1240-00-171-4177, WINDOW,OPTICAL INSTRUMENT

1240-00-171-4176 WINDOW,OPTICAL INSTRUMENT

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:

1235962	10001	NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER
30091	21587	OPTICAL TECHNOLOGY DEVICES INC

Techincal Specification:

MATERIAL	GLASS OPTICAL
MATERIAL DOCUMENT AND CLASSIFICATION	JAN-G-174, TYPE 517-645, GRADE C MIL SPEC SINGLE MATERIAL RESPONSE
REFRACTION INDEX	1.5170 NOMINAL
DISPERSION	64.5 ANGSTROMS NOMINAL
REFLECTION REDUCING SURFACE	ONE
POLISHED PERIPHERY	NOT PROVIDED
WIDTH	287.000 MILLIMETERS MINIMUM AND
	288.000 MILLIMETERS MAXIMUM
LENGTH	349.000 MILLIMETERS MINIMUM AND
	350.000 MILLIMETERS MAXIMUM
THICKNESS	18.800 MILLIMETERS MINIMUM AND
	19.200 MILLIMETERS MAXIMUM
BEVEL ANGLE IN DEG	45.000 NOMINAL
BEVEL DEPTH	2.000 MILLIMETERS NOMINAL
SPECIAL FEATURES	FOUR ROUNDED CORNERS 26.5 MM PLUS 1.0,MINUS 0.0 (1.0433 IN.) RADIUS
FSC APPLICATION DATA	TELESCOPE MK 102 MOD 3

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