1、 MIL-M-23037B 66 9 7777906 0330226 3 9. MIL-M-21039A 25 MAY 1964 MILITARY SPECIFICATION MAGNIFIER, MEASURING TUBE “E, SEVEN POWER AR-60( ) This specification is approved for use by the Naval Air Systems Command, Department of the Navy, and is available for use by all Departments and Agencie2 of the
2、Department of Defense. 1. SCOPE - 1.1 Scope. This specification covers the requirements for a seven- power precision magnifier with interchangeable reticles for interpre- ting and measuring photographic +atives, transparencies, and pr ints. 1.2 Classification. nated AR-60 ( ) . (See 6.3). The magnif
3、ier s&ll be of one (1) type., desig- .- e 2. APPLICABLE Docm 2.1 effect on the date of invitation for bids or request for proposals, form a part of this specification to the extent specified herein. Issues of documents. Ihe following documents of the issue in SPECIFICATIONS FEDERAL PPP-B-6 36 PPP-B-
4、676 - Boxes, Setup. - Boxes, Shipping, Fiberboard. MILITARY . MIL-P-116 - Preservation-Packaging , Methods of ., “&nef icial comments (recommendations, additions, deletions) and any per- tinent data which may be of use in inproving this document. should be addressed to: Naval Air Engineering Center,
5、 ESSD (Code 93), Lakehurst, NJ 08733 by using the self-addressed Standardization Document .Improve- nent Proposal (DD Form 1426) appearing at the end of this document or bv letter.“ ESC 6650 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-21039
6、B (AS) STANDARDS FEDERAL FED-STD-H28 MILITARY MIL4TD-105 MIL-STD-129 MIL-6TD-130 MIL-STR-155 - ScrewJIhread Standards for Federal Ser- vices. -Sampling Procedures and Tables for Inspec- -Marking for Shipment and Storage. - Identification Marking of U. S. Military - Joint Photographic Type Designatio
7、n System. tion by Attributes. Property. (Copies. of specifications, standards, drawings and publications re quired by contractors in connection with specific procurement func- tions should be obtained frm the procuring activity or as directed by the contracting officer.) 2.2 _Conflict with reference
8、d documents. in this specification conflict with any requirements in a referenced specif kation, the requirements of this specification shall apply. 3. REQUIREMENTS 3.1 First article. When spcified by the procuring activity (see 6.2), the contractor shall furnish sample magnifiers for first article
9、in- spection and approval (see 4.5). 3.2 Materials. Materials shall be as specified herein. Materials not spcified shall be of good commercial quality entirely suitable for the purpxe. fections that might affect serviceability or appearance of the fin- ished product. Where requirements stated Materi
10、als shall be free from all defects and hpr- 3.2.1 Metals. Metals shall be of the corrosion-resistant type or treated to resist corrosion due to atmospheric conditions likely to be encountered in storage or service use. 2 _- e Provided by IHSNot for ResaleNo reproduction or networking permitted witho
11、ut license from IHS-,-,-MIL-M-21039B (AS) 3.2.2 Screw threads. nifier shall conform to the requirements of the FED-t3TD-H28. Screw threads used in the construction of the mg- 3.3 Interchanqeabilfty. Similar units, parts, and accessories of each magnifier shall be directly and completely interchangea
12、ble with corre- sponding units, parts, and accessories of other magnifiers furnished on the same contract. 3.4 Components. parts. ponent parts: nie magnifier shall consist of the following com- Lens Lens mount Supporting tue Reticle 3.4.1 - Lens. The lens shall be a precision ground, seven-power, an
13、d three element aplanat. to provide satisfactory coverage of a flat field having a minhum diameter of 25 millimeters. 3.4.1.1 Lens resolution. mum of 56 lines per millimeter at the center of the field and a minhum of 35 lines per millimeter at the edges of the field. 3.4.2 kns mount. Te lens shall b
14、e mounted in an eyepiece. Metal sur- faces of the eyepiece shall be given a black anodic coating. nie eyepiece shall be externally threaded to properly engage the threaded interior sur- face of the supporting tube to facilitate focus adjustment. Means shall be provided for maintaining an accurate fi
15、t between the threaded portion of the eyepiece and the threaded portion of the supporting tube. 3.4.3 Supporting tube. plastic support capable of maintaining the lens in a fixed position at any selected distance from the image. nie supporting tube shall be internally threaded to properly engage the
16、threads of the eyepiece. supporting tube shall be externally threaded to properly engage the threads of the re.ticles. alignment of the lens and the reticle at all times. Spherical and chramatic abberations shall be corrected Ihe lens shall be capable of resolving a mini- nie supporting tube shall b
17、e a durable transparent nie base of the Ihe supporting tube shall mintain the proper optical 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-210398 bb W 399990b 01302Z7 7 W MIL-M-21039B (AS) 3.4.4 Reticle. nie reticle shall be mounted in a me
18、tal cell. Glass used in the reticle shall be of good optical quality with no trace of color. The glass shall be free from striae, bubbles, seeds, stones, or other visible defects. Tne surfaces of the reticle shall be ground and polished parallel to each other within a maximum wedge angle of 5 min- u
19、tes of arc. Ihe reticle pattern shall be produced by the photoetch pro- cess. nie lines produced by the photoetch process shall be filled with a cinnabar red filler- A through G shall be in accordance with Figures 1 through 7, respectively. The procuring actiyity shall specify the type and quantity
20、of reticles to be supplied with the magnifier (see 6.2). 3.4,4.1 Reticle cell. Each glass reticle shall be permanently mounted in a metal cell. engage the exterior threaded surface of the base of the supporting tube. The metal cell shall hold the reticle pattern surface parallel to and not more than
21、 0.3 millimeters frm the image being viewed. 3.4.4.1.1 Reticle cell marking. !he edge of each reticle cell shall be durably marked to indicate the type of reticle pattern and the manu- facturers name or trademark. ?he shape, dimensions, and tolerances of reticles ?he metal cell shall be internally t
22、hreaded to properly 3.5 Case. matermshall be provided. tightfitting cover. fier, 5 reticles, and an instruction sheet. shall be held in place in a manner to protect the glass surfaces from scratches I abrasionsr and other damage 3.6 Dimensions. be us sgecified herein. 3.6.1 Magnifier. 2.5 inches in
23、length by 1.75 inches in diameter. 3.6.2 Carrying case. exceed 5 inches in fength, 2 inches in width, and 2 inches in height. 3.7 Weight. and 5 reticles enclosed, shall not exceed 4 ounces. Unless othexwise specified, a carrying case made of durable ?he carrying case shall have a hinged, and lhe mag
24、nifier and reticles lhe carrying case shall be sized to hold the magni- . lhe dimensions of the magnifier and carrying case shall The maximum dimensions of the magnifier shall not exceed Tne maximum dimensions of the carrying case shall not ?he maximum weight of the carrying case, with the magnifier
25、 3.8 Finish. grade for precision optical instruments. case shall conform to the best commercial practice for high-grade draft- ing instrument cases. 3.9 Identification marking-. Tne identification marking for the magnif ler shall be placed on the exterior of the carrying case. marking shall be in ac
26、cordance with the requirements of MIL-STD-130. lhe finish of the magnifier shall conform to the highest Tne finish of the carrying Tne identification 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-21039B (AS) 3.10 Workmanship. dance with the
27、 best commrcial practice for precision optical instru- ments. Workmanship shall be of the highest grade in accor- 4 QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract, the contractor is responsible for the performance of all inspection requirem
28、ents as specified herein. specified inthe contract, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified hereinr unless disapproved by the Government. reserves the right to perform any of the inspections set forth in the specifi
29、cation where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. Except as otherwise The Government 4.2 Classification of inspections. The inspection requirements specified herein are classified as follows: 1. First article inspection (see 4.5).
30、2. CXiality conformance inspection (see 4.6). 4.3 Inspection conditions. Ihe inspection conditions shall be as speci- f ied herein. 4.3.1 Temperature and humidity. Unless otherwise cpecif id, the mag- nifier shall be inspected under room ambient conditions of 73+ I 9 degrees F and relative humidity
31、of 50+ - 10 percent. 4.4 Failure durinq inspections. Any characteristics exhibited by the mag- nifier during any inspection specified herein which would cause the mgni- fier to fail to meet any of the requirements of Section 3 of this specifi- cation, while in service, shall constitute failure of th
32、e magnifier to pass the inspection and my be the basis for rejection of the magnifier. 4.5 First article inspection. Ihe inspection shall consist of all inspections specified herein. 4.5.1 First article sample. be as specified by the procuring activity (see 6.2). sample shall be representative of th
33、e production model magnifier. The quantity of first article samples shall The first article 4.6 Quality conformance inspection. This inspection shall cokist of . the following inspections: a. Sampling inspections (see 4.6.1). Provided by IHSNot for ResaleNo reproduction or networking permitted witho
34、ut license from IHS-,-,- MIL-M-2L037B bb m 777770b 0130231 5 m MIL-M-21039B (AS) 4.6.1 Sampling inspections. ?he sampling inspection. shall be as spci- fied herein. MIL-STD-105 general inspection level II. (AQL) shall be as specified by the procuring activity (see 6.2). Sampling for these inspection
35、s shall he in accordance with ?he acceptable quality level 4.6,l.l asica examination. Examine each magnifier visually and with gauges to determine conformance tu specified requirements for materials, construction, fit and interchangeability of components, dimensions, weight, finish, marking, and wor
36、kmanship. Determine that the externally threaded surfaces of the eyepiece properly engage the internally threaded surfaces of the supprting tube and permit ocus adjustment. Determine that the externally threaded surfaces of the supporting tube properly engage the internally threaded surfaces of the
37、reticles. measure the reticle scales to determine conformance to specified dimen- sions and tolerances. . reticles shows no trace of color and is free from striae, bubbles, seeds, atones and other visible defects. Using suitable gauges determine that the glass surfaces of each spxified reticle are p
38、arallel to each-other within 5 minutes of arc. cell holds the pattern surface of the reticle parallel to and not more than 0.3 millimeters from the surface of the image being viewed. Visually ex- amine the carrying case tu determine that the case is constructed in such u manner to properly hold the
39、magnifier and 5 reticles arad to protect all glass surfaces from scratches, abrasion, and other damage. 4.6.1.2 Magnification. suppocting tube of the magnifier. ject the image of the reticle onto ground glass. the projected image. of the image on the reticle and determine conformance to the requirem
40、ents or a lens magnification factor of seven. Using suitable gauges Visually determine that the glass used in the Using suitable gauges determine that the reticle * Properly attach a reticle of known scale to the Using the lens of the magnifier, pro- Divide the size of the projected image by the siz
41、e Determine the size of 4.6.1.3 Distortion. Examine a suitable calibrated grid pattern through the lens of the magnifier. evidence of distortion within the field of view of the lens. Determine that the grid pattern exhibits no 6 Provided by IHSNot for ResaleNo reproduction or networking permitted wi
42、thout license from IHS-,-,-MIL-M-230398 66 m 7999906 0330232 7 m MIL-M-21039B (AS) 4.6.1.4 Chromatic Aberration. Using the magnifier, examine a suitable high contrast white test pattern on a black background. Determine that the test pattern is free frcm visually perceptible color fringes over the en
43、tire field of view of the magnifier. 4.6.1.5 Field of view. tric circles having knm diameters. that is completMy visible through the lens of the magnifier has a diameterof not less than 25 millimeters. Using the magnifier, view a series of concen- Determine that the largest circle 4.6.1.6 Besolution
44、. Pbsition a 1951 WAF, or equal, high contrast resolution test plate in the object plane of the magnifier at the center of the-field of view. Deter- mine that the magnifier resolves a minimum of 56 lines per millimeter. Repeat this procedure at randomly selected positions at the edge of the field of
45、 view and determine that the magnifier resolves a minhum of 35 lines per millimeter . Adjust the magnifier lens for best focus. 4.7 Rejection and retest. Bjected magnifiers shall be replaced or reworked to correct the defects, after which all necessary inspections shall be repeated. Rejected magnifi
46、ers shall not be resubmittedfor inspection without furnishing complete particulars conrning previous rejections and the measures taken to correct the defects. gation indicates that the defects may exist in magnifiers previously accepted, complete particulars concerning the defects found, including r
47、ecammendations for correction, shall be furnished to the procuring activity . When investi- 4.8 Destroyed specimen. All parts, specimens, or assemblies destroyed in making inspections required to determine canpliame with this speci- fication shall be in addition to the quantity specified in the cont
48、ract or purchase order an shall be furnished without increasing the cost of the contract or order. 4.9 Examination of packaqinq and packine, Examine the packagiq ard packing of the magnifier in accordance with the Quality Assurance Pro- - visions of the specifications referenced in Section 5. . I 5.
49、 PACKAGING 5.1 Preservation and packaqinq. Preservation and packaging shall be kvel A or Cammercial as specified (see 6.2). 5.1.1 Level A. Level A packaging shall be as specified herein. ! 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-23037B 66 797770b 0330233 7 9 MIL-M-21039B (AS) 5.1.1.1 Unit packaginq. The magnifier and reticles enclosd in the carrying cas
