Part Details | OPTICAL INSTRUMENT WINDOW
1240-00-171-7897 A color free item of transparent or translucent material, usually optical glass, having specific light dispersive and refractive properties. This item must have two plane-parallel surfaces and is designed for use in an optical instrument to provide a barrier to foreign matter and/or permit light transmission in or to the optical system.
Alternate Parts: 181146PC9, 1240-00-171-7897, 00-171-7897, 1240001717897, 001717897
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 12 | JAN 01, 1963 | 00-171-7897 | 10908 ( WINDOW, OPTICAL INSTRUMENT ) |
REFERENCE DRAWINGS & PICTURES
Cross Reference | NSN 1240-00-171-7897
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 181146PC9 | 10001 | NAVAIR AND NAVSEA MANAGEDORIGINAL DESIGN ACTIVITY DWG NOT |
Technical Data | NSN 1240-00-171-7897
| Characteristic | Specifications |
|---|---|
| REFRACTION INDEX | 1.5171 NOMINAL |
| DISPERSION | 64.5 ANGSTROMS NOMINAL |
| POLISHED SURFACE | BOTH |
| REFLECTION REDUCING SURFACE | BOTH |
| POLISHED PERIPHERY | NOT PROVIDED |
| DIAMETER | 45.960 MILLIMETERS MINIMUM AND 48.000 MILLIMETERS MAXIMUM |
| THICKNESS | 3.000 MILLIMETERS NOMINAL |
| BEVEL ANGLE IN DEG | 45.000 NOMINAL |
| BEVEL DEPTH | 1.000 MILLIMETERS NOMINAL |
| FSC APPLICATION DATA | PERISCOPE MK 23 MOD 0 AND MK 24 MOD 0 |