公开(公告)号：US10180393B2

公开(公告)日：2019-01-15

申请号：US15133517

申请日：2016-04-20

Applicant: CASCADE TECHNOLOGIES HOLDINGS LIMITED

Inventor： Paul Black ,  Colin Lumsden

IPC: G01N21/31 ,  G01N21/01 ,  G01N33/00 ,  G01N21/03 ,  G01N21/3504

Abstract: An optical cell comprises first and second opposed reflecting elements, an entrance aperture in the first reflecting element and an exit aperture in the second reflecting element, wherein the entrance and exit apertures are configured such that, in operation, light introduced into the cell via the entrance aperture is reflected at least once by the second reflecting element and at least once by the first reflecting element before leaving the cell via the exit aperture.