JPH0258573B2 - - Google Patents
Info
- Publication number
- JPH0258573B2 JPH0258573B2 JP55100738A JP10073880A JPH0258573B2 JP H0258573 B2 JPH0258573 B2 JP H0258573B2 JP 55100738 A JP55100738 A JP 55100738A JP 10073880 A JP10073880 A JP 10073880A JP H0258573 B2 JPH0258573 B2 JP H0258573B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- cut filter
- spd
- organic
- infrared
- 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 - Lifetime
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/208—Filters for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation
-
- 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
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
-
- 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
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J1/4209—Photoelectric exposure meters for determining the exposure time in recording or reproducing
- G01J1/4214—Photoelectric exposure meters for determining the exposure time in recording or reproducing specially adapted for view-taking apparatus
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/22—Absorbing filters
- G02B5/223—Absorbing filters containing organic substances, e.g. dyes, inks or pigments
-
- 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)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Optical Filters (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は受光素子と有機質赤外線カツトフイ
ルタとを組み合わせた光検出装置、この光検出装
置を用いた露出計およびこの露出計を内蔵したカ
メラに関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a photodetection device that combines a light receiving element and an organic infrared cut filter, an exposure meter using this photodetection device, and a camera incorporating this exposure meter. It is.
カメラなどの自動露出計に用いられている光検
出装置の受光素子としては現在、主にシリコンフ
オトダイオード（以下、SPDと略称する）が使
用されている。SPDの各波長に対する出力の相
対値（分光感度）および比視感度曲線を第１図に
示す。図中１は比視感度曲線であり、２はSPD
の作用スペクトルである。露出計用としてSPD
を使用するためには、人間の目には感じない近赤
外領域の光をカツトし、SPDの分光感度を比視
感度曲線に相似させる必要がある。とくに、目に
感じない700〜1100nｍの光に対するSPDの出力
が大きいことから、この領域の光は露出計の誤動
作の大きな原因の一つとなる。このために700〜
1100nｍの光を何らかの方法でカツトする必要が
ある。
Currently, silicon photodiodes (hereinafter abbreviated as SPD) are mainly used as light receiving elements in photodetectors used in automatic exposure meters such as cameras. Figure 1 shows the relative output value (spectral sensitivity) and specific luminous efficiency curve for each wavelength of the SPD. In the figure, 1 is the specific luminous efficiency curve, and 2 is the SPD
This is the action spectrum of SPD for exposure meter
In order to use SPD, it is necessary to cut out light in the near-infrared region that is invisible to the human eye, and to make the spectral sensitivity of the SPD similar to the specific luminous efficiency curve. In particular, since the SPD output is large for light in the range of 700 to 1100 nm, which is invisible to the human eye, light in this range is one of the major causes of exposure meter malfunction. 700~ for this
It is necessary to somehow cut out the 1100nm light.
従来、この種の光検出装置は、無機系の近赤外
線吸収剤を用いたガラス製の近赤外線カツトフイ
ルタを、SPDの受光面に取り付けて実用に供し
ている。 Conventionally, this type of photodetection device has been put into practical use by attaching a near-infrared cut filter made of glass using an inorganic near-infrared absorber to the light-receiving surface of the SPD.
しかし、上記無機系近赤外線吸収剤を用いた無
機質の近赤外線カツトフイルタは可視領域の光の
透過率が低く、これを補うのにSPDの感度を上
げることによつて対処していた。SPDの感度を
上げることはリーク電流の増大につながり、光検
出装置として誤動作の原因となり、動作性能の点
から大きな問題となつていた。また、カツトフイ
ルタが無機質であるため、光検出装置の製造面か
らみて柔軟性に欠け、製造工程の改善も難しいの
が実情である。さらに、無機質のカツトフイルタ
は製造コストが高く、光検出装置としてのコスト
を大幅に上昇させてしまう。
However, the inorganic near-infrared cut filter using the above-mentioned inorganic near-infrared absorber has a low transmittance of light in the visible region, and this has been compensated for by increasing the sensitivity of the SPD. Increasing the sensitivity of SPDs leads to an increase in leakage current, causing malfunctions as a photodetector, posing a major problem in terms of operational performance. Furthermore, since the cut filter is inorganic, it lacks flexibility in terms of manufacturing the photodetector, and it is difficult to improve the manufacturing process. Furthermore, inorganic cut filters are expensive to manufacture, significantly increasing the cost of the photodetecting device.
以上のように、従来の無機系近赤外線吸収剤を
含む無機質近赤外線カツトフイルタを用いた光検
出装置では、その分光感度は比視感度曲線に相似
しているものの、光検出装置としての動作性能、
製造コストおよび製造工程の観点からは著しい欠
点を有している。 As described above, in the conventional photodetection device using an inorganic near-infrared cut filter containing an inorganic near-infrared absorber, although its spectral sensitivity is similar to the specific luminous efficiency curve, the operational performance as a photodetection device is
It has significant drawbacks from the viewpoint of manufacturing cost and manufacturing process.
この発明は、上記のような従来の欠点を除去す
るためになされたもので、カツトフイルタの材料
として有機物を用い、かつ近赤外線吸収剤として
有機系のものを用いることにより、可視領域の光
の透過率の大幅な上昇による光検出装置の動作性
能の著しい向上、製造工程の改善およびそれに伴
なう製造コストの低減を目的としている。 This invention was made in order to eliminate the above-mentioned drawbacks of the conventional technology, and by using an organic substance as the material of the cut filter and an organic substance as the near-infrared absorber, the transmission of light in the visible region is improved. The objective is to significantly improve the operating performance of the photodetector by significantly increasing the rate of use, improve the manufacturing process, and reduce manufacturing costs accordingly.
この発明は、つぎの一般式で示される金属錯体
からなる有機系近赤外線吸収剤を含む有機質近赤
外線カツトフイルタを、SPDからなる受光素子
の受光面側に配置して光検出装置を構成してい
る。
In this invention, a photodetector is constructed by arranging an organic near-infrared cut filter containing an organic near-infrared absorber made of a metal complex represented by the following general formula on the light-receiving surface side of a light-receiving element made of an SPD. .
（ただし、R1はメチル基、水素原子、塩素原子
または臭素原子、Ｘは第４級アンモニウム基をそ
れぞれ示す。）
有機質近赤外線カツトフイルタの材料として
は、アクリル系樹脂やポリカーボネート系樹脂を
はじめ、透明性の良好な樹脂であれば、いずれも
使用可能である。 (However, R 1 represents a methyl group, a hydrogen atom, a chlorine atom, or a bromine atom, and X represents a quaternary ammonium group.) Materials for organic near-infrared cut filters include acrylic resins, polycarbonate resins, and transparent resins. Any resin with good properties can be used.
このような有機系近赤外線吸収剤は、可視領域
で殆んど吸収を示さず、近赤外領域で大きな吸収
を有する。したがつて、この有機系近赤外線吸収
剤を含むカツトフイルタと、SPDとの組合せに
より、SPDの出力を比視感度曲線に近づけるこ
とができる。また、カツトフイルタは有機質であ
るから、可視領域における光透過性が優れている
ので、SPDの出力が大きくなるうえに、カツト
フイルタ自身の製造が容易である。
Such an organic near-infrared absorber exhibits almost no absorption in the visible region and has large absorption in the near-infrared region. Therefore, by combining the cut filter containing this organic near-infrared absorber with the SPD, the output of the SPD can be brought close to the specific luminous efficiency curve. Furthermore, since the cut filter is organic, it has excellent light transmittance in the visible region, which not only increases the output of the SPD, but also makes the cut filter itself easy to manufacture.
第２図に、上記一般式で示す金属錯体（ただ
し、R1はCH3、ＸはＮ（C4H9-o）4）を含有させた
ポリメチルメタアクリレートにて形成した近赤外
線カツトフイルタと、従来の無機系カツトフイル
タの光透過率を示す。第２図において、３は有機
質カツトフイルタ、４は従来の無機質カツトフイ
ルタである。第２図から明らかなように、有機質
カツトフイルタは従来品に比べて２〜３倍の可視
領域の光透過性を示す。
Figure 2 shows a near-infrared cut filter formed from polymethyl methacrylate containing a metal complex represented by the above general formula (where R 1 is CH 3 and X is N(C 4 H 9-o ) 4 ). , shows the light transmittance of a conventional inorganic cut filter. In FIG. 2, 3 is an organic cut filter, and 4 is a conventional inorganic cut filter. As is clear from FIG. 2, the organic cut filter exhibits 2 to 3 times higher light transmittance in the visible region than conventional products.
また、第３図で示すようにカツトフイルタを
SPDの受光面側に取り付け、このSPDの分光感
度を測定した結果を第４図に示す。第４図におい
て、１は参考のために示した第１図と同じ比視感
度曲線を、５は有機質カツトフイルタを用いたと
きのSPDの分光感度を、６は従来の無機質カツ
トフイルタを用いたときのSPDの分光感度を示
す。なお、図中では有機質カツトフイルタを用い
たときのSPDの分光感度の最大値で規格化され
ている。 Also, as shown in Figure 3, a cut filter is installed.
Figure 4 shows the results of measuring the spectral sensitivity of this SPD by attaching it to the light-receiving surface side of the SPD. In Figure 4, 1 is the same specific luminous efficiency curve as in Figure 1 shown for reference, 5 is the spectral sensitivity of SPD when an organic cutoff filter is used, and 6 is the spectral sensitivity when a conventional inorganic cutoff filter is used. Shows the spectral sensitivity of SPD. In the figure, the values are normalized by the maximum spectral sensitivity of SPD when an organic cut filter is used.
第４図から明確なように、有機質カツトフイル
タを用いたときのSPDの分光感度の形は、比視
感度曲線によく合つている。また、上記一般式で
示す金属錯体において、R1が水素原子、塩素原
子または臭素原子についても、第２図および第３
図とほぼ同一のデータが得られた。 As is clear from Figure 4, the shape of the spectral sensitivity of SPD when an organic cut filter is used fits well with the specific luminous efficiency curve. Furthermore, in the metal complex represented by the above general formula, when R 1 is a hydrogen atom, a chlorine atom, or a bromine atom, FIGS.
Almost the same data as shown in the figure was obtained.
以上説明したように、この発明の有機質カツト
フイルタは、SPDからなる受光素子との組合せ
により、SPDの出力を比視感度曲線に近づける
ことができ、しかも、可視領域における光透過率
が優れているためにSPDの出力も大きく、無機
質カツトフイルタを用いたときと同じ出力にする
のにSPDの感度を下げることができる。その結
果、リーク電流も少なくなり、光検出装置として
の誤動作も極端に下がり、性能が大幅に向上す
る。さらに吸収剤が有機物であるために製造工程
の改善も容易に計ることができ、製造コストも大
幅に低減されることになる。
As explained above, the organic cut filter of the present invention can bring the SPD output close to the specific luminous efficiency curve when combined with a light receiving element made of SPD, and has excellent light transmittance in the visible region. The output of the SPD is also large, and the sensitivity of the SPD can be lowered to achieve the same output as when using an inorganic cut filter. As a result, leakage current is reduced, malfunctions as a photodetector are extremely reduced, and performance is greatly improved. Furthermore, since the absorbent is an organic substance, the manufacturing process can be easily improved, and the manufacturing cost can be significantly reduced.
また、以上は、光検出装置について述べたが、
この発明の光検出装置を用いた露出計やこの露出
計を内蔵した自動露出カメラについても、使用さ
れた光検出装置の動作性能の大幅な向上および製
造コストの低減によつて、露出計や自動露出カメ
ラ自体の動作性能も向上し、製造コストも低くな
る。 In addition, although the photodetection device has been described above,
Exposure meters using the photodetector of this invention and automatic exposure cameras incorporating this exposure meter have also been improved by significantly improving the operating performance of the photodetector and reducing manufacturing costs. The operating performance of the exposure camera itself is improved, and manufacturing costs are also reduced.
第１図は比視感度曲線とシリコンフオトダイオ
ードの分光感度を示す特性図、第２図は（）式
で示す化合物を赤外線吸収剤として用いた有機質
カツトフイルタと従来の無機質カツトフイルタの
光透過曲線を示す特性図、第３図はシリコンフオ
トダイオードにカツトフイルタを取り付けて分光
感度を測定する状態を示す概略説明図、第４図は
第３図の状態で測定したシリコンフオトダイオー
ドの分光感度を示す特性図である。
１……比視感度曲線、２……シリコンフオトダ
イオードの分光感度、３……有機質カツトフイル
タの光透過率曲線、４……従来の無機質カツトフ
イルタの光透過率曲線、５……有機質カツトフイ
ルタを取り付けたときのシリコンフオトダイオー
ドの分光感度、６……従来の無機質カツトフイル
タを取り付けたときのシリコンフオトダイオード
の分光感度。
Figure 1 is a characteristic diagram showing the specific luminous efficiency curve and the spectral sensitivity of a silicon photodiode, and Figure 2 shows the light transmission curves of an organic cutoff filter using the compound represented by formula () as an infrared absorber and a conventional inorganic cutoff filter. Characteristic diagram, Figure 3 is a schematic explanatory diagram showing the state in which a cut filter is attached to a silicon photodiode to measure the spectral sensitivity, and Figure 4 is a characteristic diagram showing the spectral sensitivity of the silicon photodiode measured under the condition shown in Figure 3. be. 1... Specific luminous efficiency curve, 2... Spectral sensitivity of silicon photodiode, 3... Light transmittance curve of organic cut filter, 4... Light transmittance curve of conventional inorganic cut filter, 5... Organic cut filter attached. Spectral sensitivity of a silicon photodiode when 6... Spectral sensitivity of a silicon photodiode when a conventional inorganic cut filter is attached.
Claims (1)
子、Ｘは第４級アンモニウム基） で表される有機系近赤外線吸収剤を含む有機質近
赤外線カツトフイルタをシリコンフオトダイオー
ドからなる受光素子の受光面側に配置したことを
特徴とする光検出装置。 ２ 一般式 （ただし、R1はメチル基、水素原子又は塩素原
子、Ｘは第４級アンモニウム基） で表される有機系近赤外線吸収剤を含む有機質近
赤外線カツトフイルタをシリコンフオトダイオー
ドからなる受光素子の受光面に配置した光検出装
置を含む露出計。 ３ 一般式 （ただし、R1はメチル基、水素原子又は塩素原
子、Ｘは第４級アンモニウム基） で表される有機系近赤外線吸収剤を含む有機質近
赤外線カツトフイルタをシリコンフオトダイオー
ドからなる受光素子の受光面に配置した光検出装
置を露出計として内蔵するカメラ。[Claims] 1. General formula (However, R 1 is a methyl group, a hydrogen atom, or a chlorine atom, and X is a quaternary ammonium group.) An organic near-infrared cut filter containing an organic near-infrared absorber represented by is connected to the light-receiving surface of a light-receiving element made of a silicon photodiode. A photodetecting device characterized in that it is placed on the side. 2 General formula (However, R 1 is a methyl group, a hydrogen atom, or a chlorine atom, and X is a quaternary ammonium group.) An organic near-infrared cut filter containing an organic near-infrared absorber represented by is connected to the light-receiving surface of a light-receiving element made of a silicon photodiode. A light meter that includes a light detection device located at. 3 General formula (However, R 1 is a methyl group, a hydrogen atom, or a chlorine atom, and X is a quaternary ammonium group.) An organic near-infrared cut filter containing an organic near-infrared absorber represented by is connected to the light-receiving surface of a light-receiving element made of a silicon photodiode. A camera that has a built-in light detection device placed in it as an exposure meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10073880A JPS5724831A (en) | 1980-07-21 | 1980-07-21 | Light detector, and exposure meter and camera incorporating said detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10073880A JPS5724831A (en) | 1980-07-21 | 1980-07-21 | Light detector, and exposure meter and camera incorporating said detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5724831A JPS5724831A (en) | 1982-02-09 |
| JPH0258573B2 true JPH0258573B2 (en) | 1990-12-10 |
Family
ID=14281901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10073880A Granted JPS5724831A (en) | 1980-07-21 | 1980-07-21 | Light detector, and exposure meter and camera incorporating said detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5724831A (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5023388A (en) * | 1973-07-05 | 1975-03-13 | ||
| JPS6021324B2 (en) * | 1977-05-25 | 1985-05-27 | キヤノン株式会社 | Light receiving device |
-
1980
- 1980-07-21 JP JP10073880A patent/JPS5724831A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5724831A (en) | 1982-02-09 |
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