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National Stock Number:
1240-01-181-9518
Federal Supply Class:
1240
National Item Identification Number:
011819518
Description:
FILTER,LIGHT,INTERFERENCE
Detail:
A LIGHT TRANSMITTING ITEM CONSISTING OF A TRANSPARENT, FLAT GLASS BODY HAVING TWO PLANE-PARALLEL SURFACES, EITHER WITH ONLY NONABSORBING DIELECTRIC COATINGS OR ABSORBING AND NONABSORBING COATINGS OF A THICKNESS NEARLY EQUIVALENT TO THE WAVELENGTH OF THE TRANSMITTED LIGHT. INTERFERENCE BEGINS AT THE THIN BORDERING SURFACES OF THE COATINGS, THE PENETRATING LIGHT WAVES BEING SUPERIMPOSED ON THE REFLECTED LIGHT WAVES. THE ITEM CAN BE INSTALLED IN VARIOUS OPTICAL INSTURMENTS, TO SERVE AS AN EYE PROTECTING DEVICE.
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Manufacturer Information:
| 13075596 | 04939 | LOCKHEED MARTIN CORPORATION | | 13075596 | 58260 | PROGRAM MANAGER ADVANCED ATTACK HELICOPTER BARCOM AMCPM-AAH |
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Techincal Specification:
| SPECIAL FEATURES | MATL-OPTICAL GLASS;1.860 IN. H;1.088 IN. W;1.450 IN. LG |
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