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.