NSN 6650-00-757-7957
Part Details | OPTICAL INSTRUMENT LENS
6650-00-757-7957 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: 7577957, 6650-00-757-7957, 00-757-7957, 6650007577957, 007577957
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 66 | JAN 01, 1962 | 00-757-7957 | 21884 ( LENS, OPTICAL INSTRUMENT ) |
REFERENCE DRAWINGS & PICTURES
DOUBLET
Cross Reference | NSN 6650-00-757-7957
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 7577957 | 19200 | US ARMY ARDEC RDECOM |
Technical Data | NSN 6650-00-757-7957
| Characteristic | Specifications |
|---|---|
| COMPOUND LENS STYLE | DOUBLET |
| INDIVIDUAL LENS STYLE | MENISCUS DIVERGING AND DOUBLE CONVEX |
| DIAMETER | 1.311 INCHES NOMINAL |
| AXIAL THICKNESS | 0.123 INCHES NOMINAL AND 0.289 INCHES NOMINAL |
| COMPOUND LENS OVERALL AXIAL THICKNESS | 0.412 INCHES NOMINAL |
| COMPOUND LENS EDGE THICKNESS | 0.319 INCHES NOMINAL |
| ELEMENT LEFT SURFACE RADIUS | 7.317 INCHES AND 2.252 INCHES |
| ELEMENT RIGHT SURFACE RADIUS | -2.252 INCHES AND -3.374 INCHES |
| EQUIVALENT FOCAL LENGTH | 5.502 INCHES |
| FRONT FOCAL LENGTH | 5.303 INCHES |
| REFRACTION INDEX | 1.6490 NOMINAL AND 1.5170 NOMINAL |
| ABBE CONSTANT | B33.800$$B64.500 |
| FSC APPLICATION DATA | PERISCOPE,M16H,INTEGRATED WITH FIRE CONTROL EQUIPMENT |