Product Details | SEMIFINISHED BIFOCAL OPHTHALMIC LENS BLANK

6540-01-310-4966 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.

Part Alternates: P10.50 BC P1.25 ADD, P1050BCP125ADD, 6540-01-310-4966, 01-310-4966, 6540013104966, 013104966

Medical, Dental, and Veterinary Equipment and Supplies | Ophthalmic Instruments, Equipment, and Supplies

Supply Group (FSG) NSN Assign. NIIN
65 04-NOV-89 01-310-4966

Drawings & Photos | NSN 6540-01-310-4966


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Technical Data | NSN 6540-01-310-4966

Characteristic Specifications
STYLE DESIGNATOR A2 ROUND WITH STRAIGHT TOP BIFOCAL SEGMENT
DIAMETER 66.0 MILLIMETERS NOMINAL
THICKNESS 12.0 MILLIMETERS NOMINAL
READING SEGMENT DIAMETER 25.0 MILLIMETERS NOMINAL
READING SEGMENT HEIGHT 17.500 INCHES NOMINAL
MATERIAL AND LOCATION PLASTIC OVERALL
LIGHT TRANSMISSION UNTINTED
CROSS-SECTIONAL SHAPE STYLE D2 SPHERE
BASE CURVE DIOPTER 10.50 PLUS NOMINAL
CROSS CURVE DIOPTER ANY ACCEPTABLE
SPHERE CURVE INSIDE DIOPTER ANY ACCEPTABLE
SPHERE CURVE OUTSIDE DIOPTER ANY ACCEPTABLE
ADDITIONAL POWER RATING IN DIOPTERS 1.250 BIFOCAL
SPECIAL FEATURES FLAT TOP; CR-39; SEGMENT POSITIONED 5 MM BELOW AND 5 MM IN FROM GEOMETRIC CENTER FOR RIGHT AND LEFT LENSES (PORM 2 MM)

Restrictions/Controls & Freight Information | NSN 6540-01-310-4966

Category Code Description
Shelf-Life Code:0Nondeteriorative
Hazardous Material Indicator CodeNThere is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials
Demilitarization Code:ANon-Munitions List Item/ Non-Strategic List Item - Demilitarization not required.
Controlled Inventory Item Code:UUNCLASSIFIED
Precious Metals Indicator Code:AItem does not contain precious metal
Criticality Code:X The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Category Code Description
No Freight Information