very weird optics lens truncated and tapered on center optical laser mil spec

OPTICAL CONVEX LENS THICK NOS LASER OPTICS MIL SPEC

OPTICAL MIL SPEC THICK CONVEX CONCAVE LENS LASER OPTICS AS PICTURED &13-A-37

OPTICAL rare concave concave lens MIL SPEC laser OPTICS AS PICTURED Z1-A-87

SPECTRA PHYSICS OUTPUT LENS LASER OPTICS AS IS #91-62

OPTICAL COATED RECTANGULAR FLAT LENS LASER OPTICS MIL SPEC AS PICTURED &3-FT-X40

OPTICAL LENS MIL SPEC FEATURE AT CENTER LASER OPTICS #6-015

OPTICAL CONVEX LENS MOUNTED MIL SPEC ii LASER OPTICS BIN-3B