Realpoo Optics offer high quality molded glass aspheric lens. And we can offer good price and fast shipping.
Product Name: Aspheric Lens
Diameter: 4mm
Focal Length: 4mm
Center Thickness: 2mm
Numerical Aperture NA: 0.4
Clear Aperture CA: 3.2
Substrate: D-ZK3
Bevel: Protective bevel as needed
Coating: AR coating 400-700nm
An aspheric lens or asphere is a lens whose surface profiles are not portions of a sphere or cylinder. In photography, a lens assembly that includes an aspheric element is often called an aspherical lens.