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National Stock Number:
1240-01-191-1670
Federal Supply Class:
1240
National Item Identification Number:
011911670
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:
| 8615947 | 19200 | US ARMY ARDEC RDECOM |
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Techincal Specification:
| BEVEL ANGLE IN DEG | 45.000 NOMINAL | | CUBIC MEASURE | 0.4495 CUBIC INCHES | | DIAMETER | 1.692 INCHES NOMINAL | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-G-174, CLASS 1, GRADE C, TYPE 517-645 MIL SPEC SINGLE MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED | | MATERIAL | GLASS OPTICAL LOCATION NOT OTHERWISE SPECIFIED | | POLISHED SURFACE | BOTH | | POLISHED PERIPHERY | NOT PROVIDED | | SPECIAL FEATURES | LIGHT DEVIATION NOT TO EXCEED 1.0MINUTE OF ARC; SURFACE QUALITY IS 80-50; SPHERICAL POWER NOT TO EXCEED 4 MILLIDIOPTERS; ASTIGMATISM NOT TO EXCEED 2 MILLIDIOPTERS | | THICKNESS | 0.157 INCHES NOMINAL |
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