NSN 6650-00-520-4255
Part Details | OPTICAL INSTRUMENT LENS
6650-00-520-4255 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: 5204255, 6650-00-520-4255, 00-520-4255, 6650005204255, 005204255
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 66 | JAN 01, 1963 | 00-520-4255 | 21884 ( LENS, OPTICAL INSTRUMENT ) |
REFERENCE DRAWINGS & PICTURES
DOUBLET
Cross Reference | NSN 6650-00-520-4255
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 5204255 | 19200 | US ARMY ARDEC RDECOM |
Technical Data | NSN 6650-00-520-4255
| Characteristic | Specifications |
|---|---|
| MATERIAL | GLASS OPTICAL |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-G-174, CLASS 1, GRADE C MIL SPEC SINGLE MATERIAL RESPONSE |
| COMPOUND LENS STYLE | DOUBLET |
| INDIVIDUAL LENS STYLE | DOUBLE CONVEX AND MENISCUS DIVERGING |
| DIAMETER | 2.048 INCHES NOMINAL |
| AXIAL THICKNESS | 0.394 INCHES NOMINAL AND 0.177 INCHES NOMINAL |
| COMPOUND LENS OVERALL AXIAL THICKNESS | 0.571 INCHES NOMINAL |
| COMPOUND LENS EDGE THICKNESS | 0.406 INCHES NOMINAL |
| ELEMENT LEFT SURFACE RADIUS | 5.122 INCHES |
| ELEMENT RIGHT SURFACE RADIUS | 2.785 INCHES |
| EQUIVALENT FOCAL LENGTH | 7.598 INCHES |
| BACK FOCAL LENGTH | 7.348 INCHES |
| REFRACTION INDEX | 1.5110 NOMINAL AND 1.6170 NOMINAL |
| ABBE CONSTANT | B63.500$$B36.600 |
| FSC APPLICATION DATA | BINOCULAR,FIRE CONTROL |