JPS58201036A - Pyroelectric device - Google Patents
Pyroelectric deviceInfo
- Publication number
- JPS58201036A JPS58201036A JP57085861A JP8586182A JPS58201036A JP S58201036 A JPS58201036 A JP S58201036A JP 57085861 A JP57085861 A JP 57085861A JP 8586182 A JP8586182 A JP 8586182A JP S58201036 A JPS58201036 A JP S58201036A
- Authority
- JP
- Japan
- Prior art keywords
- pyroelectric
- energy
- electrode
- incident energy
- thermal
- 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
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N15/00—Thermoelectric devices without a junction of dissimilar materials; Thermomagnetic devices, e.g. using the Nernst-Ettingshausen effect
- H10N15/10—Thermoelectric devices using thermal change of the dielectric constant, e.g. working above and below the Curie point
Landscapes
- Radiation Pyrometers (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明は焦電効果によシ赤外線等の入射エネルギーを検
出する焦電装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pyroelectric device that detects incident energy such as infrared rays by the pyroelectric effect.
チタン酸鉛セラミックやＬｉＴａＯ３単結晶等は焦電効
果を有している。この焦電効果を用いて焦電体に入射し
た赤外線エネルギーに対応して焦電体２ページ
表面に発生する電荷を検出し、上記赤外線エネルギーを
検知することが行われている。ところが上記焦電体は赤
外線の吸収効率が低く、吸収効率を上げるため、赤外線
吸収率Ｑ大＠な白金黒やニッケル・クロム合金等の膜を
焦電体の表面に装着する等の工夫がなされている。Lead titanate ceramics, LiTaO3 single crystals, etc. have a pyroelectric effect. This pyroelectric effect is used to detect charges generated on the surface of the pyroelectric body 2 in response to infrared energy incident on the pyroelectric body, thereby detecting the infrared energy. However, the above-mentioned pyroelectric material has a low absorption efficiency of infrared rays, and in order to increase the absorption efficiency, measures have been taken such as attaching a film of platinum black or nickel-chromium alloy, etc., which has a high infrared absorption coefficient Q, to the surface of the pyroelectric material. ing.
すなわち、第１図に示すように焦電素体１の両面にニッ
ケル・クロム合金からなる熱電極２，３を装着したシ、
第２図に示すように焦電索体１のエネルギー入射面にニ
ッケル・クロム合金からなる熱電極２を装着し、その反
対面に入射エネルギーを反射するアルミニウムからなる
電極４を装着した構造になっていた。That is, as shown in FIG. 1, a pyroelectric element 1 is equipped with thermal electrodes 2 and 3 made of nickel-chromium alloy on both sides,
As shown in Fig. 2, a thermal electrode 2 made of a nickel-chromium alloy is attached to the energy incident surface of the pyroelectric cable 1, and an electrode 4 made of aluminum that reflects the incident energy is attached to the opposite surface. was.
このような従来例では、第１図のような例の場合は入射
赤外線エネルギーが焦電索体１及び熱電極２，３で吸収
しきれず、通過してし１つため、熱電極２，３の膜厚を
工夫しても入射エネルギーの高々７ｏ〜８０％程度しか
その検出に利用することができず、また第２図のような
例の場合でもアルミニウムの熱電極４で通過する赤外線
を遮断−ベーン
しても、入射エネルギーの高々６ｏ〜７６％程度しかそ
の検出に利用することができず、検出感度が低かった。In such a conventional example, in the case of the example shown in FIG. Even if the thickness of the film is modified, only about 70 to 80% of the incident energy can be used for detection, and even in the case of the example shown in Figure 2, the aluminum thermal electrode 4 blocks the infrared rays passing through. - Even with vanes, only about 60 to 76% of the incident energy could be used for detection, resulting in low detection sensitivity.
本発明は上記のような事情を考慮し、入射エネルギーの
吸収率を高め、高感度な検出特性を有し、且つ量産性に
富む構造の焦電装置を提供することにある。The present invention takes the above circumstances into consideration and provides a pyroelectric device having a structure that increases the absorption rate of incident energy, has highly sensitive detection characteristics, and is highly suitable for mass production.
本発明の一実施例を第３図、第４図に示し説明する。本
発明は第３図に示すように焦電素体６のエネルギー入射
面に入射エネルギーを吸収する例えばニッケル・クロム
合金等の熱電極６を装着し、その焦電素体６の熱電極６
の反対面に入射エネルギーを吸収する熱電極７と、さら
にその上に入射エネルギーを反射する例えばアルミニウ
ム、金等の電極８を装着した焦電体を、第４図に示すよ
うに金属パッケージ９内に収納した構造を有する焦電装
置である。第４図で１０はステム、１１はビン、１２は
絶縁体、１３はリード線、１４は窓材である。An embodiment of the present invention is shown in FIGS. 3 and 4 and will be described. In the present invention, as shown in FIG. 3, a thermal electrode 6 made of, for example, a nickel-chromium alloy, which absorbs incident energy, is attached to the energy incidence surface of the pyroelectric element 6, and the thermal electrode 6 of the pyroelectric element 6 is
A pyroelectric body, which is equipped with a thermal electrode 7 that absorbs incident energy on the opposite side of the body and an electrode 8 made of aluminum, gold, etc. that reflects the incident energy on the opposite side, is placed in a metal package 9 as shown in FIG. This is a pyroelectric device that has a structure housed in a pyroelectric device. In FIG. 4, 10 is a stem, 11 is a bottle, 12 is an insulator, 13 is a lead wire, and 14 is a window material.
本発明のような電極構造を有する焦電体を用いれば、入
射エネルギーの７５〜８５Ｘ程度を利用することができ
、従来よりも５〜２０％程度感度を上げることができる
。特に焦電体の熱時定数を下げるために焦電体の厚みを
薄くした時、焦電体を透過するエネルギー量が増大する
ため本発明は非常に有効である。また、電極構成は蒸着
によシ容易に形成でき、量産性に富んだ焦電装置を提供
するものである。By using a pyroelectric material having an electrode structure as in the present invention, it is possible to utilize approximately 75 to 85 times the incident energy, and the sensitivity can be increased by approximately 5 to 20% compared to the conventional method. In particular, when the thickness of the pyroelectric material is reduced in order to lower the thermal time constant of the pyroelectric material, the amount of energy transmitted through the pyroelectric material increases, so the present invention is very effective. In addition, the electrode structure can be easily formed by vapor deposition, providing a pyroelectric device that is highly mass-producible.
第１図及び第２図はそれぞれ従来例における焦電装置を
構成する焦電体の断面図、第３図は本考案に係る焦電装
置を構成する焦電体の一実施例を示す断面図、第４図は
第３図の焦電体を組込んだ本考案の焦電装置を示す概略
断面図である。
６・１０１１．焦電素体、６・７・・・・・・熱電極、
８・・団・電極。1 and 2 are cross-sectional views of a pyroelectric body constituting a conventional pyroelectric device, respectively, and FIG. 3 is a cross-sectional view showing an embodiment of a pyroelectric body constituting a pyroelectric device according to the present invention. , FIG. 4 is a schematic cross-sectional view showing a pyroelectric device of the present invention incorporating the pyroelectric body of FIG. 3. 6・1011. Pyroelectric element, 6, 7... thermal electrode,
8. Group electrode.
Claims (2)
吸収する熱電極を装着し、上記焦電素体のエネルギー入
射面と反対面に入射エネルギーを吸収する熱電極と、さ
らにその上に入射エネルギーを反射する電極を装着した
焦電体よシ構成されたことを特徴とする焦電装置。(1) A thermal electrode that absorbs incident energy is attached to the energy incidence surface of the pyroelectric cable, and a thermal electrode that absorbs incident energy is attached to the opposite surface of the pyroelectric element to the energy incidence surface, and a thermal electrode that absorbs incident energy is attached to the energy incidence surface of the pyroelectric element, and a A pyroelectric device comprising a pyroelectric body equipped with an electrode that reflects energy.
ロム合金で構成し、入射エネルギーを反射する電極をア
ルミニウムまたは金で構成してなる特許請求の範囲第１
項記載の焦電装置。(2) Claim 1, in which the thermal electrode that absorbs incident energy is made of a nickel-chromium alloy, and the electrode that reflects incident energy is made of aluminum or gold.
Pyroelectric device as described in section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57085861A JPS58201036A (en) | 1982-05-20 | 1982-05-20 | Pyroelectric device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57085861A JPS58201036A (en) | 1982-05-20 | 1982-05-20 | Pyroelectric device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58201036A true JPS58201036A (en) | 1983-11-22 |
Family
ID=13870658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57085861A Pending JPS58201036A (en) | 1982-05-20 | 1982-05-20 | Pyroelectric device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58201036A (en) |
-
1982
- 1982-05-20 JP JP57085861A patent/JPS58201036A/en active Pending
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