The output beam of the 201-100 and 201-1K arc lamp housings are collimated and hence can be directly coupled to a sample chamber without any optical elements. This is because the sample chamber accepts collimated light. To couple these light sources to a sample chamber, the light source horizontal bracket is required (sold separately) to lower its optical height, but the 2” beam condensing assembly (CON2-2L) that is typically used to couple into a fiber or monochromator is not required. This 2" diameter coupling tube has no lens inside. It does have a flange on its output end to mate to the sample chamber.

The Sciencetech model CT coupling tube correctly spaces our arc lamp housing (using an f/4.5 reflector) to any of our monochromators or spectrometers. The CTC model coupling tube is for use with the 200 W source to sample chamber.