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National Stock Number:
1240-00-499-4247
Federal Supply Class:
1240
National Item Identification Number:
004994247
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:
| 10-30477-1 | 82918 | THE BOEING COMPANY | | 16819 | 22669 | COHERENT AEROSPACE & DEFENSE, INC. | | 4500052 | 11536 | OPTICAL COATING LABORATORY, LLC | | 16819-04 | 22669 | COHERENT AEROSPACE & DEFENSE, INC. |
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Techincal Specification:
| LENGTH | 12.188 INCHES NOMINAL | | MATERIAL | GERMANIUM LOCATION NOT OTHERWISE SPECIFIED | | POLISHED PERIPHERY | PROVIDED | | REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS | AS DIFFERENTIATED BY BOEING DRAWING NUMBER 10-30477-1 CAGE 82918 | | SPECIAL FEATURES | TRANSMITTANCE 90% T AVG 8.0 TO 11.5 MICRONS. HAS MLAR (MULTI-LAYER ANTI-REFLECTION) COATING. | | WIDTH | 8.125 INCHES NOMINAL |
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