1、MIL-T-13333B (MU) .r 28 May 1.965 SUPERSEDING MIL-T-l3333A(Ord) 1 September 1959 MILITARY SPECIFICATION TELESCOPE, M49 1. SCOPE d 1.1 This specification covers one type of 20-power telescope for observing effectiveness of artillery or small arms fire. 2. APPLICABLE DOCUMENTS 2.1 The following docume
2、nts, of the issue in effect on date of in- vitation for bids or request for proposals, form a part of this specifica- tion to the extent specified herein. SPEC IF ICATIONS Military MIL- 0-1 38 30 MIL-F-13 926 MIL-P-14232 MIL-1-45607 STANDARDS Military Optical Components for Fire Control In- strument
3、s; General Specification Governing the Manufacture, Assembly, and Inspection of Fire Control Materiel: General Speci- fication Governing the Manufacture and Inspection of Parts, Equipment and Tools for Ord- nance Materiel, Packaging of Inspection Equipment, Supply and Main- tenance of MIL-STD-105 MI
4、L-STD-109 MIL-STD-129 Sampling Procedures and Tables for In- Quality Assurance Tem and Definitions Marking for Shipment and Storage spection by Attributes DRAWINGS - U. S. AI -2 : $ F75 78445 Telescope, M49 IEL 7578445 List of Inspection Documents for Ph- I Licensed by Information Handling ServicesM
5、IL-T-13333B bb 777770b 0128b31 O MIL-T-13333B (MU) (Copies of specifications, standards, and drawings required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) 3. REQUIREE-IENTS 3.1 Fabrication.-
6、 The telescope shall be manufactured in accordance with Drawing F7578445 and drawings pertaining thereto. 3.2 General specification.- Th$ Contractor shall be responsible for compliance with the following requirements of MIL-F-13926: (a) Order of precedence (b) Dimensions and tolerances (c) Inorganic
7、 protective surface finishes (d) Part identification and marking (e) Worlananship 3.3 Environmental service conditions. 3.3.1 Storage temperatures.- The telescope shall show no evidence of physical failure such as glass breakage, bonding failure, or casting failure due to storage at temperatures fro
8、m -eoo to 3160 Fahrenheit (F). 3.3.2 Standard ambient temperature,- The telescope shall meet the requirements of 3.4 through 3.5.3 at a standard ambient temperature of 75O 3.3.3 Vibration.- The telescape shall be vibrated at a constant frequency of 30 3- 5 cycles per second with an amplitude of 1/1G
9、 inch (l/C inch total excursion). evidence of damage or physical failure and the telescope shall meet the requirements of 3.4 to 3.5.3 inclusive. Subsequent to vibration there shall be no 3.4 Cleanliness.- Subsequent to vibration the telescope shall meet the cleanliness requirements of MIL-C-13830,
10、than 2 particles of dirt visible when viewed through the eyepiece, The area of each particle shall not be in excess of the area equivalent: to a eize 50 dig. There shall be no more 3 . 5 Accuracy. 5.5.1 Resolution.- The resolving power on the geometric axis shall be 35 seconds of arc car less. 3.5.2
11、 Image focus.- Rotation of the focus adjustment shall bring a target into sharp focus at any distance between 50 feet and infinity. 3.5.3 bane tilt.- The image of a plumb line shall be vertical I within 45 minutes of arc. Licensed by Information Handling Services- MIL-T-23333B 66 m 7777706 0228632 2
12、 m EIL-T-13333B (MU) 4 QUALITY ASSURANCE PROVISIONS 4.1 aesponsikilitv for inspection.- Unless otherwise specified in the contract or purchase order, the supplier is responsible for the per- fowce of all inspection requirements as specified herein. Except as btherwise specified, the supplier may uti
13、lize his own facilities or any oonidercial laboratory acceptable to the Government. The Government re- serves the right to perform any of the inspections set Eorth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. I 4
14、.1.1 General provisions.- The component inspection requirements of MIL-F-13926 form a part of the Quality Assurance Provisions of this 8peci.fication. MIL-STD-109. Definitions of inspection terms shall be as listed in 4.2 Inspection provisions. 4.2.1 Submission of Product.- Unless otherwise specifie
15、d herein, or by the contracting officer, inspection lot size, lot formatin and pre- .emtation of lots shall be in accordance with “Submission of Product“ as -6pecifiad in MIL-STD-105. 4.2.2 Examination and tests.- Components and subassemblies shall be Upected in accordance with the inspection provia
16、ions contained in MIL-F-13926 and the Supplementary Quality Assurance Provisions (SQAP) lirted in the List of Inspection Documents, IEL 7578445. Examinations and terte related to Section 3 herein shall be performed on a defect (individual characteristic) basis in accordance with the “Classification
17、of Defectcl“ specified in Table I below and the inspection level and rampling plans specified in MIL-STDI105. Packaging, packing and marking shall be in accordance with MIL-P-14232 .ad Section 5 herein. rtitute the minimum inspection to be performed by the supplier prior to Goveniment acceptance or
18、rejection by lot. The Government reserves the right to inspect for any applicable requirement, and to reject individual non-conforming items. Examination8 and tests for . . The tabulated classification of defects shall con- TABLE I - CLASSIFICATION OF DEFECTS CRITICAL: NONE REQUIREMENTS TEST PROCEDU
19、RES MAJOR: AQL 0.65 Percent Defective 101. Vibration 3.3.3 4.5.2.1 102. Cleanliness 3.4 4.5.2.2 .I 103. Resolution 3.5.1 4.5.2.4 104. image focus 105. image tilt 3.5.2 3.5.3 MINOR: None 4.5.2.5 - 4.5.2.6 . 3. . . - . -I .*d y : Licensed by Information Handling ServicesMIL-T-13333B bb W 7779706 O12b3
20、3 4 W MIL-T-13333B (MU) 4.2.3. Acceptance and reiection.0 Rejected lots shall be screened for all defective characteristics. Removal or correction of defective units and resubmittance of rejected lots shall be in accordance with “Acceptance and Rejection“ as specified in MIL-STD-105. 4.3 Special sam
21、pling. 4.3.1 General.- Government representative as a sample from each 100 produced, shall meet the requirements and tests in Table II. One telescope shall be selected at random by a The eample TABLE II CHARACTERISTICS REQUIREMENTS TEST PROCEDURES 301. Fabrication 302. General specification 3.1 App
22、1 icab le drawings * visual 3.2 MIL-F-13926 - visual 4.3.2 Environmental.- Three units shall be selected at random by a Government representat ive as samples. from each 50 produced or from each months production, whichever occurs first. met the requirements and tests in Table I and shall then meet t
23、he require- ment and test in Table III. The samples shall have TABLE III CHARACTERISTICS REQUIREMENT TEST PROCEDURE 303. Storage temperatures 3.3.1 4.5.1.1 4.3.3 Failure of sample.- Should any one item of a special sampl- ing fail to meet the specified test requirements, acceptance of tha re- presen
24、ted inspection lot will be suspended by the Government until necessary corrections have been made by the contractor and the resubmitted samples have been approved (see 4.2.3). 4.4 Inspection equipment.- Except as otherwise provided for by the contract, the contractor shall supply equipment in accord
25、ance with the applicable requirements of MIL-1-45607. right to use the test equipment for ita own independent inspections to the extent that such use will not unduly interfere w%th the contractors de- livery schedule. The Government reserves the 4.4.1 Government furnished Pnspe.ction equipment,- Whe
26、re the con- tract provides for Government furnished test equipment, care and main- tenance of test equipment shall be in accordance with the applicable re- quirements specified in MIL-1-45603, 4.4.2 Contractor furnished inspection equipment. 4.4.2.1 Government design.- All inspection equipment requi
27、red by drawings forming a part of the contract and not provided by the Govern- ment shall be supplied by the contractor in accordance with the require- ments of 4.4 and the List of Inspection Documents, IEL 7578445. Licensed by Information Handling ServicesMIL-T-13333B (MU) - 4.4.2.2 Contractor desi
28、en.- The contractor shall provide inspec- tion equipment compatible with the “Test Methods and Procedures“ specified in 4.5 and with the “Component Inspection“ and “Test facilities“ require- mente of MIL-F-13926. Since tolerance of test equipment is normally con- ridered.to be within 10% of the prod
29、uct tolerance for which it is intended, thie inherent error in the test equipment design must be considered as part of the prescribed product tolerance limit. Thus, concept, construc- tion, materials, dimensions and tolerances used in the design.of test equipment shall be so selected and controlled
30、as to insure that the test equipment will reliably indicate acceptability of a product which does not exceed 90% of the prescribed tolerance limit, and permit positive rejec- tion when non-conforming. Construction shall be such as to facilitate routine calibration of test equipment. 4.4.3 Utilizatio
31、n of standard test equipment.- The test equipment ured to perform the optical test shall consist of a standard shop type collimator projector having provisions for Betting target distances be- tween fifty feet and infinity. iupporting medium to position the telescope under test and a dioptometer beh
32、ind the eyepiece of the telescope under test. be provided for the alignment of the collimator projectors optical axis 4nd the optical axis of the dioptometer to the proposed optical axis of the telescope when positioned in the holding medium. The collimator projectors reticle shall consist of a hori
33、zontal and vertical reticle line. The intersecting point of these lines shall fall on the optical axis of the collimator. the teleecope under test (see 3.5.1) shall be constructed about this in- terrecting point as shown in Figure 1 of MIL-0-13830. Angular tolerance linea shall be located each side
34、of the vertical line above and below the horizontal reticle line to represent the image tilt limit (see 3.5.3). The location and spacing of all reticle lines, test bars, target distances, ahallbe positioned within the tolerance specified in 4.4.2.2. This equipment shall also provide a Provisions sha
35、ll also Resolution test chart representing the resolving power of 4.4.3.1 ContrDl of environmental test equipment.- in conjunction with 4.4.2.2 the following test equipment shall be utilized in the performance of the applicable tests specified in 4.5: Item Number Equipment Test Requirements Heat Cha
36、mber Test facilities of MIL-F-13926 Cold Chamber Test facilities of MIL-F-13926 Vibration fixture Teat facilities of MIL-F-13926 4.5 Test methods and procedures. 4.5.1 Environmental 4.5.1.1 Storage temperature.- Testing equipment utilized in this teat shall be in accordance with the ttTest Faciitiee
37、tt requirements of MIL-F-13926 and the conditione of 3.3.1 The telescope ahall be exposed l32) c “ - 5. Licensed by Information Handling ServicesMIL-T-L3333B 66 W 7777706 OLZBb35 MIL-T-13333B (MU) to each temperature extreme until thermal stabilization is reached. After each temperature exposure, th
38、e telescope shall be stabilized in an ambient temperature between 600 and 90F and subjected to an audible, tactile and visual examination. of 3.3.1. jecting the telescope to thermal shock. The telescope shall conform to the requirements Caution should be exercised during this test to avoid sub- rs 4
39、.5.2 Performance. 4.5.2.1 Vibration.- The telescope shall be mounted in its normal operating position to the test equipment by means of an adapter so that the entire unit is immobilized. The telescope ahall be vibrated in a vertical plane with the specified motion and frequency applied for 5 minutes
40、 5 15 seconds. Subsequent to vibration the telescope shall be visually examined for missing or damaged parts, should also be conducted to determine looseness or improper function. audible examination shall be made by positioning the telescope close to the ear and vigorously shaking it with both hand
41、s while listening for loose internal optical and mechanical parts. Any one of the possible de- fects defined above shall be cause to consider a telescope defective. Telescopes which have passed the above examinations shall be subjected to the tests as outlined below and shall conform to the requirem
42、ents speci- f ied therein. A tactile examipation An 4.5.2.2 Cleanliness.- The optical surfaces shall be inspected for The telescope shall conform cleanliness in accordance with MIL-0-13830. to the cleanliness requirements of 3.4. 4.5.2.3 Test equipment Set-up.- The optical axis of the colli- mator p
43、rojector and of the dioptometer shall be aligned to the holding medium used to support the telescope under test, by means of auto-colli- mation. dioptometer shall be positioned parallel to a plumb line. meter shall be set to proper focus by directing the line of sight toward a white background and a
44、djusting the eye asaembly to produce a sharp image of the reticle. scale to zero. Parallax is defined as movqnent between the selected target point and the intersecting point of the horizontal and vertical reticle line when the observers head is moved side to side or up and down. 4.5.2.4 Resolution.
45、- This test is performed with the test equipment The vertical reticle lines of the projector collimator and of the The diopto- Parallax hall be removed by Setting the objective aligned as outlined in 4.5.2.3. target distance and sight through the telavcope to obtain a sharp image of the vertical and
46、 horizontal reticle lineg of the collimator. This image is obtained by adjusting the telescopes eyepiece. justment the eyepiece assembly shall not contact the stop as specified in 3.5.2. serve the test bar pattern (see 4.4.3). They shall be resolved in the four quadrants within the limits outlined in 3.5.1 as measured by means of Set the collimator projector to minimum During this ad- Position the dioptometer behind the telescopes eyepiece and ob- Licensed by Information Handling ServicesLicensed by Information Handling Services
