JPH04181126A - Sensor for invasion of infrared rays - Google Patents
Sensor for invasion of infrared raysInfo
- Publication number
- JPH04181126A JPH04181126A JP2307134A JP30713490A JPH04181126A JP H04181126 A JPH04181126 A JP H04181126A JP 2307134 A JP2307134 A JP 2307134A JP 30713490 A JP30713490 A JP 30713490A JP H04181126 A JPH04181126 A JP H04181126A
- Authority
- JP
- Japan
- Prior art keywords
- optical system
- infrared
- infrared rays
- divided
- lens
- 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
- 230000009545 invasion Effects 0.000 title 1
- 230000003287 optical effect Effects 0.000 claims abstract description 28
- 238000001514 detection method Methods 0.000 claims description 26
- 230000000694 effects Effects 0.000 abstract description 8
- 230000035945 sensitivity Effects 0.000 abstract description 7
- 239000000470 constituent Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Landscapes
- Geophysics And Detection Of Objects (AREA)
- Burglar Alarm Systems (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、人体等の検知対象物体から発せられた赤外線
を光学系によって焦電型赤外線検出素子上に集光し、人
体等の移動にともなって上記赤外線検出素子上の像が移
動することにより、上記赤外線検出素子に入射する赤外
線の量が変化する現象を利用して侵入者を検知する受動
型の赤外線侵入検知装置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention focuses infrared rays emitted from an object to be detected, such as a human body, onto a pyroelectric infrared detection element using an optical system, and detects the movement of a human body, etc. The present invention relates to a passive infrared intrusion detection device that detects an intruder by utilizing a phenomenon in which the amount of infrared rays incident on the infrared detection element changes as the image on the infrared detection element moves.
〔従来の技術］
この種の赤外線侵入検知装置では、移動体を検知できる
方向は、赤外線検出素子を含む光学系の軸上に限定され
る。したがって、複数方向の移動体の検出を可能にする
ためには、レンズ、反射鏡などの光学系を分割し、複数
の方向からの移動体の発する赤外線を同一の焦点に集光
できる構成とする必要がある。[Prior Art] In this type of infrared intrusion detection device, the direction in which a moving object can be detected is limited to the axis of the optical system including the infrared detection element. Therefore, in order to enable the detection of moving objects in multiple directions, the optical system such as lenses and reflectors must be divided to create a configuration that can focus infrared rays emitted by moving objects from multiple directions onto the same focal point. There is a need.
特に、装置前方の空間に立体的に対応させるためには、
光学系を縦横両方に分割する必要がある。In particular, in order to correspond three-dimensionally to the space in front of the device,
It is necessary to divide the optical system both vertically and horizontally.
第３図は従来のこの種の赤外線侵入検知装置の一例の構
成を示す。FIG. 3 shows the configuration of an example of a conventional infrared intrusion detection device of this type.
図において３は焦電型赤外線検出素子、１１は分割レン
ズアレーである。In the figure, 3 is a pyroelectric infrared detection element, and 11 is a divided lens array.
分割レンズアレー１１は、縦方向のみに分割した例を示
したが、空間に立体的に対応させるため、通常、縦横両
方向に分割したものを使用する。The divided lens array 11 has been shown as an example in which it is divided only in the vertical direction, but in order to three-dimensionally correspond to the space, it is normally used that is divided in both the vertical and horizontal directions.
分割レンズアレー１１の各構成単位ごとに赤外線検出素
子３を含む軸方向の人体等から発せられた赤外線を集光
して赤外線検出素子３上に結像させる。Infrared rays emitted from a human body or the like in the axial direction including the infrared detecting element 3 are collected and imaged on the infrared detecting element 3 for each constituent unit of the divided lens array 11 .
上記のような従来の赤外線侵入検知装置では、レンズま
たは反射鏡からなる光学系が、光学系を分割する機能と
赤外線を集光する機能の双方を同時に満足しなければな
らないため、許容される総受光面積が限られている場合
、所要検出軸数に反比例して、分割光学系−軸当たりの
受光面積を削減しなければならず、−軸当たりの集光能
力すなわち検出感度が低下するという問題があった。In the conventional infrared intrusion detection device described above, the optical system consisting of a lens or a reflecting mirror must simultaneously satisfy both the function of dividing the optical system and the function of concentrating infrared rays. When the light-receiving area is limited, the light-receiving area per axis of the split optical system must be reduced in inverse proportion to the number of detection axes required, which leads to the problem that the light-gathering ability per axis, that is, the detection sensitivity, decreases. was there.
本発明は上記の問題を解消するためになされたもので、
検出感度の良好なものを提供することを目的とする。The present invention was made to solve the above problems.
The purpose is to provide good detection sensitivity.
〔課題を解決するための手段〕
本発明の赤外線侵入検知装置は、人体等から発せられた
赤外線を先ずレンズまたは反射凹面鏡からなる第１の光
学系によって集光した後に、光学的に分割された構成単
位ごとに上記第１の光学系によって集光された像を同一
の焦電型赤外線検出素子上に結像させる第２の光学系に
よって集光する構成としたものである。[Means for Solving the Problem] The infrared infrared intrusion detection device of the present invention first focuses infrared rays emitted from a human body, etc. by a first optical system consisting of a lens or a reflective concave mirror, and then optically splits the infrared rays. The configuration is such that the image focused by the first optical system for each constituent unit is focused by a second optical system which forms the image on the same pyroelectric infrared detection element.
上記のように構成することにより、第１の光学系によっ
て装置に許容された受光面積全体を利用して任意の方向
からの入射赤外線を全て集光することができ、この第１
の光学系によって集光された像を第２の光学系の分割さ
れた構成単位ごとに同一の赤外線検出素子上に結像させ
るので、第２の光学系の分割構成単位に対応するいずれ
の方向についても第１の光学系の受光面積全体による集
光効果を利用でき、分割による感度低下を避けることが
できる。By configuring as described above, it is possible to condense all incident infrared rays from any direction by using the entire light-receiving area allowed for the device by the first optical system.
Since the image focused by the optical system is formed on the same infrared detection element for each divided structural unit of the second optical system, it is possible to Also, the light-condensing effect of the entire light-receiving area of the first optical system can be utilized, and a decrease in sensitivity due to division can be avoided.
第１図は本発明の一実施例の構成を示す。 FIG. 1 shows the configuration of an embodiment of the present invention.
図において１は第１の光学系のレンズ、２はレンズ１の
焦点の位置に配置した第２の光学系の分割プリズムアレ
ー、３は焦電型赤外線検出素子である。In the figure, 1 is a lens of the first optical system, 2 is a split prism array of the second optical system arranged at the focal point of the lens 1, and 3 is a pyroelectric infrared detection element.
第２図は分割プリズムアレー２の部分拡大図で、２１は
光入射面、２２は光射出面である。FIG. 2 is a partially enlarged view of the split prism array 2, where 21 is a light entrance surface and 22 is a light exit surface.
人体等から発せられた赤外線をレンズｌによって受光し
て集光し、分割プリズムアレー２の光入射面２１と、光
射出面２２の凹レンズにより上記レンズ１の集光によっ
てできた像を平行光線にするとともに、光入射面２１と
光射出面２２とのなす角により生ずるプリズム効果によ
って屈折させ、赤外線検出素子３上に結像させ、検出さ
せる。Infrared rays emitted from a human body, etc. are received and condensed by the lens l, and the image formed by the condensation of the lens 1 is converted into parallel light by the light entrance surface 21 of the split prism array 2 and the concave lens of the light exit surface 22. At the same time, the light is refracted by the prism effect caused by the angle formed by the light entrance surface 21 and the light exit surface 22, and is imaged on the infrared detection element 3 and detected.
上記のように動作し、分割プリズムアレー２の分割数と
同じ数の方向の検知が可能で、しかも、分割による感度
低下が生じない。It operates as described above, and it is possible to detect the same number of directions as the number of divisions of the divided prism array 2, and there is no reduction in sensitivity due to division.
上記には第２の光学系を縦方向に分割した実施例を示し
たが、第２の光学系を縦横両方向に分割すると、検知可
能な方向を二次元的に拡大できることは言うまでもない
。Although an embodiment in which the second optical system is divided in the vertical direction is shown above, it goes without saying that if the second optical system is divided in both the vertical and horizontal directions, the detectable direction can be expanded two-dimensionally.
なお、第１の光学系にレンズ１の代りに凹面反射鏡を用
いてもよい。そして、第２の光学系に分割凸面反射鏡ア
レーを用いて同等の効果を得ることができる。Note that a concave reflecting mirror may be used in place of the lens 1 in the first optical system. The same effect can be obtained by using a split convex reflecting mirror array in the second optical system.
また、第２の光学系を上記に例示した構成単位がレンズ
効果を持つプリズムのプリズムアレー２の代りに光入射
面２１と光射出面２２が平らな、すなわち、レンズ効果
を持たないプリズムのプリズムアレーを用いるか、凸面
反射鏡の代りに平面反射鏡を用い、これらを第１の光学
系の焦点より手前の位置に配置することにより、同様な
効果を得ることができる。In addition, instead of the prism array 2 in which the constituent unit of the second optical system is a prism having a lens effect as exemplified above, a prism having a flat light entrance surface 21 and a light exit surface 22, that is, a prism without a lens effect may be used. A similar effect can be obtained by using an array or by using a plane reflector instead of a convex reflector and placing these at a position before the focal point of the first optical system.
以上説明したように、本発明によれば、回答検知感度を
損なうことなく検知可能な方向を増すことができる。As described above, according to the present invention, it is possible to increase the number of detectable directions without impairing response detection sensitivity.
第１図は本発明の一実施例の構成を示す説明図、第２図
は第１図の分割プリズムアレーの部分拡大図、第３図は
従来のこの種の赤外線侵入検知装置の−例の構成を示す
説明図である。
１・・・レンズ、２・・・分割プリズムアレー、３・・
・焦電型赤外線検出素子
なお図中同一符号は同一または相当するものを示す。
特許出願人 新日本無線株式会社
第２図FIG. 1 is an explanatory diagram showing the configuration of an embodiment of the present invention, FIG. 2 is a partially enlarged view of the split prism array in FIG. 1, and FIG. 3 is an example of a conventional infrared intrusion detection device of this type. FIG. 2 is an explanatory diagram showing the configuration. 1...Lens, 2...Divided prism array, 3...
・Pyroelectric infrared detection element The same reference numerals in the figures indicate the same or equivalent elements. Patent applicant New Japan Radio Co., Ltd. Figure 2
Claims (1)
によって焦電型赤外線検出素子上に集光し、人体等の移
動にともなって上記赤外線検出素子上の像が移動するこ
とにより、上記赤外線検出素子に入射する赤外線の量が
変化する現象を利用して侵入者を検知する赤外線侵入検
知装置において、人体等から発せられた赤外線を先ずレ
ンズまたは反射凹面鏡からなる第１の光学系によって集
光した後に、光学的に分割された構成単位ごとに上記第
１の光学系によって集光された像を同一の焦電型赤外線
検出素子上に結像させる第２の光学系によって集光する
構成としたことを特徴とする赤外線侵入検知装置。The infrared rays emitted from the object to be detected, such as a human body, are focused onto the pyroelectric infrared detection element by an optical system, and the image on the infrared detection element moves as the human body moves, thereby detecting the infrared rays. In an infrared intrusion detection device that detects an intruder by utilizing a phenomenon in which the amount of infrared rays incident on an element changes, infrared rays emitted from a human body, etc. are first focused by a first optical system consisting of a lens or a reflective concave mirror. Later, the image collected by the first optical system for each optically divided structural unit was collected by a second optical system that formed an image on the same pyroelectric infrared detection element. An infrared intrusion detection device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2307134A JPH04181126A (en) | 1990-11-15 | 1990-11-15 | Sensor for invasion of infrared rays |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2307134A JPH04181126A (en) | 1990-11-15 | 1990-11-15 | Sensor for invasion of infrared rays |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04181126A true JPH04181126A (en) | 1992-06-29 |
Family
ID=17965442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2307134A Pending JPH04181126A (en) | 1990-11-15 | 1990-11-15 | Sensor for invasion of infrared rays |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04181126A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11167005A (en) * | 1997-12-05 | 1999-06-22 | Matsushita Electric Works Ltd | Multilens for infrared sensor |
-
1990
- 1990-11-15 JP JP2307134A patent/JPH04181126A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11167005A (en) * | 1997-12-05 | 1999-06-22 | Matsushita Electric Works Ltd | Multilens for infrared sensor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5442178A (en) | Cross-over field-of-view composite Fresnel lens for an infrared detection system | |
| NO944196L (en) | Device for receiving light rays | |
| JPH02112735A (en) | Optical sensor | |
| US5124546A (en) | Method and apparatus for refracting light to an optical detector | |
| US6528788B1 (en) | Detection of position and motion of sub-pixel images | |
| US5200624A (en) | Wide-angle radiant energy detector | |
| JPH04181126A (en) | Sensor for invasion of infrared rays | |
| JPH0638057B2 (en) | Optical device of heat ray detector | |
| KR960015008B1 (en) | Prevention apparatus of disasters having fire detection means | |
| JPH03199929A (en) | Optical sensor | |
| JPH0894438A (en) | Infrared sensor | |
| JPH08122144A (en) | Infrared detector | |
| JPS62276502A (en) | Fresnel lens | |
| JPS60200132A (en) | Detecting device of infrared rays | |
| JPH09230060A (en) | Human body detecting sensor | |
| RU2277250C2 (en) | Passive non-scanning television device for determining azimuth and/or coordinates of object | |
| JPH03199928A (en) | Optical sensor | |
| JP2599758B2 (en) | Moving object detection device | |
| JP2927437B2 (en) | Human body detection device | |
| JPH05332822A (en) | Wide-angle focusing lens | |
| JPS63158429A (en) | Optical structure of heat ray detector | |
| SU451034A1 (en) | Axisymmetric mirror system | |
| JPH0690028B2 (en) | Sun sensor | |
| JPH0792027A (en) | Pyroelectric infrared sensor | |
| JPS62245932A (en) | Photodetector |