JP5000028B2 - 広帯域赤外光放射装置 - Google Patents
広帯域赤外光放射装置 Download PDFInfo
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- 230000005855 radiation Effects 0.000 title description 2
- 239000011521 glass Substances 0.000 claims description 228
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 175
- 230000005284 excitation Effects 0.000 claims description 65
- 239000004065 semiconductor Substances 0.000 claims description 54
- 150000002500 ions Chemical class 0.000 claims description 15
- 239000011159 matrix material Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 description 28
- 239000000843 powder Substances 0.000 description 22
- -1 rare earth ions Chemical class 0.000 description 14
- 229910052761 rare earth metal Inorganic materials 0.000 description 13
- 229910015902 Bi 2 O 3 Inorganic materials 0.000 description 12
- 238000000295 emission spectrum Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 10
- 238000002844 melting Methods 0.000 description 10
- 230000008018 melting Effects 0.000 description 10
- 239000000758 substrate Substances 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 230000004048 modification Effects 0.000 description 7
- 238000012986 modification Methods 0.000 description 7
- 229910017493 Nd 2 O 3 Inorganic materials 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000000695 excitation spectrum Methods 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000003566 sealing material Substances 0.000 description 4
- 239000008393 encapsulating agent Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229910052594 sapphire Inorganic materials 0.000 description 3
- 239000010980 sapphire Substances 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 238000000862 absorption spectrum Methods 0.000 description 2
- 239000006121 base glass Substances 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012014 optical coherence tomography Methods 0.000 description 2
- 238000004611 spectroscopical analysis Methods 0.000 description 2
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 1
- 229910005793 GeO 2 Inorganic materials 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000005383 fluoride glass Substances 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 239000000146 host glass Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000003685 thermal hair damage Effects 0.000 description 1
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Description
一方、半導体発光素子であるLED等は、ハロゲンランプと比較して、サイズが小さく、寿命が長く、特定波長領域のみの光を放出させることができるという利点があるが、光の半値幅は50nm程度と短い。
また、分光分析においても、同時に検出できる物質の数が増えるので、光源の広帯域化が求められている。特に、900〜1000nmの波長領域は、糖、脂肪、水分等に起因する吸収スペクトルが存在することから、農業・食品分野では重要であるが、特許文献1、非特許文献1から3に記載の光源ではこの波長領域の全てをカバーしきれていない。
図2に示すように、本実施形態においては、第1波長域は380nm〜440nmであり、LED素子4は、ピーク波長が405nm付近で、半値幅が15nm程度の光を発する。また、図2中の斜線は第1ガラス蛍光体51の励起帯を示し、本実施形態においては、励起帯は395nm〜415nm程度である。このように、第1ガラス蛍光体51は、第1波長域に励起帯を有することから、第1励起光λ1が入射すると蛍光を発する。
図8に示すように、この半導体発光装置101は、一対のリードフレーム102,103と、一方のリードフレーム102に搭載されるLED素子104と、LED素子104を封止する封止材としての第1ガラス蛍光体51と、第1ガラス蛍光体51を覆う第2ガラス蛍光体52と、を備えている。
2 リードフレーム
3 リードフレーム
4 LED素子
21 棒状部
22 搭載部
23 反射部
31 棒状部
32 搭載部
33 反射部
41 基板
42 半導体層
43 p電極
44 n電極
51 第1ガラス蛍光体
52 第2ガラス蛍光体
53 界面
54 レンズ形状面
55 第3ガラス蛍光体
101 半導体発光装置
102 リードフレーム
103 リードフレーム
104 LED素子
121 棒状部
122 搭載部
123 反射部
141 基板
142 半導体層
143 p電極
145 ワイヤ
201 半導体発光装置
202 メタルパターン
203 メタルパターン
206 基体
261 反射部
262 底部
301 半導体発光装置
345 ワイヤ
Claims (12)
- 第1波長域の第1励起光を発する光源と、
前記第1波長域に励起帯を有し、前記第1励起光が入射すると、第2波長域の第2励起光及び第3波長域の第1赤外光を発する第1ガラス蛍光体と、
前記第2波長域に励起帯を有し、前記第3波長域に励起帯を有さず、前記第2励起光が入射すると、前記第1赤外光を透過するとともに、第4波長域の第2赤外光を発する第2ガラス蛍光体と、を少なくとも備え、
前記第3波長域の少なくとも一部及び前記第4波長域の少なくとも一部を含む広帯域赤外光を外部へ放射する広帯域赤外光放射装置。 - 前記第3波長域は、前記第4波長域よりも短く、
前記第1ガラス蛍光体は、前記第1励起光が入射すると、前記第4波長域よりも長い第5波長域の第3赤外光を発し、
前記第2ガラス蛍光体は、前記第5波長域に励起帯を有さず、
前記広帯域赤外光は、前記第3波長域の少なくとも一部、前記第4波長域の少なくとも一部及び前記第5波長域の少なくとも一部を含む請求項1に記載の広帯域赤外光放射装置。 - 前記第1ガラス蛍光体の発光中心は、Smイオンであり、
前記第2ガラス蛍光体の発光中心は、Ybイオン及びNdイオンである請求項2に記載の広帯域赤外光放射装置。 - 前記第1波長域は、380nm〜440nmであり、
前記第2波長域は、550nm〜670nmであり、
前記第3波長域は、850nm〜970nmであり、
前記第4波長域は、950nm〜1070nmであり、
前記第5波長域は、1100nm〜1220nmである請求項3に記載の広帯域赤外光放射装置。 - 所定の波長域に励起帯を有し、所定の励起光が入射すると、第6波長域の第4赤外光を発する第3ガラス蛍光体をさらに備え、
前記広帯域赤外光は、前記第3波長域の少なくとも一部及び前記第4波長域の少なくとも一部並びに前記第6波長域の少なくとも一部を含む請求項4に記載の広帯域赤外光放射装置。 - 前記所定の波長域は、前記第2波長域、前記第3波長域、前記第4波長域及び前記前記第5波長域の少なくとも1つの波長域の少なくとも一部である請求項5に記載の広帯域赤外光放射装置。
- 前記第3ガラス蛍光体の発光中心は、Erイオンである請求項6に記載の広帯域赤外光放射装置。
- 前記第6波長域は、1450nm〜1630nmである請求項7に記載の広帯域赤外光放射装置。
- 前記光源は、半導体発光素子であり、
前記第1ガラス蛍光体は、前記半導体発光素子を封止する請求項1から8のいずれか1項に記載の広帯域赤外光放射装置。 - 前記第2ガラス蛍光体は、前記第1ガラス蛍光体を覆う請求項9に記載の広帯域赤外光放射装置。
- 前記第1ガラス蛍光体と前記第2ガラス蛍光体は、母体が同系のガラスである請求項10に記載の広帯域赤外光放射装置。
- 前記蛍光体の前記母体は、Sb2O3−B2O3系ガラスからなる請求項11に記載の広帯域赤外光放射装置。
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JP2012510831A JP5000028B2 (ja) | 2010-07-12 | 2011-07-04 | 広帯域赤外光放射装置 |
PCT/JP2011/065303 WO2012008325A1 (ja) | 2010-07-12 | 2011-07-04 | 広帯域赤外光放射装置 |
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US (1) | US9062853B2 (ja) |
EP (1) | EP2595206A4 (ja) |
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WO2012008325A1 (ja) | 2012-01-19 |
EP2595206A1 (en) | 2013-05-22 |
JPWO2012008325A1 (ja) | 2013-09-09 |
EP2595206A4 (en) | 2016-01-13 |
US9062853B2 (en) | 2015-06-23 |
US20130119280A1 (en) | 2013-05-16 |
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