METHOD FOR COUPLING LIGHT INTO A THIN PLANAR WAVEGUIDE
摘要
<p>A light distributing device (100) comprises a thin planar waveguide (10) and a waveguiding ridge (20). An incoming light beam (B1) coupled into the ridge (20) forms a second light beam (B2) waveguided in the ridge (20). The ridge (20) and the planar waveguide (10) have a common portion (23) such that light is further coupled from the side of the ridge (20) into the planar waveguide (10) through said common portion (23). Thus, optical power of a broad incoming beam (B1) may be effectively coupled to a relatively thin planar waveguide (10). The planar waveguide (10) may further comprise diffractive out-coupling elements (30) to direct light towards a display (400).</p>
申请公布号
WO2008053063(A1)
申请公布日期
2008.05.08
申请号
WO2006FI50476
申请日期
2006.11.02
申请人
NOKIA CORPORATION;SAARIKKO, PASI;LEVOLA, TAPANI;LAITINEN, PAULI