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National Stock Number:
1240-01-497-4320
Federal Supply Class:
1240
National Item Identification Number:
014974320
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.
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Manufacturer Information:
| 5612975 | 53711 | NAVAL SEA SYSTEMS COMMAND |
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Techincal Specification:
| DIAMETER | 41.9 MILLIMETERS MINIMUM AND 42.0 MILLIMETERS MAXIMUM | | PART NAME ASSIGNED BY CONTROLLING AGENCY | EYEPIECE,EL-1 | | MATERIAL | MAGNESIUM FLUORIDE AND GLASS OPTICAL LOCATION NOT OTHERWISE SPECIFIED | | POLISHED PERIPHERY | NOT PROVIDED | | SPECIAL FEATURES | CONVEX RADIUS IS 55.4 MM MAX | | THICKNESS | 8.9 MILLIMETERS MINIMUM AND 9.0 MILLIMETERS MAXIMUM |
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