NSN 1240-00-599-9218
Part Details | OPTICAL INSTRUMENT WINDOW
1240-00-599-9218 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: 8567556, 1240-00-599-9218, 00-599-9218, 1240005999218, 005999218
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 12 | JAN 01, 1963 | 00-599-9218 | 10908 ( WINDOW, OPTICAL INSTRUMENT ) |
REFERENCE DRAWINGS & PICTURES
Cross Reference | NSN 1240-00-599-9218
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 8567556 | 19200 | US ARMY ARDEC RDECOM |
Technical Data | NSN 1240-00-599-9218
| Characteristic | Specifications |
|---|---|
| REFRACTION INDEX | 1.5160 MINIMUM AND 1.5180 MAXIMUM |
| DISPERSION | 64.000 ANGSTROMS MINIMUM AND 65.000 ANGSTROMS MAXIMUM |
| POLISHED SURFACE | BOTH |
| SURFACE FINISH | POLISHED |
| REFLECTION REDUCING SURFACE | BOTH |
| POLISHED PERIPHERY | NOT PROVIDED |
| WIDTH | 24.9 MILLIMETERS MINIMUM AND 25.4 MILLIMETERS MAXIMUM |
| LENGTH | 62.740 MILLIMETERS MINIMUM AND 63.240 MILLIMETERS MAXIMUM |
| THICKNESS | 4.800 MILLIMETERS MINIMUM AND 5.200 MILLIMETERS MAXIMUM |
| BEVEL ANGLE IN DEG | 45.000 NOMINAL |
| BEVEL DEPTH | 0.510 MILLIMETERS MAXIMUM |
| SPECIAL FEATURES | CORNERS ROUNDED 0.237IN. MAX 0.197IN. MIN. RADIUS; RESOLVING POWER TO BE 30 SEC OF ARC OR BETTER AS USED WHENSCANNING CLEAR APERTURE WITH A TELESCOPE OF AT LEAST A 0.5IN. APERTURE; LIGHT DEVIATION NOT TO EXCEED PLUS OR MINUS 2 MIN OF ARC; SPHERICAL POWER NOT TOEXCEED 7 MILLIDIOPTERS; ASTIGMATISM NOT TO EXCEED 3 MILLIDIOPTERS; SURFACE QUALITY 80-50 |
| FSC APPLICATION DATA | SIGHT PERISCOPE T42 |