NSN 6650-00-820-4577
Part Details | OPTICAL INSTRUMENT LENS
6650-00-820-4577 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: 68701, 68-701, 68701, 68-701, 6650-00-820-4577, 00-820-4577, 6650008204577, 008204577
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 66 | JAN 01, 1963 | 00-820-4577 | 21884 ( LENS, OPTICAL INSTRUMENT ) |
REFERENCE DRAWINGS & PICTURES
DOUBLET
Cross Reference | NSN 6650-00-820-4577
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 68-701 | 02622 | AMERICAN OPTICAL CO |
| 68-701 | 78039 | LEICA INCSURVEYING AND PHOTOGRAMMETRY SYSTEMS |
Technical Data | NSN 6650-00-820-4577
| Characteristic | Specifications |
|---|---|
| MATERIAL | GLASS |
| COMPOUND LENS STYLE | DOUBLET |
| INDIVIDUAL LENS STYLE | PLANO-CONVEX AND PLANO-CONCAVE |
| DIAMETER | 50.000 MILLIMETERS NOMINAL |
| AXIAL THICKNESS | 7.000 INCHES NOMINAL AND 4.500 INCHES NOMINAL |
| COMPOUND LENS OVERALL AXIAL THICKNESS | 11.500 MILLIMETERS NOMINAL |
| COMPOUND LENS EDGE THICKNESS | 9.000 MILLIMETERS NOMINAL |
| ELEMENT LEFT SURFACE RADIUS | 72.460 MILLIMETERS AND 485.290 MILLIMETERS |
| ELEMENT RIGHT SURFACE RADIUS | 485.290 MILLIMETERS AND 158.060 MILLIMETERS |
| EQUIVALENT FOCAL LENGTH | 23.416 CENTIMETERS |
| BACK FOCAL LENGTH | 22.030 CENTIMETERS |
| FRONT FOCAL LENGTH | 24.145 CENTIMETERS |
| REFRACTION INDEX | 1.6170 NOMINAL AND 1.6890 NOMINAL |
| ABBE CONSTANT | B55.000$$B30.900 |