NSN 6650-00-768-8718
Part Details | OPTICAL INSTRUMENT LENS
6650-00-768-8718 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: 7688718, 6650-00-768-8718, 00-768-8718, 6650007688718, 007688718
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 66 | JAN 01, 1962 | 00-768-8718 | 21884 ( LENS, OPTICAL INSTRUMENT ) |
REFERENCE DRAWINGS & PICTURES
DOUBLET
Cross Reference | NSN 6650-00-768-8718
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 7688718 | 19200 | US ARMY ARDEC RDECOM |
Technical Data | NSN 6650-00-768-8718
| Characteristic | Specifications |
|---|---|
| COMPOUND LENS STYLE | DOUBLET |
| INDIVIDUAL LENS STYLE | DOUBLE CONVEX AND DOUBLE CONCAVE |
| DIAMETER | 1.062 INCHES MINIMUM AND 1.065 INCHES MAXIMUM |
| AXIAL THICKNESS | 0.108 INCHES MINIMUM AND 0.128 INCHES MAXIMUM AND 0.384 INCHES MINIMUM AND 0.404 INCHES MAXIMUM |
| COMPOUND LENS OVERALL AXIAL THICKNESS | 0.492 INCHES MINIMUM AND 0.532 INCHES MAXIMUM |
| COMPOUND LENS EDGE THICKNESS | 0.469 INCHES NOMINAL |
| ELEMENT LEFT SURFACE RADIUS | 1.575 INCHES |
| ELEMENT RIGHT SURFACE RADIUS | 1.087 INCHES |
| EQUIVALENT FOCAL LENGTH | 35.620 INCHES |
| REFRACTION INDEX | 1.5110 NOMINAL AND 1.7200 NOMINAL |
| ABBE CONSTANT | B63.500$$B29.300 |
| SPECIAL FEATURES | FRONT AND BACK SURFACES COATED WITH MAGNESIUM FLUORIDE. ALL EDGES CHAMFERED 0.020 IN. MIN. BY 45 DEG. RIM AND CHAMFERS GROUND. |
| FSC APPLICATION DATA | PERISCOPE,TANK |