JPH0689352A - Perpendicular surface illuminance calculator - Google Patents
Perpendicular surface illuminance calculatorInfo
- Publication number
- JPH0689352A JPH0689352A JP12885091A JP12885091A JPH0689352A JP H0689352 A JPH0689352 A JP H0689352A JP 12885091 A JP12885091 A JP 12885091A JP 12885091 A JP12885091 A JP 12885091A JP H0689352 A JPH0689352 A JP H0689352A
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- arc
- logarithmic scale
- height
- illuminance
- Prior art date
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は店舗などの照明設計にお
ける、スポットライトなどによる鉛直面照度の計算ない
しは所要軸光度の計算などを行なうための計算器に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a calculator for calculating vertical illuminance by a spotlight or the like, or calculating required axial luminosity in lighting design for stores and the like.
【０００２】[0002]
【従来の技術】従来スポットライトなどの鉛直面照度は
一般に下記のθを求め、下記基本式により計算される。
被照射ポイントに対して高さＨ、水平距離Ｘの点より、
軸光度Ｉの光源で該被照射ポイントを照射したときの鉛
直面照度Ｅは… Ｅ＝Ｉ×ＣＯＳ２θ×Ｓｉｎθ／Ｈ２ ただし、 θ＝ｔａｎ−１（Ｘ／Ｈ） ときには、鉛直面照度Ｅを得るに必要な軸光度Ｉを逆に
求めることもあるが、この場合にも、上記基本式はそれ
を変形して利用される。2. Description of the Related Art Conventionally, the vertical surface illuminance of a spotlight or the like is calculated by the following basic equation by obtaining the following θ.
From the point of height H and horizontal distance X to the irradiated point,
The vertical surface illuminance E when illuminating the irradiation target point with a light source having an axial luminous intensity I is E = I × COS 2 θ × Sin θ / H 2 , where θ = tan −1 (X / H) The axial luminous intensity I required to obtain E may be obtained in reverse, but in this case, the above basic formula is also used by modifying it.
【０００３】[0003]
【発明が解決しようとする課題】しかし、照明に関する
知識に乏しい者には計算が難しく、関数表や関数機能付
電卓などがないと事実上は計算できないものである。ま
た、θはいわゆる鉛直角に相当するが、このθの測定も
煩わしい。本発明は照明に関する知識に乏しい者でも、
高価な関数機能付電卓などを使用しなくとも、簡便にス
ポットライトによる鉛直面照度Ｅや、望まれる鉛直面照
度Ｅを得るための所要軸光度Ｉを計算できるようにする
ことにある。However, it is difficult for a person who has little knowledge about lighting to perform calculation, and it is practically impossible to calculate without a function table or a calculator with a function function. Further, although θ corresponds to a so-called vertical angle, the measurement of θ is troublesome. Even if the present invention has little knowledge about lighting,
It is possible to easily calculate the vertical illuminance E by the spotlight and the required axial luminous intensity I for obtaining the desired vertical illuminance E without using an expensive calculator with a function function.
【０００４】[0004]
【課題を解決するための手段】上記目的を達成するため
に、単純な構成で安価な鉛直面照度用の計算器を使用す
る。この計算器は被照射ポイントに対して高さＨ、水平
距離Ｘの点より、軸光度Ｉの光源で該被照射ポイントを
照射した状況下での該被照射ポイントの鉛直面照度Ｅを
計算するためのものである。それは次のように構成され
る。同一中心軸回りに相互に回転する第１円盤と第２円
盤を備える。高さＨの関数Ｈ２の対数目盛を第１円盤の
円弧上に配置する。これに対応する軸光度Ｉの対数目盛
を第２円盤の円弧上に配置する。水平距離Ｘと高さＨの
比ｍ（ｍ＝Ｘ／Ｈ）の関数ｍ×（ｍ２＋１）−３／２の
対数目盛を第１、第２のいずれか一方の円盤の円弧上に
配置する。これに対応する鉛直面照度Ｅの対数目盛を他
方の円盤の円弧上に配置する。本発明計算器においては
２対計４種の対数目盛が登場するが、それらの対応関係
ないしは配置を変更することが許される。また、回転形
の計算器を改め、いわゆるスライド形のものとすること
も可能である。To achieve the above object, a calculator for vertical illuminance which is simple and inexpensive is used. This calculator calculates the vertical illuminance E of the illuminated point under the condition that the illuminated point is illuminated by the light source with the axial luminous intensity I from the point of height H and horizontal distance X with respect to the illuminated point. It is for. It is structured as follows. A first disk and a second disk that rotate relative to each other about the same central axis are provided. A logarithmic scale of the function H 2 of the height H is arranged on the circular arc of the first disk. The corresponding logarithmic scale of the axial luminous intensity I is arranged on the arc of the second disk. A logarithmic scale of a function m × (m 2 +1) −3/2 of the ratio m (m = X / H) of the horizontal distance X and the height H is arranged on the arc of one of the first and second disks. To do. The corresponding logarithmic scale of the vertical illuminance E is arranged on the arc of the other disk. In the calculator of the present invention, four logarithmic scales of two pairs in total appear, but it is allowed to change the corresponding relationship or arrangement. It is also possible to replace the rotary calculator with a so-called slide type calculator.
【０００５】[0005]
【作用】本発明計算器の使用に先立ち、被照射ポイント
と光源との間の高さＨ、水平距離Ｘを測定する。また、
水平距離Ｘと高さＨの比ｍ＝Ｘ／Ｈを予め計算する。ま
た、光軸度Ｉを求めておく。以上のＩ、Ｈ、ｍをもと
に、本発明計算器を操作し、鉛直面照度Ｅを計算する。
すでに説明したように… θ＝ｔａｎ−１（Ｘ／Ｈ）＝ｔａｎ−１ｍ であるので、これを前記基本式に代入し、整理すると次
のようになる。 Ｅ＝Ｉ×ｍ（ｍ２＋１）−３／２／Ｈ２ したがって、例えば軸光度Ｉに関する対数目盛と高さＨ
に関する対数目盛をそれぞれ所要の値に一致させ、残る
比ｍに関する対数目盛から、これに対応する鉛直面照度
Ｅを見い出せば、答が得られる。Before using the calculator of the present invention, the height H and the horizontal distance X between the illuminated point and the light source are measured. Also,
A ratio m = X / H of the horizontal distance X and the height H is calculated in advance. Further, the optical axis degree I is obtained. Based on the above I, H, and m, the calculator of the present invention is operated to calculate the vertical surface illuminance E.
As already described, since θ = tan −1 (X / H) = tan −1 m, this is substituted into the above basic formula and arranged as follows. E = I × m (m 2 +1) −3/2 / H 2 Therefore, for example, a logarithmic scale with respect to the axial luminous intensity I and a height H
An answer can be obtained by matching the logarithmic scales for the respective values to the required values and finding the vertical illuminance E corresponding thereto from the logarithmic scales for the remaining ratio m.
【０００６】[0006]
【実施例】以下、本発明の一実施例を図１〜図３により
説明する。本実施例は第１円盤１と第２円盤２とを互い
に係止し、かつ同一中心軸回りに相互に回転できるよう
にハトメ３で繁いだものである。本実施例では第１円盤
１が大径、第２円盤２が小径であり、第１円盤１はより
大きな方形厚紙１′上に表示されたものである。また第
２円盤２の素材は透明である。第１円盤１の上側には円
弧上に配置された高さＨの２乗を示す目盛１ａがあり、
２倍の高さで３０°の角度となるような対数目盛となっ
ている。またその下側の円弧上には照度Ｅを示す目盛１
ｂがある。これは２倍の照度で１５°の角度となるよう
な対数目盛であって、その１０００ｌｘの点が、高さＨ
＝１ｍの点と１８０°の位置になるよう配置している。
一方、第２円盤２の上側には円弧上に配置された軸光度
Ｉを示す目盛２ａがあり、２倍の光度で１５°の角度と
なるような対数目盛となっている。また軸光度Ｉ＝１０
００の点から１８０°隔れたその下側の円弧上にはＩ／
Ｈ２で求められる高さＨのときの直下水平面照度Ｅ０を
示すための矢印２ｄが表示され、この左側には水平距離
Ｘと高さＨの比ｍ＝Ｘ／Ｈより鉛直面照度Ｅを求めるた
めの目盛２ｂが円弧状に表示されている。目盛２ｂの目
盛は比ｍの関数ｍ（ｍ２＋１）−３／２を対数で示した
ものであって、その関数が２倍となったときに位相が１
５°進む。さらに、第２円盤２の空白部に光源と被照射
ポイントの位置関係を示す側面図２Ｃを表示することに
より、本計算器をよりわかり易く使用できるよう配慮し
ている。次に本計算器の使用例を説明する。図３は光源
の軸光度Ｉと光源に対する被照射点との位置関係が既知
で、被照射点の鉛直面照度Ｅを求めるときの手順を示し
ている。ここでは高さＨ＝２ｍ、水平距離Ｘ＝１ｍ、光
源の軸光度Ｉ＝５０００ｃｄとしたときの被照射点の鉛
直面照度Ｅを求めている。手順は第１円盤１の高さＨ
の目盛の２．０と、第２円盤２の軸光度Ｉの目盛の５０
００を合わせる。ここでＸ／Ｈの比は０．５なので、
第２円盤２のＸ／Ｈ＝０．５と交わる第１円盤１の照度
Ｅを読みとる。ここでは４２０ｌｘとなり以上の手順に
より、鉛直面照度Ｅ≒４２０ｌｘを得ることができる。
図４は光源と被照射点の位置関係と、所要照度Ｅが与え
られたときに、これを満足するための光源の軸光度Ｉを
求める手順を例示したものである。ここでは高さＨ＝１
ｍ、水平距離Ｘ＝０．７ｍの状況下で鉛直面照度Ｅ＝２
０００ｌｘとするに必要な光源の軸光度Ｉを求めてい
る。手順は第１円盤１の照度Ｅ＝２０００ｌｘと、第
２円盤２のＸ／Ｈ＝０．７が交わるように円盤どうしを
回転させる。このとき、第１円盤１のＨ＝１ｍに交わ
る軸光度Ｉを読みとる。ここでは５３００ｃｄとなり、
所要軸光度Ｉ≒５３００ｃｄを求めることができる。図
３における正解照度Ｅは… Ｅ＝Ｉ・ＣＯＳ２θ・Ｓｉｎθ／Ｈ２ ＝５０００×ＣＯＳ２４５°×Ｓｉｎ４５°／２２ ＝４４２（ｌｘ） 図４における正解軸光度Ｉは… θ＝ｔａｎ−１（Ｘ／Ｈ）＝ｔａｎ−１（０．７）≒３
５° Ｉ＝Ｅ・Ｈ２／ＣＯＳ２θ・Ｓｉｎθ ＝２０００／ＣＯＳ２３５゜・Ｓｉｎ３５゜ ≒５２００ｃｄ となり、それぞれ±５％程度の精度で計算ができること
になる。この精度はスポットライト器具の軸光度の精度
や本計算器の用途等から考えても充分なものであるとい
える。本実施例によれば単純な構造、簡単な手順により
鉛直面照度や軸光度を実使用上充分な精度で求めること
ができる。本実施例においては、高さＨに関する目盛１
ａと、軸光度Ｉに関する目盛２ａが対応する。残り鉛直
面照度Ｅに関する目盛１ｂと比ｍに関する目盛２ｂが対
応する。このように、２対計４種の対数目盛が登場する
が、たとえば高さＨに関する目盛と対応する目盛は残り
の三種のうちのいずれでもよい。しかして、高さＨに関
する目盛と対応しない残りの２種の目盛は相互に対応す
るように選ばれる。たとえば、高さＨと比ｍに関する両
目盛を対応させ、残りの鉛直面照度Ｅと軸光度Ｉに関す
る両目盛を対応させることが可能であって、これにより
前記実施例のものとは異なる同効の計算器を得ることが
可能である。前記実施例は回転形のものである。この点
を改め、互いに平行移動が可能な一対のスライド板を含
むスライド形のものとすることも可能である。この場合
は２対４種の目盛を各スライド板にその移動方向に沿っ
て配置する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In this embodiment, the first disc 1 and the second disc 2 are engaged with each other, and the eyelets 3 are used so that they can rotate about the same central axis. In this embodiment, the first disc 1 has a large diameter and the second disc 2 has a small diameter, and the first disc 1 is displayed on a larger rectangular cardboard 1 '. The material of the second disk 2 is transparent. On the upper side of the first disc 1, there is a scale 1a arranged on an arc and showing the square of the height H,
It has a logarithmic scale that doubles the height and makes an angle of 30 °. Also, a scale 1 indicating the illuminance E is provided on the lower arc.
There is b. This is a logarithmic scale with an illuminance of 2 times and an angle of 15 °, and the point of 1000 l x is the height H.
= 1m point and 180 ° position.
On the other hand, on the upper side of the second disk 2, there is a scale 2a arranged on a circular arc and showing the axial luminous intensity I, which is a logarithmic scale so that an angle of 15 ° is obtained at twice the luminous intensity. The axial luminous intensity I = 10
I / on the lower arc 180 ° apart from point 00
An arrow 2d is displayed to indicate the horizontal plane illuminance E 0 immediately below when the height H is obtained by H 2 , and the vertical plane illuminance E is calculated from the ratio m = X / H of the horizontal distance X and the height H on the left side of this. The scale 2b for obtaining is displayed in an arc shape. The scale of the scale 2b is a function m (m 2 +1) −3/2 of the ratio m expressed in logarithm, and when the function is doubled, the phase is 1
Go 5 °. Furthermore, by displaying a side view 2C showing the positional relationship between the light source and the irradiated point on the blank portion of the second disk 2, consideration is given to making the present calculator easier to use. Next, an example of using this calculator will be described. FIG. 3 shows a procedure for obtaining the vertical illuminance E of the illuminated point, where the positional relationship between the axial luminous intensity I of the light source and the illuminated point with respect to the light source is known. Here, the vertical plane illuminance E of the illuminated point is calculated when the height H = 2 m, the horizontal distance X = 1 m, and the axial luminous intensity I = 5000 cd of the light source. The procedure is the height H of the first disc 1.
Of the scale of 2.0 and the scale of the axial luminous intensity I of the second disc 2 of 50
Match 00. Since the ratio of X / H is 0.5,
The illuminance E of the first disk 1 that intersects X / H = 0.5 of the second disk 2 is read. Here, it is 420 l x, and the vertical illuminance E≈420 l x can be obtained by the above procedure.
FIG. 4 illustrates the positional relationship between the light source and the irradiation point and the procedure for obtaining the axial luminous intensity I of the light source to satisfy the required illuminance E when given. Height H = 1 here
m, horizontal distance X = 0.7 m, vertical illuminance E = 2
The axial luminous intensity I of the light source required to obtain 000 l x is obtained. The procedure is to rotate the disks so that the illuminance E of the first disk 1 = 2000 l x and the X / H of the second disk 2 = 0.7 intersect. At this time, the axial luminous intensity I at which H = 1 m of the first disk 1 intersects is read. Here it is 5300 cd,
The required axial luminous intensity I≈5300 cd can be obtained. The correct illuminance E in FIG. 3 is ... E = I · COS 2 θ · Sin θ / H 2 = 5000 × COS 2 45 ° × Sin 45 ° / 2 2 = 442 (l x ) tan −1 (X / H) = tan −1 (0.7) ≈3
5 ° I = E · H 2 / COS 2 θ · Sin θ = 2000 / COS 2 35 ° · Sin 35 ° ≈5200 cd, and calculation can be performed with an accuracy of about ± 5%. It can be said that this accuracy is sufficient considering the accuracy of the axial luminosity of the spotlight fixture and the application of this calculator. According to the present embodiment, the vertical plane illuminance and axial luminous intensity can be obtained with sufficient accuracy in actual use with a simple structure and simple procedure. In this embodiment, the scale 1 for the height H
a corresponds to the scale 2a regarding the axial luminous intensity I. The scale 1b for the remaining vertical illuminance E corresponds to the scale 2b for the ratio m. In this way, two logarithmic scales in total of four types appear, but for example, the scale corresponding to the height H may be any of the remaining three types. Thus, the other two scales which do not correspond to the scale for height H are chosen to correspond to each other. For example, it is possible to correspond both scales relating to the height H and the ratio m, and to correspond both scales relating to the remaining vertical surface illuminance E and the axial luminous intensity I, which has the same effect as that of the above embodiment. It is possible to obtain a calculator of The embodiment described above is of the rotary type. It is also possible to change this point and make it a slide type including a pair of slide plates that can move in parallel with each other. In this case, graduations of 2 to 4 types are arranged on each slide plate along its moving direction.
【０００７】[0007]
【発明の効果】本発明によれば、高価な関数機能付電卓
や、三角関数表などを使用した面倒な手計算を行なわず
に、簡単な手順で実用上充分な精度で鉛直面照度や軸光
度を求めることができる。このため、照明に関する知識
の乏しい者でも照明設計やスポットライト器具の選定が
行なえるなどの効果がある。また、単純な構造で安価に
製作できる。さらに簡単な手順であるため計算時間は関
数機能付電卓を使用したときの３分の１以下で求めるこ
とができ、パーソナルコンピュータに数式をプログラム
して計算させるのと同等のスピードといえる程の効果が
ある。According to the present invention, the vertical plane illuminance and the axis of illuminance and the axis can be practically achieved with a simple procedure without performing a troublesome manual calculation using an expensive calculator with a function function or a trigonometric table. The luminosity can be calculated. Therefore, even a person with little knowledge about lighting can design lighting and select spotlight fixtures. Further, it can be manufactured at a low cost with a simple structure. Since it is a simpler procedure, the calculation time can be obtained in less than one-third of the time when using a calculator with a function function, and the effect is comparable to the speed equivalent to programming a mathematical formula on a personal computer. There is.
【図１】本発明に係る鉛直面照度計算器の分解斜視図FIG. 1 is an exploded perspective view of a vertical illuminance calculator according to the present invention.
【図２】上記計算器の分解平面図FIG. 2 is an exploded plan view of the above calculator
【図３】上記計算器の他の使用手順を示す説明図FIG. 3 is an explanatory diagram showing another procedure of using the calculator.
【図４】上記計算器の他の使用手順を示す説明図FIG. 4 is an explanatory diagram showing another procedure of using the calculator.
１ 第１円盤 １ａ 高さＨの目盛 １ｂ 照度Ｅの目盛 ２ 第２円盤 ２ａ 軸光度Ｉの目盛 ２ｂ 水平距離Ｘと高さＨに関係する目盛 ２ｃ 光源と被照射点の位置関係を示す図示 ２ｄ 直下照度を指示する矢印 ３ ハトメ 1 1st disk 1a Scale of height H 1b Scale of illuminance E 2 2nd disk 2a Scale of axis luminous intensity I 2b Scale 2c related to horizontal distance X and height H 2c Illustrated 2d showing the positional relationship between the light source and irradiated point Arrow indicating the illuminance directly underneath 3 Eyelet
Claims (4)
離Ｘの点より、軸光度Ｉの光源で該被照射ポイントを照
射した状況下での該被照射ポイントの鉛直面照度Ｅを計
算するためのものであって、 同一中心軸回りに相互に回転する第１円盤と第２円盤を
備え、高さＨの関数Ｈ２の対数目盛を第１円盤の円弧上
に配置し、これに対応する軸光度Ｉの対数目盛を第２円
盤の円弧上に配置し、水平距離Ｘと高さＨの比ｍの関数
ｍ×（ｍ２＋１）−３／２の対数目盛を第１、第２のい
ずれか一方の円盤の円弧上に配置し、これに対応する鉛
直面照度Ｅの対数目盛を他方の円盤の円弧上に配置した
ことを特徴とする鉛直面照度計算器。1. A vertical plane illuminance E of an illuminated point under the condition that the illuminated point is illuminated by a light source having an axial luminous intensity I from a point of height H and horizontal distance X with respect to the illuminated point. In order to do this, the first disk and the second disk that rotate about the same central axis are provided, and the logarithmic scale of the function H 2 of the height H is arranged on the arc of the first disk. The corresponding logarithmic scale of the axial luminous intensity I is arranged on the circular arc of the second disk, and the logarithmic scale of the function m × (m 2 +1) −3/2 of the ratio m of the horizontal distance X and the height H is first and second. 2. A vertical plane illuminance calculator characterized in that it is arranged on the circular arc of one of the disks, and the logarithmic scale of the vertical illuminance E corresponding to this is arranged on the circular arc of the other disk.
離Ｘの点より、軸光度Ｉの光源で該被照射ポイントを照
射した状況下での該被照射ポイントの鉛直面照度Ｅを計
算するためのものであって、 同一中心軸回りに相互に回転する第１円盤と第２円盤を
備え、高さＨの関数Ｈ２の対数目盛を第１円盤の円弧上
に配置し、これに対応する対数目盛であって、水平距離
Ｘと高さＨの比ｍの関数ｍ×（ｍ２＋１）−３／２の対
数目盛を第２円盤の円弧上に配置し、軸光度Ｉの対数目
盛を第１、第２のいずれか一方の円盤の円弧上に配置
し、これに対応する鉛直面照度Ｅの対数目盛を他方の円
盤の円弧上に配置したことを特徴とする鉛直面照度計算
器。2. The vertical surface illuminance E of the illuminated point under the situation where the illuminated point is illuminated by a light source having an axial luminous intensity I from the point of height H and horizontal distance X with respect to the illuminated point. In order to do this, the first disk and the second disk that rotate about the same central axis are provided, and the logarithmic scale of the function H 2 of the height H is arranged on the arc of the first disk. A corresponding logarithmic scale, which is a function m × (m 2 +1) −3/2 of the ratio m of the horizontal distance X and the height H, is arranged on the arc of the second disk, and the logarithm of the axial luminous intensity I. Vertical plane illuminance calculation characterized in that a scale is arranged on the arc of one of the first and second discs, and a logarithmic scale of the vertical plane illuminance E corresponding to this is placed on the arc of the other disc. vessel.
離Ｘの点より、軸光度Ｉの光源で該被照射ポイントを照
射した状況下での該被照射ポイントの鉛直面照度Ｅを計
算するためのものであって、 同一中心軸回りに相互に回転する第１円盤と第２円盤を
備え、高さＨの関数Ｈ２の対数目盛を第１円盤の円弧上
に配置し、これに対応する鉛直面照度Ｅの対数目盛を第
２円盤の円弧上に配置し、水平距離Ｘと高さＨの比ｍの
関数ｍ×（ｍ２＋１）−３／２の対数目盛を第１、第２
のいずれか一方の円盤の円弧上に配置し、これに対応す
る軸光度Ｉの対数目盛を他方の円盤の円弧上に配置した
ことを特徴とする鉛直面照度計算器。3. The vertical illuminance E of the illuminated point under the condition where the illuminated point is illuminated by a light source having an axial luminous intensity I from the point of height H and horizontal distance X with respect to the illuminated point. In order to do this, the first disk and the second disk that rotate about the same central axis are provided, and the logarithmic scale of the function H 2 of the height H is arranged on the arc of the first disk. The corresponding logarithmic scale of the vertical illuminance E is arranged on the arc of the second disk, and the logarithmic scale of the function m × (m 2 +1) −3/2 of the ratio m of the horizontal distance X and the height H is first, Second
A vertical plane illuminance calculator characterized in that the logarithmic scale of the axial luminous intensity I corresponding to this is arranged on the arc of one of the disks, and the corresponding logarithmic scale is arranged on the arc of the other disk.
て、第１、第２の円盤を互いに平行移動する第１、第２
のスライド板に改め、各対数目盛をそれぞれのスライド
板に上記移動方向に沿って設けたことを特徴とする鉛直
面照度計算器。4. The first and second parallel translation devices according to claim 1, wherein the first and second discs are moved in parallel with each other.
The vertical plane illuminance calculator, characterized in that each of the logarithmic scales is provided on each slide plate along the moving direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12885091A JPH0689352A (en) | 1991-03-15 | 1991-03-15 | Perpendicular surface illuminance calculator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12885091A JPH0689352A (en) | 1991-03-15 | 1991-03-15 | Perpendicular surface illuminance calculator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0689352A true JPH0689352A (en) | 1994-03-29 |
Family
ID=14994927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12885091A Pending JPH0689352A (en) | 1991-03-15 | 1991-03-15 | Perpendicular surface illuminance calculator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0689352A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4829187A (en) * | 1985-11-11 | 1989-05-09 | Shiseido Company Ltd. | UV-ray sensitive composition and element for measuring UV-ray dose |
-
1991
- 1991-03-15 JP JP12885091A patent/JPH0689352A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4829187A (en) * | 1985-11-11 | 1989-05-09 | Shiseido Company Ltd. | UV-ray sensitive composition and element for measuring UV-ray dose |
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