Part Details | OPTICAL INSTRUMENT LENS
6650-00-768-8777 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: 7688777, 6650-00-768-8777, 00-768-8777, 6650007688777, 007688777
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 66 | JAN 01, 1962 | 00-768-8777 | 21884 ( LENS, OPTICAL INSTRUMENT ) |
REFERENCE DRAWINGS & PICTURES
DOUBLE CONVEX
DOUBLE CONVEX
Cross Reference | NSN 6650-00-768-8777
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 7688777 | 19200 | US ARMY ARDEC RDECOM |
Technical Data | NSN 6650-00-768-8777
| Characteristic | Specifications |
|---|---|
| SINGLE LENS STYLE | DOUBLE CONVEX |
| DIAMETER | 1.297 INCHES MINIMUM AND 1.300 INCHES MAXIMUM |
| AXIAL THICKNESS | 0.290 INCHES MINIMUM AND 0.310 INCHES MAXIMUM |
| ELEMENT LEFT SURFACE RADIUS | 3.100 INCHES |
| ELEMENT RIGHT SURFACE RADIUS | 2.100 INCHES |
| EQUIVALENT FOCAL LENGTH | 2.501 INCHES |
| BACK FOCAL LENGTH | 2.449 INCHES |
| REFRACTION INDEX | 1.6170 NOMINAL |
| ABBE CONSTANT | 55.000 |
| SPECIAL FEATURES | EDGES CHAMFERED 0.010 TO 0.020 IN. BY 45 DEG. BOTH SURFACES COATED WITH MAGNESIUM FLUORIDE. RIM GROUND. |
| FSC APPLICATION DATA | PERISCOPE,TANK |