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National Stock Number:
6650-00-119-3966
Federal Supply Class:
6650
National Item Identification Number:
001193966
Description:
LENS,OPTICAL INSTRUMENT
Detail:
An unmounted, transparent, color free lens which may be treated with a low reflection coating to increase light transmission. Includes single and compound elements. For items having two plane parallel surfaces, see WINDOW, OPTICAL INSTRUMENT. Excludes RETICLE, OPTICAL INSTRUMENT.
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Manufacturer Information:
| 6650001193966 | A00AM | E.C.A ETABLISSEMENT CENTRAL DESAPPROVISIONNEMENTS DES FORCES ARMEE | | 8644284 | 19200 | US ARMY ARDEC RDECOM |
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Techincal Specification:
| ELEMENT LEFT SURFACE RADIUS | 143.191 MILLIMETERS | | ELEMENT RIGHT SURFACE RADIUS | 6.256 INCHES | | ABBE CONSTANT | 33.800 AND 53.400 | | AXIAL THICKNESS | 0.297 INCHES MINIMUM AND 0.317 INCHES MAXIMUM AND 0.705 INCHES MINIMUM AND 0.725 INCHES MAXIMUM | | BACK FOCAL LENGTH | 15.807 INCHES | | COMPOUND LENS OVERALL AXIAL THICKNESS | 1.002 INCHES MINIMUM AND 1.042 INCHES MAXIMUM | | COMPOUND LENS STYLE | DOUBLET | | DIAMETER | 3.097 INCHES MINIMUM AND 3.100 INCHES MAXIMUM | | EQUIVALENT FOCAL LENGTH | 16.560 INCHES | | FSC APPLICATION DATA | COLLIMATOR | | INDIVIDUAL LENS STYLE | DOUBLE CONCAVE AND DOUBLE CONVEX | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-G-174,CLASS 1,GRADE C,TYPE 649-338 MIL SPEC 1ST MATERIAL RESPONSE AND MIL-G-174,CLASS 1,GRADE C,TYPE 588-534 MIL SPEC 2ND MATERIAL RESPONSE | | MATERIAL | GLASS OPTICAL | | REFRACTION INDEX | 1.6490 NOMINAL AND 1.5880 NOMINAL | | SPECIAL FEATURES | FRONT AND BACK SURFACES COATED WITH MAGNESIUM FLUORIDE |
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