A fluorescent dyed polymer member and a light source are structurally arranged in a manner to efficiently gather light from the light source and then transmit the gathered light to a light utilization device. Light from the light source is gathered over a large area that is occupied by the polymer member. This gathered light is transmitted through the polymer member to an edge portion thereof having a relatively small light emitting area. Light is then emitted as an external beam having a cross section that corresponds to the physical shape of the edge of the polymer member, for example a straight of linear footprint of light. The area brightness of this external beam is greater than the area brightness of the initial light source.
申请公布号
US5128846(A)
申请公布日期
1992.07.07
申请号
US19900602036
申请日期
1990.10.23
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
MILLS, ROSS N.;REEVES-JANZEN, CYNTHIA F.;RIES, MICHAEL D.;SCOTT, JOHN C.