JP2016170968A - Luminaire - Google Patents

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JP2016170968A
JP2016170968A JP2015049783A JP2015049783A JP2016170968A JP 2016170968 A JP2016170968 A JP 2016170968A JP 2015049783 A JP2015049783 A JP 2015049783A JP 2015049783 A JP2015049783 A JP 2015049783A JP 2016170968 A JP2016170968 A JP 2016170968A
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light
white
wavelength conversion
light source
infrared light
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尚子 竹井
Naoko Takei
尚子 竹井
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Panasonic Intellectual Property Management Co Ltd
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Panasonic Intellectual Property Management Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To sufficiently illuminate a monitoring object by infrared light, in a warehouse, a factory and the like.SOLUTION: A luminaire 1 includes: a light source part 2 having a white LED 21 for emitting white light; and a wavelength conversion part 3 constituted as a separate body from the light source part 2, and for converting the white light from the white LED 21 into infrared light. In this constitution, as the white light from the white LED 21 which has light emission intensity higher than a general infrared LED and which hardly deteriorates is converted into the infrared light, the infrared light with high luminance can be emitted stably for a long period of time. Thereby, in a warehouse, a factory and the like, a monitoring object can be sufficiently illuminated by the infrared light.SELECTED DRAWING: Figure 1

Description

本発明は、赤外光を出射する照明装置に関する。   The present invention relates to an illumination device that emits infrared light.

従来から、倉庫や工場等において、防犯及び監視の目的から監視カメラ等の監視装置を設けることが行われている。このような監視装置は、照明が点灯され照度が高い状況又は日中ではカラー画像での撮影を行い、照明が消灯され照度が低い状況又は夜間では監視物から放射される赤外光を検知して白黒画像での撮影を行う。しかしながら、監視物から放射される赤外光が少ない場合には、監視物を鮮明に撮影できないことがある。そこで、監視装置に赤外光を出射する赤外ＬＥＤを組み込んだ照明装置を更に設け、この赤外ＬＥＤから出射され監視物によって反射された赤外光を検知することで、監視物の鮮明な画像を得ることが考えられる（例えば、特許文献1参照）。   2. Description of the Related Art Conventionally, in a warehouse, a factory or the like, a monitoring device such as a monitoring camera has been provided for crime prevention and monitoring purposes. Such a monitoring device takes a color image when the illumination is on and the illumination is high or in the daytime, and detects infrared light emitted from the monitoring object when the illumination is off and the illumination is low or at night. To take black and white images. However, when the infrared light emitted from the monitored object is small, the monitored object may not be photographed clearly. Therefore, the monitoring device is further provided with an illumination device incorporating an infrared LED that emits infrared light, and by detecting infrared light emitted from the infrared LED and reflected by the monitoring object, the monitoring object can be clearly displayed. It is conceivable to obtain an image (see, for example, Patent Document 1).

特開２００５−４９７１９号公報JP 2005-49719 A

しかしながら、上述したような照明装置では、赤外ＬＥＤから出射される赤外光の輝度が低い上に赤外ＬＥＤが使用に伴って劣化しやすいので、赤外光により監視物を十分に照明することができない虞がある。   However, in the illumination device as described above, the brightness of the infrared light emitted from the infrared LED is low, and the infrared LED easily deteriorates with use. There is a possibility that it cannot be done.

本発明は、上記課題を解決するものであって、倉庫や工場等において、赤外光により監視物を十分に照明することができる照明装置を提供することを目的とする。   The present invention solves the above-described problem, and an object of the present invention is to provide an illuminating device that can sufficiently illuminate a monitored object with infrared light in a warehouse, a factory, or the like.

本発明の照明装置は、白色光を出射する白色ＬＥＤを有する光源部と、前記光源部とは別体として構成され前記白色ＬＥＤからの白色光を赤外光に変換する波長変換部と、を備えたことを特徴とする。   The illumination device of the present invention includes a light source unit having a white LED that emits white light, and a wavelength conversion unit that is configured separately from the light source unit and converts white light from the white LED into infrared light. It is characterized by having.

本発明によれば、一般的な赤外ＬＥＤよりも高い発光強度を有し且つ劣化し難い白色ＬＥＤからの白色光を赤外光に変換するので、高輝度な赤外光を長期間に亘って安定的に出射することができる。これにより、倉庫や工場等において、赤外光により監視物を十分に照明することができる。   According to the present invention, white light from a white LED that has a higher emission intensity than a general infrared LED and hardly deteriorates is converted into infrared light. Can be emitted stably. Thereby, in a warehouse, a factory, etc., a monitoring thing can fully be illuminated with infrared light.

本発明の一実施形態に係る照明装置の断面図。Sectional drawing of the illuminating device which concerns on one Embodiment of this invention. 上記照明装置を構成する光源部から出射される白色光の分光分布図。The spectral distribution map of the white light radiate | emitted from the light source part which comprises the said illuminating device. 上記照明装置から出射される赤外光の分光分布図。The spectral distribution map of the infrared light radiate | emitted from the said illuminating device. 上記実施形態の第１の変形例に係る照明装置の断面図。Sectional drawing of the illuminating device which concerns on the 1st modification of the said embodiment. 上記照明装置において波長変換部の着脱に関わる構成を示すブロック図。The block diagram which shows the structure in connection with the attachment or detachment of the wavelength conversion part in the said illuminating device. 上記実施形態の第２の変形例に係る照明装置の断面図。Sectional drawing of the illuminating device which concerns on the 2nd modification of the said embodiment.

本発明の一実施形態に係る照明装置について図１乃至図３を参照して説明する。図１に示すように、照明装置１は、光源部２と、光源部２とは別体として構成され光源部２からの光が入射する位置に配置された波長変換部３と、を備える。   An illumination device according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the illumination device 1 includes a light source unit 2 and a wavelength conversion unit 3 that is configured separately from the light source unit 2 and is disposed at a position where light from the light source unit 2 is incident.

光源部２は、倉庫や工場等において室内空間を照明する一般照明光源として用いられるものであり、白色光を出射する白色ＬＥＤ２１と、白色ＬＥＤ２１からの白色光を白色ＬＥＤ２１の光軸Ａｘ方向に配光制御する光学部材２２と、を有する。白色ＬＥＤ２１は、青色光を出射するＬＥＤチップ２３と、ＬＥＤチップ２３からの青色光により励起されて緑色光〜赤色光を出射する蛍光体２４と、を有し、これらの光を互いに混色させることで白色光を出射する。蛍光体２４は、例えば、Ｅｕ２＋付活シリケート系蛍光体、Ｅｕ２＋付活窒化物蛍光体、Ｅｕ２＋付活酸窒化物蛍光体又はＥｕ２＋付活硫化物蛍光体により構成される。光学部材２２は、図例では、断面視において椀状に形成された反射板により構成され、その底部に白色ＬＥＤ２１を配置している。反射板（光学部材）２２は、その内面に高い光反射率を有する材料、例えば、アルミニウムや銀により構成された反射面２５を有する。なお、光学部材２２は、反射板に限定されず、例えば、白色ＬＥＤ２１からの白色光を集光するレンズにより構成されていてもよい。 The light source unit 2 is used as a general illumination light source for illuminating an indoor space in a warehouse, a factory, or the like. The white LED 21 that emits white light and the white light from the white LED 21 are arranged in the optical axis Ax direction of the white LED 21. And an optical member 22 for light control. The white LED 21 has an LED chip 23 that emits blue light and a phosphor 24 that is excited by the blue light from the LED chip 23 and emits green light to red light, and these lights are mixed with each other. To emit white light. Phosphor 24 is constituted, for example, Eu 2+ -activated silicate-based phosphors, Eu 2+ activated nitride phosphor, the Eu 2+ Tsukekatsusan nitride phosphor or Eu 2+ -activated sulfide phosphor. In the illustrated example, the optical member 22 is configured by a reflector formed in a bowl shape in a cross-sectional view, and the white LED 21 is disposed on the bottom thereof. The reflection plate (optical member) 22 has a reflection surface 25 made of a material having a high light reflectance, such as aluminum or silver, on the inner surface thereof. In addition, the optical member 22 is not limited to a reflecting plate, For example, you may be comprised by the lens which condenses the white light from white LED21.

波長変換部３は、図例では、断面視において平板状に形成され、光軸Ａｘに直交した状態で反射面２５を塞ぐように配置されている。波長変換部３は、図示しない取付構造によって反射板２２に取り付けられている。波長変換部３は、基材となる透光性材料３１と、透光性材料３１の内部に分散された蛍光体３２と、を有する。透光性材料３１は、例えば、アクリル板やポリカーボネート板により構成される。蛍光体３２は、白色ＬＥＤ２１からの白色光により励起されて赤外光を出射する蛍光体、例えば、Ｎａ５（Ｙｂ，Ｎｄ）（ＭｏＯ４）４により構成される。このように構成された波長変換部３は、白色ＬＥＤ２１からの白色光を赤外光に変換して出射する。 In the illustrated example, the wavelength conversion unit 3 is formed in a flat plate shape in a cross-sectional view, and is disposed so as to close the reflection surface 25 in a state orthogonal to the optical axis Ax. The wavelength conversion unit 3 is attached to the reflection plate 22 by an attachment structure (not shown). The wavelength conversion unit 3 includes a translucent material 31 serving as a base material, and a phosphor 32 dispersed inside the translucent material 31. The translucent material 31 is composed of, for example, an acrylic plate or a polycarbonate plate. The phosphor 32 is composed of a phosphor that is excited by white light from the white LED 21 and emits infrared light, for example, Na 5 (Yb, Nd) (MoO 4 ) 4 . The wavelength conversion unit 3 configured in this way converts white light from the white LED 21 into infrared light and emits it.

図２に示すように、白色ＬＥＤ２１から出射される白色光は、ＬＥＤチップ２３から出射され波長略４５０ｎｍにピークを有する青色光と、蛍光体２４から出射され波長略５６０ｎｍにピークを有する緑色光〜赤色光と、を含む。この緑色光〜赤色光のうち波長域５８０ｎｍ〜６２０ｎｍの光は、蛍光体３２を効率良く励起する。   As shown in FIG. 2, the white light emitted from the white LED 21 includes blue light emitted from the LED chip 23 and having a peak at a wavelength of about 450 nm, and green light emitted from the phosphor 24 and having a peak at a wavelength of about 560 nm. Red light. Of the green light to red light, light having a wavelength range of 580 nm to 620 nm excites the phosphor 32 efficiently.

一方、図３に示すように、波長変換部３の蛍光体３２から出射される赤外光は、波長略９８５ｎｍに最大ピークを有する。このような赤外光は、蛍光体３２が白色ＬＥＤ２１から出射される波長域５８０ｎｍ〜６２０ｎｍの光によって効率良く励起されるので、効果的に生み出される。   On the other hand, as shown in FIG. 3, the infrared light emitted from the phosphor 32 of the wavelength conversion unit 3 has a maximum peak at a wavelength of about 985 nm. Such infrared light is effectively generated because the phosphor 32 is efficiently excited by light having a wavelength range of 580 nm to 620 nm emitted from the white LED 21.

上記のように構成された照明装置１によれば、一般的な赤外ＬＥＤよりも高い発光強度を有し且つ劣化し難い白色ＬＥＤ２１からの白色光を波長変換部３によって赤外光に変換するので、高輝度な赤外光を長期間に亘って安定的に出射することができる。これにより、照明装置１を倉庫や工場等の室内空間に設置した場合に、室内空間に存在する監視物を赤外光によって十分に照明することができるので、暗所において該監視物から反射されてきた赤外光を監視装置で検知すると広範囲に鮮明な画像を得ることができる。   According to the illuminating device 1 configured as described above, the wavelength conversion unit 3 converts white light from the white LED 21 that has higher emission intensity than a general infrared LED and is less likely to deteriorate into infrared light. Therefore, high-intensity infrared light can be stably emitted over a long period of time. As a result, when the lighting device 1 is installed in an indoor space such as a warehouse or a factory, the monitoring object existing in the indoor space can be sufficiently illuminated with infrared light, so that it is reflected from the monitoring object in a dark place. When the infrared light is detected by the monitoring device, a clear image can be obtained over a wide range.

次に、上記実施形態の第１の変形例に係る照明装置について図４及び図５を参照して説明する。図４に示すように、照明装置１１では、波長変換部３が光源部２に対して着脱自在となっており、図例では、光軸Ａｘに直交する方向にスライド着脱することができるように構成されている。波長変換部３を光源部２の側方にスライドさせて反射面２５を露出させると、光源部２からの白色光が外部に照射される。このように波長変換部３をスライド着脱することで、白色光を出射するパターンと赤外光を出射するパターンとの２パターンで照明装置１１を使用することができる。これにより、１つの照明装置１１を昼間は白色光を出射する一般照明として用い、夜間は赤外光を出射する監視装置用の光源として用いることができる。   Next, an illumination device according to a first modification of the above embodiment will be described with reference to FIGS. As shown in FIG. 4, in the illuminating device 11, the wavelength conversion unit 3 is detachable from the light source unit 2, and in the example shown in FIG. It is configured. When the wavelength conversion unit 3 is slid to the side of the light source unit 2 to expose the reflection surface 25, white light from the light source unit 2 is irradiated to the outside. By detaching the wavelength conversion unit 3 in this way, the illuminating device 11 can be used in two patterns: a pattern that emits white light and a pattern that emits infrared light. Thus, one illumination device 11 can be used as general illumination that emits white light in the daytime and can be used as a light source for a monitoring device that emits infrared light at night.

図５に示すように、波長変換部３のスライド移動は、制御部４により制御される。制御部４は、波長変換部３をスライド移動させる駆動部４１と、駆動部４１に動作指示を出す指示部４２と、を有する。また、制御部４は、指示部４２に駆動部４１への指示出しタイミングを与えるための人感センサ４３及びタイマ４４と、駆動部４１への指示出しに連動して指示部４２により動作制御される監視カメラ等の監視装置４５と、を有する。   As shown in FIG. 5, the slide movement of the wavelength conversion unit 3 is controlled by the control unit 4. The control unit 4 includes a drive unit 41 that slides the wavelength conversion unit 3 and an instruction unit 42 that issues an operation instruction to the drive unit 41. In addition, the control unit 4 is controlled in operation by the instruction unit 42 in conjunction with the human sensor 43 and the timer 44 for giving the instruction unit 42 an instruction output timing to the drive unit 41 and the instruction to the drive unit 41. And a monitoring device 45 such as a monitoring camera.

駆動部４１は、例えば、ラックアンドピニオン機構を有し、指示部４２からの指示に従って波長変換部３を光源部２に着脱する。指示部４２は、マイコン等を有し、例えば、人感センサ４３が人を検知しているときには波長変換部３を光源部２から取り外し、人感センサ４３が人を検知していないときには波長変換部３を光源部２に装着するよう駆動部４１に指示を出す。また、指示部４２は、例えば、タイマ４４に予め設定された時刻が来たときに、波長変換部３を光源部２に着脱するよう駆動部４１に指示を出す。更に、指示部４２は、波長変換部３が光源部２に装着されているときには監視物からの赤外光を検知して白黒画像での撮影を行い、且つ波長変換部３が光源部２から取り外されているときにはカラー画像での撮影を行うように監視装置４５に指示を出す。なお、波長変換部３のスライド移動は、このような自動制御に限定されず、手動で行われてもよい。   The drive unit 41 has, for example, a rack and pinion mechanism, and attaches / detaches the wavelength conversion unit 3 to / from the light source unit 2 in accordance with an instruction from the instruction unit 42. The instruction unit 42 includes a microcomputer or the like. For example, the wavelength conversion unit 3 is detached from the light source unit 2 when the human sensor 43 detects a person, and wavelength conversion is performed when the human sensor 43 does not detect a person. The drive unit 41 is instructed to attach the unit 3 to the light source unit 2. The instruction unit 42 instructs the drive unit 41 to attach / detach the wavelength conversion unit 3 to / from the light source unit 2 when, for example, a time set in advance in the timer 44 comes. Further, the instruction unit 42 detects the infrared light from the monitoring object when the wavelength conversion unit 3 is attached to the light source unit 2 and shoots a black and white image, and the wavelength conversion unit 3 receives the light from the light source unit 2. When it is removed, the monitoring device 45 is instructed to take a color image. The sliding movement of the wavelength conversion unit 3 is not limited to such automatic control, and may be performed manually.

次に、上記実施形態の第２の変形例に係る照明装置について図６を参照して説明する。照明装置１２では、波長変換部３の光出射面３３を覆うようにしてフィルタ５が設けられている。フィルタ５は、可視光を反射させて赤外光を透過させる赤外光透過フィルタにより構成されている。このようにすることで、波長変換部３において波長変換しきれなかった光源部２からの白色光（可視光）が、外部に漏れなくなる。これにより、例えば、照明装置１２を人工光により植物を育成する植物工場に設置して、夜間に監視装置用の光源として用いた場合に、照明装置１２から漏れ出した可視光によって植物の生育に悪影響が出るのを防止することができる。   Next, an illumination device according to a second modification of the above embodiment will be described with reference to FIG. In the illuminating device 12, the filter 5 is provided so as to cover the light emitting surface 33 of the wavelength conversion unit 3. The filter 5 is configured by an infrared light transmission filter that reflects visible light and transmits infrared light. By doing in this way, the white light (visible light) from the light source part 2 which was not able to carry out wavelength conversion in the wavelength conversion part 3 does not leak outside. Thereby, for example, when the lighting device 12 is installed in a plant factory that grows plants with artificial light and is used as a light source for a monitoring device at night, the plant grows by visible light leaking from the lighting device 12. An adverse effect can be prevented.

なお、本発明に係る照明装置は、上記実施形態及びその変形例に限定されず種々の変形が可能である。例えば、波長変換部は、フィルム状に形成されてシャッター式に光源部に対して着脱自在となっていてもよい。更に、波長変換部に含まれる蛍光体を効率良く励起するために、光源部に波長域５８０ｎｍ〜６２０ｎｍの光を出射するＬＥＤを別に設けてもよい。   In addition, the illumination device according to the present invention is not limited to the above-described embodiment and its modifications, and various modifications can be made. For example, the wavelength conversion unit may be formed in a film shape and detachable from the light source unit in a shutter manner. Furthermore, in order to efficiently excite the phosphor contained in the wavelength conversion unit, an LED that emits light in the wavelength region of 580 nm to 620 nm may be separately provided in the light source unit.

１、１１、１２ 照明装置
２ 光源部
２１ 白色ＬＥＤ
３ 波長変換部
３２ （赤外光を出射する）蛍光体
３３ 波長変換部の光出射面
５ フィルタ 1, 11, 12 Illumination device 2 Light source unit 21 White LED
3 Wavelength conversion unit 32 Phosphor 33 (emits infrared light) Light exit surface 5 of wavelength conversion unit Filter

Claims (4)

白色光を出射する白色ＬＥＤを有する光源部と、前記光源部とは別体として構成され前記白色ＬＥＤからの白色光を赤外光に変換する波長変換部と、を備えたことを特徴とする照明装置。   A light source unit having a white LED that emits white light, and a wavelength conversion unit that is configured separately from the light source unit and converts white light from the white LED into infrared light. Lighting device. 前記波長変換部は、前記光源部に対して着脱自在となっていることを特徴とする請求項１に記載の照明装置。   The illumination device according to claim 1, wherein the wavelength conversion unit is detachable from the light source unit. 前記波長変換部の光出射面を覆うように設けられたフィルタを更に備え、
前記フィルタは、可視光を反射させて赤外光を透過させることを特徴とする請求項１又は請求項２に記載の照明装置。 A filter provided to cover the light exit surface of the wavelength converter;
The illumination device according to claim 1, wherein the filter reflects visible light and transmits infrared light. 前記光源部は、波長域５８０ｎｍ〜６２０ｎｍの光を出射し、
前記波長変換部は、前記波長域の光によって励起されて赤外光を出射する蛍光体を有することを特徴とする請求項１乃至請求項３のいずれか一項に記載の照明装置。 The light source unit emits light having a wavelength range of 580 nm to 620 nm,
4. The illumination device according to claim 1, wherein the wavelength conversion unit includes a phosphor that is excited by light in the wavelength region and emits infrared light. 5.
JP2015049783A 2015-03-12 2015-03-12 Luminaire Pending JP2016170968A (en)

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