JPS6222032A - Photodetection part of illuminance meter - Google Patents
Photodetection part of illuminance meterInfo
- Publication number
- JPS6222032A JPS6222032A JP16272585A JP16272585A JPS6222032A JP S6222032 A JPS6222032 A JP S6222032A JP 16272585 A JP16272585 A JP 16272585A JP 16272585 A JP16272585 A JP 16272585A JP S6222032 A JPS6222032 A JP S6222032A
- Authority
- JP
- Japan
- Prior art keywords
- light
- filter
- control filter
- spectral sensitivity
- filters
- 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.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 48
- 230000035945 sensitivity Effects 0.000 claims abstract description 38
- 230000003595 spectral effect Effects 0.000 claims abstract description 35
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000007423 decrease Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000005286 illumination Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/02—Details
- G01J1/04—Optical or mechanical part supplementary adjustable parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/02—Details
- G01J1/04—Optical or mechanical part supplementary adjustable parts
- G01J1/0407—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings
- G01J1/0437—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings using masks, aperture plates, spatial light modulators, spatial filters, e.g. reflective filters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/02—Details
- G01J1/04—Optical or mechanical part supplementary adjustable parts
- G01J1/0407—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings
- G01J1/0448—Adjustable, e.g. focussing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/02—Details
- G01J1/04—Optical or mechanical part supplementary adjustable parts
- G01J1/0488—Optical or mechanical part supplementary adjustable parts with spectral filtering
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、分光感度特性が標準比視感度に精度よく合致
した照度計の受光部に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a light receiving section of an illuminance meter whose spectral sensitivity characteristics match the standard luminous efficiency with high precision.
従来の技術
照度計がもつべき重要な特性は２つあり、１つは受光部
の受光角特性が余弦則に合致していることと、もう１つ
は、分光感度特性が標準比視感度に合致していることで
ある。このうち゛後者の標準比視感度は第６図のように
表せる。受光部の分光感度が標準比視感度に合致すると
いうことは、受光部に各波長毎の単色光を与えた時の受
光部からの出力が第６図の曲線に沿って変化することを
いう。There are two important characteristics that conventional technology illumination meters should have: one is that the acceptance angle characteristics of the light receiving part match the cosine law, and the other is that the spectral sensitivity characteristics match the standard luminous efficiency. It is consistent. Of these, the standard luminous efficiency of the latter can be expressed as shown in FIG. The fact that the spectral sensitivity of the light receiving section matches the standard luminous efficiency means that the output from the light receiving section changes along the curve in Figure 6 when monochromatic light of each wavelength is applied to the light receiving section. .
従来の照度計の受光部は、通常第７図に示すように、光
電変換素子１の上方に光電変換素子１と同面積またはそ
れより大きな面積を持つ視感度補正フィルタ２を配置す
ることにより、受光部の分光感度を標準比視感度に合致
させるようにしている。しかし、光電変換素子１の分光
感度や視１度補正フィルタ２の分光透過特性は、必ずし
も一定ではなく、製ｎｏットの違いによって変化する。As shown in FIG. 7, the light receiving section of a conventional illumination meter usually has a visibility correction filter 2 arranged above the photoelectric conversion element 1 and having an area equal to or larger than the photoelectric conversion element 1. The spectral sensitivity of the light receiving section is made to match the standard luminous efficiency. However, the spectral sensitivity of the photoelectric conversion element 1 and the spectral transmission characteristics of the 1 degree diopter correction filter 2 are not necessarily constant, and vary depending on the manufacturing notation.
また、同一ロット内においてもバラツキがある。Furthermore, there are variations even within the same lot.
したがって、ある特定の光電変換素子１と？５２ｓ度補
正フィルタ２とを組み合わせた分光感度が、標準比視感
度に合致しても、別の同種の光電変換素子１と視感度補
正フィルタ２とを組み合わせた場合に、その分光感度が
標準比視感度に合致しないことがある。なお、３は照度
計受光部基板、４は光拡散板である。Therefore, with a certain photoelectric conversion element 1? Even if the spectral sensitivity of the combination with the 52s degree correction filter 2 matches the standard luminous efficiency, when another photoelectric conversion element 1 of the same type is combined with the luminous efficiency correction filter 2, the spectral sensitivity will match the standard luminous efficiency. It may not match the visual sensitivity. In addition, 3 is an illuminance meter light receiving part board, and 4 is a light diffusing plate.
そこで、従来は、同一ロットの光電変換素子１や視感度
補正フィルタ２を複数準備し、すべての光電変換素子１
の分光感度や視感度補正フィルタ２の分光透過率を測定
し、その都度組み合わせ番検討することによって、受光
器の分光感度を標準比視感度に合致させていた。Therefore, in the past, a plurality of photoelectric conversion elements 1 and visibility correction filters 2 of the same lot were prepared, and all the photoelectric conversion elements 1
The spectral sensitivity of the light receiver and the spectral transmittance of the luminous sensitivity correction filter 2 are measured, and the combination number is examined each time to match the spectral sensitivity of the light receiver with the standard luminous efficiency.
発明が解決しようとする問題点
このような従来の照度計の受光部では、分光感度の微調
整が困難なために、光電変換素子１や視感度補正フィル
タ２の製造ロフトの違いや、同一ロット内のバラツキの
ために、その受光部の分光感度が標準比視感度に合致し
ない場合もあり、その照度値の信頼性に問題が生じてく
る。Problems to be Solved by the Invention In the light receiving section of such a conventional illumination meter, it is difficult to finely adjust the spectral sensitivity. Due to variations in the luminous intensity, the spectral sensitivity of the light receiving section may not match the standard luminous efficiency, which poses a problem in the reliability of the illuminance value.
本発明は上記従来の問題点を解消するもので、分光ｌ５
ｒｆ１の微調整が可能で、標準比視感度に精度良く合致
させることのできる照度計の受光部を提供することを目
的とする。The present invention solves the above-mentioned conventional problems, and spectroscopic l5
It is an object of the present invention to provide a light receiving section of an illuminance meter that can finely adjust rf1 and match the standard luminous efficiency with high accuracy.
問題点を解決するための手段
上記問題点を解決するため、本発明の照度計の受光部は
、１つの光電変換素子と、この光電変換素子の上方に規
則性を持たせて配置された分光透過特性の異なる３種類
の光学フィルタからなる視感度補正フィルタと、遮光部
と光が通過する開口部とを持ち前記視！ｉ４度補正フィ
ルタの上方に配置された光制御フィルタとを備え、前記
光制御フィルタの軸心回りの回転ならびに軸心方向に沿
う移動により、受光部の分光感度が変化する構成とした
ちのである。Means for Solving the Problems In order to solve the above problems, the light receiving section of the illumination meter of the present invention includes one photoelectric conversion element and a spectrometer arranged regularly above the photoelectric conversion element. It has a visibility correction filter consisting of three types of optical filters with different transmission characteristics, a light shielding part, and an opening through which light passes. A light control filter is provided above the i4 degree correction filter, and the spectral sensitivity of the light receiving section is changed by rotation of the light control filter around the axis and movement along the axis.
作用
上記構成によれば、光制御フィルタによって、視感度補
正フィルタを構成する３種類の光学フィルタの面積比、
および光制御フィルタの遮光部下にある光学フィルタへ
の入射立体角を変えることができ、この結果、受光部の
分光感度の微調整が １可能となり、光電変
換素子の分光感度および視感度補正フィルタの分光透過
特性のバラツキによって生じる受光部の分光感度のバラ
ツキを微細に補正することができる。Effect According to the above configuration, the area ratio of the three types of optical filters constituting the visibility correction filter is determined by the light control filter;
It is also possible to change the solid angle of incidence on the optical filter located below the light shielding part of the light control filter.As a result, it is possible to finely adjust the spectral sensitivity of the light receiving section, and the spectral sensitivity of the photoelectric conversion element and the visibility correction filter can be changed. It is possible to finely correct variations in the spectral sensitivity of the light receiving section caused by variations in the spectral transmission characteristics.
実施例
以下、本発明の一実施例を第１図〜第５図に基づいて説
明する。EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1 to 5.
第１図は本発明の一実施例における照度計の受光部の分
解斜視図で、１１は光制御フィルタ、１２は視感度補正
フィルタ、１３は光電変換素子である。FIG. 1 is an exploded perspective view of a light receiving section of an illuminometer according to an embodiment of the present invention, in which 11 is a light control filter, 12 is a visibility correction filter, and 13 is a photoelectric conversion element.
視感度補正フィルタ１２は、第１図に示すように、３種
類の光学フィルタ１２ａ〜１２ｃを規則性を持たせて配
置している。なお、この実施例では、説明を容易にする
ために、各光学フィルタ１２ａ〜１２ｃの面積を均等に
分割しているが、実際には、光電変換素子丁３と視感度
補正フィルタ１２とを組み合わせた時の分光感度が、標
準比視感度に近似する面積比とする必要がある。また、
光制御フィルタ１１は、光１１ｉ１Ｊｉｌｌフィルタ１
１を時計回りおよび反時計回りに回転させることにより
、光学フィルタ１２ｂからの光量は変化せずに、光学フ
ィルタ１２ａ、 １２ｃからの光量のみ変化するように
、遮光部１１ａと開口部１１ｂとの形状および配列が設
定されている。As shown in FIG. 1, the visibility correction filter 12 includes three types of optical filters 12a to 12c arranged with regularity. In this embodiment, the area of each optical filter 12a to 12c is divided equally for ease of explanation, but in reality, the photoelectric conversion element 3 and the visibility correction filter 12 are combined. It is necessary to set the spectral sensitivity at the time of the change to an area ratio that approximates the standard luminous efficiency. Also,
The light control filter 11 is a light 11i1Jill filter 1.
1 clockwise and counterclockwise, the shapes of the light shielding part 11a and the opening part 11b are changed so that the amount of light from the optical filter 12b does not change, but only the amount of light from the optical filters 12a and 12c changes. and array is set.
第２図は、視感度補正フィルタ１２の光学フィルタ、１
２ａ〜１２Ｃに個別に同等の光を照射した場合の受光部
分光感度を示しており、曲８（ａ）は光学フィルタ１２
ａのみに光を照射した場合、曲線（ｂ）は光学フィルタ
１２ｂのみに光を照射した場合、曲ＩＮ（ｃ）は光学フ
ィルタ１２ｃのみに光を照射した場合の分光感度特性曲
線である。また、曲線（ｄ）は、前記特性曲線の曲線（
ａ）（ｂ）（Ｃ）を加算したものであり、受光部の分光
感度特性を示している。FIG. 2 shows the optical filter 1 of the visibility correction filter 12.
2a to 12C are individually irradiated with the same light, and song 8(a) shows the optical sensitivity of the optical filter 12.
When only the optical filter 12c is irradiated with light, curve (b) is the spectral sensitivity characteristic curve when only the optical filter 12b is irradiated with light, and the curve IN (c) is the spectral sensitivity characteristic curve when only the optical filter 12c is irradiated with light. Moreover, the curve (d) is the curve (
It is the sum of a), (b), and (C), and shows the spectral sensitivity characteristics of the light receiving section.
第３図は上記照度計の受光部の動作原理を示すものであ
り、第３図（Ａ）において、光制御フィルタ１１を矢印
六方向に移動させた場合、光学フィルタｊ２ａの透過光
量が増加するとともに、光学フィルタ１２Ｃの透過光量
が減少し、矢印Ｂ方向に移動させた場合、光学フィルタ
１２ａの透過光量が減少するとともに、光学フィルタ１
２ｃの透過光量が増加する。なお、この時の光学フィル
タ１２ｂの透過光量は変化しない。ただし、上記現象は
、遮光部１１ａ（開孔部１１ｂでも同様）が第３図に示
したような隣接する２つの光学フィルタ１２ａ、 １２
ｃ上にある場合のみであり、移動することによって遮光
部１１ａが次の隣接する光学フィルタ上に位置した場合
には、この現象は生じないことになる。また光制御フィ
ルタ１１を第３図（Ｂ）のように矢印Ｃ方向に移動させ
た場合、光学フィルタ１２ａ、 １２ｃの透過光量が増
加し、矢印り方向に移動させた場合、光学フィルタ１２
ａ、 １２ｃの透過光量が減少する。Figure 3 shows the operating principle of the light receiving section of the illuminance meter, and in Figure 3 (A), when the light control filter 11 is moved in the six directions of the arrows, the amount of light transmitted through the optical filter j2a increases. At the same time, the amount of light transmitted through the optical filter 12C decreases, and when the optical filter 12C is moved in the direction of arrow B, the amount of light transmitted through the optical filter 12a decreases, and the amount of light transmitted through the optical filter 12C decreases.
The amount of transmitted light of 2c increases. Note that the amount of light transmitted through the optical filter 12b at this time does not change. However, the above phenomenon occurs when the light shielding part 11a (the same applies to the aperture part 11b) of two adjacent optical filters 12a and 12 as shown in FIG.
This phenomenon only occurs when the light shielding part 11a is located on the next adjacent optical filter by moving. Furthermore, when the light control filter 11 is moved in the direction of arrow C as shown in FIG. 3(B), the amount of transmitted light through the optical filters 12a and 12c increases;
The amount of transmitted light of a and 12c decreases.
第４図は、光制御フィルタ１１を上下に移動させた時の
光学フィルタ１２ａに入射する光量の変化（光学フィル
タ１２Ｃも同様の変化をする）を示すものである。いま
、光制御フィルタ１１と視感度補正フィルタ１２とを距
離Ａ２の位置に設定したとすると、その時の光制御フィ
ルタ１１の遮光部１１ａと光学フィルタ１２ａとのなす
角度はθ２となり、光制御フィルタ１１の遮光部１１ａ
と光学フィルタ１２ｂとのなす角度はθ５となる。次に
光制御フィルタ１１を矢印Ｃ方向に移動させ、距離Ａ１
に設定した時は、光制御フィルタ１１の遮光部１１ａと
光学フィルタ１２ａとのなす角はθ１となり、光学フィ
ルタ１２ａへの入射光量は増加（光学フィルタ１２ｃも
同様に増加する）し、光制御フィルタ１１の遮光部１１
ａと光学フィルタ１２ｂとのなす角はθ４となり、光学
フィルタ１１ｂへの入射光量は減少する。また光制御フ
ィルタ１１を矢印り方向に移動させ、距離ρ３に設定し
た時は、光制御フィルタ１１の遮光部１１ａと光学フィ
ルタ１２ａとのなす角θ３となり、光学フィルタ１２ａ
への入射光量は減少（光学フィルタ１２ｃも同様に減少
する）し、光制御フィルタ１１の遮光部１１ａと光学フ
ィルタ１２ｂとのなす角はθ６となり、光学フィルタ１
２ｂへの入射光量は増加する。FIG. 4 shows a change in the amount of light incident on the optical filter 12a when the light control filter 11 is moved up and down (the optical filter 12C also undergoes a similar change). Now, if the light control filter 11 and the visibility correction filter 12 are set at a distance A2, then the angle between the light shielding part 11a of the light control filter 11 and the optical filter 12a is θ2, and the angle between the light control filter 11 and the optical filter 12a is θ2. The light shielding part 11a of
The angle formed by the optical filter 12b and the optical filter 12b is θ5. Next, the light control filter 11 is moved in the direction of arrow C, and the distance A1 is
When set to 11 light shielding parts 11
The angle between a and the optical filter 12b becomes θ4, and the amount of light incident on the optical filter 11b decreases. Further, when the light control filter 11 is moved in the direction of the arrow and the distance is set to ρ3, the angle θ3 between the light shielding portion 11a of the light control filter 11 and the optical filter 12a becomes θ3, and the optical filter 12a
The amount of light incident on the optical filter 12c decreases (the optical filter 12c also decreases), and the angle between the light blocking portion 11a of the light control filter 11 and the optical filter 12b becomes θ6, and the optical filter 1
The amount of light incident on 2b increases.
第５図は、光電変換素子１３と視感度補正フィルタ１２
とを組み合わせた場合の分光感度Ｓ（λ）が標準比視感
度Ｖ（λ）からはずれる形態を示したものであり、第５
図（Ａ＞のように標準比視感度■（λ）に比べて短波長
域・長波長域とも感度が 「高い場合と、第５図
（８）のように短波長域・長波長域とも感度が低い場合
と、第５図（Ｃ）のように分光感度Ｓ（λ）が全体的に
短波長域側にシフトしている場合と、第５図（Ｄ）のよ
うに全体的に長波長側にシフトしている場合との４つに
分類することができる。FIG. 5 shows the photoelectric conversion element 13 and the visibility correction filter 12.
This shows the form in which the spectral sensitivity S (λ) deviates from the standard luminous efficiency V (λ) when the 5th
As shown in Figure (A), there are cases where the sensitivity is high in both the short and long wavelength ranges compared to the standard luminous efficiency (λ), and cases where the sensitivity is high in both the short and long wavelength ranges as shown in Figure 5 (8). There are cases in which the sensitivity is low, cases in which the spectral sensitivity S(λ) is entirely shifted toward the shorter wavelength region as shown in Fig. 5(C), and cases in which the spectral sensitivity S(λ) is entirely shifted towards the shorter wavelength region as shown in Fig. 5(D). It can be classified into four types: cases in which the wavelength is shifted to the wavelength side;
次に、受光部の分光感度を標準比視感度に合致させる方
法を第３図および第５図を用いて説明する。受光部の分
光感度が第５図（Ａ＞の形態にある場合は、光学フィル
タ１２ａ、 １２ｃの透過光量を減少させるか、あるい
は、光学フィルタ１２ｂの透過光量を増加させればよい
ことになり、第３図（８）において、光制御フィルタ１
１を矢印り方向に移動させればよく、また第５図（Ｂ）
の形態にある場合は、光学フィルタ１２ａ、 １２ｃの
透過光量を増加させるか、あるいは光学フィルタ１２ｂ
の透過光量を減少させればよいことになり、第３図（Ｂ
）において、光制御フィルタ１１を矢印Ｃ方向に移動さ
せればよい。また第５図（Ａ）（Ｂ）の形態において、
標準比視感度からのはずれが短波長域よりも長波長域の
ほうが大きい場合は、短波長域のはずれを均等にしたの
ち、上記の操作を行なう。また受光部の分光感度が第５
図（Ｃ）の形態にある場合は、光学フィルタ１２ｃの透
過光量を増加させ、光学フィルタ１２ａの透過光量を減
少させればよいことになり、第３図（Ａ）において、光
制御フィルタ１１を矢印Ｂ方向に移動させればよく、第
５図（Ｄ）の形態にある場合は、光学フィルタ１２ｃの
透過光量を減少させ、光学フィルタ１２ａの透過光量を
増加させればよいことになり、第３図（Ａ）において、
光制御フィルタ１１を矢印六方向に移動させればよい。Next, a method for matching the spectral sensitivity of the light receiving section to the standard luminous efficiency will be explained with reference to FIGS. 3 and 5. If the spectral sensitivity of the light-receiving section is in the form shown in FIG. In FIG. 3 (8), the light control filter 1
1 in the direction of the arrow, and as shown in Fig. 5 (B).
In this case, either increase the amount of light transmitted through the optical filters 12a and 12c, or increase the amount of light transmitted through the optical filters 12b.
All that is required is to reduce the amount of transmitted light, as shown in Figure 3 (B
), the light control filter 11 may be moved in the direction of arrow C. Moreover, in the form of FIG. 5(A)(B),
If the deviation from the standard luminous efficiency is larger in the long wavelength range than in the short wavelength range, the above operation is performed after equalizing the deviation in the short wavelength range. Also, the spectral sensitivity of the light receiving part is 5th
In the case of the configuration shown in FIG. 3(C), it is sufficient to increase the amount of transmitted light through the optical filter 12c and decrease the amount of transmitted light through the optical filter 12a. In FIG. 3(A), the light control filter 11 is It is only necessary to move it in the direction of arrow B, and in the case of the form shown in FIG. In Figure 3 (A),
The light control filter 11 may be moved in the six directions indicated by the arrows.
また、上記操作で標準比視感度に合致しない場合には、
まず上記操作で短波長域と長波長域との標準比視感度か
らのはずれが均等になるような光制御フィルタ１１の位
置を設定し、第５図（Ａ）（Ｂ）の形態の場合の操作を
行なえば良いことになり、受光部の分光感度の標準比視
感度からのはずれを微細補正することができる。In addition, if the above operation does not match the standard luminous efficiency,
First, by the above operation, set the position of the light control filter 11 such that the deviation from the standard luminous efficiency in the short wavelength region and the long wavelength region is equal, and then This means that the deviation of the spectral sensitivity of the light receiving section from the standard luminous efficiency can be finely corrected by simply performing the operation.
発明の効果
以上述べたごとく本発明によれば、視感度補正フィルタ
を３種類の光学フィルタで構成し、この視感度補正フィ
ルタからの透過光量を個別に制御できる光制御フィルタ
と組み合わせているため、受光部の分光感度を微細に調
整することができ、したがつ°て容易に標準比視感度に
合致させることができる。Effects of the Invention As described above, according to the present invention, the visibility correction filter is composed of three types of optical filters, and is combined with a light control filter that can individually control the amount of transmitted light from the visibility correction filter. The spectral sensitivity of the light-receiving section can be finely adjusted, and therefore can be easily made to match the standard luminous efficiency.
第１図は本発明の一実施例における照度計の受光部の分
解斜視図、第２図は同受光部において各光学フィルタに
個別に光を照射した時の受光部の分光感度特性の説明図
、第３図は同受光部の動作原理の説明図、第４図は視感
度補正フィルタを上下させた時の光制御フィルタと光学
フィルタとがなす入射立体角の説明図、第５図は受光部
の分光感度が標準比視感度からはずれる場合の形態の説
−明図、第６図は標準比視感度特性の説明図、１７図
は従来の照度計の受光部の断面図である。
１１・・・光制御フィルタ、１１ａ・・・遮光部、１１
ｂ・・・開口部、１２・・・視感度補正フィルタ、１２
ａ〜１２Ｃ・・・光学フィルタ、１３・・・光電変換素
子
代理人 森 本 義 弘
第１図
ｔ３−９Ｌ覧衾換家チ
第２図
第３図
ＵＡ）
ｒＢ）
第４図
／２に１２４ ／２ｔ−
第Ｓ図
第２図
（力
波長
第７図Fig. 1 is an exploded perspective view of the light receiving section of an illuminance meter in an embodiment of the present invention, and Fig. 2 is an explanatory diagram of the spectral sensitivity characteristics of the light receiving section when each optical filter is individually irradiated with light in the same light receiving section. , Fig. 3 is an explanatory diagram of the operating principle of the light receiving section, Fig. 4 is an explanatory diagram of the solid angle of incidence formed by the light control filter and the optical filter when the visibility correction filter is moved up and down, and Fig. 5 is an illustration of the light receiving unit. Fig. 6 is an explanatory diagram of the standard luminous efficiency characteristic, and Fig. 17 is a cross-sectional view of the light receiving section of a conventional illuminance meter. 11... Light control filter, 11a... Light shielding part, 11
b...Aperture, 12...Visibility correction filter, 12
a~12C... Optical filter, 13... Photoelectric conversion element agent Yoshihiro Morimoto Figure 1 t3-9L Viewing Figure 2 Figure 3 UA) rB) Figure 4/2 124 /2t- Fig. S Fig. 2 (force wavelength Fig. 7
Claims (1)
規則性を持たせて配置された分光透過特性の異なる３種
類の光学フィルタからなる視感度補正フィルタと、遮光
部と光が通過する開口部とを持ち前記視感度補正フィル
タの上方に配置された光制御フィルタとを備え、前記光
制御フィルタの軸心回りの回転ならびに軸心方向に沿う
移動により、受光部の分光感度が変化する構成とした照
度計の受光部。1. One photoelectric conversion element, a visibility correction filter consisting of three types of optical filters with different spectral transmission characteristics arranged regularly above the photoelectric conversion element, and a light shielding part through which light passes. a light control filter having an opening and disposed above the visibility correction filter, and the spectral sensitivity of the light receiving section is changed by rotation of the light control filter around the axis and movement along the axis direction. The light receiving part of the illuminance meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16272585A JPS6222032A (en) | 1985-07-22 | 1985-07-22 | Photodetection part of illuminance meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16272585A JPS6222032A (en) | 1985-07-22 | 1985-07-22 | Photodetection part of illuminance meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6222032A true JPS6222032A (en) | 1987-01-30 |
Family
ID=15760087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16272585A Pending JPS6222032A (en) | 1985-07-22 | 1985-07-22 | Photodetection part of illuminance meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6222032A (en) |
-
1985
- 1985-07-22 JP JP16272585A patent/JPS6222032A/en active Pending
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