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National Stock Number:
1240-01-063-1347
Federal Supply Class:
1240
National Item Identification Number:
010631347
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:
| SM-D-805050 | 80063 | US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR |
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Techincal Specification:
| LENGTH | 6.000 INCHES NOMINAL | | MATERIAL | GERMANIUM | | POLISHED PERIPHERY | PROVIDED | | SPECIAL FEATURES | MATERIAL USED IN THE MANUFACTURE OF THIS OPTICAL PART SHALL NOT CONTAINTHORIUM,OTHER RADIOACTIVE MATERIAL OR ANY COMBINATION OF NUCLEAR MATERIALS IN EXCESS OF 0.05 PERCENT BY WEIGHT AS DEFINED BY THE TITLE 10,CODE OF FEDERAL REGULATIONS,PART 40.THE INFRARED ANTIREFLECTIVE COATING IS EXCLUDED FROM THIS RESTRICTION AND CONTAINS THORIUM APPROXIMATELY .0011 GRAMS PER SQUARE CENTIMETER OF COATED SURFACE.THORIUM IN THE ANTIREFLECTIVE COATING SHOULD NOT EXCEED THIS AMOUNT | | WIDTH | 4.725 INCHES NOMINAL | | THICKNESS | 0.250 INCHES NOMINAL |
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