Part Details | OPTICAL INSTRUMENT LENS
6650-00-157-9403 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: 654752, 481120PC4, 4811204, 481120-4, LD172589PC66, 6650-00-157-9403, 00-157-9403, 6650001579403, 001579403
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 66 | JAN 01, 1963 | 00-157-9403 | 21884 ( LENS, OPTICAL INSTRUMENT ) |
REFERENCE DRAWINGS & PICTURES
DOUBLET
Cross Reference | NSN 6650-00-157-9403
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 654752 | 53711 | NAVAL SEA SYSTEMS COMMAND |
| 481120PC4 | 53711 | NAVAL SEA SYSTEMS COMMAND |
| 481120-4 | 53711 | NAVAL SEA SYSTEMS COMMAND |
| LD172589PC66 | 53711 | NAVAL SEA SYSTEMS COMMAND |
Technical Data | NSN 6650-00-157-9403
| Characteristic | Specifications |
|---|---|
| COMPOUND LENS STYLE | DOUBLET |
| INDIVIDUAL LENS STYLE | DOUBLE CONVEX AND PLANO-CONCAVE |
| DIAMETER | 2.204 INCHES NOMINAL |
| AXIAL THICKNESS | 0.157 INCHES NOMINAL AND 0.866 INCHES NOMINAL AND 0.866 INCHES NOMINAL |
| COMPOUND LENS OVERALL AXIAL THICKNESS | 1.023 INCHES NOMINAL |
| COMPOUND LENS EDGE THICKNESS | 0.590 INCHES NOMINAL |
| ELEMENT LEFT SURFACE RADIUS | -5.139 INCHES AND 6.693 INCHES |
| ELEMENT RIGHT SURFACE RADIUS | -1.704 INCHES AND 1.704 INCHES |
| EQUIVALENT FOCAL LENGTH | 3.952 INCHES |
| BACK FOCAL LENGTH | 4.089 INCHES |
| FRONT FOCAL LENGTH | 3.170 INCHES |
| REFRACTION INDEX | 1.6210 NOMINAL AND 1.5170 NOMINAL |
| ABBE CONSTANT | B36.200$$B64.500 |
| FSC APPLICATION DATA | GUNSIGHT MK 15 MOD 2 |