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National Stock Number:
6650-00-626-1891
Federal Supply Class:
6650
National Item Identification Number:
006261891
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:
| 1240006261891 | A00AM | E.C.A ETABLISSEMENT CENTRAL DESAPPROVISIONNEMENTS DES FORCES ARMEE | | 8289260 | 19200 | US ARMY ARDEC RDECOM |
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Techincal Specification:
| ELEMENT LEFT SURFACE RADIUS | 2.656 INCHES | | ELEMENT RIGHT SURFACE RADIUS | 1.663 INCHES | | ABBE CONSTANT | 33.800 AND 60.300 | | BACK FOCAL LENGTH | 7.274 INCHES | | AXIAL THICKNESS | 0.100 INCHES NOMINAL AND 0.610 INCHES NOMINAL | | COMPOUND LENS EDGE THICKNESS | 0.531 INCHES NOMINAL | | COMPOUND LENS OVERALL AXIAL THICKNESS | 0.710 INCHES NOMINAL | | COMPOUND LENS STYLE | DOUBLET | | DIAMETER | 1.650 INCHES NOMINAL | | EQUIVALENT FOCAL LENGTH | 6.532 INCHES | | FSC APPLICATION DATA | PERISCOPE,INTEGRATED WITH FIRE CONTROL EQUIPMENT | | INDIVIDUAL LENS STYLE | DOUBLE CONCAVE AND DOUBLE CONVEX | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-G-174, CLASS 1, GRADE C MIL SPEC SINGLE MATERIAL RESPONSE | | MATERIAL | GLASS OPTICAL | | REFRACTION INDEX | 1.6490 NOMINAL AND 1.6200 NOMINAL |
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