The LBTEK Laser Line Polarizing Beamsplitter Cube consists of two UV fused silica right-angle prisms, with a dielectric beamsplitter coating that reflects S-polarized light and transmits P-polarized light. All four sides of the cube can serve as incident surfaces to separate P-polarized and S-polarized light. For optimal polarization performance, it is recommended that the incident light enters from the right-angle side of the prism coated with the polarizing beamsplitter film (the prism marked with a black dot on top indicates that its hypotenuse is coated with the dielectric polarizing beamsplitter film). The extinction ratio of the laser line polarizing beamsplitter cube is Tp:Ts > 3000:1, and all four light-transmitting surfaces are coated with V-type anti-reflection coatings designed for the single wavelength. The reflectance of the anti-reflection coating is less than 0.25% at the design wavelength. LBTEK offers 10 design wavelength options of 405 nm, 532 nm, 633 nm, 780 nm, 808 nm, 830 nm, 850 nm, 1030 nm, 1064 nm, and 1550 nm. Custom services for other design wavelengths and special sizes are available. For customization needs, please contact the technical support.