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National Stock Number:
6650-00-692-1540
Federal Supply Class:
6650
National Item Identification Number:
006921540
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:
| 1240006921540 | A00AM | E.C.A ETABLISSEMENT CENTRAL DESAPPROVISIONNEMENTS DES FORCES ARMEE | | 1240006921540 | SCY13 | E.C.A ETABLISSEMENT CENTRALD'APPROVISIONNEMENT DES FORCES ARMEE | | 8270617 | 19200 | US ARMY ARDEC RDECOM |
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Techincal Specification:
| ELEMENT RIGHT SURFACE RADIUS | 1.366 INCHES | | ELEMENT LEFT SURFACE RADIUS | 1.488 INCHES | | ABBE CONSTANT | 55.500 AND 33.800 | | AXIAL THICKNESS | 0.484 INCHES NOMINAL AND 0.092 INCHES NOMINAL | | BACK FOCAL LENGTH | 3.169 INCHES | | COMPOUND LENS EDGE THICKNESS | 0.436 INCHES NOMINAL | | COMPOUND LENS OVERALL AXIAL THICKNESS | 0.576 INCHES NOMINAL | | COMPOUND LENS STYLE | DOUBLET | | DIAMETER | 1.575 INCHES NOMINAL | | EQUIVALENT FOCAL LENGTH | 3.729 INCHES | | FSC APPLICATION DATA | SIGHT PERISCOPE M28,INTEGRATED WITH FIRE CONTROL EQUIPMENT | | INDIVIDUAL LENS STYLE | DOUBLE CONVEX AND DOUBLE CONCAVE | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-G-174, CLASS 1, GRADE C MIL SPEC SINGLE MATERIAL RESPONSE | | MATERIAL | GLASS OPTICAL | | REFRACTION INDEX | 1.6380 NOMINAL AND 1.6490 NOMINAL |
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