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.

NOTES:

1. Negative outer surface should have the following annulus: annulus=(diameter - clear aperture)/2 - bevel.

2. 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

3. Coating: 1/4 Wave MgF2 @ 550nm

(All specifications are subject to chance without notice. We reserve the right to correct misprints.)