Part Details | OPTICAL INSTRUMENT LENS
6650-00-622-4990 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: 8289293, 6650-00-622-4990, 00-622-4990, 6650006224990, 006224990
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 66 | JAN 01, 1963 | 00-622-4990 | 21884 ( LENS, OPTICAL INSTRUMENT ) |
REFERENCE DRAWINGS & PICTURES
DOUBLET
Cross Reference | NSN 6650-00-622-4990
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 8289293 | 19200 | US ARMY ARDEC RDECOM |
Technical Data | NSN 6650-00-622-4990
| Characteristic | Specifications |
|---|---|
| COMPOUND LENS STYLE | DOUBLET |
| INDIVIDUAL LENS STYLE | DOUBLE CONVEX AND PLANO-CONCAVE |
| DIAMETER | 1.696 INCHES MINIMUM AND 1.699 INCHES MAXIMUM |
| AXIAL THICKNESS | 0.280 INCHES NOMINAL AND 0.118 INCHES NOMINAL |
| COMPOUND LENS OVERALL AXIAL THICKNESS | 0.398 INCHES NOMINAL |
| ELEMENT LEFT SURFACE RADIUS | 3.668 INCHES |
| ELEMENT RIGHT SURFACE RADIUS | 3.668 INCHES |
| EQUIVALENT FOCAL LENGTH | 8.819 INCHES |
| BACK FOCAL LENGTH | 8.608 INCHES |
| FRONT FOCAL LENGTH | 8.210 INCHES |
| REFRACTION INDEX | 1.5125 NOMINAL AND 1.6210 NOMINAL |
| ABBE CONSTANT | B60.500$$B36.200 |