SEPARATE OPTICAL DEVICE FOR DIRECTING LIGHT FROM AN LED
摘要
Embodiments of the present invention provide separate optical devices operable to couple to a separate LED, the separate optical device comprising an entrance surface to receive light from a separate LED when the separate optical device is coupled to the separate LED, an exit surface opposite from and a distance from the entrance surface and a set of sidewalls. The exit surface has at least a minimum area necessary to conserve brightness for a desired half-angle of light projected from the separate optical device. Furthermore, each sidewall is positioned and shaped so that at least a majority of rays having a straight transmission path from the entrance surface to that sidewall reflect to the exit surface with an angle of incidence at the exit surface at less than or equal to a critical angle at the exit surface.
申请公布号
WO2007081719(B1)
申请公布日期
2008.09.12
申请号
WO2007US00102
申请日期
2007.01.03
申请人
ILLUMITEX, INC.;DUONG, DUNG, T.;WINBERG, PAUL, N.;THOMAS, MATTHEW, R.
发明人
DUONG, DUNG, T.;WINBERG, PAUL, N.;THOMAS, MATTHEW, R.