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National Stock Number:
1240-01-251-4848
Federal Supply Class:
1240
National Item Identification Number:
012514848
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:
| 9377159 | 19200 | US ARMY ARDEC RDECOM |
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Techincal Specification:
| OVERALL THICKNESS | 0.385 INCHES NOMINAL | | MATERIAL | GLASS LOCATION NOT OTHERWISE SPECIFIED | | MATERIAL | PLASTIC SURFACE | | OVERALL DIAMETER | 3.120 INCHES NOMINAL | | STYLE DESIGNATOR | FLAT | | SURFACE PARALLELISM | 20.0 SECONDS |
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