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National Stock Number:
6650-00-692-1532
Federal Supply Class:
6650
National Item Identification Number:
006921532
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:
| 1240006921532 | SCY13 | E.C.A ETABLISSEMENT CENTRALD'APPROVISIONNEMENT DES FORCES ARMEE | | 8270611 | 19200 | US ARMY ARDEC RDECOM |
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Techincal Specification:
| ELEMENT RIGHT SURFACE RADIUS | 1.0420 INCHES | | ELEMENT LEFT SURFACE RADIUS | 5.3640 INCHES | | ABBE CONSTANT | 33.800 AND 58.800 | | AXIAL THICKNESS | 0.121 INCHES NOMINAL AND 0.210 INCHES NOMINAL | | COMPOUND LENS EDGE THICKNESS | 0.306 INCHES NOMINAL | | COMPOUND LENS OVERALL AXIAL THICKNESS | 0.331 INCHES NOMINAL | | COMPOUND LENS STYLE | DOUBLET | | DIAMETER | 0.984 INCHES NOMINAL | | EQUIVALENT FOCAL LENGTH | 4.739 INCHES | | FRONT FOCAL LENGTH | 4.628 INCHES | | FSC APPLICATION DATA | SIGHT PERISCOPE M28,INTEGRATED WITH FIRE CONTROL EQUIPMENT | | INDIVIDUAL LENS STYLE | DOUBLE CONVEX | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-G-174, CLASS 1, GRADE C MIL SPEC SINGLE MATERIAL RESPONSE | | MATERIAL | GLASS OPTICAL | | REFRACTION INDEX | 1.6110 MINIMUM AND 1.6490 MAXIMUM |
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