The N-BK7(H-K9L) from Yutai Optics is a Plano-Convex lens that has a diameter of 0.5 to 300 mm. It is available in a standard version with 40-20 scratch and dig surface quality or an economic version with 60-40 scratch and dig quality for less demanding applications. This lens is also available as uncoated or in a variety of antireflection coatings for most visible and NIR applications. It provides great performance at a good value with its high homogeneity, low bubble, inclusion content and straightforward manufacturability. 

The N-BK7(H-K9L) uses UV fused Silica material that features exceptional diameter and centration specifications, making it ideal for integration into demanding imaging and targeting applications. It also provides a low index of refraction, low coefficient of thermal expansion, and low inclusion content making it ideal for laser applications and harsh environmental conditions.