公开(公告)号：AU5472399A

公开(公告)日：2000-03-21

申请号：AU5472399

申请日：1999-08-16

Applicant: APPLIED SPECTRAL IMAGING LTD

Inventor： ADEL MICHAEL E ,  CABIB DARIO ,  WINE DAVID

IPC: G02B6/00 ,  A61B1/06 ,  A61B3/12 ,  A61B3/14 ,  G01J3/10 ,  G01J3/12 ,  G01J3/28 ,  G02B6/04 ,  A61B3/10

Abstract: A device and method for spectral imaging of an object. A plurality of sets of narrow-band light sources such as LEDs are provided. Each set emits illumination radiation in a different narrow spectral band. Each set is activated sequentially to illuminate the object. Light reflected from the object or transmitted by the object is focused on a detector array to image the object. Narrower illumination bands are provided by dispersing the emitted light using a dispersive optical element such as a diffraction grating. Alternatively; selected sets or subsets are activated simultaneously with duty cycles that emulate a preselected spectral distribution. For imaging ocular fundus tissue, the illumination light is shaped into an annular beam by an appropriately shaped waveguide.