JPS6331287Y2 - - Google Patents
Info
- Publication number
- JPS6331287Y2 JPS6331287Y2 JP1983137939U JP13793983U JPS6331287Y2 JP S6331287 Y2 JPS6331287 Y2 JP S6331287Y2 JP 1983137939 U JP1983137939 U JP 1983137939U JP 13793983 U JP13793983 U JP 13793983U JP S6331287 Y2 JPS6331287 Y2 JP S6331287Y2
- Authority
- JP
- Japan
- Prior art keywords
- light
- auxiliary
- reflector
- reflected
- directly below
- 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
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000004313 glare Effects 0.000 description 1
Landscapes
- Optical Elements Other Than Lenses (AREA)
Description
【考案の詳細な説明】
〔技術分野〕
この考案は遠距離を照らす投光器等に適用され
る照明器具に関するものである。[Detailed Description of the Invention] [Technical Field] This invention relates to a lighting fixture that is applied to a floodlight or the like that illuminates a long distance.
従来、投光器においては、第１図に示すよう
に、放物面の反射板１を用い、その焦点にランプ
２を設けている。３は透明の前面カバーである。
反射板１による反射光は平行光となり、器具直下
方向（対称軸Ｘの方向）に高い光度値が得られ
る。しかし、角AOBの範囲のランプ光は、器具
直下方向に有効に利用されることなく放射状に散
乱するという欠点がある。また、この散乱光が周
辺に害を与えることがある。
Conventionally, in a projector, a parabolic reflector 1 is used, and a lamp 2 is provided at the focal point of the reflector, as shown in FIG. 3 is a transparent front cover.
The light reflected by the reflection plate 1 becomes parallel light, and a high luminous intensity value is obtained in the direction directly below the instrument (in the direction of the axis of symmetry X). However, there is a drawback that the lamp light within the angle AOB is not effectively utilized in the direction directly below the fixture and is scattered radially. Additionally, this scattered light may harm the surrounding area.
第２図のように、中心部に補助反射板４を追加
したものもある。補助反射板４に当つた光は再び
ランプ２の中心Ｏを通つてさらに反射板１へ向
い、そこで反射されてＸ軸に平行な光線となり、
器具直下方向（Ｘ軸方向）への光となる。しか
し、今まで有効にＸ軸方向に向つていた反射板１
のａ〜ｂの範囲の光が補助反射板４によつて阻止
されることになり、器具直下方向の光の増加にな
り難い。 As shown in FIG. 2, there is also one in which an auxiliary reflector 4 is added to the center. The light that hits the auxiliary reflector 4 passes through the center O of the lamp 2 again and further heads towards the reflector 1, where it is reflected and becomes a ray parallel to the X axis.
The light is directed directly below the instrument (in the X-axis direction). However, until now the reflector 1 has been effectively facing the X-axis direction.
Since the light in the range a to b is blocked by the auxiliary reflector 4, it is difficult to increase the amount of light directly below the appliance.
他の従来例として、第３図のように、対称軸Ｘ
に平行な板状のルーバ５を設け、周辺への光漏れ
によるまぶしさ等の害を防止したものが提案され
ている。しかし、直下方向の光を増すことには何
等役立たず、直下方向の光をむしろ低下させるこ
とになる。 As another conventional example, as shown in FIG.
It has been proposed that a parallel plate-shaped louver 5 is provided to prevent damage such as glare caused by light leakage to the surrounding area. However, this does not help in any way to increase the light directly below, but rather reduces the light directly below.
この考案は、周辺への光漏れを阻止して直下方
向の光度の増大を図ることのできる照明器具を提
供することを目的とする。
The object of this invention is to provide a lighting fixture that can prevent light leakage to the surrounding area and increase luminous intensity directly below.
この考案の一実施例を第４図に示す。図におい
て、６は樋状に形成された放物面の反射板であ
り、その焦点にランプ７が設けられ、口部は透明
の前面カバー８で閉蓋されている。反射板６内に
は対称軸Ｘの上下に離れた位置に対称軸Ｘの方向
に沿つて並んだ２列の補助反射板L1〜L3，L1′〜
L3′の列が設けられている。各補助反射板L1〜
L3，L1′〜L3′はランプ７の中心Ｏに向つてラン
プ７の光を反射する向きに設けられている。 An embodiment of this invention is shown in FIG. In the figure, reference numeral 6 denotes a parabolic reflecting plate formed in the shape of a gutter, a lamp 7 is provided at its focal point, and the opening is closed with a transparent front cover 8. Inside the reflector 6, there are two rows of auxiliary reflectors L 1 to L 3 , L 1 ' to which are arranged along the direction of the symmetry axis X at positions above and below the symmetry axis X.
L 3 ' columns are provided. Each auxiliary reflector L 1 ~
L 3 , L 1 ′ to L 3 ′ are provided in a direction to reflect the light from the lamp 7 toward the center O of the lamp 7.
補助反射板L1〜L3は、対称軸Ｘから適当に選
んだ距離y1だけ離れた直線Ｙ＝y1と、直線OAと
の交点Ｃから始まる半径OCの円弧であり、終点
は対称軸Ｘから距離y2だけ離れた直線Ｙ＝y2との
交点Ｄである。同様に、補助反射板L2は直線OD
とＹ＝y1との交点Ｅを始点とし、直線Ｙ＝y2との
交点Ｆを終点とする半径ODの円弧である。補助
反射板L3は、直線OFとＹ＝y1との交点Ｇから直
線Ｙ＝y2との交点Ｈまでの半径OGの円弧である。
他方の列の補助反射板L1′，L2′，L3′はそれぞれ
補助反射板L1，L2，L3と対称のものである。 The auxiliary reflectors L 1 to L 3 are circular arcs with a radius OC that start from the intersection C of the straight line Y = y 1 , which is a distance y 1 appropriately selected from the axis of symmetry X, and the straight line OA, and the end point is the axis of symmetry. This is the intersection point D with a straight line Y=y 2 which is distanced from X by a distance y 2 . Similarly, the auxiliary reflector L 2 is a straight line OD
It is a circular arc with a radius OD that starts at the intersection E with Y=y 1 and ends at the intersection F with the straight line Y=y 2 . The auxiliary reflection plate L3 is a circular arc with a radius OG from the intersection G of the straight line OF and Y= y1 to the intersection H with the straight line Y= y2 .
The auxiliary reflectors L 1 ′, L 2 ′, and L 3 ′ in the other row are symmetrical to the auxiliary reflectors L 1 , L 2 , and L 3 , respectively.
直線Ｙ＝y1，Ｙ＝y2は、線分Y1，Y2をできる
だけ小さく、かつ直射光として角度AOXに出た
光のうちできるだけ多くを補助反射板L1〜L3の
列で反射させて再利用できるように、角度AOH
を大きく、しかも補助反射板L1〜L3，L1′〜L3′
の枚数がむやみに多くならないように適当に選べ
ばよい。 Straight lines Y = y 1 and Y = y 2 make line segments Y 1 and Y 2 as small as possible, and as much of the light that comes out at angle AOX as direct light is reflected by the row of auxiliary reflectors L 1 to L 3 . Angle AOH so you can reuse it
In addition, the auxiliary reflectors L 1 ~ L 3 , L 1 ′ ~ L 3 ′
The number of sheets should be selected appropriately so that the number of sheets does not increase unnecessarily.
このように構成したため、器具直下（対称軸Ｘ
の方向）に向う光は、反射板６によつて反射され
た光の他に、補助反射板L1〜L3，L1′〜L3′の列
によつて反射されてランプ７を通り反射板６で再
反射して対称軸Ｘに平行な光源となるものが追加
される。そのため、直下光度が大幅に高くなる。
補助反射板L1〜L3，L1′〜L3′があることにより、
角度Y1OY2の範囲の光は邪魔されて器具直下方
向へは出て来ないが、補助反射板L1〜L3により
反射される角度AOHは角度Y1OY2より十分大き
くすることが可能である。そのため、補助反射板
L1〜L3や反射板６の反射率を考慮しても、器具
直下光度が極めて高い投光器とすることができ
る。しかも、周辺への光漏れなどの害が減じられ
る。すなわち、望ましい方向にだけ極めて有効に
光を利用することができる照明器具となる。第５
図はこの実施例の予想の光学特性を示す。同図に
おいて、実線はこの実施例を、破線は従来例を示
す。 Because of this configuration, the position directly below the instrument (axis of symmetry
In addition to the light reflected by the reflector 6 , the light heading in the direction of A light source that is re-reflected by the reflector 6 and becomes parallel to the symmetry axis X is added. Therefore, the direct luminosity becomes significantly higher.
Due to the presence of the auxiliary reflectors L 1 to L 3 and L 1 ′ to L 3 ′,
Although the light in the range of angle Y 1 OY 2 is obstructed and does not come out directly below the fixture, the angle AOH reflected by the auxiliary reflectors L 1 to L 3 can be made sufficiently larger than the angle Y 1 OY 2 . It is possible. Therefore, the auxiliary reflector
Even if the reflectance of L 1 to L 3 and the reflector 6 are considered, the projector can have an extremely high luminous intensity directly below the fixture. Furthermore, harm such as light leakage to the surrounding area is reduced. In other words, it becomes a lighting fixture that can extremely effectively utilize light only in a desired direction. Fifth
The figure shows the expected optical properties of this example. In the figure, solid lines indicate this embodiment, and broken lines indicate the conventional example.
なお、上方への光漏れのみが問題となるときは
下列の補助反射板L1′〜L3′を省いてもよい。ま
た、上下の列の補助反射板L1〜L3，L1′〜L3′は
必ずしも対称に設ける必要がなく、さらに補助反
射板L1〜L3，L1′〜L3′の枚数も、製造性等を配
慮して適当に選べばよい。１枚の補助反射板L1
を設けただけでも、直下方向の光として利用して
いる範囲は反射板６の仮想延長部分の長さPA′に
相当しており、器具の小型化を図つて直下照度を
増すことができる。さらに、反射板６は樋状のも
のに限らず、回転放物面のものとしても、同様の
効果が得られる。 Note that when only upward light leakage is a problem, the auxiliary reflecting plates L 1 ′ to L 3 ′ in the lower row may be omitted. Furthermore, the auxiliary reflectors L 1 to L 3 , L 1 ′ to L 3 ′ in the upper and lower rows do not necessarily have to be provided symmetrically, and the number of auxiliary reflectors L 1 to L 3 , L 1 ′ to L 3 ′ does not necessarily have to be symmetrical. may be selected appropriately taking into consideration manufacturability and the like. 1 auxiliary reflector L 1
Even by simply providing the light, the area used for direct light corresponds to the length PA' of the imaginary extension of the reflector plate 6, and it is possible to downsize the device and increase the direct illuminance. Furthermore, the reflecting plate 6 is not limited to a gutter-shaped one, and the same effect can be obtained even if it is a paraboloid of revolution.
第６図は他の実施例を示す。この例は、補助反
射板L1〜L3，L1′〜L3′の列を、対称軸Ｘに平行
な直線でランプ７の外管の接線となる線に沿つて
配列したものである。ランプ７の外管７ａの接線
付近を通る反射光（平行光線）は、外管７ａによ
りほぼ全反射され、透過し難い。そのため、補助
反射板L1〜L3，L1′〜L3′による遮光の影響が少
なくてすむ。 FIG. 6 shows another embodiment. In this example, rows of auxiliary reflectors L 1 to L 3 and L 1 ′ to L 3 ′ are arranged along a straight line parallel to the axis of symmetry X and tangent to the outer bulb of the lamp 7. . Reflected light (parallel light rays) passing near the tangent to the outer tube 7a of the lamp 7 is almost completely reflected by the outer tube 7a and is difficult to pass through. Therefore, the influence of light shielding by the auxiliary reflecting plates L 1 to L 3 and L 1 ′ to L 3 ′ can be reduced.
この考案の照明器具は、反射板で反射する光の
方向に略沿つて複数枚の補助反射板を配列し、こ
れら各補助反射板は、前記光源の直接光を光源側
へ反射するものとしているため、周辺へ漏れよう
とする光が補助反射板で反射し、反射板で直下方
向に再度反射する。そのため直下方向の光度が増
大する。この場合に、複数枚の補助反射板を設
け、これら補助反射板を反射板で反射する光の方
向に略沿つて配列しているため、補助反射板によ
る反射面積を大きく取りながら補助反射板で反射
板からの反射光を遮断する面積が小さくなる。そ
のため、周辺への直接光の漏れを阻止して光源側
へ反射する効果が強く、しかも直下方向へ進む光
の遮断を最小にし、直下方向への光度の増大を充
分に図ることができるという効果がある。
In the lighting equipment of this invention, a plurality of auxiliary reflectors are arranged approximately along the direction of light reflected by the reflector, and each of these auxiliary reflectors reflects the direct light from the light source toward the light source. Therefore, the light that is about to leak to the surrounding area is reflected by the auxiliary reflector, and then reflected again by the reflector in the direction directly below. Therefore, the luminous intensity directly below increases. In this case, multiple auxiliary reflectors are provided, and these auxiliary reflectors are arranged approximately along the direction of the light reflected by the reflectors, so that the auxiliary reflectors can achieve a large reflection area while still allowing the auxiliary reflectors to The area that blocks reflected light from the reflector becomes smaller. Therefore, it has a strong effect of blocking direct light from leaking to the surrounding area and reflecting it toward the light source, and also has the effect of minimizing the blockage of light traveling directly below and sufficiently increasing the luminous intensity in the direction directly below. There is.
第１図ないし第３図はそれぞれ従来例の作用説
明図、第４図はこの考案の一実施例の断面図、第
５図はその光学特性図、第６図は他の実施例の断
面図である。
６……反射板、７……ランプ、８……前面カバ
ー、L1〜L3，L1′〜L3′……補助反射板。
Figures 1 to 3 are explanatory diagrams of the operation of the conventional example, Figure 4 is a sectional view of one embodiment of this invention, Figure 5 is a diagram of its optical characteristics, and Figure 6 is a sectional view of another embodiment. It is. 6...Reflector, 7...Lamp, 8...Front cover, L1 to L3 , L1 ' to L3 '...Auxiliary reflector.
Claims (1)
源から前記反射板で反射する光の方向に略沿つて
複数枚の補助反射板を配列し、これら各補助反射
板は、前記光源の直接光を光源側へ反射するもの
とした照明器具。 A light source is provided at the focal point of a substantially parabolic reflecting plate, and a plurality of auxiliary reflecting plates are arranged approximately along the direction of light reflected from the light source by the reflecting plate, and each of these auxiliary reflecting plates A lighting fixture that reflects direct light toward the light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13793983U JPS6046603U (en) | 1983-09-05 | 1983-09-05 | lighting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13793983U JPS6046603U (en) | 1983-09-05 | 1983-09-05 | lighting equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6046603U JPS6046603U (en) | 1985-04-02 |
| JPS6331287Y2 true JPS6331287Y2 (en) | 1988-08-22 |
Family
ID=30309662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13793983U Granted JPS6046603U (en) | 1983-09-05 | 1983-09-05 | lighting equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6046603U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4678441B2 (en) * | 2009-02-18 | 2011-04-27 | セイコーエプソン株式会社 | Light source device and projector |
| JP2011100160A (en) * | 2011-01-27 | 2011-05-19 | Seiko Epson Corp | Light source device and projector |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54114488U (en) * | 1978-01-31 | 1979-08-11 |
-
1983
- 1983-09-05 JP JP13793983U patent/JPS6046603U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6046603U (en) | 1985-04-02 |
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