1240-00-171-4176 WINDOW,OPTICAL INSTRUMENT Index 1240-00-171-4178 WINDOW,OPTICAL INSTRUMENT

National Stock Number:
1240-00-171-4177

Federal Supply Class:
1240

National Item Identification Number:
001714177

Description:
WINDOW,OPTICAL INSTRUMENT

Detail:
A COLOR FREE ITEM OF TRANSPARENT OR TRANSLUCENT MATERIAL, USUALLY OPTICAL GLASS, HAVING SPECIFIC LIGHT DISPERSIVE AND REFRACTIVE PROPERTIES. THIS ITEM MUST HAVE TWO PLANE-PARALLEL SURFACES AND IS DESIGNED FOR USE IN AN OPTICAL INSTRUMENT TO PROVIDE A BARRIER TO FOREIGN MATTER AND/OR PERMIT LIGHT TRANSMISSION IN OR TO THE OPTICAL SYSTEM.


Manufacturer Information:
123596210001NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER
3009121587OPTICAL TECHNOLOGY DEVICES INC


Techincal Specification:
BEVEL ANGLE IN DEG45.000 NOMINAL
BEVEL DEPTH2.000 MILLIMETERS NOMINAL
DISPERSION64.5 ANGSTROMS NOMINAL
FSC APPLICATION DATATELESCOPE MK 102 MOD 3
LENGTH349.000 MILLIMETERS MINIMUM AND 350.000 MILLIMETERS MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONJAN-G-174, TYPE 517-645, GRADE C MIL SPEC SINGLE MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED
MATERIALGLASS OPTICAL LOCATION NOT OTHERWISE SPECIFIED
POLISHED PERIPHERYNOT PROVIDED
REFLECTION REDUCING SURFACEONE
REFRACTION INDEX1.5170 NOMINAL
SPECIAL FEATURESFOUR ROUNDED CORNERS 26.5 MM PLUS 1.0,MINUS 0.0 (1.0433 IN.) RADIUS
WIDTH287.000 MILLIMETERS MINIMUM AND 288.000 MILLIMETERS MAXIMUM
THICKNESS18.800 MILLIMETERS MINIMUM AND 19.200 MILLIMETERS MAXIMUM


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