NSN 6650-00-851-7613
Part Details | OPTICAL INSTRUMENT LENS
6650-00-851-7613 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: 7660500, 6650-00-851-7613, 00-851-7613, 6650008517613, 008517613
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 66 | JAN 01, 1962 | 00-851-7613 | 21884 ( LENS, OPTICAL INSTRUMENT ) |
REFERENCE DRAWINGS & PICTURES
DOUBLET
Cross Reference | NSN 6650-00-851-7613
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 7660500 | 19200 | US ARMY ARDEC RDECOM |
Technical Data | NSN 6650-00-851-7613
| Characteristic | Specifications |
|---|---|
| COMPOUND LENS STYLE | DOUBLET |
| INDIVIDUAL LENS STYLE | DOUBLE CONVEX AND MENISCUS DIVERGING |
| DIAMETER | 0.760 INCHES NOMINAL |
| AXIAL THICKNESS | 0.179 INCHES NOMINAL AND 0.099 INCHES NOMINAL |
| COMPOUND LENS OVERALL AXIAL THICKNESS | 0.278 INCHES NOMINAL |
| COMPOUND LENS EDGE THICKNESS | 0.228 INCHES NOMINAL |
| ELEMENT LEFT SURFACE RADIUS | 4.235 INCHES |
| ELEMENT RIGHT SURFACE RADIUS | 2.487 INCHES |
| EQUIVALENT FOCAL LENGTH | 6.135 INCHES |
| BACK FOCAL LENGTH | 6.008 INCHES |
| FRONT FOCAL LENGTH | 5.730 INCHES |
| REFRACTION INDEX | 1.5725 NOMINAL AND 1.6890 NOMINAL |
| ABBE CONSTANT | B57.400$$B68.900 |
| FSC APPLICATION DATA | TELESCOPE,PANORAMIC,T177,INTEGRATED WITH FIRE CONTROL EQUIPMENT |
| END ITEM IDENTIFICATION | TELESCOPE,PANORAMIC,M117 |