BiConcave lenses have a negative focal length
and are commonly used to increase the divergence of converging
light. With two concave surfaces, a BiConcave lens is more divergent
than a plano concave lens if the radius of curvature for all the
curved surfaces on both lenses is the same.
This is the general standards we offer our customers,
UNION OPTICS can supply other lenses meet your requirements, for
detail information, please contact us.