Beamsplitter Plate are usually used tilted at a 45 ° angle. The front surface is coated with a spectral film that can divide the incident light according to a specific ratio, while the back surface is coated with an anti reflective film to reduce interference and ghosting effects between beams and improve the overall performance of the optical system. By adjusting the thickness, material, and structure of the film layer, the reflection and transmission ratios can be precisely controlled to meet different application requirements.