公开(公告)号：US20180202926A1

公开(公告)日：2018-07-19

申请号：US15581153

申请日：2017-04-28

Applicant: CASCADE TECHNOLOGIES HOLDINGS LIMITED

Inventor： Paul BLACK ,  Ruth LINDLEY ,  Ian HOWIESON ,  Stephen WALDRON

IPC: G01N21/39 ,  G01N21/31

CPC classification number: G01N21/39 ,  G01N21/031 ,  G01N21/3151 ,  G01N21/3504 ,  G01N2021/399 ,  G01N2201/0612 ,  G01N2201/0633

Abstract: A laser detection system comprises a sample chamber configured to receive and contain a volume of sample gas, one or more lasers within at least one laser housing, wherein each laser is configured to produce a respective laser beam for excitation of one or more different materials in the sample gas and the one or more lasers are outside the sample chamber, a detector apparatus for detecting light output from the sample chamber, a first optical interface to the sample chamber having at least one window that is at least partially transparent to the laser beams from the one or more lasers, wherein the at least one laser housing is positioned in a close-coupling arrangement relative to the at least one window of the first optical interface such that, in use, the laser beams are substantially unmodified by passage between the laser housing and the at least one window.

公开(公告)号：US20170307519A1

公开(公告)日：2017-10-26

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

CPC classification number: G01N21/3103 ,  G01N21/01 ,  G01N21/031 ,  G01N21/3504 ,  G01N33/0036 ,  G01N2021/3125 ,  G01N2201/06113 ,  G01N2201/06146 ,  G01N2201/0668

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.