The KBC019 Bi-Concave Lens is an uncoated 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.

KBC019双凹透镜是一种直径12.7 mm的无涂层N-BK7双凹透镜,有效焦距为-75 mm。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。