NSN 6650-00-520-4255

Part Details | OPTICAL INSTRUMENT LENS

6650-00-520-4255 An unmounted, transparent, color free lens which may be treated with a low reflection coating to increase light transmission. Includes single and compound elements. For items having two plane parallel surfaces, see WINDOW, OPTICAL INSTRUMENT. Excludes RETICLE, OPTICAL INSTRUMENT.

Alternate Parts: 5204255, 6650-00-520-4255, 00-520-4255, 6650005204255, 005204255

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
66JAN 01, 196300-520-425521884 ( LENS, OPTICAL INSTRUMENT )
REFERENCE DRAWINGS & PICTURES

DOUBLET

LENS,OPTICAL INSTRU | 6650-00-520-4255, 005204255
Cross Reference | NSN 6650-00-520-4255
Part Number Cage Code Manufacturer
520425519200US ARMY ARDEC RDECOM
Technical Data | NSN 6650-00-520-4255
Characteristic Specifications
MATERIAL GLASS OPTICAL
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-174, CLASS 1, GRADE C MIL SPEC SINGLE MATERIAL RESPONSE
COMPOUND LENS STYLE DOUBLET
INDIVIDUAL LENS STYLE DOUBLE CONVEX AND MENISCUS DIVERGING
DIAMETER2.048 INCHES NOMINAL
AXIAL THICKNESS0.394 INCHES NOMINAL AND 0.177 INCHES NOMINAL
COMPOUND LENS OVERALL AXIAL THICKNESS0.571 INCHES NOMINAL
COMPOUND LENS EDGE THICKNESS0.406 INCHES NOMINAL
ELEMENT LEFT SURFACE RADIUS5.122 INCHES
ELEMENT RIGHT SURFACE RADIUS2.785 INCHES
EQUIVALENT FOCAL LENGTH7.598 INCHES
BACK FOCAL LENGTH7.348 INCHES
REFRACTION INDEX1.5110 NOMINAL AND 1.6170 NOMINAL
ABBE CONSTANTB63.500$$B36.600
FSC APPLICATION DATABINOCULAR,FIRE CONTROL