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National Stock Number:
1240-01-181-9519
Federal Supply Class:
1240
National Item Identification Number:
011819519
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:
| 13074904 | 04939 | LOCKHEED MARTIN CORPORATION | | 13074904 | 58260 | PROGRAM MANAGER ADVANCED ATTACK HELICOPTER BARCOM AMCPM-AAH |
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Techincal Specification:
| MATERIAL | GLASS LOCATION NOT OTHERWISE SPECIFIED | | SPECIAL FEATURES | 1.06 MICROMETER ABSORBING REFRACTIVE;1.685 IN. DIA;1.486 IN. APERTURE DIA |
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