NSN 6650-00-757-7961
Part Details | OPTICAL INSTRUMENT LENS
6650-00-757-7961 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: 7577961, 6650-00-757-7961, 00-757-7961, 6650007577961, 007577961
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 66 | JAN 01, 1962 | 00-757-7961 | 21884 ( LENS, OPTICAL INSTRUMENT ) |
REFERENCE DRAWINGS & PICTURES
DOUBLET
Cross Reference | NSN 6650-00-757-7961
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 7577961 | 19200 | US ARMY ARDEC RDECOM |
Technical Data | NSN 6650-00-757-7961
| Characteristic | Specifications |
|---|---|
| COMPOUND LENS STYLE | DOUBLET |
| INDIVIDUAL LENS STYLE | DOUBLE CONVEX AND MENISCUS DIVERGING |
| DIAMETER | 2.218 INCHES NOMINAL |
| AXIAL THICKNESS | 0.772 INCHES NOMINAL AND 0.131 INCHES NOMINAL |
| COMPOUND LENS OVERALL AXIAL THICKNESS | 0.903 INCHES NOMINAL |
| COMPOUND LENS EDGE THICKNESS | 0.502 INCHES NOMINAL |
| ELEMENT LEFT SURFACE RADIUS | -1.709 INCHES AND 2.563 INCHES |
| ELEMENT RIGHT SURFACE RADIUS | -4.196 INCHES AND 1.709 INCHES |
| EQUIVALENT FOCAL LENGTH | 3.708 INCHES |
| BACK FOCAL LENGTH | 3.288 INCHES |
| REFRACTION INDEX | 1.5170 NOMINAL AND 1.6490 NOMINAL |
| ABBE CONSTANT | B64.500$$B33.800 |
| FSC APPLICATION DATA | TELESCOPE,INTEGRATED WITH FIRE CONTROL |