NSN 6650-00-757-7959
Part Details | OPTICAL INSTRUMENT LENS
6650-00-757-7959 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: 7577959, 6650-00-757-7959, 00-757-7959, 6650007577959, 007577959
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 66 | JAN 01, 1962 | 00-757-7959 | 21884 ( LENS, OPTICAL INSTRUMENT ) |
REFERENCE DRAWINGS & PICTURES
DOUBLET
Cross Reference | NSN 6650-00-757-7959
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 7577959 | 19200 | US ARMY ARDEC RDECOM |
Technical Data | NSN 6650-00-757-7959
| Characteristic | Specifications |
|---|---|
| COMPOUND LENS STYLE | DOUBLET |
| INDIVIDUAL LENS STYLE | PLANO-CONVEX AND PLANO-CONCAVE |
| LENGTH | 0.884 INCHES NOMINAL |
| DIAMETER | 1.343 INCHES NOMINAL |
| AXIAL THICKNESS | 0.468 INCHES NOMINAL AND 0.295 INCHES NOMINAL |
| COMPOUND LENS OVERALL AXIAL THICKNESS | 0.768 INCHES NOMINAL |
| COMPOUND LENS EDGE THICKNESS | 0.884 INCHES NOMINAL |
| ELEMENT LEFT SURFACE RADIUS | -98.717 INCHES AND 1.376 INCHES |
| ELEMENT RIGHT SURFACE RADIUS | -98.717 INCHES AND -0.910 INCHES |
| EQUIVALENT FOCAL LENGTH | 6.390 INCHES |
| BACK FOCAL LENGTH | 5.124 INCHES |
| REFRACTION INDEX | 1.5725 NOMINAL AND 1.6490 NOMINAL |
| ABBE CONSTANT | B57.400$$B33.800 |
| FSC APPLICATION DATA | PERISCOPE,INTEGRATED WITH FIRE CONTROL EQUIPMENT |