| 摘要 |
596038 Disclosed is an annular light guide illuminator (10) for an optical scanner. The annular light guide illuminator is made of a substantially transparent material and guides light received at an entry surface (12) to an exit surface (16) for illuminating a zone (17) at its distal end (19). The illuminator further comprises a truncated-cone-shaped inner cavity (18) of which base opens onto the distal end, and of which truncated summit (20) opens onto an inner hole portion (21). The inner hole may be adapted to receive an optical device (30) to collect light from the illuminated zone which is reflected back through the inner cavity. The exit surface of the illuminator is curved in order to irradiate the zone with a substantially uniform light intensity distribution. |
