NSN 6650-00-382-1820
Part Details | OPTICAL INSTRUMENT LENS
6650-00-382-1820 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: 3000095, LD172589GP5, 6650-00-382-1820, 00-382-1820, 6650003821820, 003821820
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 66 | JAN 01, 1963 | 00-382-1820 | 21884 ( LENS, OPTICAL INSTRUMENT ) |
REFERENCE DRAWINGS & PICTURES
DOUBLET
Cross Reference | NSN 6650-00-382-1820
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 3000095 | 53711 | NAVAL SEA SYSTEMS COMMAND |
| LD172589GP5 | 53711 | NAVAL SEA SYSTEMS COMMAND |
Technical Data | NSN 6650-00-382-1820
| 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 CONVEX AND PLANO-CONCAVE |
| DIAMETER | 1.535 INCHES NOMINAL |
| AXIAL THICKNESS | 0.650 INCHES NOMINAL AND 0.138 INCHES NOMINAL |
| COMPOUND LENS OVERALL AXIAL THICKNESS | 0.788 INCHES NOMINAL |
| COMPOUND LENS EDGE THICKNESS | 0.525 INCHES NOMINAL |
| EQUIVALENT FOCAL LENGTH | 2.215 INCHES |
| BACK FOCAL LENGTH | 2.275 INCHES |
| FRONT FOCAL LENGTH | 1.672 INCHES |
| REFRACTION INDEX | 1.5740 NOMINAL AND 1.6490 NOMINAL |
| ABBE CONSTANT | B57.700$$B33.800 |
| FSC APPLICATION DATA | FIRE CONTROL,TELESCOPE MK 74 |