G - Physics – 01 – N
Patent
G - Physics
01
N
73/0.5
G01N 21/00 (2006.01) A61B 5/00 (2006.01) G01N 21/27 (2006.01) G01N 37/00 (2006.01) G01N 21/31 (2006.01)
Patent
CA 2016573
A calibration device is provided for in vitro calibration of a light guide. The calibration device has a surface defining a cavity having an open end and a closed end opposite the open end. The opening is sized to receive the end portion of a light guide and a stop is provided near the closed end to prevent the light guide from contacting the inner surface of the closed end and to define an air gap between the end face of the light guide and the inner surface of the closed end. The inner surface of the closed end is flat and perpendicular to the longitudinal axis of the light guide. The light guide directs light from the end face of the light guide across the gap and against the flat surface. The calibration device is formed of a suitable material, such as polyethylene, with a plurality of light scattering particles and a plurality of light absorbing particles having neutral density filter properties uniformly distributed therein. Preferred light absorbing particles that have the properties of a neutral density filter are carbon black.
Edwards Lifesciences Corporation
Sim & Mcburney
LandOfFree
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