Part Details | OPTICAL INSTRUMENT LENS
6650-00-157-4138 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: G8110PC9, 799638, 203034PC9, 799638PC1, 6650-00-157-4138, 00-157-4138, 6650001574138, 001574138
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 66 | JAN 01, 1963 | 00-157-4138 | 21884 ( LENS, OPTICAL INSTRUMENT ) |
REFERENCE DRAWINGS & PICTURES
DOUBLET
Cross Reference | NSN 6650-00-157-4138
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| G8110PC9 | 74067 | KEUFFEL AND ESSER CO |
| 799638 | 10001 | NAVAIR AND NAVSEA MANAGEDORIGINAL DESIGN ACTIVITY DWG NOT |
| 203034PC9 | 10001 | NAVAIR AND NAVSEA MANAGEDORIGINAL DESIGN ACTIVITY DWG NOT |
| 799638PC1 | 53711 | NAVAL SEA SYSTEMS COMMAND |
Technical Data | NSN 6650-00-157-4138
| Characteristic | Specifications |
|---|---|
| COMPOUND LENS STYLE | DOUBLET |
| INDIVIDUAL LENS STYLE | DOUBLE CONVEX AND MENISCUS DIVERGING |
| DIAMETER | 31.0 MILLIMETERS NOMINAL |
| AXIAL THICKNESS | 6.0 MILLIMETERS NOMINAL AND 3.0 MILLIMETERS NOMINAL |
| COMPOUND LENS OVERALL AXIAL THICKNESS | 9.0 MILLIMETERS NOMINAL |
| ELEMENT LEFT SURFACE RADIUS | 117.4 MILLIMETERS AND -45.1 MILLIMETERS |
| ELEMENT RIGHT SURFACE RADIUS | 45.1 MILLIMETERS AND 306.3 MILLIMETERS |
| EQUIVALENT FOCAL LENGTH | 19.430 CENTIMETERS |
| BACK FOCAL LENGTH | 19.250 CENTIMETERS |
| REFRACTION INDEX | 1.5055 NOMINAL AND 1.5105 NOMINAL |
| ABBE CONSTANT | B43.500$$B63.700 |
| END ITEM IDENTIFICATION | RANGEFINDER MK42 |