1、VIL-T-L029A 9999906 1700499 702 D I NCt! -POUN MIL-T-71029A (AR) SUPERSEDING 30 October 1992 MIL-T-71029 (AR) 02 May 1991 MILITARY SPECIFICATION TELESCOPE, ELBOW: 9356181 This specification is approved for use by the U.S. Army Armament, Munitions and Chemical Command, and is available for use by all
2、 Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the general requirements and tests for the 4-power fixed focus elbow telescope which is the optical portion of Sightunit: M67. Throughout this specification this instrument is referenced as “telesco
3、pe.“ This telescope has a radioactively illuminated reticle (see 3.2.1 and 6.1). 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this docu- ment to the extent specified herein. Unl
4、ess otherwise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation (see 6.2). SPECIFICATIONS MIL I TARY MIL-0-13830 - OrLical Components for Fire Control In
5、struments; General Specification Governing the Manufacture, Assembly, and Inspection of fication Governing the Manufacture ar,d Inrpection of MIL-F-13926 - Fire Control Materiel; General Speci- l be conducted with the unaided eye utilizing the shadowig technique while viewing through the objective a
6、nd eyepiece ends of the telescope. The optical system of the telescope shall conform to the requirements of 3.3.7. 4.7.1.8 External tritium contamination. The contamination test shall be performed by wiping all surfaces of the item under test witk filter paper moistened with deionized or distille? w
7、ater. The amount of tritium contamination on the filter paper shall be deter- mined by using a liquid scintillation counting technique. The paper shall be placed in the liquid scintillation solution within one minute after wiping the scope. The liquid scintillation counting system shall have suffici
8、ent sensitivity to detect a lower limit of detection of 10 picocuries within 95 percent confidence limit. This test shall be performed by the contractor. The contractor shall furnish filter paper, solution, and bottles. The damp filter paper shall be placed in a container with the proper percentage
9、of scintillation liquid. Insert the sample into this systE.n, count a minimum of 2000 disintegrations (If 2000 disintegztions is not reached in one ho-dr, discontinue the count) and con:ert the readout 4 into microcuries (222 DPM x 10 = 1 microcurie). The measured contamination shall be within the l
10、imits specified in 3.3.8. The liquid scintillating system must be calibrated, on six-month intervals, to a standard traceable to anN.S.T. standard. 4.7.1.9 Diffusion test. Completed scopes, with all luminous vials installed, shall be submerged ir. a measured volum?. of distilled or deionized water e
11、qual to approximately 10 times the valume of the scope for 24 hours at 23O + 5OC. the water. The water shall be analyzed in accordance with the anzlytical procedures defined below: Scopes shall then be removed from a. This is the test procedure for tritium diffusion, and if the radioactive content o
12、f the water exceeds 50 nanocurler/day, it shall constitute failure of the test. b. Analysis of tritium content in th3 diffurion test shall be made with a liquid scintillation counter. The system calibration shall bc established using quenched standards. Total system plus 13 Provided by IHSNot for Re
13、saleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-71029A (AR) standards errors in the standardization shall not be in excess of 10 percent. Efficiencies of the unknown samples shall be established by the channels-ratio method, the external channels-ratio method, or the “
14、H“ number method of quench compensation. Counting time shall be established as such that at the test limits, the error (one standard deviation) shall not be greater than 15 percent. The scintillation solution shall be an acceptable commercial water soluble liquid scintillation cocktail. The counting
15、 bottles shall be a low potassium liquid scintillation borosilicate glass bottle or polyethylene liquid scintillation vial. lation vials are used, a set of quench standards traceable to the National Institute of Standards and Technology shall be made up in the polyethylene vials to determine efficie
16、ncy. standards are in glass bottles, a correction factor shall be deter- mined so that the correct results will be obtained from samples in polyethylene scintillation vials. when polyethylene scintil- If the quench 4.7.2 Performance. 4.7.2.1 Collimation test. This test shall be performed by means of
17、 a surface plate, “V“ block and a target projector collimator having a clear aperture of at least 2.0 inches. A collimating telescope of at least 3 power (3X) containing a horizontal and vertical reticle line shall also be utilized for alignment of the target projector collimator target reticle. con
18、tain a 1.0 mil diameter circle at the intersecting point of the horizontal and vertical reticle lines to determine conformance with collimation, as specified in 3.4.1. Tolerance marks shall also be incorporated on both sides of the vertical reticle line to determine conformance to parallelism of ret
19、icle image, as specified in 3.4.4. Unless otherwise specified, the target projector collimator shall be set at infinity focus. b. Target reticle alignment shall be accomplished by placing the 3 power (3X) collimating telescope in the “V“ block seated on the surface plate. Direct the line of sight of
20、 the collimating telescope toward a plumb line and plumb the vertical reticle line. Position the target projector collimator and establish coincidence of the horizontal and vertical reticle lines on the target projector collimator reticle with the respective crosslines on the collimating telescope r
21、eticle. position the telescope under test in the lvll block. Observe where the intersecting point of the telescope reticle centerlines falls with respect to the intersecting point on the target reticle. Conformance with 3.4.1 shall be considered acceptable if the intersecting point of the telescope
22、reticle falls within the 1.0 mil diameter circle on the target reticle. This test shall be repeated when the telescope under test is rotated 90 left and again 90 right of the original test position. a. The target reticle of the projector collimator shall c. Remove the collimating telescope from the
23、vlV1l block and The intersecting point of the 14 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-7L029A 9999906 L700.513 902 D MIL-T-71029A (AR) telescope reticle shall be within the 1.0 mil diameter circle on the target reticle at both positio
24、ns to insure overall compliance with 3.4.1. 4.7.2.2 Parallax. This test shall be accomplished by sighting through the telescope of the target projector collimator at the distance specified in 3.4.2. apparent movement of the reticle line in relation to the target image when the observers head is move
25、d from side to side or up and down. Parallax is checked at the optical axis (center of the reticle pattern), and shall not exceed the requirements of 3.4.2. 4.7.2.3 Resolution test. This test shall be performed in accordance with the resolution test in MIL-0-13830, and the telescope shall meet the r
26、esolution value specified in 3.4.3. be performed in conjunction with the test in 4.7.2.1. At each of the three (3) positions obtain coincidence of one extremity of the telescopes vertical reticle line with that of the vertical target line. telescopes vertical reticle line. The vertical reticle line
27、of the telescope shall be parallel with the respective reticle line on the target image within the tolerance specified in 3.4.4, as measured on the target. A peep sight placed over the objective of the telescope under test will assist the observers eye for parallax. angular value of the graduation m
28、arks is accomplished by means of a mil block chart with dimensions suitable for the target distance utilized and based on the dimensional notes on drawing 9356143. error for this test shall not exceed the amount indicated on 3.4.5. Parallax will be recognized as any 4.7.2.4 Parallelism of reticle an
29、d imaqe test. The test shall Observe for coincidence at the opposite extremity of the 4.7.2.5 Reticle accuracy test. Reticle accuracy test for the The 4.7.2.6 Eyepiece focus test. Eyepiece focus test is made with the aid of a 3-power dioptometer adjusted for the individual observers eye accommodatio
30、n. Locate the telescope with the objective facing a well illuminated white background so that the reticle pattern is clearly visible. Place the dioptometer in front of the eyepiece and remove parallax by movement of the dioptometer scale. The reading of the dioptometer scale will indicate the error,
31、 and shall meet the requirements of 3.4.6. 4.7.2.7 Illumination test. The reticle illumination test shall be performed under simulated conditions specified in 3.4.6. The luminosity test shall be performed in a dark room having a variably controlled light source. To perform this test, the observer mu
32、st be dark adapted by being in a darkened room for a minimum of 15 minutes before viewing the reticle markings. Prior to performing the test, place a white matted surface approximately 2 feet from the telescope window. Perform the test by observing the reticle pattern and determine that this pattern
33、 is clearly discernible by means of the self-illuminating source in the dark room. Gradually raise the level of illumination to where the pattern becomes indiscernible. Center an aperture stop over the objective entrance aperture of the 15 Provided by IHSNot for ResaleNo reproduction or networking p
34、ermitted without license from IHS-,-,-flIL-T-7L029A 9999906 L7005L4 49 W MIL-T-71029A (AR) telescope and observe that the reticle pattern is clearly discern- ible. The aperture of the stop shall approximate one half (1/2) the interior diameter of the retainer for the objective lens. Raise the ambien
35、t level of illumination to 10 foot candles, remove the fixed stop and observe the reticle pattern. Repeat the above test with a 50% neutral density filter placed over the viewing end of the tele- scope. The reticle illumination of the telescope, with and without the 50% neutrzl density filter, shall
36、 meet the requirements of 3.4.6. 4.8 Workmanship. The telescope shall be subjected to a visual and tactile examination for evidence of faulty workmanship. The telescope shall conform to the requirements of 3.6. 5. PACKAGING 5.1 General. Preservation, packaging, packing, and marking shall be in accor
37、dance with Packaging Data Sheet PS 9356181 and DLAM 4145.8. The level of protection shall be as specified in the procurement document. 6. NOTES (This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.) by Telescope Mount, 9356166, in Sightunit,
38、 M67, which is used in connection with direct and indirect fire of weapons. 6.1 Intended use. The Telescope, Elbow, 9356181, is supported 6.2 Acquisition requirements. Acquisition aocuments must specify the following: a. Title, num5:r and date of this specification. b. Issue of DODISS to be cited in
39、 the solicitation, and if require, the specific issue of individual documents referenced (see 2.1.1 ) . c. Requirenen$s for zxbmission of first article sample. d. Applicable stock number. e. Packaging requirements, if other than specified in f. Serialization requirements, if applicable. g. Certifica
40、te of conforqance fcr each lot or shipment of 6.3 Submission of contractor inspection equipment desiqns for Section 5. product. approval. Submit two copies of designs as required to: Commander, U.S. Army ARLEC, Attn: SMCAR-QAF-I, Picatinny Arsenal, NJ 07806-5000. This adjress will be specified on th
41、e Contract Data Requirenents List, DD Fcrm 1423 in the contract. tion under the hesding U.S. Army Armament Research, Deveic?ment, and Engineering Centti: (ARGEC), may also include drawings prepared by, 6.4 Drawinqs. Drawings listed in Section 2 of this specifica- 16 Provided by IHSNot for ResaleNo r
42、eproduction or networking permitted without license from IHS-,-,-MIL-T-7L029A = 9999906 II7005L5 785 MIL-T-71029A (AR) and identified as U.S. Army Armament Research and Development Command (ARRADCOM), Frankford Arsenal, Rock Island Arsenal or Picatinny Arsenal drawings. activities is now under cogni
43、zance of ARDEC. Technical data originally prepared by these 6.5 Subject term (key word) listinq. Fire Control System Mortar Sightunit Tritium 6.6 Dirt size equivalent. For comparison purposes, the maximum 6.7 Chanqes from previous issue. Marginal notations are not width of a reticle line is equal to 1.5 dig size. used in this revision to identify changes with respect to the previous issue due to extensiveness of the changes. Custodian : Army-AR Preparing Activity Army-AR (Project 1240-AB42 17 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
