Patent ID: 6542231
Filing Date: 2003-04-01
Classification: G01N,G02B

Abstract:
A fiber optic coupled light pipe for a liquid sample analyzer comprising:a light pipe formed of a low refractive index material having a core diameter of predetermined size, an input optical fiber with a core diameter equal to or less than the core diameter of the light pipe core for introducing light into the light pipe, the end of said optical fiber being positioned relative to said light pipe so that light from the optical fiber core is accepted by the light pipe core, an output optical fiber with a core diameter equal to or greater than the core diameter to the light pipe core for receiving light from the input fiber transmitted along the light pipe, said input fiber having a numerical aperture less than or equal to the numerical aperture of the light pipe, said output fiber having a numerical aperture greater than or equal to the numerical aperture of the light pipe.