JPS5942403B2 - Lighting equipment reflector - Google Patents
Lighting equipment reflectorInfo
- Publication number
- JPS5942403B2 JPS5942403B2 JP53007533A JP753378A JPS5942403B2 JP S5942403 B2 JPS5942403 B2 JP S5942403B2 JP 53007533 A JP53007533 A JP 53007533A JP 753378 A JP753378 A JP 753378A JP S5942403 B2 JPS5942403 B2 JP S5942403B2
- Authority
- JP
- Japan
- Prior art keywords
- reflector
- longitudinal direction
- lighting equipment
- parabola
- focal length
- 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.)
- Expired
Links
Landscapes
- Lenses (AREA)
- Light Sources And Details Of Projection-Printing Devices (AREA)
Description
【発明の詳細な説明】 本発明は照明器具の反射板に関する。[Detailed description of the invention] The present invention relates to a reflector for a lighting device.
従来、直管螢光ランプ等の長手の光源を用いた反射板と
しては、第１図に示すごとき反射板１が用いられている
。Conventionally, a reflector 1 as shown in FIG. 1 has been used as a reflector using a longitudinal light source such as a straight tube fluorescent lamp.
この反射板を用いて黒板や壁画を照らす場合は、反射板
１の長手方向（ｘ軸）を、第２図に示すように、照射面
３と平行に配置する。しかして照射面で長手方向に垂直
な方向（Ｙｓ軸方向）の照度分布は、器具の長手方向に
垂直な反射板形状を変化させることにより行われている
。しかして長手方向（ｘｓ軸方向）の照度分布について
は、これを制御していない。従つて器具正面は明るく、
周囲が暗くなる傾向を有する。従来の反射板を用いた場
合、正面だけが明るくなるのは第３図に示すように強い
反射光は、すべて正面に向うからである。本発明は上記
の欠点を改善し、器具の長手方向への照度を調節しうる
照明器具反射板を提供しようとするものである。When this reflector is used to illuminate a blackboard or a mural, the longitudinal direction (x-axis) of the reflector 1 is arranged parallel to the irradiation surface 3, as shown in FIG. The illuminance distribution in the direction perpendicular to the longitudinal direction (Ys axis direction) on the irradiation surface is achieved by changing the shape of the reflector perpendicular to the longitudinal direction of the instrument. However, the illuminance distribution in the longitudinal direction (xs-axis direction) is not controlled. Therefore, the front of the appliance is bright,
The surroundings tend to become dark. When a conventional reflector is used, only the front becomes bright because all of the strong reflected light is directed toward the front, as shown in FIG. The present invention aims to improve the above-mentioned drawbacks and provide a lighting equipment reflector that can adjust the illuminance in the longitudinal direction of the equipment.
次に本発明の照明器具の実施例を添附図面について説明
する。Next, embodiments of the lighting fixture of the present invention will be described with reference to the accompanying drawings.
第４図は本発明の一実施例を示すもので、この反射板１
は２つの放物線を有する面１ａ、１ｂＶＣより形成され
るもので、反射板１の長手方向に沿つて断面した形状を
第５図に示す。FIG. 4 shows an embodiment of the present invention, in which the reflector 1
is formed from two parabolic surfaces 1a and 1bVC, and the cross-sectional shape of the reflector 1 taken along the longitudinal direction is shown in FIG.
第５図に示されるように、この反射板１は放物線ａ（焦
点Ｏａ）と放物線ｂ（焦点Ｏｂ）とにより形成され、焦
点と反射板の中心Ｍとの距離（焦点距離）は０ｂＭ＜０
ａＭ
の関係にある。As shown in FIG. 5, this reflective plate 1 is formed by a parabola a (focal point Oa) and a parabola b (focal point Ob), and the distance (focal length) between the focal point and the center M of the reflective plate is 0bM<0.
The relationship is aM.
ランプ２よりの光が反射板１により反射された光路は第
６図に示すようであり、ランプ２の中央部から出る光は
放物線をで反射され、ランプ２の周辺部から出る光は放
物線ａで反射さわ、周辺部は明るくなる。なお、反射体
の長手方向に垂直な平面による断面の形状は、円形でも
よい。The optical path of the light from the lamp 2 reflected by the reflector 1 is as shown in FIG. When the light is reflected, the surrounding area becomes brighter. Note that the shape of the cross section taken by a plane perpendicular to the longitudinal direction of the reflector may be circular.
本発明は叙上のように、クラ状をなし、かつ直管状のラ
ンプの表面を包むように形成すると共に、長手方向の一
部に放物線状の反りを形成し、かつ該反りは２種の放物
線で形成され、中心側の放物線の焦点距離は周辺部の放
物線の焦点距離よりも１ 小に構成したから、器具の正
面のみが明るくなるのを防ぎ、器具から離れた方へ、光
を反射せしめ広範囲に明るくし、照度の不均衡を減らす
ことができる効果を有する。As described above, the present invention is formed so as to wrap around the surface of a straight tube-shaped lamp, and a parabolic curvature is formed in a part of the longitudinal direction, and the curvature has two types of parabolic shapes. The focal length of the parabola on the center side is 1 mm smaller than the focal length of the parabola on the periphery, which prevents only the front of the fixture from becoming bright and reflects light away from the fixture. It has the effect of brightening a wide area and reducing illuminance imbalance.
第１図ないし第３図は従来の反射板、第４図は本発明の
反射板の一実施費曵第５図は長手方向に沿う断面図、第
６図は光路を示す。
ｔ板、２・・・・ランプ、３・・・・照射面。1 to 3 show a conventional reflector, FIG. 4 shows the implementation cost of the reflector of the present invention, FIG. 5 is a sectional view along the longitudinal direction, and FIG. 6 shows an optical path. T-plate, 2...lamp, 3...irradiation surface.
Claims (1)
うに形成すると共に、長手方向の一部に放物線状の反り
を形成し、かつ該反りは２種の放物線で形成され、中心
側の放物線の焦点距離は周辺部の放物線の焦点距離より
も小であることを特徴とした照明器具反射板。1 It is shaped like a crab and is formed so as to wrap around the surface of the straight tube-shaped lamp, and at the same time forms a parabolic curvature in a part of the longitudinal direction, and the curvature is formed by two types of parabolas. A lighting equipment reflector characterized in that the focal length of the parabola is smaller than the focal length of a peripheral parabola.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53007533A JPS5942403B2 (en) | 1978-01-25 | 1978-01-25 | Lighting equipment reflector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53007533A JPS5942403B2 (en) | 1978-01-25 | 1978-01-25 | Lighting equipment reflector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54100174A JPS54100174A (en) | 1979-08-07 |
| JPS5942403B2 true JPS5942403B2 (en) | 1984-10-15 |
Family
ID=11668416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP53007533A Expired JPS5942403B2 (en) | 1978-01-25 | 1978-01-25 | Lighting equipment reflector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5942403B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4356538A (en) * | 1980-08-04 | 1982-10-26 | Polaroid Corporation | Photographic lighting apparatus |
| US4355350A (en) * | 1980-09-02 | 1982-10-19 | Polaroid Corporation | Reflector for use in an artificial lighting device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4941312U (en) * | 1972-07-14 | 1974-04-11 | ||
| JPS50130286A (en) * | 1974-03-30 | 1975-10-15 |
-
1978
- 1978-01-25 JP JP53007533A patent/JPS5942403B2/en not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4941312U (en) * | 1972-07-14 | 1974-04-11 | ||
| JPS50130286A (en) * | 1974-03-30 | 1975-10-15 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54100174A (en) | 1979-08-07 |
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