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National Stock Number:
1240-01-497-4402
Federal Supply Class:
1240
National Item Identification Number:
014974402
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:
| 5612977 | 53711 | NAVAL SEA SYSTEMS COMMAND |
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Techincal Specification:
| DIAMETER | 34.0 MILLIMETERS NOMINAL | | PART NAME ASSIGNED BY CONTROLLING AGENCY | EYEPIECE, EL-3, DOUBLET | | MATERIAL | GLASS OPTICAL AND MAGNESIUM FLUORIDE LOCATION NOT OTHERWISE SPECIFIED | | POLISHED PERIPHERY | NOT PROVIDED | | SPECIAL FEATURES | TWO LENS PIECES BONDED TOGETHER. CONVEX RADII ARE 30.5 MM AND 38.0 MM MAX. | | THICKNESS | 14.9 MILLIMETERS MINIMUM AND 15.1 MILLIMETERS MAXIMUM |
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