Lens is a kind of optical element which can diverge or converge light beam. Lens can be widely used in security, vehicle, digital camera, laser, optical instrument, etc. It plays an important role in astronomy, military, transportation, medicine and other fields. Our company can provide or customize positive and negative lenses (including flat convex, biconvex, meniscus, flat concave and biconvex) with different wavebands, different focal lengths and different apertures based on K9, fused quartz and other materials to meet various commercial and scientific purposes