| 摘要 |
<p>The invention provides an optical collection device (26) comprising a first stage optical concentrating device (34) and a second stage optical collection unit (40) having a housing (42) and an array of individual light collecting elements (46) in the housing. The array of light collecting elements provide, in combination, a light entrance and a light exit, each light collecting element having a light entrance aperture (62), a light exit aperture (64), and a light collecting region (44) extending between the entrance aperture and the exit aperture. The light collecting region provides a tapering light reflecting surface (66) arranged to direct light received at the entrance aperture towards the exit aperture. The invention also provides an optical receiver (20) comprising such an optical collection device and having at least one detecting element (24, 72, 74) arranged behind the light exit apertures to detect light transmitted by the optical collection unit.</p> |
