Part Details | OPTICAL INSTRUMENT LENS
6650-00-518-2961 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: 5182961, 6650-00-518-2961, 00-518-2961, 6650005182961, 005182961
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 66 | JAN 01, 1963 | 00-518-2961 | 21884 ( LENS, OPTICAL INSTRUMENT ) |
REFERENCE DRAWINGS & PICTURES
DOUBLET
Cross Reference | NSN 6650-00-518-2961
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 5182961 | 19200 | US ARMY ARDEC RDECOM |
Technical Data | NSN 6650-00-518-2961
| Characteristic | Specifications |
|---|---|
| MATERIAL | GLASS OPTICAL |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-G-174, CLASS 1, GRADE C MIL SPEC SINGLE MATERIAL RESPONSE |
| COMPOUND LENS STYLE | DOUBLET |
| INDIVIDUAL LENS STYLE | DOUBLE CONVEX AND MENISCUS DIVERGING |
| DIAMETER | 1.181 INCHES NOMINAL |
| AXIAL THICKNESS | 0.079 INCHES NOMINAL AND 0.496 INCHES NOMINAL |
| COMPOUND LENS OVERALL AXIAL THICKNESS | 0.575 INCHES NOMINAL |
| COMPOUND LENS EDGE THICKNESS | 0.425 INCHES NOMINAL |
| ELEMENT LEFT SURFACE RADIUS | 59.206 MILLIMETERS |
| ELEMENT RIGHT SURFACE RADIUS | 0.841 INCHES |
| EQUIVALENT FOCAL LENGTH | 2.596 INCHES |
| BACK FOCAL LENGTH | 2.660 INCHES |
| FRONT FOCAL LENGTH | 2.085 INCHES |
| REFRACTION INDEX | 1.6490 NOMINAL AND 1.5720 NOMINAL |
| ABBE CONSTANT | B33.800$$B57.400 |
| FSC APPLICATION DATA | TELESCOPE,ELBOW,INTEGRATED WITH FIRE CONTROL EQUIP |