NSN 6650-00-520-4757
Part Details | OPTICAL INSTRUMENT LENS
6650-00-520-4757 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: 5204757, 6650-00-520-4757, 00-520-4757, 6650005204757, 005204757
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 66 | JAN 01, 1963 | 00-520-4757 | 21884 ( LENS, OPTICAL INSTRUMENT ) |
REFERENCE DRAWINGS & PICTURES
DOUBLET
Cross Reference | NSN 6650-00-520-4757
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 5204757 | 19207 | U S ARMY TANK AUTOMOTIVE COMMANDAMSTA-IM-MM |
Technical Data | NSN 6650-00-520-4757
| Characteristic | Specifications |
|---|---|
| COMPOUND LENS STYLE | DOUBLET |
| INDIVIDUAL LENS STYLE | DOUBLE CONVEX AND MENISCUS DIVERGING |
| DIAMETER | 0.689 INCHES NOMINAL |
| AXIAL THICKNESS | 0.335 INCHES NOMINAL AND 0.430 INCHES NOMINAL |
| COMPOUND LENS OVERALL AXIAL THICKNESS | 0.394 INCHES NOMINAL |
| COMPOUND LENS EDGE THICKNESS | 0.211 INCHES NOMINAL |
| ELEMENT LEFT SURFACE RADIUS | -0.629 INCHES AND 0.473 INCHES |
| ELEMENT RIGHT SURFACE RADIUS | -0.473 INCHES AND 3.351 INCHES |
| EQUIVALENT FOCAL LENGTH | 1.141 INCHES |
| BACK FOCAL LENGTH | 0.905 INCHES |
| REFRACTION INDEX | 1.5411 NOMINAL AND 1.6170 NOMINAL |
| ABBE CONSTANT | B36.600$$B59.900 |