NSN 6650-00-155-1764

Part Details | OPTICAL INSTRUMENT LENS

6650-00-155-1764 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: 278694PC14, 278694PC14, 745659PC1, 745659PC1, 6650-00-155-1764, 00-155-1764, 6650001551764, 001551764

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
66JAN 01, 196300-155-176421884 ( LENS, OPTICAL INSTRUMENT )
REFERENCE DRAWINGS & PICTURES

DOUBLET

LENS,OPTICAL INSTRU | 6650-00-155-1764, 001551764
Cross Reference | NSN 6650-00-155-1764
Part Number Cage Code Manufacturer
278694PC1464804BAUSCH AND LOMB INCOPTHALMIC INSTRUMENT DIV
278694PC1410001NAVAIR AND NAVSEA MANAGEDORIGINAL DESIGN ACTIVITY DWG NOT
745659PC110001NAVAIR AND NAVSEA MANAGEDORIGINAL DESIGN ACTIVITY DWG NOT
745659PC153711NAVAL SEA SYSTEMS COMMAND
Technical Data | NSN 6650-00-155-1764
Characteristic Specifications
COMPOUND LENS STYLE DOUBLET
INDIVIDUAL LENS STYLE DOUBLE CONVEX AND MENISCUS DIVERGING
DIAMETER5.0 MILLIMETERS NOMINAL
AXIAL THICKNESS2.2 MILLIMETERS NOMINAL AND 1.1 MILLIMETERS NOMINAL
COMPOUND LENS OVERALL AXIAL THICKNESS3.3 MILLIMETERS NOMINAL
ELEMENT LEFT SURFACE RADIUS22.1 MILLIMETERS AND -8.5 MILLIMETERS
ELEMENT RIGHT SURFACE RADIUS8.5 MILLIMETERS AND 30.7 MILLIMETERS
EQUIVALENT FOCAL LENGTH2.700 CENTIMETERS
BACK FOCAL LENGTH2.720 CENTIMETERS
FRONT FOCAL LENGTH2.760 CENTIMETERS
REFRACTION INDEX1.5725 NOMINAL AND 1.6170 NOMINAL
ABBE CONSTANTB57.400$$B36.600
END ITEM IDENTIFICATIONRANGEFINDER MK57