NSN 6650-00-518-4994
Part Details | OPTICAL INSTRUMENT LENS
6650-00-518-4994 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: 5184994, 6650-00-518-4994, 00-518-4994, 6650005184994, 005184994
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 66 | JAN 01, 1963 | 00-518-4994 | 21884 ( LENS, OPTICAL INSTRUMENT ) |
REFERENCE DRAWINGS & PICTURES
DOUBLET
Cross Reference | NSN 6650-00-518-4994
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 5184994 | 19207 | U S ARMY TANK AUTOMOTIVE COMMANDAMSTA-IM-MM |
Technical Data | NSN 6650-00-518-4994
| Characteristic | Specifications |
|---|---|
| COMPOUND LENS STYLE | DOUBLET |
| INDIVIDUAL LENS STYLE | DOUBLE CONCAVE AND DOUBLE CONVEX |
| DIAMETER | 1.467 INCHES NOMINAL |
| AXIAL THICKNESS | 0.060 INCHES NOMINAL AND 0.539 INCHES NOMINAL |
| COMPOUND LENS OVERALL AXIAL THICKNESS | 0.599 INCHES NOMINAL |
| COMPOUND LENS EDGE THICKNESS | 0.481 INCHES NOMINAL |
| ELEMENT LEFT SURFACE RADIUS | -3.027 INCHES AND 1.398 INCHES |
| ELEMENT RIGHT SURFACE RADIUS | 1.398 INCHES AND 1.398 INCHES |
| EQUIVALENT FOCAL LENGTH | 7.522 INCHES |
| BACK FOCAL LENGTH | 8.315 INCHES |
| REFRACTION INDEX | 1.6170 NOMINAL AND 1.5170 NOMINAL |
| ABBE CONSTANT | B36.600$$B64.500 |
| FSC APPLICATION DATA | OBSERVATION INSTRUMENT M1 |