Part Details | OPTICAL INSTRUMENT LENS
6650-00-626-1891 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.
Alternate Parts: 1240006261891, 8289260, 6650-00-626-1891, 00-626-1891, 6650006261891, 006261891
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 66 | JAN 01, 1963 | 00-626-1891 | 21884 ( LENS, OPTICAL INSTRUMENT ) |
REFERENCE DRAWINGS & PICTURES
DOUBLET
Cross Reference | NSN 6650-00-626-1891
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 1240006261891 | A00AM | E.C.A ETABLISSEMENT CENTRALDESAPPROVISIONNEMENTS DES FORCES |
| 8289260 | 19200 | US ARMY ARDEC RDECOM |
Technical Data | NSN 6650-00-626-1891
| Characteristic | Specifications |
|---|---|
| MATERIAL | GLASS OPTICAL |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-G-174, CLASS 1, GRADE C MIL SPEC SINGLE MATERIAL RESPONSE |
| COMPOUND LENS STYLE | DOUBLET |
| INDIVIDUAL LENS STYLE | DOUBLE CONCAVE AND DOUBLE CONVEX |
| DIAMETER | 1.650 INCHES NOMINAL |
| AXIAL THICKNESS | 0.100 INCHES NOMINAL AND 0.610 INCHES NOMINAL |
| COMPOUND LENS OVERALL AXIAL THICKNESS | 0.710 INCHES NOMINAL |
| COMPOUND LENS EDGE THICKNESS | 0.531 INCHES NOMINAL |
| ELEMENT LEFT SURFACE RADIUS | 2.656 INCHES |
| ELEMENT RIGHT SURFACE RADIUS | 1.663 INCHES |
| EQUIVALENT FOCAL LENGTH | 6.532 INCHES |
| BACK FOCAL LENGTH | 7.274 INCHES |
| REFRACTION INDEX | 1.6490 NOMINAL AND 1.6200 NOMINAL |
| ABBE CONSTANT | B33.800$$B60.300 |
| FSC APPLICATION DATA | PERISCOPE,INTEGRATED WITH FIRE CONTROL EQUIPMENT |