Double Concave lenses (DCV) have two inward curved sides and negative focal length. They are used for image reduce and to spread light. All dimensions are in mm.
Negative outer surface should have the following annulus: annulus=(diameter - clear aperture)/2 - bevel.
Clear Aperture Specification: 3.00 diameter CA=(diameter) - 0.50mm
3.01-12.50 diameter CA=(diameter) = 1.00mm
12.51-75.00 diameter CA=(diameter) - 1.50m
Coating: 1/4 Wave MgF2 @ 550nm
(All specifications are subject to chance without notice. We reserve the right to correct misprints.)