NSN 6650-00-851-3918
Part Details | OPTICAL INSTRUMENT LENS
6650-00-851-3918 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: 8615943, 6650-00-851-3918, 00-851-3918, 6650008513918, 008513918
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 66 | JAN 01, 1963 | 00-851-3918 | 21884 ( LENS, OPTICAL INSTRUMENT ) |
REFERENCE DRAWINGS & PICTURES
DOUBLET
Cross Reference | NSN 6650-00-851-3918
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 8615943 | 19200 | US ARMY ARDEC RDECOM |
Technical Data | NSN 6650-00-851-3918
| 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 | MENISCUS DIVERGING AND DOUBLE CONVEX |
| DIAMETER | 1.496 INCHES NOMINAL |
| AXIAL THICKNESS | 0.150 INCHES NOMINAL AND 0.220 INCHES NOMINAL |
| COMPOUND LENS OVERALL AXIAL THICKNESS | 0.370 INCHES NOMINAL |
| COMPOUND LENS EDGE THICKNESS | 0.312 INCHES NOMINAL |
| ELEMENT LEFT SURFACE RADIUS | 6.831 INCHES |
| ELEMENT RIGHT SURFACE RADIUS | 2.160 INCHES |
| EQUIVALENT FOCAL LENGTH | 8.712 INCHES |
| BACK FOCAL LENGTH | 8.851 INCHES |
| REFRACTION INDEX | 1.6210 NOMINAL AND 1.5230 NOMINAL |
| ABBE CONSTANT | B36.200$$B58.600 |
| FSC APPLICATION DATA | TELESCOPE,ELBOW,INTEGRATED WITH FIRE CONTROL EQUIPMENT |