NSN 6650-00-622-4989
Part Details | OPTICAL INSTRUMENT LENS
6650-00-622-4989 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: 8289292, 6650-00-622-4989, 00-622-4989, 6650006224989, 006224989
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 66 | JAN 01, 1963 | 00-622-4989 | 21884 ( LENS, OPTICAL INSTRUMENT ) |
REFERENCE DRAWINGS & PICTURES
DOUBLET
Cross Reference | NSN 6650-00-622-4989
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 8289292 | 19200 | US ARMY ARDEC RDECOM |
Technical Data | NSN 6650-00-622-4989
| Characteristic | Specifications |
|---|---|
| COMPOUND LENS STYLE | DOUBLET |
| INDIVIDUAL LENS STYLE | DOUBLE CONVEX AND MENISCUS CONVERGING |
| DIAMETER | 1.447 INCHES MINIMUM AND 1.450 INCHES MAXIMUM |
| AXIAL THICKNESS | 0.300 INCHES NOMINAL AND 0.120 INCHES NOMINAL |
| COMPOUND LENS OVERALL AXIAL THICKNESS | 0.420 INCHES NOMINAL |
| COMPOUND LENS EDGE THICKNESS | 0.301 INCHES NOMINAL |
| ELEMENT LEFT SURFACE RADIUS | -1.860 INCHES AND 6.825 INCHES |
| ELEMENT RIGHT SURFACE RADIUS | -1.860 INCHES AND 3.911 INCHES |
| EQUIVALENT FOCAL LENGTH | 6.020 INCHES |
| BACK FOCAL LENGTH | 5.932 INCHES |
| FRONT FOCAL LENGTH | 5.512 INCHES |
| REFRACTION INDEX | 1.5690 NOMINAL AND 1.6890 NOMINAL |
| ABBE CONSTANT | B51.600$$B30.900 |