NSN 6650-00-393-0439
Part Details | OPTICAL INSTRUMENT LENS
6650-00-393-0439 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: 11733421, 6650-00-393-0439, 00-393-0439, 6650003930439, 003930439
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 66 | APR 01, 1974 | 00-393-0439 | 21884 ( LENS, OPTICAL INSTRUMENT ) |
REFERENCE DRAWINGS & PICTURES
DOUBLET
Cross Reference | NSN 6650-00-393-0439
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 11733421 | 19200 | US ARMY ARDEC RDECOM |
Technical Data | NSN 6650-00-393-0439
| Characteristic | Specifications |
|---|---|
| COMPOUND LENS STYLE | DOUBLET |
| INDIVIDUAL LENS STYLE | MENISCUS AND MENISCUS CONVERGING |
| DIAMETER | 1.557 INCHES MINIMUM AND 1.560 INCHES MAXIMUM |
| AXIAL THICKNESS | 0.168 INCHES NOMINAL AND 0.366 INCHES NOMINAL |
| COMPOUND LENS OVERALL AXIAL THICKNESS | 0.524 INCHES MINIMUM AND 0.544 INCHES MAXIMUM |
| ELEMENT LEFT SURFACE RADIUS | 0.580 INCHES |
| ELEMENT RIGHT SURFACE RADIUS | 1.073 INCHES |
| EQUIVALENT FOCAL LENGTH | -11.460 INCHES |
| BACK FOCAL LENGTH | -9.461 INCHES |
| REFRACTION INDEX | 1.7850 NOMINAL AND 1.6200 NOMINAL |
| ABBE CONSTANT | B25.800$$B60.300 |