The FRC100 is a right angle transmissive near cosine corrector for measuring spectral irradiance. Featuring a diffuser made from PTFE, the FRC100 can be used from the UV to the NIR range. When compared to integrating spheres, the FRC100 provides greater optical efficiency and improved signal sensitivity over a broad spectral range. A 600 µm Fiber Patch Cord with metal sheathing is provided which connects to the SMA 905 connector on the FRC100 and to a spectrometer on the other end. A working setup would consist of an FRC100, a Spectrometer, and Irradiance Calibration.