JP6376948B2 - 光伝送体及び照明装置 - Google Patents
光伝送体及び照明装置 Download PDFInfo
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- JP6376948B2 JP6376948B2 JP2014226215A JP2014226215A JP6376948B2 JP 6376948 B2 JP6376948 B2 JP 6376948B2 JP 2014226215 A JP2014226215 A JP 2014226215A JP 2014226215 A JP2014226215 A JP 2014226215A JP 6376948 B2 JP6376948 B2 JP 6376948B2
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Landscapes
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Description
また、上記光伝送体が、チューブ状クラッド材と、該クラッド材に収容され該クラッド材よりも屈折率の高いコア材とからなり、上記クラッド材に上記微粒子が分散されていることが考えられる。
また、本発明による照明装置は、光源と、上記の光伝送体とからなるものである。
コア材3を構成する材料としては、ポリマーポリオールとしてポリオキシプロピレントリオールとポリオキシプロピレンジオールを使用し、ヒドロキシ基反応性多官能化合物としてヘキサメチレンジイソシアネートを使用する。又、クラッド材2を構成する材料としては、テトラフルオロエチレン−ヘキサフルオロプロピレン−ビニリデンフルオライド共重合体を使用する。又、微粒子としては、平均粒径500nmの六角板状の酸化亜鉛を使用する。上記のクラッド材2の材料に、0.16vol%となるように上記微粒子を混練した後に押出成形をし、φ5.0mmのチューブ形状のクラッド材2を得る。このクラッド材2をφ300mmのボビンに巻回した状態で、クラッド材2内に上記コア材3を構成する材料を混合して充填し、100℃で加熱してコア材3に非流動化処理を施す。このようにして、内側からコア材3、クラッド材2が形成されるので、この両端を切断して光伝送体1を得た。
上記微粒子について、平均粒径1000nmの六角板状の酸化亜鉛を使用した他は、上記実施例1と同様にして光伝送体1を得た。
上記微粒子について、0.036vol%とした他は、上記実施例1と同様にして光伝送体1を得た。
上記微粒子について、平均粒径300nmの六角板状の酸化亜鉛を使用した他は、上記実施例3と同様にして光伝送体1を得た。
上記微粒子について、平均粒径260nmの不定形の酸化亜鉛を使用した他は、上記実施例1と同様にして光伝送体1を得た。
上記微粒子について、使用しなかった他は、上記実施例1と同様にして光伝送体1を得た。
各試料1000mmを直線状態に配設して側面における輝度の測定を行った。光源としての白色LEDを原点とし、そこから所定の位置での側面輝度を照度計で測定して比較検証をした。実施例1、実施例2、比較例1及び比較例2の結果については図5に、実施例3及び実施例4の結果については図6に示す。
(角度による光学特性)
各試料1000mmを直線状態に配設して所定の角度での輝度の測定を行った。図3に示すように、光源5としての白色LEDを原点とし、そこから100mmの位置及び400mmの位置における光伝送体1の断面中心部を測定点とし、原点と測定点を結ぶ線から30度、60度、90度、120度及び150度の角度への放射光を分光放射計で測定した。本試験の結果については、各試料の90度における輝度を基準とし、30度、60度、120度及び150度の輝度について、この90度での輝度の値で割って、各角度における輝度変化率を求めて比較検証をした。本試験は、実施例1、比較例1及び比較例2について行い、原点から100mmの位置における試験結果については図7に、原点から400mmの位置における試験結果については図8に示す。
2 クラッド材
3 コア材
4 光透過性樹脂被覆
5 光源
Claims (3)
- 少なくとも一部に微粒子が分散されている光伝送体において、上記微粒子が、六角板状の酸化亜鉛であることを特徴とする光伝送体。
- 上記光伝送体が、チューブ状クラッド材と、該クラッド材に収容され該クラッド材よりも屈折率の高いコア材とからなり、上記クラッド材に上記微粒子が分散されていることを特徴とする請求項1記載の光伝送体。
- 光源と、請求項1又は請求項2記載の光伝送体とからなる照明装置。
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