The KBC019AR.18 Bi-Concave Lens is a 1000 to 1550 nm anti-reflection coated, 12.7 mm diameter, N-BK7 Bi-concave lens with an effective focal length of -75 mm. It is designed to meet the demanding requirements of laser electro-optic applications. Newport's N-BK7 precision bi-concave lenses are manufactured from fine annealed optical glass and are polished to tight tolerances using master test plates to ensure minimum wavefront distortion.

KBC019AR。18双凹透镜为1000 ~ 1550nm的防反射涂层,直径12.7 mm,有效焦距-75 mm,为N-BK7双凹透镜。它是为满足激光电光应用的要求而设计的。纽波特公司的N-BK7精密双凹透镜是由经过精细退火的光学玻璃制造的,并使用主测试板抛光至严格公差,以确保最小的波前畸变。