BPW flat concave lens Introduction: A flat concave lens has a negative focal length that is used to reduce the image or diverge light, which can be used to offset the aberrations of other lenses in the system. Products with coating have better transmittance. Technical parameters: Materials: optical glass and silicon, germanium, zinc selenide, zinc sulfide, fluoride, sapphire Diameter tolerance:+0/-0.01~+0/-0.1mm Thickness tolerance: ± 0.01~± 0.1mm Face type: λ/ 10~ λ/ 2@632.8nm Finish: 10/5~60/40 Eccentricity:<30 "~3 ' Effective aperture:>90% Chamfer: Coating: antireflective film, bandwidth antireflective film
Introduction: A flat concave lens has a negative focal length that is used to reduce the image or diverge light, which can be used to offset the aberrations of other lenses in the system. Products with coating have better transmittance.
