NSN 6650-00-491-0277
Part Details | OPTICAL INSTRUMENT LENS
6650-00-491-0277 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: 11151161, 11151161, 11151161, 11151161, 6650-00-491-0277, 00-491-0277, 6650004910277, 004910277
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 66 | OCT 01, 1969 | 00-491-0277 | 21884 ( LENS, OPTICAL INSTRUMENT ) |
REFERENCE DRAWINGS & PICTURES
DOUBLET
Cross Reference | NSN 6650-00-491-0277
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 11151161 | 52940 | FJW INDUSTRIES INC |
| 11151161 | 16331 | LOCKHEED MARTIN CORPORATIONDBA LOCKHEED MARTIN |
| 11151161 | 07076 | LOCKHEED MARTIN CORPORATIONDBA LOCKHEED MARTIN SIMULATION |
| 11151161 | 18876 | U S ARMY AVIATION AND MISSILECOMMAND |
Technical Data | NSN 6650-00-491-0277
| Characteristic | Specifications |
|---|---|
| COMPOUND LENS STYLE | DOUBLET |
| INDIVIDUAL LENS STYLE | DOUBLE CONVEX AND PLANO-CONCAVE |
| AXIAL THICKNESS | 0.384 INCHES NOMINAL AND 0.192 INCHES NOMINAL |
| COMPOUND LENS OVERALL AXIAL THICKNESS | 0.576 INCHES NOMINAL |
| COMPOUND LENS EDGE THICKNESS | 0.410 INCHES NOMINAL |
| ELEMENT LEFT SURFACE RADIUS | 9.092 INCHES |
| ELEMENT RIGHT SURFACE RADIUS | -6.925 INCHES AND 19.078 INCHES |
| EQUIVALENT FOCAL LENGTH | 15.000 INCHES |
| BACK FOCAL LENGTH | 14.730 INCHES |
| FRONT FOCAL LENGTH | 14.900 INCHES |
| REFRACTION INDEX | 1.5230 NOMINAL AND 1.7170 NOMINAL |
| ABBE CONSTANT | B59.600$$B29.500 |