OLAF THOMAS JOHAN ANTONIE VERMEULEN,NIGEL DAVID YOUNG,PASCAL JEAN HENRI BLOEMEN
申请号：
US16317971
公开号：
US20200008915A1
申请日:
2018.03.20
申请国别(地区):
US
年份:
2020
代理人:
摘要：
The invention relates to a mouthpiece (100) for illumination of teeth, e.g. for teeth whitening. The mouthpiece comprises a slab shaped light guide (203), at least one light source arranged for injecting light into the light guide and an optically transparent element (101) arranged to contact the light guide. The optically transparent element has a lower refractive index than the light guide to enable total internal refection of the injected light. Light is coupled out of the light guide by an out-coupling structure (210) and through a part of the optically transparent part located between the light guide and the buccal side of the teeth to illuminated the teeth with uniform light.
