1、MIIPF-12717 (0) Army 51-78-93 30 December 1947 h!XUTARY SPECIFICATION Thiu specification cansiets of this cover sheet end Specification 51-78-93, dated 30 December 1947, attached hereto, Withosit modif iationa When a request Por this specification ia received by EI eu.qlying activity it will be nece
2、ssary to attach this cover eheet to the pertfnent specification before ieaua. Copies of epecifications required by cmtractore in connection with specific procurement fimdians should bs obtaia6d from the procurilrg agency or es directed by the aontrsothg off ica5r0 Custodiam Arw - Ordnance Corps Prov
3、ided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- - MIL-F-127L7 12 7977706 029Y283 T Ei I No. 51-78-93 30 DECEMBER 1947 PILTEIIS, RAT, GLASS, FIIVISHED, AND BLANKS AND PLATES .t. .wi*Lrc-uzLE SlBCJIZIC.4TIOBS of invitation for bids, foriii a part of this
4、spccification: A-1. The following spccifications, of the issue in effect on date U. S. .-i rittu SpCSifiUIt.Wl8 : KO. 51-7. Iiistrunients, Fire Control: General Specification Governing thc Manufacture and Inspection of. No. 61-:0-2. Optical Components for Fire Control Inntru- iiiciits ; General Spec
5、ification Governing the nianufacture, Assembly and Inspection of. -4-2. Applicable daiiigs fni*iiiahed by the contracting officer in connection with the contract, forin a part of this specification. U. TYPES B-l. This specification covers finished ray filters and the colotcd glass blanks and plates
6、therefor. B-la. Colocd glass.-Finished ray filters, bixbh nd plates shall be niade of colorcd glass of optical quality :., the following types, as specified in. the contract and/or drawings. .Type I, Amber. Type II, Blue. Type III, Red. Tvne IV. Neutral. - B-2. The glass shall be furnished as finish
7、ed ray filters or un- finished ray filters in the forni of flat plates or formed blanks, as specified by th3 contract and/or drawings. C. JI.+TiSRl.L ISD VOiIi3I4SSHIP C-l. Alaierial and workinanship shall be in nccordaiice with the drasings, and applicable specifications. D. Cl2SEI:bL l:l3QZIIZBUES
8、TS Il-1. Unless otherwise specified herein, all applicable require- ments ar.d associated tests os specified in U. S. Army Speci.fication No. 51-70-2, Optical Components for Fire Control instruments; General Specification Governing the Manufacture, Assembly and Inspection of, shall apply. D-2. Plate
9、s. E-2tr. Dii,tiilsioiis.-Unless otherwise specified, .plates shall be sqLire G; rectangular, with sides not less than 2 inches long. in rectangular plates the length of the long side shall not be greater than three times the leiigtn of the short side. D-26. Liititiizg skes of defccfs.-The total pro
10、jected area of dl bubbles and see4 on a polished surface, when examined visually shall not exceed 0.1 percenl o the auiface ser 10 centii?iet.ers (3.94 inches of light path, and the total nuinber of bubbles and seeds o Provided by IHSNot for ResaleNo reproduction or networking permitted without lice
11、nse from IHS-,-,-2 aha11 not exceed 1 per cubic centimeter j0.061 cubic inch). In no case shall the mean diameter of any individual bubble exceed 0.021 inch. (0.63 millimeter). D-2c. Striae shall be light and scattered when viewed in the direction of maximum visibility. The striae shall be just abov
12、e tno limit of visibility. D-2d. Color characteristics of a specinien or specimens within a thickness range of 1.5 to 3.0mni, representative of a lot Gf piatcs escept when authorized in connection wjth Covri-nment prociirenient iinr be uscd for .any other purFse except when spccifical!y authorized b
13、y the Chief or Ordnance. Soie.-Copies of this pecificaticn riiny be obtnlned from the Office. Cli1t.f of Orunance, Department of the Briny. Vashington 25, D. C. No. 61-75-93 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-12717 12 77777Ob 02742
14、b 5 NO. 51-78-93 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-6 NO. 51-78-93 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-6 _. _ ._ _- - .- WAVELENGTH IN-MILUMICRONS CNC. 51-78-93 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- NIL-F-12717 12 9797706 0294289 O m C. I WAVELENGTH IN MILLIMICRONS NO. 51-78-93 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
