|
|
|
National Stock Number:
1240-01-079-2960
Federal Supply Class:
1240
National Item Identification Number:
010792960
Description:
WINDOW,OPTICAL INSTRUMENT
Detail:
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.
|
Manufacturer Information:
| 12279236 | 19200 | US ARMY ARDEC RDECOM | | 12279236 | 19207 | U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM |
|
Techincal Specification:
| LENGTH | 83.500 MILLIMETERS NOMINAL | | PART NAME ASSIGNED BY CONTROLLING AGENCY | HEAD WINDOW | | MATERIAL | GLASS OPTICAL OVERALL | | SPECIAL FEATURES | PER SPECIFICATION MIL-G-174, GR B; TYPE: K5 OR EQUIVALENT; ND: 1.522; VD: 59.5; CTRG ERROR: 1 MINUTE; SURFACE TOLERANCES: SCRATCH = 80, DIG = 50 | | SPECIFICATION/STANDARD DATA | 96906-MIL-PRF-13830 GOVERNMENT STANDARD | | WIDTH | 5.00 MILLIMETERS NOMINAL | | SUPPLEMENTARY FEATURES | SURFACE TOLERANCES FOR POWER AND IRREGULARITY APPLY OVER AN 26MM DIAMETER WITHIN THE CLEAR APERTURE; MAXIMUM ALLOWABLE TRANSMITTED WAVEFRONT ERROR FOR ANY 26MM DIAMETER WITHIN THE CLEAR APERTURE IS 1/2 WAVE (FREQUENCY = 633NM) | | THICKNESS | 32.00 MILLIMETERS NOMINAL |
|
|