KARL LAMBRECHT TFPC-25-340NM NARROW BAND POLARIZING CUBE TFPC BK7 25 mm 340 nm

• TFPC-25-340nm
• Clear Aperture Diameter: 25 mm
• Substrate: BK7

For a beam of light incident on a surface at normal incidence, polarization properties of the reflected and transmitted beams are described by Fresnel's equation. According to these, if angle of incidence is equal to Brewster's angle, the degree of polarization of reflected -s beam ( perpendicular to plane of incidence ) is unity. The transmitted -p ( parallel to plane of incidence ) beam is partially polarized. Polarization of the transmitted beam can be further purified by successive films each of suitable thickness and refractive index so that Brewster's condition at each interface is met. In actual practice this does not happen which limits the performance of thin film polarizing cubes.