NSN 6650-00-346-8211
Part Details | OPTICAL INSTRUMENT LENS
6650-00-346-8211 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: 8567555, 6650-00-346-8211, 00-346-8211, 6650003468211, 003468211
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 66 | JAN 01, 1963 | 00-346-8211 | 21884 ( LENS, OPTICAL INSTRUMENT ) |
REFERENCE DRAWINGS & PICTURES
DOUBLET
Cross Reference | NSN 6650-00-346-8211
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 8567555 | 19200 | US ARMY ARDEC RDECOM |
Technical Data | NSN 6650-00-346-8211
| 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 | 1.220 INCHES NOMINAL |
| AXIAL THICKNESS | 0.3662 INCHES NOMINAL AND 0.0866 INCHES NOMINAL |
| COMPOUND LENS OVERALL AXIAL THICKNESS | 0.429 INCHES MINIMUM AND 0.469 INCHES MAXIMUM |
| COMPOUND LENS EDGE THICKNESS | 0.281 INCHES NOMINAL |
| ELEMENT LEFT SURFACE RADIUS | 1.9405 INCHES AND -1.1957 INCHES |
| ELEMENT RIGHT SURFACE RADIUS | -1.1957 INCHES AND -2.7240 INCHES |
| EQUIVALENT FOCAL LENGTH | 2.603 INCHES |
| BACK FOCAL LENGTH | 2.491 INCHES |
| REFRACTION INDEX | 1.5170 NOMINAL AND 1.6490 NOMINAL |
| ABBE CONSTANT | B64.500$$B33.800 |
| FSC APPLICATION DATA | SIGHT PERISCOPE M25,INTEGRATED WITH FIRE CONTROL EQUIPMENT |