し、本
発明の直線部分６ｃを有する反射鏡６による照明では、
図３（ａ）に示されるように、前記境界部分Ａを越え
て、境界部分Ａ’まで反射光による光を注ぐことがで
き、反射光を含む照射面はＲ１まで広がる。同様に、ラ
ンプ４から遠い反射点Ｎでは、反射光がより遠くに、つ
まり、より下方に向けられる。このように、照射面２に
おける直射光と反射光の境の領域Ｗに光を補うことがで
きるため、光むらをなくし均斉度向上の効果がある。As described above, the improvement of the uniformity of lighting when the lighting fixture 1 of the present invention is used as a lighting fixture for wall illumination by ceiling mounting will be described. As described above, the reflecting mirror 6 of the luminaire 1 is provided with a curved or straight line portion 6c having a curvature smaller than that of the parabola on a part of the parabolic reflection surface on which the lamp 4 is focused. In the straight line portion 6c provided as a reflecting surface having a curvature smaller than that of the parabola, at the reflecting point M on the side closer to the lamp 4, the normal line of the reflecting surface is upward as compared with the case of the parabolic reflecting mirror 60 shown by the dotted line. Since it approaches horizontal, the irradiation point on the irradiation surface moves upward as compared with the case of the reflecting mirror 60. Also, the straight part 6
In c, at the reflection point N on the side far from the lamp 4, the normal line of the reflection surface is lower than in the case of the parabolic reflection mirror 60 shown by the dotted line, so the irradiation point is lower than in the case of the reflection mirror 60. Moving. This means that the light is reflected so that it spreads more in the straight line portion 6c than in the case of the parabolic shape. As shown in FIG. 3B, in the case of the parabolic reflecting mirror 60, the illumination surface D by only the direct light is used.
The boundary portion A of the illumination surface R0 due to the light including the reflected light appears as bright and dark illumination unevenness on the irradiation surface. On the other hand, in the illumination by the reflecting mirror 6 having the linear portion 6c of the present invention,
As shown in FIG. 3A, the reflected light can be poured to the boundary portion A ′ beyond the boundary portion A, and the irradiation surface including the reflected light spreads to R1. Similarly, at a reflection point N farther from the lamp 4, the reflected light is directed further, that is, further downward. In this way, the light can be supplemented to the area W between the direct light and the reflected light on the irradiation surface 2, so that there is an effect of eliminating uneven light and improving the uniformity.
【００１６】次に、本発明の照明器具１を天井取付けに
よる壁面照射用照明器具として用いる場合、二次反射光
を無くすことによる照明の均斉度向上について説明す
る。図４（ａ）に示されるように、反射鏡６の照明面２
の側にある反射面６ｂの下端は、照明面２から遠い反射
面６ａからはランプ４の蔭になって見えない配置と構造
になっている。そのため、反射面６ｂからの反射光は反
射面６ａには入射しない。図４（ｂ）に示されるよう
に、反射面６ｂの下端が反射面６ａから見える場合に
は、ランプ４からの光が反射面６ｂから一次反射光ＦＲ
として反射面６ａに入射し、二次反射光ＳＲとして照射
面２を照射する。この二次反射光による光は照射面にお
いて領域Ｓを照明するが、その上端Ｂは、反射面６ｂの
下端部という明確な境界を持った反射光による照明の境
界であるため、明暗の光むらが明確に現れる。従って二
次反射は確実に抑える必要がある。この点、図４（ａ）
に示される照明器具は、反射面６ｂには、ここから発せ
られる反射光が照射方向と反対側の反射面６ａに反射す
るような反射面は設けていないため、二次反射光を無く
すことができて照明の均斉度向上が図れる。反射鏡の反
射面表面は、拡散反射率４０〜８０％としている。これ
により、反射面における直接反射光の指向性と散乱光に
よる拡散効果により適切な照明が達成できる。上記の反
射鏡６の構造により、照明器具１の設置場所は、照明器
具１と照射面との距離Ｌを約１０〜２０ｃｍ程度と非常
に小さくすることができる。Next, when the lighting fixture 1 of the present invention is used as a ceiling-mounted lighting fixture for wall illumination, the improvement of the uniformity of lighting by eliminating the secondary reflected light will be described. As shown in FIG. 4A, the illumination surface 2 of the reflecting mirror 6
The lower end of the reflecting surface 6b on the side of is the arrangement and structure invisible to the lamp 4 from the reflecting surface 6a far from the illumination surface 2. Therefore, the reflected light from the reflecting surface 6b does not enter the reflecting surface 6a. As shown in FIG. 4B, when the lower end of the reflecting surface 6b is visible from the reflecting surface 6a, the light from the lamp 4 is the primary reflected light FR from the reflecting surface 6b.
Is incident on the reflecting surface 6a, and the irradiation surface 2 is irradiated with the secondary reflected light SR. The light due to the secondary reflected light illuminates the area S on the irradiation surface, but the upper end B thereof is the boundary of the illumination due to the reflected light having a clear boundary of the lower end of the reflecting surface 6b. Appears clearly. Therefore, it is necessary to surely suppress the secondary reflection. In this respect, FIG. 4 (a)
In the luminaire shown in FIG. 2, since the reflective surface 6b is not provided with a reflective surface such that the reflected light emitted from the reflective surface is reflected by the reflective surface 6a on the side opposite to the irradiation direction, the secondary reflected light can be eliminated. As a result, the uniformity of lighting can be improved. The surface of the reflecting surface of the reflecting mirror has a diffuse reflectance of 40 to 80%. Thereby, appropriate illumination can be achieved by the directivity of the directly reflected light on the reflecting surface and the diffusion effect of the scattered light. Due to the structure of the reflecting mirror 6 described above, the installation location of the lighting fixture 1 can be made very small with the distance L between the lighting fixture 1 and the irradiation surface being about 10 to 20 cm.
【００１７】次に、本発明の一実施形態に係る照明器具
の変形例について説明する。図５の照明器具１は、直角
三角形の直角をはさむ２辺を水平及び鉛直とし、斜辺を
下方に有する三角形状を側面とした本体７の、四角形と
なる下面にガラス板Ｇを有した透光開口部５を備えてい
る。本体７の内部にハロゲンランプ４を備えている。こ
のような照明器具１は、ランプ４が照射面に平行となる
ようにして本体７を支持具７１により吊り下げられ、そ
の支持具７１は照明すべき照射面近傍の天井面３に固定
されたフランジ７２に取り付けられて用いられる。ま
た、照明器具１の本体７と支持具７１との接続部７３
は、照射方向の角度調整が可能なように半固定式になっ
ている。Next, a modified example of the lighting fixture according to the embodiment of the present invention will be described. The luminaire 1 of FIG. 5 has a glass plate G on the lower surface of a quadrangle of a main body 7 whose horizontal and vertical sides are two sides sandwiching a right angle of a right triangle and whose sides are a triangular shape having a hypotenuse side. An opening 5 is provided. A halogen lamp 4 is provided inside the main body 7. In such a lighting fixture 1, the main body 7 is suspended by a support 71 so that the lamp 4 is parallel to the irradiation surface, and the support 71 is fixed to the ceiling surface 3 near the irradiation surface to be illuminated. It is used by being attached to the flange 72. In addition, a connecting portion 73 between the main body 7 of the lighting fixture 1 and the support 71
Is semi-fixed so that the angle of the irradiation direction can be adjusted.
【００１８】上記の照明器具１の内部には、図６に示さ
れるように、略放物線形状を有する反射鏡６が、ハロゲ
ンランプ４の中心を放物線の焦点とし、放物線の光軸の
傾きαが、照射面と平行になる本体７の鉛直面に対して
０゜＜α＜１０゜となるように設けられている。また、
反射鏡６は光源を焦点とした前記略放物線形状の反射面
の他に、照射面（不図示）に対向する反射面６ａの一部
に、そこに形成されるべき放物線よりも曲率が小さい曲
線から形成される反射面部分６ｃを備えている。さら
に、反射鏡６は、照射面側の反射面６ｂから発せられる
反射光が反対側の反射面６ａへ反射するような反射面が
ない構造となっている。また、ランプ４の軸端部分に
も、前方に向けてランプ４の光反射する反射鏡６ｄ，６
ｄが設けられている。As shown in FIG. 6, a reflecting mirror 6 having a substantially parabolic shape is provided inside the lighting fixture 1 with the center of the halogen lamp 4 as the focal point of the parabola and the inclination α of the optical axis of the parabola. , 0 ° <α <10 ° with respect to the vertical plane of the main body 7 which is parallel to the irradiation surface. Also,
The reflecting mirror 6 is a curved surface having a curvature smaller than that of a parabola to be formed in a part of the reflecting surface 6a facing the irradiation surface (not shown) in addition to the above-mentioned substantially parabolic reflecting surface having a light source as a focus. The reflective surface portion 6c is formed of. Further, the reflecting mirror 6 does not have a reflecting surface such that the reflected light emitted from the reflecting surface 6b on the irradiation surface side is reflected to the reflecting surface 6a on the opposite side. Further, also on the axial end portion of the lamp 4, reflecting mirrors 6d, 6 for reflecting the light of the lamp 4 toward the front are provided.
d is provided.
【００１９】上記のような構成により、ランプ４からの
直接光のみによる照明部分と反射光による照明を含む部
分との境界領域の光むらや、従来例の図１０に示された
ような二次反射光による光スジは発生しない。また、反
射鏡の反射面表面は、拡散反射率４０〜８０％としてい
る。これらの効果は、前記の実施形態と同様である。With the above-described structure, light unevenness in the boundary region between the portion illuminated by only the direct light from the lamp 4 and the portion including illumination by the reflected light and the secondary as shown in FIG. 10 of the conventional example. Optical streaks due to reflected light do not occur. The surface of the reflecting surface of the reflecting mirror has a diffuse reflectance of 40 to 80%. These effects are similar to those of the above-described embodiment.
【００２０】次に、本発明の実施形態に係る照明器具の
さらに他の変形例について説明する。図７の照明器具１
は、四角柱の一端を斜めに切断した外形の本体７を有
し、四角柱の上面を天井面３への固定面とし、下面にく
る四角形状の断面部分を透光開口５としている。照明器
具１は、透光開口５にガラス板Ｇを備え、本体７の内部
にＨＩＤダブルエンドランプ４と断面形状が略放物線と
なる反射鏡６とを備えている。このような照明器具１
は、照明すべき照射面近傍の天井に、ランプ４が照射面
に平行になるようにして四角柱形状の本体７の上面を固
定して取り付けて用いられる。Next, still another modification of the lighting equipment according to the embodiment of the present invention will be described. Lighting equipment 1 of FIG.
Has a main body 7 having an outer shape in which one end of a quadrangular prism is obliquely cut, the upper surface of the quadrangular prism serves as a fixing surface to the ceiling surface 3, and the rectangular cross-section portion on the lower surface serves as a light transmitting opening 5. The lighting fixture 1 is provided with a glass plate G in the translucent opening 5, and a HID double-end lamp 4 and a reflecting mirror 6 having a substantially parabolic cross section inside a main body 7. Such a lighting fixture 1
Is used by fixing the upper surface of the quadrangular prism-shaped main body 7 to the ceiling near the irradiation surface to be illuminated so that the lamp 4 is parallel to the irradiation surface.
【００２１】上記の反射鏡６は、ＨＩＤダブルエンドラ
ンプ４の中心軸を略放物線の焦点とし、放物線の光軸の
傾きαが、照射面と平行になる本体７の鉛直面に対して
０゜＜α＜１０゜となるように設けられている。また、
反射鏡６は光源を焦点とした前記略放物線形状の反射面
の他に、照射面（不図示）に対向する反射面６ａの一部
に、そこに形成されるべき放物線よりも曲率が小さい曲
線から形成される反射面部分６ｃを備えている。さら
に、反射鏡６は、照射面側の反射面６ｂから発せられる
反射光が反対側の反射面６ａへ反射するような反射面が
ない構造となっている。また、ランプ４の軸端部分に
も、前方に向けてランプ４の光反射する反射鏡６ｄ，６
ｄが設けられている。The reflecting mirror 6 has the central axis of the HID double-end lamp 4 as the focal point of a substantially parabola, and the inclination α of the optical axis of the parabola is 0 ° with respect to the vertical plane of the main body 7 which is parallel to the irradiation surface. It is provided such that <α <10 °. Also,
The reflecting mirror 6 is a curved surface having a curvature smaller than that of a parabola to be formed in a part of the reflecting surface 6a facing the irradiation surface (not shown) in addition to the above-mentioned substantially parabolic reflecting surface having a light source as a focus. The reflective surface portion 6c is formed of. Further, the reflecting mirror 6 does not have a reflecting surface such that the reflected light emitted from the reflecting surface 6b on the irradiation surface side is reflected to the reflecting surface 6a on the opposite side. Further, also on the axial end portion of the lamp 4, reflecting mirrors 6d, 6 for reflecting the light of the lamp 4 toward the front are provided.
d is provided.
【００２２】上記のような構成により、ランプ４からの
直接光のみによる照明部分と反射光による照明を含む部
分との境界領域の光むらや、従来例の図１０に示された
ような二次反射光による光スジは発生しない。また、反
射鏡の反射面表面は、拡散反射率４０〜８０％としてい
る。これらの効果は、前記第一の実施形態と同様であ
る。With the above-described structure, light unevenness in the boundary region between the portion illuminated by only the direct light from the lamp 4 and the portion including illumination by the reflected light and the secondary as shown in FIG. 10 of the conventional example. Optical streaks due to reflected light do not occur. The surface of the reflecting surface of the reflecting mirror has a diffuse reflectance of 40 to 80%. These effects are similar to those of the first embodiment.
【００２３】なお、本発明は、上記構成に限られること
なく種々の変形が可能である。例えば、放物線形状の反
射鏡の傾斜角を５゜として説明したがこれに限るもので
はない。また、反射面は板状のものから構成する必要は
なく、表面に所望の反射面が構成されていればよい。The present invention is not limited to the above construction, and various modifications can be made. For example, the tilt angle of the parabolic reflecting mirror has been described as 5 °, but the tilt angle is not limited to this. Further, the reflecting surface does not have to be formed of a plate-like member, and it is sufficient that the desired reflecting surface is formed on the surface.
【００２４】[0024]
【発明の効果】以上のように請求項１の発明によれば、
光源を焦点とする略放物線状の反射面を設けたことによ
り、光源からの光を有効利用すると共に、光源からの光
に指向性を持たせることができ、さらに、放物線の光軸
の傾きαが、照射面に対して０゜＜α＜１０゜となるよ
うに設定しているので、照射面の広範囲に亘って従来よ
り飛躍的に高い均斉度の良い照明を行うことができる。As described above, according to the invention of claim 1,
By providing a substantially parabolic reflecting surface with the light source as the focal point, it is possible to effectively use the light from the light source and to give the light from the light source directivity. Furthermore, the inclination α of the optical axis of the parabola is used. However, since it is set such that 0 ° <α <10 ° with respect to the irradiation surface, it is possible to perform illumination with a significantly higher degree of uniformity than in the past over a wide range of the irradiation surface.
【００２５】また、請求項２の発明によれば、上記発明
の効果に加えて、反射鏡の一部に曲率の小さい断面の部
分を設けたことにより、この部分において反射する光は
曲率が大きなままの場合よりも光の広がりを大きくする
ことができ、照射面上における直接光と反射光の境界部
分にこの構成を適用して照明の均斉度を向上することが
可能となる。According to the invention of claim 2, in addition to the effect of the invention described above, since a part of the cross section having a small curvature is provided in a part of the reflecting mirror, the light reflected at this part has a large curvature. The spread of light can be made larger than it is, and it becomes possible to improve the uniformity of illumination by applying this configuration to the boundary portion between the direct light and the reflected light on the irradiation surface.
【００２６】また、請求項３の発明によれば、上記発明
の効果に加えて、対向する反射鏡面からの反射光による
二次反射光の影響をなくしているため、照射面の光むら
や光スジの形成を抑制でき、照明の均斉度を向上するこ
とが可能となる。Further, according to the invention of claim 3, in addition to the effect of the above invention, since the influence of the secondary reflected light due to the reflected light from the reflecting mirror surface facing is eliminated, the light unevenness and the light on the irradiation surface are eliminated. It is possible to suppress the formation of streaks and improve the uniformity of lighting.
【図１】 本発明の一実施形態による照明器具の基本構
成を示す横断面図。FIG. 1 is a cross-sectional view showing a basic configuration of a lighting fixture according to an embodiment of the present invention.
【図２】 （ａ）は直管形蛍光ランプを用いた上記照明
器具の具体例を示す正面図、（ｂ）は同側面図、（ｃ）
は同詳細側面図。FIG. 2A is a front view showing a specific example of the lighting fixture using a straight tube fluorescent lamp, FIG. 2B is a side view of the same, and FIG.
Is a detailed side view of the same.
【図３】 （ａ）は同上の取付け状態を示す横断面図、
（ｂ）は反射光境界未対策の比較例である照明器具の取
付け状態を示す横断面図。FIG. 3 (a) is a cross-sectional view showing the same attachment state as above,
FIG. 6B is a transverse cross-sectional view showing a mounting state of a lighting fixture that is a comparative example in which a reflected light boundary is not taken.
【図４】 （ａ）は同上の取付け状態を示す横断面図、
（ｂ）は二次反射光未対策の比較例である照明器具の取
付け状態を示す横断面図。FIG. 4 (a) is a cross-sectional view showing the same attachment state as above,
(B) is a cross-sectional view showing a mounting state of a lighting fixture which is a comparative example in which secondary reflected light is not taken.
【図５】 （ａ）はハロゲンランプを用いた本発明の一
実施形態の変形例による照明器具の側面図、（ｂ）は同
正面図。FIG. 5A is a side view of a lighting fixture using a halogen lamp according to a modification of the embodiment of the present invention, and FIG. 5B is a front view of the same.
【図６】 （ａ）は同上照明器具の側面図、（ｂ）は同
正面図。FIG. 6 (a) is a side view of the same lighting fixture, and FIG. 6 (b) is a front view thereof.
【図７】 （ａ）はＨＩＤダブルエンドランプを用いた
本発明の一実施形態の他の変形例による照明器具の側面
図、（ｂ）は同正面図。FIG. 7A is a side view of a lighting fixture according to another modification of the embodiment of the present invention using the HID double end lamp, and FIG. 7B is a front view of the same.
【図８】 従来の照明器具による壁面照明を示す横断面
図。FIG. 8 is a cross-sectional view showing wall surface illumination by a conventional lighting fixture.
【図９】 反射鏡を備えた従来の照明器具による壁面照
明を示す横断面図。FIG. 9 is a transverse cross-sectional view showing wall surface illumination by a conventional luminaire having a reflecting mirror.
【図１０】 同上の他の例を示す示す横断面図。FIG. 10 is a cross-sectional view showing another example of the above.
１ 照明器具 ２ 照射面 ３ 天井面 ４ ランプ（光源） ５ 透光開口 ６、６０、６１、６２ 反射鏡 Ｆ 焦点 α 光軸の傾き 1 lighting equipment 2 irradiation surface 3 ceiling surface 4 lamps (light source) 5 translucent aperture 6, 60, 61, 62 Reflector F focus α Optical axis tilt
Claims (3)
た透光開口から壁面を照射する照明器具であって、 放物線又は楕円を含む略放物線状曲線の断面形状を有す
る反射鏡を備え、前記反射鏡の焦点に光源を有し、 前記反射鏡の光軸の傾きαが、壁面方向に０゜＜α＜１
０゜となるようにしたことを特徴とする照明器具。1. A luminaire which is provided close to a wall surface and irradiates the wall surface through a light-transmitting opening provided on a lower surface side, and which includes a reflecting mirror having a cross-section of a substantially parabolic curve including a parabola or an ellipse. , A light source is provided at the focal point of the reflecting mirror, and the inclination α of the optical axis of the reflecting mirror is 0 ° <α <1 in the wall surface direction.
A lighting fixture characterized by being set at 0 °.
略放物線状曲線と、その放物線又は略放物線状曲線より
曲率が小さい曲線又は直線とから形成され、 壁面とは反対側の反射鏡部分に、前記放物線又は略放物
線状曲線より曲率が小さい曲線又は直線となる部分を有
することを特徴とする請求項１記載の照明器具。2. The reflecting mirror is formed by a parabola or a substantially parabolic curve having a light source as a focus and a curve or a straight line having a curvature smaller than that of the parabola or the substantially parabolic curve, and the reflecting mirror portion opposite to the wall surface. The lighting fixture according to claim 1, further comprising a portion having a curve or a straight line having a curvature smaller than that of the parabola or the substantially parabolic curve.
面とは反対側の反射鏡部分に入射しないようにしたこと
を特徴とする請求項１記載の照明器具。3. The luminaire according to claim 1, wherein the reflected light from the lower end of the wall-side reflecting mirror does not enter the reflecting mirror portion on the side opposite to the wall surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002084948A JP4089258B2 (en) | 2002-03-26 | 2002-03-26 | lighting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002084948A JP4089258B2 (en) | 2002-03-26 | 2002-03-26 | lighting equipment |
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| Publication Number | Publication Date |
|---|---|
| JP2003281910A true JP2003281910A (en) | 2003-10-03 |
| JP4089258B2 JP4089258B2 (en) | 2008-05-28 |
Family
ID=29232085
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002084948A Expired - Fee Related JP4089258B2 (en) | 2002-03-26 | 2002-03-26 | lighting equipment |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008098088A (en) * | 2006-10-16 | 2008-04-24 | Mirai:Kk | Wide region lighting device |
| JP2008542987A (en) * | 2005-05-25 | 2008-11-27 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Lighting system, shelf lighting system and wall washer lighting system |
| JP2011067113A (en) * | 2009-09-24 | 2011-04-07 | Nishizawa Gakuen | Lightening device for fancy fish aquarium |
| JP2011187306A (en) * | 2010-03-09 | 2011-09-22 | Itl Kk | Wall lighting system using led |
| JP2016206559A (en) * | 2015-04-28 | 2016-12-08 | 日立マクセル株式会社 | Projector, and image projecting method using the same |
| JP2019207892A (en) * | 2015-12-17 | 2019-12-05 | エル イー エス エス・リミテッド | Optical fiber light source with composite overcoating structure |
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2002
- 2002-03-26 JP JP2002084948A patent/JP4089258B2/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008542987A (en) * | 2005-05-25 | 2008-11-27 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Lighting system, shelf lighting system and wall washer lighting system |
| JP2008098088A (en) * | 2006-10-16 | 2008-04-24 | Mirai:Kk | Wide region lighting device |
| JP2011067113A (en) * | 2009-09-24 | 2011-04-07 | Nishizawa Gakuen | Lightening device for fancy fish aquarium |
| JP2011187306A (en) * | 2010-03-09 | 2011-09-22 | Itl Kk | Wall lighting system using led |
| JP2016206559A (en) * | 2015-04-28 | 2016-12-08 | 日立マクセル株式会社 | Projector, and image projecting method using the same |
| JP2019207892A (en) * | 2015-12-17 | 2019-12-05 | エル イー エス エス・リミテッド | Optical fiber light source with composite overcoating structure |
| US11061177B2 (en) | 2015-12-17 | 2021-07-13 | L.E.S.S. Ltd. | Optical fiber light source with composite overcoating structure |
| US11719873B2 (en) | 2015-12-17 | 2023-08-08 | L.E.S.S. Ltd | Optical fiber light source with composite overcoating structure |
| CN112555749A (en) * | 2020-12-09 | 2021-03-26 | 王庆龙 | Solar street lamp |
| CN112555749B (en) * | 2020-12-09 | 2022-07-26 | 山东明碁照明有限公司 | Solar street lamp |
| CN113090978A (en) * | 2021-03-29 | 2021-07-09 | 武汉上上电气工程有限公司 | Adjustable illumination scope projecting lamp mounting structure of many topography |
| CN113090978B (en) * | 2021-03-29 | 2022-04-22 | 武汉上上电气工程有限公司 | Adjustable illumination scope projecting lamp mounting structure of many topography |
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