The PIKE 80Spec (L1272248) is a grazing angle specular reflection accessory that measures thin films and monolayers. Features include: A fixed 80° angle of incidence Polarizer mounts for optional IR polarizers (L1272376, L1272243) Gold-coated reflective optics for highest energy throughput It is compatible with Spectrum One/100/400/65, Spectrum Two, and Spectrum 3/Frontier spectrometers.