JP2876518B2 - Time-division multi-wavelength lightwave measurement device - Google Patents
Time-division multi-wavelength lightwave measurement deviceInfo
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- JP2876518B2 JP2876518B2 JP21296794A JP21296794A JP2876518B2 JP 2876518 B2 JP2876518 B2 JP 2876518B2 JP 21296794 A JP21296794 A JP 21296794A JP 21296794 A JP21296794 A JP 21296794A JP 2876518 B2 JP2876518 B2 JP 2876518B2
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- laser
- light wave
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Description
【０００１】[0001]
【産業上の利用分野】この発明は、制約された場所に単
一または複数の波長領域のレーザ送信手段と、単一また
は複数の波長領域の反射及び放射赤外線検知手段を収納
し、時分割でアクティブ方式動作とパッシブ方式動作を
する多波長光波計測装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention accommodates laser transmitting means in one or a plurality of wavelength regions and reflection and radiating infrared detecting means in a single or a plurality of wavelength regions in a restricted place, and performs time division. The present invention relates to a multi-wavelength light wave measuring device that operates in an active mode and a passive mode.
【０００２】[0002]
【従来の技術】従来、多波長光波計測装置を実現する場
合、目標の物体から放射される赤外線を受光するパッシ
ブ方式光波計測においては、図３に示す受光面分割方式
と、図４に示す多段受光方式とが知られている。2. Description of the Related Art Conventionally, when a multi-wavelength light wave measuring apparatus is realized, in a passive light wave measurement for receiving infrared rays radiated from a target object, a light receiving surface dividing method shown in FIG. A light receiving method is known.
【０００３】図３の受光面分割方式は、波長感度特性の
異なる２組の光学フィルタ１１ａ，１１ｂと受光素子１
２ａ，１２ｂを集光レンズ１３の焦点面に同心状に分割
配置することにより、二波長の入射光を分離、検出する
ようにしたものである。[0003] The light receiving surface splitting method shown in FIG. 3 employs two sets of optical filters 11a and 11b and a light receiving element 1 having different wavelength sensitivity characteristics.
2a and 12b are arranged concentrically on the focal plane of the condenser lens 13 to separate and detect two wavelengths of incident light.
【０００４】図４の多段受光方式は、波長感度特性の異
なる２組の光学フィルタ２１ａ，２１ｂと受光素子２２
ａ，２２ｂを集光レンズ２３の光軸Ｌ−Ｌ方向に多段に
配置することにより二波長の入射光を分離、検出するよ
うにしたものである。The multi-stage light receiving system shown in FIG. 4 employs two sets of optical filters 21a and 21b and a light receiving element 22 having different wavelength sensitivity characteristics.
By arranging a and 22b in multiple stages in the optical axis LL direction of the condenser lens 23, incident light of two wavelengths is separated and detected.
【０００５】[0005]
【発明が解決しようとする課題】ところで、上述した受
光面分割方式および多段受光方式による構成を限られた
収納場所、例えば飛しょう体内に適用した場合、図３の
受光面分割方式では、集光レンズ１３によって集光され
た入射光の検知エネルギーの感度が受光面の面積によっ
て決まるが、入射光が受光面の分割に対応した比率で配
分される構成なので、受光面が１つのものに比べて光学
系の有効視野内の入射光の利用効率が低下するという問
題がある。When the above-described structure using the light receiving surface division method and the multi-stage light receiving method is applied to a limited storage space, for example, a flying object, the light receiving surface division method shown in FIG. The sensitivity of the detection energy of the incident light condensed by the lens 13 is determined by the area of the light receiving surface. However, since the incident light is distributed at a ratio corresponding to the division of the light receiving surface, the light receiving surface is compared with a single light receiving surface. There is a problem that the utilization efficiency of incident light within the effective visual field of the optical system is reduced.
【０００６】また、図４の多段受光方式では、光学フィ
ルタ２１ａ，２１ｂおよび受光素子２２ａ，２２ｂを集
光レンズ２３の光軸Ｌ−Ｌ方向に多段に配置する構成な
ので、焦点面が片側にずれるだけでなく、前段の受光素
子２２ａを透過した光を後段の受光素子２２ｂで検知し
ているので、光が前段の受光素子２２ａを透過する時に
減衰が生じ、後段の受光素子２２ｂ面への入射光が減少
するという問題がある。In the multi-stage light receiving system shown in FIG. 4, the optical filters 21a and 21b and the light receiving elements 22a and 22b are arranged in multiple stages in the optical axis LL direction of the condenser lens 23, so that the focal plane is shifted to one side. In addition, since the light transmitted through the preceding light receiving element 22a is detected by the latter light receiving element 22b, attenuation occurs when the light passes through the preceding light receiving element 22a, and the light is incident on the surface of the latter light receiving element 22b. There is a problem that light is reduced.
【０００７】しかも、いずれの方式でも、光学的なアク
ティブ方式光波計測とパッシブ方式光波計測による多波
長計測装置を限られた収納場所、例えば飛しょう体内で
は実現できないといった問題がある。In addition, any of these methods has a problem that a multi-wavelength measuring device using optical active light wave measurement and passive light wave measurement cannot be realized in a limited storage space, for example, a flying object.
【０００８】以上述べたように、従来の構成では、集光
レンズ部により集光された入射光量を大きく損なうこと
なく、制約された場所にアクティブ方式光波計測とパッ
シブ方式光波計測を両立させて多波長の計測装置を収納
することは実現困難であった。As described above, in the conventional configuration, the active type light wave measurement and the passive type light wave measurement can be performed in a restricted place without greatly impairing the amount of incident light condensed by the condenser lens unit. It was difficult to accommodate a wavelength measuring device.
【０００９】そこで、この発明は、上述した問題を解決
するためなされたもので、制約された場所、例えば飛し
ょう体に収納でき、集光レンズ部により集光された光量
を大きく損なうことなく、時分割によるアクティブ方式
光波計測とパッシブ方式光波計測を両立させて光波領域
の複数波長帯にわたる計測が行なえる時分割多波長光波
計測装置を提供することを目的とする。Therefore, the present invention has been made to solve the above-mentioned problem, and can be accommodated in a restricted place, for example, a flying object, without significantly impairing the amount of light condensed by the condenser lens unit. It is an object of the present invention to provide a time-division multi-wavelength light wave measurement device capable of performing measurement over a plurality of wavelength bands in a light wave region while achieving both active light wave measurement and passive light wave measurement by time division.
【００１０】[0010]
【課題を解決するための手段】上記目的を達成するため
のこの発明に係る多波長光波計測装置は、レーザ光を出
力するレーザ送信部と、前記レーザ光に伴う目標の物体
からの反射光または該目標の物体から放射される赤外線
の所定波長の光波のみを通過させる光学フィルタ部と、
該光学フィルタ部を通過した光波を受光検出する受光部
と、前記光学フィルタ部の受光帯域波長を前記レーザ送
信部の送信帯域波長または前記目標の物体から放射され
る赤外線に対応して選択的に切り換えるとともに、前記
レーザ送信部のレーザ光の発射・停止を制御して、前記
レーザ光に伴う前記目標の物体からの反射光を検出して
計測するアクティブ方式光波計測と、前記目標の物体よ
り放射される赤外線を検出して計測するパッシブ方式光
波計測とを時分割に行なうためのモード制御部とを具備
したことを特徴としている。According to the present invention, there is provided a multi-wavelength light wave measuring apparatus, comprising: a laser transmitting section for outputting a laser beam; and a reflected light from a target object accompanying the laser beam. An optical filter unit that allows only a light wave of a predetermined wavelength of infrared light emitted from the target object to pass,
A light-receiving unit that receives and detects a light wave that has passed through the optical filter unit; and selectively receives a light-receiving band wavelength of the optical filter unit according to a transmission band wavelength of the laser transmission unit or infrared light emitted from the target object. Switching, and controlling the emission and stop of the laser beam of the laser transmission unit, detecting and measuring the reflected light from the target object accompanying the laser beam, and radiating from the target object. A passive mode light wave measurement for detecting and measuring infrared rays to be performed in a time sharing manner.
【００１１】また、前記レーザ送信手段は、異なる波長
領域にて複数具備し、前記光学フィルタ部の受光帯域波
長は、選択された前記レーザ送信手段の送信帯域波長と
同一波長に切り換えられ、異なる波長領域のアクティブ
方式光波計測と、単一波長領域のパッシブ方式光波計測
とを時分割に行なう。A plurality of the laser transmitting means are provided in different wavelength ranges, and a light receiving band wavelength of the optical filter section is switched to the same wavelength as a selected transmitting band wavelength of the laser transmitting means. Active lightwave measurement of a region and passive lightwave measurement of a single wavelength region are performed in a time-division manner.
【００１２】さらに、前記レーザ送信手段は、単一の波
長領域にて具備し、前記光学フィルタ部の受光帯域波長
は、目標の物体より放射される赤外線に応じた複数の波
長領域に切り換えられ、単一波長領域のアクティブ方式
光波計測と、異なる波長領域のパッシブ方式光波計測と
を時分割に行なう。Further, the laser transmitting means is provided in a single wavelength range, and a light receiving band wavelength of the optical filter is switched to a plurality of wavelength ranges according to infrared rays emitted from a target object. Active lightwave measurement in a single wavelength region and passive lightwave measurement in a different wavelength region are performed in a time sharing manner.
【００１３】また、 前記レーザ送信手段は、異なる波
長領域にて複数具備し、前記光学フィルタ部の受光帯域
波長は、目標の物体より放射される赤外線に応じた複数
の波長領域に切り換えられ、異なる波長領域のアクティ
ブ方式光波計測と、異なる波長領域のパッシブ方式光波
計測とを時分割に行なう。[0013] Further, the laser transmitting means is provided in plural in different wavelength regions, and a light receiving band wavelength of the optical filter section is switched to a plurality of wavelength regions corresponding to infrared rays radiated from a target object. Active lightwave measurement in a wavelength region and passive lightwave measurement in a different wavelength region are performed in a time sharing manner.
【００１４】[0014]
【作用】上記のように構成された多波長光波計測装置に
おいて、アクティブ方式光波計測する場合には、モード
制御部により、光学フィルタ部の受光帯域波長をレーザ
送信部の送信帯域波長と同一波長に切り換えてレーザ送
信部よりレーザ光を目標の物体に向けて発射させる。レ
ーザ光は目標の物体に導かれて反射し、反射した光波は
光学フィルタ部で受光帯域波長のみが通過し、受光部に
受光検出されて信号処理される。パッシブ方式光波計測
する場合には、モード制御部により、光学フィルタ部の
受光帯域波長を目標の物体から放射される赤外線に対応
して選択的に切り換えてレーザ送信部からのレーザ光の
発射を停止させる。この状態で、目標の物体より放射さ
れる赤外線は光学フィルタ部で受光帯域波長のみが通過
し、受光部に受光検出されて信号処理される。以上のア
クティブ方式光波計測とパッシブ方式光波計測とを、モ
ード制御部の切換動作により、単一波長帯域または異な
る複数の波長帯域にて時分割に行なう。In the multi-wavelength light wave measuring apparatus configured as described above, when the active light wave measurement is performed, the light receiving band wavelength of the optical filter unit is set to the same wavelength as the transmission band wavelength of the laser transmitting unit by the mode control unit. By switching, the laser beam is emitted from the laser transmission section toward the target object. The laser light is guided to and reflected by the target object, and the reflected light wave passes through only the light receiving band wavelength in the optical filter unit, and is received and detected by the light receiving unit and subjected to signal processing. In the case of passive lightwave measurement, the mode control unit selectively switches the light receiving band wavelength of the optical filter unit according to the infrared radiation radiated from the target object, and stops the emission of laser light from the laser transmission unit. Let it. In this state, the infrared light emitted from the target object passes through only the light receiving band wavelength in the optical filter unit, is received by the light receiving unit, detected and processed. The above-described active lightwave measurement and passive lightwave measurement are performed in a single wavelength band or a plurality of different wavelength bands in a time division manner by a switching operation of the mode control unit.
【００１５】[0015]
【実施例】以下、図１及び図２を参照してこの発明の一
実施例を説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.
【００１６】図１は本発明による時分割多波長光波計測
装置の一実施例を示すブロック図、図２は同計測装置の
信号のタイミングチャート図である。この計測装置は、
モード制御部１、レーザ送信部２、光波分岐部３、集光
レンズ部４、光学帯域可変フィルタ部５、受光部６、信
号処理部７を備えて構成されている。そして、可視光を
含む複数の波長領域のレーザ光を目標Ｗの物体に発射し
た時の反射光を受光して計測するアクティブ方式光波計
測（以下、アクティブ計測という）と、目標の物体から
放射される複数の波長領域の赤外線を受光して計測する
パッシブ方式光波計測（以下、パッシブ計測という）と
を時分割に行なっている。FIG. 1 is a block diagram showing an embodiment of a time-division multi-wavelength light wave measuring device according to the present invention, and FIG. 2 is a timing chart of signals of the measuring device. This measuring device
It comprises a mode control unit 1, a laser transmission unit 2, an optical wave branching unit 3, a condenser lens unit 4, an optical band variable filter unit 5, a light receiving unit 6, and a signal processing unit 7. Active light wave measurement (hereinafter, referred to as active measurement) that receives and measures reflected light when laser light in a plurality of wavelength regions including visible light is emitted to the target W object, and is emitted from the target object. And a passive lightwave measurement (hereinafter, referred to as passive measurement) for receiving and measuring infrared rays in a plurality of wavelength regions.
【００１７】モード制御部１は、アクティブ計測による
モードと、パッシブ計測によるモードとを選択的に切り
換え、両方の計測を時分割に行なうための指令を出して
レーザ送信部、光学帯域可変フィルタ部および信号処理
部を制御しており、送受切換指令部１ａとタイミング発
生部１ｂを備えて構成されている。送受切換指令部１ａ
は、例えば図２のタイミングチャート図に示すように、
一連の時刻を管理し、アクティブ計測とパッシブ計測を
時分割に行なうための指令をタイミング発生部１ｂに出
力している。The mode control unit 1 selectively switches between a mode based on active measurement and a mode based on passive measurement, issues a command for performing both measurements in a time-division manner, and outputs a laser transmission unit, an optical band variable filter unit, It controls the signal processing unit and includes a transmission / reception switching command unit 1a and a timing generation unit 1b. Transmission / reception switching command section 1a
Is, for example, as shown in the timing chart of FIG.
A command for managing a series of times and performing active measurement and passive measurement in a time-sharing manner is output to the timing generator 1b.
【００１８】タイミング発生部１ｂは、送受切換指令部
１ａからの指令を受け、図２のタイミングチャート図に
示す一連のタイミング信号として、アクティブ／パッシ
ブ切換指令信号Ｓ１、アクティブモード送受切換信号Ｓ
２およびアクティブモードレーザ送信指令信号Ｓ３を発
生している。図２の例では、最初のアクティブ／パッシ
ブ切換指令信号Ｓ１ａでアクティブ計測モード状態とな
り、次のアクティブ／パッシブ切換指令信号Ｓ１ｂでパ
ッシブ計測モード状態に切り換わり、アクティブ／パッ
シブ切換指令信号Ｓ１が出力される毎にアクティブ計測
モード状態とパッシブ計測モード状態とが交互に切り換
えられるようになっている。The timing generator 1b receives a command from the transmission / reception switching command unit 1a, and generates an active / passive switching command signal S1 and an active mode transmission / reception switching signal S1 as a series of timing signals shown in the timing chart of FIG.
2 and an active mode laser transmission command signal S3. In the example of FIG. 2, the first active / passive switching command signal S1a switches to the active measurement mode state, the next active / passive switching command signal S1b switches to the passive measurement mode state, and the active / passive switching command signal S1 is output. The active measurement mode state and the passive measurement mode state are alternately switched every time.
【００１９】また、アクティブ計測モード状態の時に、
レーザ送信部２および光学帯域可変フィルタ部５にアク
ティブモード送受切換信号Ｓ２を出力して送信および受
信の切換を制御している。さらに説明すると、アクティ
ブ計測モードの送信状態では、レーザ送信部２にアクテ
ィブモード送受切換信号Ｓ２ａを出力して複数の中から
所望送信帯域波長のレーザ送信器（２ａ〜２ｎのいずれ
か）を選択し、レーザ光の発射を制御して送信動作を行
なっている。そして、次のアクティブモード送受切換信
号Ｓ２ｂにより受信状態に切り換わった時に、光学帯域
可変フィルタ部５の受光帯域波長をレーザ送信器（２ａ
〜２ｎのいずれか）の送信帯域波長と同一の波長に設定
して受信動作を行なっている。In the active measurement mode state,
An active mode transmission / reception switching signal S2 is output to the laser transmission unit 2 and the optical band variable filter unit 5 to control switching between transmission and reception. More specifically, in the transmission state of the active measurement mode, an active mode transmission / reception switching signal S2a is output to the laser transmission unit 2 to select a laser transmitter (any one of 2a to 2n) having a desired transmission band wavelength from among a plurality. The transmission operation is performed by controlling the emission of laser light. Then, when the receiving mode is switched to the receiving mode by the next active mode transmission / reception switching signal S2b, the light receiving band wavelength of the optical band variable filter unit 5 is changed to the laser transmitter (2a).
2n), the receiving operation is performed with the same wavelength as the transmission band wavelength.
【００２０】また、パッシブ計測モード状態では、その
ままパッシブ受信状態となり、光学帯域可変フィルタ部
５の受光帯域波長を目標Ｗの物体が放射する赤外線に応
じて３〜５μｍの間の所望の値に設定して受信動作を行
なっている。Further, in the passive measurement mode state, the passive reception state is set as it is, and the light receiving band wavelength of the optical band variable filter unit 5 is set to a desired value between 3 and 5 μm according to the infrared light emitted by the object of the target W. To perform the receiving operation.
【００２１】レーザ送信部２は、例えば０．７〜１．０
μｍ（ＡｌＧａＡｓ）あるいは１．０〜１．３μｍ（Ｉ
ｎＧａＡｓ）の波長帯域を有し、レーザ光を作り出す成
分比に応じて上記波長帯域間に異なる送信帯域波長によ
る複数のレーザ送信器２ａ，２ｂ，…，２ｎを備えてい
る。このレーザ送信部２は、アクティブ計測モード時に
おいて、タイミング発生部１ｂからアクティブモードレ
ーザ送信指令信号Ｓ３が入力された時に、選択設定され
たレーザ送信器（２ａ〜２ｎのいずれか）より所定波長
領域のレーザ光を光波分岐部３に出力している。また、
パッシブ計測モード時に、レーザ光の送信を停止してい
る。The laser transmitting section 2 has, for example, 0.7 to 1.0
μm (AlGaAs) or 1.0 to 1.3 μm (I
.., 2n with different transmission band wavelengths between the wavelength bands according to the component ratio for producing laser light. In the active measurement mode, when the active mode laser transmission command signal S3 is input from the timing generator 1b in the active measurement mode, the laser transmitter (one of 2a to 2n) selected and set has a predetermined wavelength range. Is output to the light wave branching unit 3. Also,
In the passive measurement mode, transmission of laser light is stopped.
【００２２】光波分岐部３は、例えばビームスプリッタ
で構成され、レーザ送信部２からのレーザ光を集光レン
ズ部４側に導き、集光レンズ部４からの光波を光学帯域
可変フィルタ部５側に導いている。The light wave branching unit 3 is composed of, for example, a beam splitter, guides the laser light from the laser transmitting unit 2 to the condenser lens unit 4 side, and converts the light wave from the condenser lens unit 4 to the optical band variable filter unit 5 side. Leading to.
【００２３】集光レンズ部４は、アクティブ計測モード
時において、レーザ送信部２からのレーザ光を目標Ｗの
物体側に発射し、これに伴う目標Ｗの物体からの反射光
を集光している。In the active measurement mode, the condenser lens unit 4 emits the laser beam from the laser transmission unit 2 to the object side of the target W, and condenses the reflected light from the object of the target W accordingly. I have.
【００２４】光学帯域可変フィルタ部５は、単一素子の
能動フィルタであって、例えば電圧を印加した時の歪み
によって周波数の選択性が出るピエゾ抵抗効果素子で構
成されている。この光学帯域可変フィルタ部５では、タ
イミング発生部１ａからのアクティブモード送受切換信
号Ｓ２に基づいてその時に通過可能な光波の受光帯域波
長が選択設定される。さらに説明すると、アクティブ計
測モード時には、０．７〜１．０μｍあるいは１．０〜
１．３μｍの間で選択設定された送信帯域波長と同一の
波長領域による受光帯域波長が選択設定される。また、
パッシブ計測モード時には、目標Ｗの物体が放射する赤
外線の波長に応じて３〜３．５μｍあるいは４〜５μｍ
の間の所望の波長が受光帯域波長として選択設定され
る。The optical band variable filter unit 5 is a single-element active filter, and is composed of, for example, a piezoresistive element in which frequency selectivity is increased by distortion when a voltage is applied. In the optical band variable filter unit 5, a light receiving band wavelength of a light wave that can pass at that time is selectively set based on the active mode transmission / reception switching signal S2 from the timing generation unit 1a. More specifically, in the active measurement mode, 0.7 to 1.0 μm or 1.0 to 1.0 μm
The light receiving band wavelength in the same wavelength region as the transmission band wavelength selected and set between 1.3 μm is selected and set. Also,
In the passive measurement mode, 3 to 3.5 μm or 4 to 5 μm according to the wavelength of the infrared light emitted by the object of the target W.
Is selected and set as the reception band wavelength.
【００２５】受光部６は、受光面が１つの例えば単一の
Ｓｉ素子で構成され、光学帯域可変フィルタ部５で選択
設定された受光帯域波長の光波を受光検出し、その光波
に対応した電気信号を信号処理部７に出力している。The light receiving section 6 has a single light receiving surface, for example, a single Si element. The light receiving section 6 receives and detects a light wave having a light receiving band wavelength selected and set by the optical band variable filter section 5, and detects an electric wave corresponding to the light wave. The signal is output to the signal processing unit 7.
【００２６】信号処理部７は、受光部６からの電気信号
に基づいて目標Ｗの物体までの距離、方位、角度等を演
算している。The signal processing unit 7 calculates the distance, azimuth, angle, and the like to the target W object based on the electric signal from the light receiving unit 6.
【００２７】そして、上記のように構成された計測装置
では、送受切換指令部１ａに予め設定された制御シーケ
ンスの指示に基づくタイミング発生部１ｂからのタイミ
ング信号により、レーザ送信部２および光学帯域可変フ
ィルタ部５を特定の状態に設定し、指定された波長領域
のアクティブ計測またはパッシブ計測を行ない、以下連
続した送受切換指令部１ａの制御シーケンスに従って、
指定された異なる波長領域のアクティブ計測またはパッ
シブ計測を時分割に行なっている。In the measuring device configured as described above, the laser transmission unit 2 and the optical band variable unit are controlled by the timing signal from the timing generation unit 1b based on the instruction of the control sequence preset in the transmission / reception switching command unit 1a. The filter unit 5 is set to a specific state, performs active measurement or passive measurement in a specified wavelength region, and performs a continuous transmission / reception switching command unit 1a according to a control sequence.
Active measurement or passive measurement in a specified different wavelength region is performed in a time sharing manner.
【００２８】さらに説明すると、まず、送受切換指令部
１ａの指令によりタイミング発生部１ｂよりアクティブ
／パッシブ切換指令信号Ｓ１ａが出力されると、アクテ
ィブ計測モード状態に設定される。アクティブ計測モー
ド状態において、アクティブモード送受切換信号Ｓ２ａ
が出力されると、送信状態に設定されてレーザ送信部２
がレーザ送信器２ａに切り換えられるとともに、光学帯
域可変フィルタ部５の受信帯域波長がレーザ送信器２ａ
と同一波長に設定される。More specifically, when an active / passive switching command signal S1a is output from the timing generator 1b in response to a command from the transmission / reception switching command unit 1a, the active measurement mode is set. In the active measurement mode state, the active mode transmission / reception switching signal S2a
Is output, the transmission state is set and the laser transmission unit 2
Is switched to the laser transmitter 2a, and the reception band wavelength of the optical band variable filter unit 5 is changed to the laser transmitter 2a.
And the same wavelength.
【００２９】上記設定が終了すると、アクティブモード
レーザ送信指令信号Ｓ３によりレーザ送信器２ａが作動
し、光波分岐部３を介して装置外部の目標Ｗの物体に向
けてレーザ光を発射する。次に、アクティブモード送受
切換信号Ｓ２ｂが出力されると、レーザ光の発射に伴っ
て装置外部の目標Ｗの物体より反射して戻ってくる光波
が集光レンズ部４で集光される。集光された光波は、光
波分岐部３を介して光学帯域可変フィルタ部５に導かれ
る。光学帯域可変フィルタ部５では、選択設定された受
光帯域波長の光波のみを通過させる。この通過した光波
は、受光部６にて受光検出される。そして、受光検出さ
れた光波は、電気信号に変換された後、信号処理部７に
おいて信号処理され、目標までの距離、方位、角度等が
演算される。When the above setting is completed, the laser transmitter 2a operates in response to the active mode laser transmission command signal S3, and emits a laser beam toward the target W object outside the apparatus via the light wave branching unit 3. Next, when the active mode transmission / reception switching signal S2b is output, the light wave reflected and returned from the object of the target W outside the apparatus with the emission of the laser light is collected by the collection lens unit 4. The collected light wave is guided to the optical band variable filter unit 5 via the light wave branching unit 3. The optical band variable filter unit 5 allows only the lightwave of the wavelength of the light receiving band selected and set to pass. The transmitted light wave is received and detected by the light receiving unit 6. Then, the lightwave detected and received is converted into an electric signal, and then subjected to signal processing in the signal processing unit 7 to calculate a distance, a direction, an angle, and the like to the target.
【００３０】次に、送受切換指令部１ａの指令によりタ
イミング発生部１ｂよりアクティブ／パッシブ切換指令
信号Ｓ１ｂが出力されると、パッシブ計測モードに切換
設定され、パッシブ受信状態となる。このとき、光学帯
域可変フィルタ部５の受光帯域波長は、目標Ｗの物体が
放射する赤外線の波長に応じて３〜５μｍの間の所望の
値に選択設定される。設定が終了すると、目標Ｗの物体
が放射する例えば赤外線による光波を集光レンズ部４で
集光する。集光された光波は、光波分岐部３を介して光
学帯域可変フィルタ部５に導かれる。光学帯域可変フィ
ルタ部５では、選択設定された受光帯域波長の光波のみ
を通過させる。この通過した光波は、受光部６にて受光
検出される。そして、受光検出された光波は、電気信号
に変換された後、信号処理部７において信号処理され、
目標までの距離、方位、角度等が演算される。Next, when an active / passive switching command signal S1b is output from the timing generating section 1b in response to a command from the transmission / reception switching command section 1a, the mode is switched to the passive measurement mode, and the apparatus enters the passive receiving state. At this time, the light receiving band wavelength of the optical band variable filter unit 5 is selected and set to a desired value between 3 and 5 μm according to the wavelength of the infrared light emitted from the target W object. When the setting is completed, the light wave of, for example, infrared rays emitted from the object of the target W is collected by the condenser lens unit 4. The collected light wave is guided to the optical band variable filter unit 5 via the light wave branching unit 3. The optical band variable filter unit 5 allows only the lightwave of the wavelength of the light receiving band selected and set to pass. The transmitted light wave is received and detected by the light receiving unit 6. Then, the lightwave detected and received is converted into an electric signal, and then subjected to signal processing in a signal processing unit 7.
The distance, azimuth, angle, etc. to the target are calculated.
【００３１】以下、上述した動作を送受切換指令部１ａ
の指令に基づくタイミング発生部１ｂのタイミング信号
によって異なる複数波長領域全てのアクティブ計測とパ
ッシブ計測を時分割に行なう。Hereinafter, the above-mentioned operation is performed by the transmission / reception switching command section 1a.
The active measurement and the passive measurement are performed in a time-division manner in all of a plurality of different wavelength regions according to the timing signal of the timing generation unit 1b based on the above-mentioned command.
【００３２】従って、上述した実施例では、送受切換指
令部１ａの指令によるタイミング発生部１ｂからのタイ
ミング信号により、アクティブ計測する場合には、複数
の中から所望の送信帯域波長によるレーザ送信器（２ａ
〜２ｎのいずれか）を選択設定し、ビームスプリッタに
よる光波分岐部３を介してレーザ光を目標Ｗの物体に発
射させ、これに伴って反射してくる光波を光波分岐部３
を介してレーザ送信器（２ａ〜２ｎのいずれか）と同一
の受光帯域波長に設定された光学帯域可変フィルタ部５
に導き受光部６で受光検出し、パッシブ計測する場合に
は、目標Ｗの物体から放射される赤外線に応じて光学帯
域可変フィルタ部５の受光帯域波長を選択設定し、レー
ザ送信部２からのレーザ光の発射を停止した状態で目標
Ｗからの光波を光波分岐部３を介して光学帯域可変フィ
ルタ部５に導き受光部６で受光検出する構成なので、集
光レンズ部４により集光された光量を大きく損なうこと
なく、時分割によるアクティブ計測とパッシブ計測を両
立させて光波領域の複数波長帯にわたる計測を行なうこ
とができる。また、こうした計測装置は、光学系を除く
部分を簡素な電子回路で構成でき、受光部６も受光面が
１つの単一の素子で構成できるので、特に大きな収納面
積を取らず、制約された場所、例えば飛しょう体に簡単
に収納することができる。Therefore, in the above-described embodiment, when active measurement is performed based on a timing signal from the timing generation section 1b in accordance with a command from the transmission / reception switching command section 1a, a laser transmitter with a desired transmission band wavelength from among a plurality of laser transmitters ( 2a
To 2n), and the laser beam is emitted to the object of the target W via the light wave branching unit 3 by the beam splitter, and the light wave reflected thereby is reflected by the light wave branching unit 3
Optical band variable filter unit 5 set to the same light receiving band wavelength as the laser transmitter (any of 2a to 2n) via
In the case of performing passive measurement by detecting the light received by the light receiving unit 6 and performing the passive measurement, the light receiving band wavelength of the optical band variable filter unit 5 is selectively set according to the infrared light radiated from the object of the target W. Since the light wave from the target W is guided to the optical band variable filter unit 5 through the light wave branching unit 3 and the light is detected by the light receiving unit 6 while the emission of the laser light is stopped, the light wave is collected by the light collecting lens unit 4. It is possible to perform measurement over a plurality of wavelength bands in a light wave region by simultaneously performing active measurement and passive measurement by time division without significantly impairing the light amount. In addition, in such a measuring device, the portion excluding the optical system can be constituted by a simple electronic circuit, and the light receiving section 6 can be constituted by a single light receiving surface. It can be easily stored in a place, for example, a flying object.
【００３３】ところで、上述した実施例では、異なる複
数波長領域のアクティブ計測と、異なる複数波長領域の
パッシブ計測を時分割に行なう場合について説明した
が、以下の（１）〜（３）に示す構成としてもよい。In the above-described embodiment, a case has been described in which active measurement in a plurality of different wavelength regions and passive measurement in a different plurality of wavelength regions are performed in a time-division manner. The following configurations (1) to (3) are provided. It may be.
【００３４】（１）単一の波長領域のアクティブ計測
と、単一の波長領域のパッシブ計測を時分割に行なうよ
うに、レーザ送信部２を単一の波長領域とし、光学帯域
可変フィルタ部５はアクティブ計測およびパッシブ計測
時において、単一の波長領域で通過可能とする。(1) The laser transmission unit 2 has a single wavelength region and the optical band variable filter unit 5 has a single wavelength region so that active measurement in a single wavelength region and passive measurement in a single wavelength region are performed in a time-division manner. Can pass in a single wavelength range during active measurement and passive measurement.
【００３５】（２）異なる複数波長領域のアクティブ計
測と、単一の波長領域のパッシブ計測を時分割に行なう
ように、レーザ送信部２を異なる波長領域で複数備え、
光学帯域可変フィルタ部５はアクティブ計測時にレーザ
送信部２と同じ複数波長領域で通過可能とし、パッシブ
計測時においては、単一の波長領域で通過可能とする。(2) A plurality of laser transmitters 2 are provided in different wavelength regions so that active measurement in different wavelength regions and passive measurement in a single wavelength region are performed in a time sharing manner.
The optical band variable filter unit 5 allows transmission in the same plurality of wavelength regions as the laser transmission unit 2 during active measurement, and allows transmission in a single wavelength region during passive measurement.
【００３６】（３）単一の波長領域のアクティブ計測
と、異なる複数波長のパッシブ計測を時分割に行なうよ
うに、レーザ送信部２を単一の波長領域とし、光学帯域
可変フィルタ部５はアクティブ計測時に単一の波長領域
で通過可能とし、パッシブ計測時においては、レーザ送
信部２と同じ複数波長領域で通過可能とする。(3) The laser transmitting unit 2 is set to a single wavelength region, and the optical band variable filter unit 5 is set to an active band so that active measurement in a single wavelength region and passive measurement of a plurality of different wavelengths are performed in a time sharing manner. At the time of measurement, light can pass through a single wavelength region, and at the time of passive measurement, light can pass through the same plurality of wavelength regions as the laser transmitter 2.
【００３７】また、上記実施例では、光波分岐部３、集
光レンズ部４、光学帯域可変フィルタ部５および受光部
６をアクティブ計測およびパッシブ計測の両方の動作で
共用する構成としたが、アクティブ計測とパッシブ計測
の各々の動作で分けて光波分岐部３、集光レンズ部４、
光学帯域可変フィルタ部５および受光部６を備えた構成
としても同様の効果が得られる。Further, in the above embodiment, the light wave branching unit 3, the condenser lens unit 4, the optical band variable filter unit 5 and the light receiving unit 6 are shared for both the active measurement and the passive measurement. Separately for each operation of measurement and passive measurement, the light wave branching unit 3, the condenser lens unit 4,
The same effect can be obtained by using the configuration including the optical band variable filter unit 5 and the light receiving unit 6.
【００３８】さらに、上記実施例では、光学帯域可変フ
ィルタ部５を集光レンズ部４の後段に位置させている
が、集光レンズ部４の前段に光学帯域可変フィルタ部５
を位置させた構成とした場合も同様の効果が得られる。Further, in the above-described embodiment, the optical band variable filter unit 5 is located after the condenser lens unit 4, but the optical band variable filter unit 5 is located before the condenser lens unit 4.
The same effect can be obtained also in the case of a configuration in which is positioned.
【００３９】また、上記実施例では、光学帯域可変フィ
ルタ部５を送受切換指令部１ａの指令で受光帯域波長を
切り換えているが、光学帯域可変フィルタ部５が回転機
構で動作し、受光帯域波長の切り換えがその回転角の変
化で動作する場合も同様の効果が得られる。In the above embodiment, the wavelength band of the optical band variable filter 5 is switched by the command of the transmission / reception switching command unit 1a. The same effect can be obtained when the switching of the operation is performed by changing the rotation angle.
【００４０】[0040]
【発明の効果】以上のようにこの発明によれば、制約さ
れた場所、例えば飛しょう体に収納でき、集光レンズ部
により集光された光量を大きく損なうことなく、時分割
によるアクティブ方式とパッシブ方式を両立させて光波
領域の複数波長帯にわたる計測を行なうことができる。As described above, according to the present invention, the active system based on time division can be accommodated in a restricted place, for example, a flying object, without significantly impairing the amount of light condensed by the condenser lens unit. It is possible to perform measurement over a plurality of wavelength bands in the lightwave region while making the passive system compatible.
【図１】この発明に係る多波長光波計測装置の一実施例
を示す構成図FIG. 1 is a configuration diagram showing one embodiment of a multi-wavelength light wave measuring device according to the present invention.
【図２】同計測装置の信号のタイミングチャート図FIG. 2 is a timing chart of signals of the measuring device.
【図３】従来の受光面分割方式の２波長光波計測装置を
示す構成図FIG. 3 is a configuration diagram showing a conventional two-wavelength light wave measuring apparatus using a light receiving surface division method.
【図４】従来の多段受光方式の２波長光波計測装置を示
す構成図FIG. 4 is a configuration diagram showing a conventional two-wavelength light wave measuring device using a multistage light receiving method.
１…モード制御部、１ａ…送受切換指令部、１ｂ…タイ
ミング発生部、２…レーザ送信部、２ａ，２ｂ，２ｎ…
レーザ送信器、３…光波分岐部、４…集光レンズ部、５
…光学帯域可変フィルタ部（光学フィルタ部）、６…受
光部、７…信号処理部。DESCRIPTION OF SYMBOLS 1 ... Mode control part, 1a ... Transmission / reception switching instruction part, 1b ... Timing generation part, 2 ... Laser transmission part, 2a, 2b, 2n ...
Laser transmitter, 3 ... light wave branching section, 4 ... condensing lens section, 5
... optical band variable filter unit (optical filter unit), 6 ... light receiving unit, 7 ... signal processing unit.
フロントページの続き (72)発明者 關塚 清一 東京都目黒区中目黒２丁目２番地の１ 目黒独身寮 ３号室 (56)参考文献 特開 昭50−93458（ＪＰ，Ａ) 特開 平３−48790（ＪＰ，Ａ) 特開 平４−118579（ＪＰ，Ａ) 特開 平６−66939（ＪＰ，Ａ) 実開 平４−37936（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) G01S 7/00 - 17/95 G01S 3/00 - 3/86 G01V 9/04 Continuation of the front page (72) Inventor Seiichi Sekizuka 1 Meguro Singles Dormitory No. 3 at 2-2-2 Nakameguro, Meguro-ku, Tokyo (56) References JP-A-50-93458 (JP, A) JP-A-3 -48790 (JP, A) JP-A-4-118579 (JP, A) JP-A-6-66939 (JP, A) JP-A-4-37936 (JP, U) (58) Fields investigated (Int. . 6, DB name) G01S 7/00 - 17/95 G01S 3/00 - 3/86 G01V 9/04
Claims (4)
標の物体から放射される赤外線の所定波長の光波のみを
通過させる光学フィルタ部と、 該光学フィルタ部を通過した光波を受光検出する受光部
と、 前記光学フィルタ部の受光帯域波長を前記レーザ送信部
の送信帯域波長または前記目標の物体から放射される赤
外線に対応して選択的に切り換えるとともに、前記レー
ザ送信部のレーザ光の発射・停止を制御して、前記レー
ザ光に伴う前記目標の物体からの反射光を検出して計測
するアクティブ方式光波計測と、前記目標の物体より放
射される赤外線を検出して計測するパッシブ方式光波計
測とを時分割に行なうためのモード制御部とを具備した
ことを特徴とする多波長光波計測装置。A laser transmitting unit that outputs a laser beam; an optical filter unit that transmits only a light beam of a predetermined wavelength of reflected light from a target object accompanying the laser beam or infrared light emitted from the target object. A light-receiving unit that receives and detects a light wave that has passed through the optical filter unit; and a light-receiving band wavelength of the optical filter unit that is selectively corresponding to a transmission band wavelength of the laser transmission unit or infrared light emitted from the target object. In addition to switching to the active type light wave measurement to control the emission and stop of the laser light of the laser transmission unit, to detect and measure the reflected light from the target object accompanying the laser light, from the target object A multi-wavelength light wave measuring apparatus, comprising: a mode control unit for performing, in a time sharing manner, passive light wave measurement for detecting and measuring emitted infrared light.
にて複数具備し、前記光学フィルタ部の受光帯域波長
は、選択された前記レーザ送信手段の送信帯域波長と同
一波長に切り換えられ、異なる波長領域のアクティブ方
式光波計測と、単一波長領域のパッシブ方式光波計測と
を時分割に行なう請求項１記載の多波長光波計測装置。2. A laser transmission unit comprising a plurality of laser transmission units in different wavelength ranges, wherein the light receiving band wavelength of the optical filter unit is switched to the same wavelength as the selected transmission band wavelength of the laser transmission unit. 2. The multi-wavelength light wave measuring apparatus according to claim 1, wherein the active light wave measurement of the region and the passive light wave measurement of the single wavelength region are performed in a time-division manner.
にて具備し、前記光学フィルタ部の受光帯域波長は、目
標の物体より放射される赤外線に応じた複数の波長領域
に切り換えられ、単一波長領域のアクティブ方式光波計
測と、異なる波長領域のパッシブ方式光波計測とを時分
割に行なう請求項１記載の多波長光波計測装置。3. The laser transmission means is provided in a single wavelength range, and a light receiving band wavelength of the optical filter unit is switched to a plurality of wavelength ranges according to infrared rays emitted from a target object. 2. The multi-wavelength light wave measuring apparatus according to claim 1, wherein the active light wave measurement in a single wavelength region and the passive light wave measurement in different wavelength regions are performed in a time division manner.
にて複数具備し、前記光学フィルタ部の受光帯域波長
は、目標の物体より放射される赤外線に応じた複数の波
長領域に切り換えられ、異なる波長領域のアクティブ方
式光波計測と、異なる波長領域のパッシブ方式光波計測
とを時分割に行なう請求項１記載の多波長光波計測装
置。4. The laser transmitting means includes a plurality of laser transmitting means in different wavelength ranges, and a light receiving band wavelength of the optical filter section is switched to a plurality of wavelength ranges corresponding to infrared rays emitted from a target object to be different. 2. The multi-wavelength light wave measuring apparatus according to claim 1, wherein the active light wave measurement in the wavelength region and the passive light wave measurement in different wavelength regions are performed in a time division manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21296794A JP2876518B2 (en) | 1994-09-06 | 1994-09-06 | Time-division multi-wavelength lightwave measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21296794A JP2876518B2 (en) | 1994-09-06 | 1994-09-06 | Time-division multi-wavelength lightwave measurement device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0875853A JPH0875853A (en) | 1996-03-22 |
| JP2876518B2 true JP2876518B2 (en) | 1999-03-31 |
Family
ID=16631266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21296794A Expired - Lifetime JP2876518B2 (en) | 1994-09-06 | 1994-09-06 | Time-division multi-wavelength lightwave measurement device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2876518B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101566693B (en) * | 2009-05-06 | 2012-02-15 | 北京航空航天大学 | System for detecting active imaging and passive imaging of common aperture |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5072315B2 (en) * | 2006-10-23 | 2012-11-14 | 株式会社東芝 | Remote sensing device |
| KR101233402B1 (en) * | 2011-11-14 | 2013-02-15 | 동국대학교 산학협력단 | Hybrid milimeter wave image sensor with detect distance between sensor and target using single antenna |
| CN102564573B (en) * | 2011-12-29 | 2014-01-01 | 南京吉隆光纤通信股份有限公司 | Multi-wavelength laser power time division measurement method |
| KR102459040B1 (en) * | 2015-07-30 | 2022-10-26 | 엘지이노텍 주식회사 | Apparatus for detecting object |
| JP7417383B2 (en) * | 2019-08-27 | 2024-01-18 | 日本信号株式会社 | Foreign object detection system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5093458A (en) * | 1973-12-20 | 1975-07-25 |
-
1994
- 1994-09-06 JP JP21296794A patent/JP2876518B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101566693B (en) * | 2009-05-06 | 2012-02-15 | 北京航空航天大学 | System for detecting active imaging and passive imaging of common aperture |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0875853A (en) | 1996-03-22 |
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