Prism: Prisms are blocks of optical material with flat polished sides arranged at precisely controlled angles to each other, which deflect, deviate and rotate beams of light as well as dispersing their wavelengths. We could provide many kinds of high precision prisms, including as follows: Penta Prism Beamsplitter Penta Prism Dove Prism Right-Angle Prism BK7 Wedge Fused Silica Wedge Roof Prism Corner Cube Retroreflector Anamorphic Prism According to different application, you could choose different prism. If you want know more about them, pls kindly refer to our website. lens: Lenses have many applications ranging from the simple collection of the scanning of laser beams to precise imaging and image transfer. We provide these lenses as follows for different application. Plano Convex Lens Plano Concave Lens Double Convex Lens Double Concave Lens Achromatic Lens Cylindrical Lens According to different application, you could choose different lens with BK7 or fused silica material.