发明名称 |
RETROREFLECTIVE ARTICLES AND DEVICES HAVING VISCOELASTIC LIGHTGUIDE |
摘要 |
Disclosed herein is an optical device having a light source, a viscoelastic lightguide and a retroreflective film suitable for retroreflecting light. Light from the light source enters the viscoelastic lightguide and is transported within the lightguide by total internal reflection. The optical device may have a “front lit” configuration such that light being transported within the lightguide is extracted and retroreflected by the film toward a viewer. The optical device may have a “back lit” configuration such that light being transported within the lightguide is extracted and transmitted through the film toward a viewer. The retroreflective film may comprise beaded retroreflective sheeting such as that used in traffic signs and markings. |
申请公布号 |
KR20110028391(A) |
申请公布日期 |
2011.03.17 |
申请号 |
KR20117003016 |
申请日期 |
2009.07.09 |
申请人 |
3M INNOVATIVE PROPERTIES COMPANY |
发明人 |
SHERMAN AUDREY A.;BOULOS MARIE A.;MEIS MICHAEL A.;SCHAFFER KEVIN R.;TRAN THU VAN T. |
分类号 |
G02B5/12 |
主分类号 |
G02B5/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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