1、MIL-B-50762 32 = 7777306 0330733 4 ZS -/- _- MIL-B-50762 (Mu) 10 October 1972 MILITARY SPECIFICATION BODY General Specification Governing the Manufacture, Assembly, and Inspection of Fire Control Materiel, General Specifi- cation Governing the Manufacture and Inspection of Parts, Equipment and Tools
2、 for Army Materiel, Packaging and Packing of Inspection Equipment, Acquisition, Maintenance and Disposition of Sampling Procedures and Tables for Quality Assurance Terms and Definitions Test Methods for Electronic and Electrical Inspection by Attributes Component Parts FSC 1240 . 4 Provided by IHSNo
3、t for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-B-50762 32 W 7777906 0330734 6 W - MIL-B-50762 (MJ) DRAWINGS U.S. Amy, Frankford Arsenal F8270621 F8298786 F8565556 F85 77787 8298789 F10539179 A10539180 A10539181 F11743800 F11729724 F11732100 PACKAGING DATA SHEET
4、11 743 800 Test Fixture for Infrared Body Assembly, Support, Test Fixture Accessories Projector Collimating, Parabolic Pressure Tester, Two-Station Set-up Instructions for Universal Test Stand Calibration Standard or Infrared Body Assembly, Periscopes :M32 and K36 Set-up Instructions for Test Fixtur
5、e, F8270621, Infrared Body Assembly - M32 and M36 F8270621, Infrared Body Assembly - M32 and M36 Periscopes :M32 and M36 Operating Instructions for Test Fixture Body Assembly: 11743800 Gage Interchangeability, Maximum Gage Interchangeability, Minimum *Packaging of Body Assembly: 11743800 (Copies of
6、specifications, standards, drawings and packaging data sheets required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) 3. RE(LUIREMF.NTS 3.1 Fabrication.- The body assembly shall be manufactured
7、 in accordance with Drawing F11743800 and drawings pertaining thereto. 3.2 Interchangeability.- The body assembly shall be capable of insertion into and removal from the gages specified in 4.6.12. / 3.3 General specifications.- The contractor shall be responsible for adherence to, and compliance wit
8、h the following requirements of MIL-F- 13926 a. Order of precedence b. Dimensions and tolerances C. Inorganic protective surface finishes d. Part identification and marking e. Workmanship 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-B-50762
9、 LE! = 9999906 0330715 MIL-B-50762 (MU) 3.4 Environmental. 3.4.1 Storage temperature.- The body assembly shall show no evidence of cement separation, glass breakage or other physical failure, and shall meet all the requirements of this specification at standard ambient temperature (plus 60 to 90F) a
10、fter having been exposed and thermally stabilized at ambient temperatures of minus 80 to plus 160F. 3.4.2 Operating temperatures.- The body assembly shall meet the applicable requirements of 3.5 while exposed at ambient temperatures of minus 40 and plus 150F. and thermally stabilized 3.5 Torque. 3.5
11、.1 Diopter movement.- The running torque required to rotate the diopter movement through the range specified in 3.6.4.7 shall be within the limits of 1.5 and 6.0 lb-ins when checked at standard temperature. When checked at the temperature conditions specified in 3.4.2, the running torque shall not e
12、xceed 15 lb-ins. 3.5.2 Focusing mechanism.- The running torque required to rotate When Ring 8620059 through the range specified in 3.6.3 shall be within the limits of 4.0 and 14.0 lb-ins when checked at standard temperature. checked at the temperature conditions specified in 3.4.2, the running torqu
13、e shall not exceed 24.0 lb-ins. 3.5.3 Disengagement of boresight knob locks.- The direct force required to disengage each boresight knob from the lock position shall be within the limits of 2.0 to 5.0 pounds (lbs) when checked at standard temperature. When checked at the temperature conditions speci
14、fied in 3.4.2, the direct force shall not exceed 9.0 lbs. 3.5.4 Rotation of boresight knobs.- The running torque required to rotate each boresight knob through the range specified in 3.6.4,3 shall be within the limits of 0.5 and 5.0 lb-ins when checked at standard tempera- ture. When checked at the
15、temperature conditions specified in 3.4.2 the running torque shall not exceed 8.0 lb-ins. 3.5.5 Electrical switch.- This requirement shall be met at standard temperature and the temperature conditions specified in 3.4.2. Knob Y2391528-OiilB shall be manually operable to Position Switch 10516592 from
16、 the “OFFII to “24V ON“ positions. 3.6 Perf ormance. NOTE: The following references apply throughout this specification. Datum Plane llX1l and Reference Line ItYli as shown on Sheet 1 of Drawing F11743800. 3 -. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from
17、 IHS-,-,- MIL-B-50762 32 m 7777706 0330736 T m NIL-B-50762 (HU) 3.6.1 Dielectric strength (prior to installing image tube and power pack).- There shall be no puncture of insulation, no visible evidence of damage due to corona, or decrease in dielectric strength when a potential of 20,000 volts dc, p
18、lus or minus 500 volts, is applied between ground and image tube or power supply contact for a period of not less than one minute. 3.6.2 Electrical characteristics. 3.6.2.1 Image converter tube.- The inage converter tube shall be energized by the application of +24 2 6.0 vdc to the contact for the I
19、R power supply (reference Drawing F11743800). 3.6.2.2 Reticle projector lamp.- The reticle projector lamp shall be energized by the application of 3-24 2 6.0 vdc to the contact for the reticle lamp (reference Drawing F11743800). 3.6.2.3 Reticle illumination.- Kith A minimum of 18 and a maximum of 30
20、 volts energizing the projector lamp, the reticle markings shall appear clearly defined when viewing through the eyepiece with the image tube energized (see 3.6.2.1). 3.6.2.4 Image steadiness.- There shall be no visible flicker, no movement of the image nor audible sparking whm observed for 1 minute
21、. This observation shall be made after the expiration of 15 seconds tube stabilization time. 3.6.3 Objective focusing range.- Rotation of Ring 8620059 shall cause the objective to bring targets from 200 meters to 1200 meters into focus . 3.6.4 Collimation,- These requirements shall be met prior to m
22、eeting the requirements of 3.6.5. 3.6.4.1 Previbration setting.- An incident line of sight shall be provided which is perpendicular to Datum Plan llXll, within 0.2 mil. Co- incidence of this iine of sight with the instrument reticle shall be es- tablished by rotation of the boresight knobs. 3.6.4.2
23、Reticle movement.- Reticle (boresight cross) movement shall be measured against an external target from the collimated setting of 3.6.4.1 to.meet the requirements of 3.6.4.2.1 and 3.6.4.2.2. 3.6.4.2.1 Elevation.- Clockwise rotation of the elevation knob shall mve the reticle, in a direction towards
24、the knob, a minimum of 7.0 mils from the collimated setting. Counterclockwise rotation of the elevation knob shall move the reticle, in a direction away from the knob, a minimum of 7.0 mils from the collimated setting. 3.6.4.2.2 Deflection.- Clockwise rotation of the deflection knob shall move the r
25、eticle, in a direction towards the knob, a minimum of 7.0 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-E-507b2 32 7777706 0330737 3 MIL-B-50762 (MU) mils from the collimated setting. deflection knob shall move the reticle, in a direction awa
26、y from the knob, a minimum of 7.0 mils frm the collimated setting. Counterclockwise rotation of the 3.6.4.3 Knob rotation.- Continuous movement of the reticle shall be evident until limited by positive engagement of clockwise and counterclock- wise stops in each boresight knob. 3.6.4.4 Line of sight
27、 variation.- Variation in the line of sight in elevation, as the deflection knob is rotated by at least 7.0 mils in each direction from the collimated setting of 3.6.4.1, shall not exceed 0.1 mil (total variation not to exceed 0.2 mil). 3.6.4.5 Reticle shift,- Disengagement or reversal of either kno
28、b shall not cause the line of sight to shift by more than 0.1 mil in a direction perpendicular to the intended motion. 3.6.4.6 Boresight backlash.- Backlash in each boresight mechanism shall not exceed 0.10 mil. 3.6.4.7 Eyepiece focus.- The diopter scale index shall index zero within plus or minus 1
29、/4 diopter when the screen is brought into best focus with the aid of a dioptometer. shall have at least 3.0 diopter movement in both directions as read on From this best focus the eyepiece the eyepiece scale. 3.6.4.8 Diopter backlash.- Backlash in the diopter movement shall not exceed 118 diopter.
30、3.6.4.9 Image tilt.- face fiXIt and perpendicular to Reference Line iiYll shall emerge from the eye- piece parallel to the horizontal reticle line within 1.0 degree of arc. The image of a line originally parallel to Sur- 3.6.4.10 Parallelism of reticle and image.- The image of a target line which is
31、 originally parallel to Surface llXtl and perpendicular to Reference Line IiYtl shall emerge from the eyepiece parallel to the horizontal reticle line within 1.0 degree of arc. 3.6.4.11 Resolution.- The resolution shall be 1 minute of arc or less. Resolution consists of detectable line structure and
32、 proper line count in all four meridians. Eyepiece focus shift between any two meridians shall not exceet 0.25 diopter. 3.6.5 Vibration.- This requirement shall be met with the image The body assembly shall be vibrated in a vertical converter tube and reticle projector lamp energized in accordance w
33、ith 3.6.2.1 and 3.6.2.2. plane at a constant frequency of 30 cycles per second (cps) with an amplitude of 1/16 inch (1/8 inch total excursion) for a period of 5 minutes plus or minus 15 seconds. There shall be no failure or flicker of light emission from the image converter tube and reticle projecto
34、r lamp during 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I MIL-B-50762 12 W 9999906 0330738 3 NIL-B-50762 (MU) vibration and the body assembly shall show no evidence of physical failure subsequent to vibration. Foltowing the vibration test, th
35、e body assembly shall meet all remaining requirements herein. 3.6.6 Post vibration collimation.- The original collimation pre- vibration settings established in 3.6.4.1 shall notdeviate more than 0.1 mil (including fixture error) due to vibration, as observed through the eye- piece * 3.6.7 Electron
36、image shift.- After vibration, the IR body shall be The collimation subjected to ten cycles of I1ONt* and ItOFFIt rated voltage, the voltage being applied for 15 seconds and removed for 10 seconds. of the body assembly at the expiration of each ?ONit period shall not deviate more than 0.10 mil. 3.6.
37、8 Image centering.- An incident line of sight perpendicular to Datum Plane fiXfl (within 0.2 mil) shall appear centered in the eyepiece field of view within 5.0 degrees relative to the axis defined by the cylindrical diameter of the eyepiece diopter scale ring. 3.6.9 Cleanliness. a. Defects.- There
38、shall be no evidence of moisture, grease, fingerprints, condensates, fractures and adhesive separations on any glass component when viewing through either end. b. - Dirt.- When viewing through the eyepiece with the image converter tube energized, there shall be no more than five particles visible on
39、 the screen surface. apparent width of the reticle line. The size of any particle shall not exceed the 3.6.10 Sealin of tke diopter knob, the test is nullified and shall be repeatec. 4.6.4.12 Image tilt.- Position an auxiliary telescope containing a crossline reticle pattern at the body asseml.ly ey
40、epiece. reticle line of the auxiliary telescope shall be aligned plumb when in the test position on a qualified surface. telescope, view through the eyepiece of the body assembly and establish one extremity of the telescope vertical reticle line coincident to the vertical target image line. The imag
41、e of the vertical target line shall be parallel to the telescope vertical reticle line within the tolerance specified in 3.6.4.9 as measured on the targer:. The vertical With aid of the auxiliary 4.6.4.13 Parallelism of image and retic-2.- Perform this test while observing through the body assembly
42、eyepiece with the unaided eye. tion one extremity of the body assembly vertical reticle line coincident to the vertical target image line. The body assembly vertical reticle line shall be parallel to the vertical farget image line within the tolerance specified in 3.6.4.10, as measured on the target
43、. Poci- 16 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-B-5Q762 12 m 33;97770b 0330727 8 m MIL-B-50762 (MU) 4.6.5 Resolution.- Remove the body assembly from the testing equip- ment. The test: for resolution shall be performed utilizing a suppo
44、rting medium capable of receiving the body assembly and a resolving power chart or a wall target representing the angular subtense for minutes of arc specified in 3.6.4.11. be as specified in the llResolution Test“ of MIL-0-13830 and contain four lines sets as shown on Figure 1 therein. Disregard ce
45、nter numeral. The target shall be illuminated by means of a filtered tungsten lamp. The filter shall not pass visible light rays below 0.65 microns. Place the body assembly on the supporting medium and position it in a horizontal plane. Energize the image tube of the body assembly from a power sourc
46、e capable of supplying and maintaining 24 volts DC. The image tube shall be permitted a stabilization period of 15 seconds prior to conducting the resolution test of the infrared optical system. Upon completion of the stabilization period, view through the body assembly eyepiece with the unaided eye
47、 and obtain best focus of the resolving power chart by means of the eyepiece diopter adjustment knob. Any change in the diopter readings by adjustment of the eyepiece diopter knob to obtain the detect- able line structure and proper line count in all four meridians shall be recorded, as measured on
48、the knob scale. The difference between the recorded readings for any two meridians shall not exceed the value specified in 3.6.4.11. assembly shall be subjected to the vibration test in 4.6.6. Construction of the resolving power chart shall Upon successful completion of this test, the body 4.6.6 Vib
49、ration.- When the body assembly is provided as part of a complete periscope, this test and the related test of 4.6.7 will not be required. This test shall be performed on body assemblies procured as a repair part item. Standard vibrating equipment capable of providing the amplitude and frequency specified in 3.6.5 shall be utilized for this test. Unless otherwise specified, the test equipment shall be in accordance with the “Test Facili
