Flat top; cr-39; segment positioned 5 mm below and 5 mm in from geometric center for right and left lenses (porm 2 mm)
A transparent optical element consisting of a major blank and a bifocal segment. The blank and segment have been pressed in a glass mold to an approximate size and shape, and are ground and polished to a finished diopter curvature on one surface only.
Classification: Lens blanks (other than for spectacles) not optically worked, of glass, (optical elements)
NSN 6135-00-686-4777
NSN 6135-01-433-2062
NSN 6645-01-387-7149
NSN 6220-01-145-0198
NSN 6130-00-857-4491
NSN 6240-00-272-8601
NSN 5915-01-514-7136
NSN 6105-00-547-3885
NSN 6240-01-200-7937
NSN 5910-01-398-0621
NSN 2925-01-281-6403
NSN 5998-01-584-1590