1、C-G-O3 MIL-S-25948J SUPERSEDING MIL-S-25948H 23 March 1978 .- i7 January 1984 MILITARY SPECIFICATION SUNGLASSES, HGU-4/P (WITH CASE) This specification is approved for use by all Departments and Agencies of the Department of Defense, 1. SCOPE 1.1 Scope. This document covers the requirements for sung
2、lasses, designated as HGU-4/P (with case). 9: 2. APPLICABLE DOCUMENTS 2.1 Government documents. Unless otherwise specified, the following documents of the issue in effect on date of invitation for bids or request for proposal, form a part of this document to the extent specified herein: SPEC I FIG A
3、T IONS FEDERAL L-P-375 - Plastic Film, Flexible, Vinyl Chloride PPP-B-566 - Boxes, Folding, Paperboard PPP-B-636 - Boxes, Shipping, Fiberboard PPP-B-665 - Boxes: Paperboard, Metal Edged and Components PPP-B-676 - Boxes, Setup PPP-T-45 - Tape, Gummed, Paper, Reinforced and Plain, for Sealing and Secu
4、ring Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: MA 01760 by using the self-addressed Standardization Document Improve- ment Proposal (DD Form 1426) appearing at the end of this document or
5、by letter. US Army Natick Research and Development Center, Natick, FSC 8465 L 1 THIS DOCUMENT CONTAINS 37 PAGES. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-25748J 84 W 777770b 0385437 b m MIL-S-25948 J . MILITARY DOD-D-1000 - Drawings, Eng
6、ineering and Associated Lists STANDARDS FEDERAL FED-STD-151 - Metals; Test Methods FED-STD-595 - Colors MIL I TARY MIL-STD-105 - Sampling Procedures and Tables for Inspection by Attributes MIL-STD-129 - Marking for Shipment and Storage MIL-STD-130 - Identification Marking of U, S. Military Property
7、MIL-STD-147 - Palletized Unit Loads DRAWINGS US ARMY NATICK RESEARCH AND DEVELOPMENT CENTER 8-2-66 - Sunglasses, HGU-4/P (With Case); Assembly and Details 8-2-67 - Sunglasses, HGU-4/P (With Case); Frame Assembly and 8-2-68 - Sunglasses, HGU-4/P (With Case); Temple Assembly and De tai 1s Details (Cop
8、ies of documents required by manufacturers in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting officer,) OTHER GOVERNMENT DOCUMENTS Laws and Regulations US POSTAL SERVICE MANUAL (Copies of the manual may be obtained fro
9、m the Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402.) UNITED STATES DEPARTMENT OF COMMERCE National Bureau of Standards NBS Circular 533 or NBS Special Publication 374 (Cat. No. C13.10374) r -. - ” 9 4 (Application for copies should be addressed to the Superinten
10、dent of Documents, U.S. Government Printing Office, Washington, DC 20402.) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-25748J 84 m 7777906 0385438 8 MIL-S-259.48 J 2.2 Other publications. Unless otherwise specified, the following document
11、s of the issue in effect on date of invitation for bids or request for proposal, form a part of this document to the extent specified herein. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) B 504 - Measurement of Thickness of Metallic B 117 - Salt Spray (Fog) Testing D.412 - Tension Testing of Rub
12、ber D 523 - Standard Test Method of Specular Gloss D 1415 - International Hardness of Vulcanized Natural and Synthetic Rubbers D 3951 - Standard Practice for Commercial Packaging Coatings of Coulometric Method (Application for copies should be addressed to the American Society for Testing and Materi
13、als, 1916 Race Street, Philadelphia, PA 19103.) (Technical society and technical association documents are generally available for reference from libraries. technical groups and using Federal agencies.) They are also distributed among 2.3 Order of precedence. In the event of a conflict between the t
14、ext of this document and the reference cited herein, the text of this document shall take precedence. 3. REQUIREMENTS 3.1 First article. When specified, a sample shall be subjected to first article inspection (see 4.3, 6.2 and 6.3)- 3.2 Materials. fr 3.2.1 Front and temples . All metal parts of the
15、front and temples, except the pad parts and temple screws, shall be made of nickel silver base metal containing not less than 14 percent nickel. a non-brightening nickel plate of not less than 100 micro inches (1 x 10 -4) followed by a flash chrome plate of a minimum of three micro inches (3 x 10 -6
16、) on all significant surfaces (see 4.4.2). dull matte finish with a maximum gloss reading of not more than 50 percent when tested as specified in 4.4.2.2. The base metal shall be plated with The chrome plated parts shall have a 3.2.2 Nose pads and temple tips. The nose pads and the temple tips shall
17、 be made of a clear, colorless cellulose acetate butyrate. 3.2.3 Pad insert. The pad insert shall be pure nickel, rhodium plated. 3.2.4 Pad washer. The pad washer shall be monel metal. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-25748J 84
18、 7777706 0385g37 T MIL-S-25948J 3.2.5 Temple screws. The temple screws shall be not less than 12 percent leaded nickel silver. 3.2.6 Glass. Glass used for the lenses shall be high quality, ophthalmic crown glass of neutral density. 3.2.7 Case covering. The carrying.case shall be flexible vinyl chlor
19、ide film conforming to the requirements for the 0.020 thickness of type I, class 2 of L-P-375 with the following exceptions: Thickness 0.035 + 0.0035 inch Ultimate elongation; transverse 200 percent (minimum) direct ion Stiffness, Clark at 75OF 20 + 3 centimeters 3.2.8 Case insert. The case insert s
20、hall be made from unfilled polypropy- lene resin conforming to the requirements of table I when tested as specified in 4.4.1.2. TABLE I, Requirements for polypropylene i/ Requirement Characteristic Minimum Maximum Dens i ty, kg/m3 900 910 - Tensile strength, psi 4000 - i/ Reclaimed materials should
21、be used to the maximum extent possible. 3.3 Design and construction. 3.3.1 Front. The front shall conform to Drawing 8-2-67 and shall be so cohstructed that the lenses (see 3.3.6) fit into the frame in a snug and workmanlike manner. 3.3.2 Nose pad. The nose pad shall be of the rocking-pad type and s
22、hall be adjustable to fit a wide range of nose sizes. to Drawings 8-2-67 and 8-2-68. The nose pad and arm shall conform 3.3.3 End pieces. The end pieces shall be constructed so as to permit independent removal of either the lens or temple for replacement and. shall conform to Drawing 8-2-67. . * . 4
23、 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-2574J 84 W 77777Ob 0385qLIO b W MIL-S-25948J 3.3.4 Temples. The temples shall conform to Drawings 8-2-67 and 8-2-68. 3.3.5 Screws, Temple screws shall conform to Drawings 8-2-67 and 8-2-68. 3.3.6
24、 Lenses. The thickness of the lenses shall be 2.0 to 2.5 millimeters, The lenses shall be made to conform to the right and left lens templates as shown on Drawing 8-2-68, Determination of conformance shall be on the basis that the lenses shall fit the frames with no evidence of spaces existing betwe
25、en the frames and the lenses when tested as specified in 4.4.4. The finished lenses shall be ground and polished to the curvature specified in 3.5.6. The lenses shall be heat treated or chemically tempered and capable of withstanding the impact resistance test without fracture when tested as specifi
26、ed in 4.4.1.1. 3.3.7 Carrying case. A carrying case conforming to 3.2.7, 3.2.8 and Drawing 8-2-66 shall be furnished with each pair of sunglasses. The case and the button shall approximate color number 35044 of FED-STD-595. The pencil stud, button, and socket respectively shall be United Carr Fasten
27、er Corporation numbers SS-21330, SS-21154, and SS-21201 or equal and shall be made of nickel plated steel. The outer surface of the case covering shall have a simulated natural grain leather finish, The inside surface of the case covering shall have a smooth finish. 3.3.7.1 Crush resistance of carry
28、ing case. The carrying case shall be capable of withstanding the test specified in 4.4.4 without damage to the sun glasses within the case. 3.4 Performance criteria of the frames (fronts and temples). The frames shall meet the requirements specified in 3.4.1 thru 3.4.4, fi 3.4.1 Corrosion resistance
29、. There shall be no evidence of corrosion on any of the significant surfaces when tested for corrosion resistance as specified in 4.4.2.2, f: 3.4.2 Adhesion, Adhesion of the chrome plating and of any underplating shall be such that the coating and undercoating shall not separate from each other or f
30、rom the base metal when tested as specified in 4.4.2.2. 3.4.3 Heat resistance. There shall be no visible signs of blistering, discooration, or visible white or crystaline film when tested as specified in 4.4.2.2. 3.4.4 Ductility. There shall be no visible cracks passing completely across part when t
31、ested as specified in 4.4.2.2. I 3.5 Optical performance of the finished hardened lenses. 5 , Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-25948J 35.1 Matching. Within the visual center of each lens, the right and left lenses of each pair of
32、 sunglasses shall be matched in sign and prismatic power to within 1/8 prism diopter in the vertical direction. each lens, the two lenses shall be matched in total visible transmiscion to within 20 percent of the transmission of the higher of the pair, when tested as specified in 4.4.2.1, Within the
33、 visual center of 3.5.2 Prismatic power and vertex power, The prismatic power of the lens shall not exceed 1/8 prism diopter and the vertex power of the lens shall not exceed plus or minus 1/8 diopter in any meridian when tested as specified in 4.4.2.1. 3.5.3 Definition. The lenses shall show clear
34、definition when tested as speci- fied in 4.4.4. 3.5.4 Glass defects. The lenses shall be free from surface waves, striae, or other irregularities affecting optical qualities which would cause sudden jumps or blurring when tested as specified in 4.4.4. 3.5.5 Surface quality, The lens surfaces shall b
35、e of a quality such that they appear black against a black background with side illumination when tested as specified in 4.4.4. 3.5.6 Curvature. The dioptric value of the contraocular surface of the lenses shall be + 6 (plus or minus 1/41 diopters when the dioptric value is calculated on the basis o
36、f an index of refraction of 1.530 when tested as specified in 4.4.1.1. 3.5.7 Spectral transmittance. 3.5.7.1 Daylight transmittance. When tested as specified in 4.4.1.1, in thick- ness specified in 3.3.6, the daylight transmittance of the lenses of the sunglasses shall be within the limits given in
37、table II when computed as shown in table III or by any other method yielding the same result. TABLE II. -Limiting values of transmittance and chromaticity Percent transmittance Near infrared Er y thema 1 Daylight Neutral lenses: Maximum 15 (but always less than daylight) 0.2 18 M i n imum O O 12 3.5
38、.7.2 Chromaticity Coordinates. When tested as specified in 4.4.1.1, the chromaticity coordinates, x and y, of the lenses shall be within the limits of Munsell Value 5/ chroma 2 as indicated in Drawing 8-2-68 when computed as shown in table III, or by any other method yielding the same result. 6 Prov
39、ided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-S-2S-48J A4 977706 0385442 T MIL-S-25948HJ TABLE III. Computation table of coordinates or “111wnin.wt Cl Wave length millimicrons XP yP ZP T xpT yPT zPT 380 390 400 410 420 430 440 450 460 470 48 O 490
40、 500 510 520 530 540 550 560 570 580 590 600 6 10 620 630 640 650 660 670 680 690 700 710 720 730 4 19 85 3 29 1 , 238 2 , 997 3 , 975 3,915 3 , 362 2 , 272 1,112 363 52 89 5 76 1,523 2,785 4 282 5 I 880 7,322 8,417 8 , 984 8 * 949 8,325 7 , 070 5 , 309 3 , 693 2,349 1 , 361 708 369 171 82 39 19 8 2
41、 9 37 122 262 443 694 1,058 1,618 2 , 358 3,401 4 , 833 6 , 462 7,934 9,149 9 , 832 9 , 841 3,147 7,992 6 , 627 5 , 316 4,176 3,153 2,190 1 , 443 886 504 259 134 62 29 14 6 3 20 89 404 1,570 5,949 14,628 19 , 938 20 , 638 19 , 299 14 , 972 9,461 5 , 274 2,864 1,520 712 388 195 86 39 20 16 10 7 2 2 O
42、. 104 0.240 0.301 0.275 O. 174 O. 114 O. 118 O. 127 O. 137 O. 142 O. 144 O. 145 Oil47 O. 149 O. 151 O. 153 O. 154 O. 155 O. 157 O. 158 O. 159 O. 160 O. 160 O. 160 O. 161 O 5 26 90 215 342 469 497 46 1 323 160 53 8 13 87 233 428 663 923 1,157 1 , 338 1 , 437 1 432 1 , 332 1,138 0.161 855 353 0.160 59
43、1 233 0.159 373 141 0.159 216 80 0.158 112 41 0.157 58 21 0.156 27 10 0.153 13 4 o, 151 6 2 O. 149 3 1 o 0 1 a 6 14 31 56 95 150 233 342 500 720 9 76 1,214 1 , 409 1,524 1,545 1 , 445 1 , 271 1 , 060 855 668 5 O9 O o O 0 o O o O o o 2 21 122 432 1 , 035 1 , 668 2 , 353 2,621 2,644 2,126 1,362 765 42
44、 1 226 108 59 30 13 6 3 3 2 1 O O O. 148 1 O O Total 15,085 15,512 16,023 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-25948J 84 m 9979906 03854115 L m MIL-S-25948J X-xPT; Y=yPT; Z=zPT Daylight transmittance, Tc = Y/1,000 = 15.5 percent Ch
45、romaticity coordinates:. x = X/(X + Y + Z) = 15,085/46,620 = 0.324 y = Y/(X + Y + Z) = 15,512/46,620 = 0.333 Daylight transmittance Tc and chromaticity coordinates x and y for standard illuminant C; The symbol “T“ represents spectral transmittance, the ratio of transmitted to homogeneous radiant flu
46、x. Tables III and IV are worksheets for determining the coordinates and the daylight duplication index of a typical neutral glass. 3.5.7.3 Near-infrared transmittance. When tested as specified in 4.4.1.1, the near-infrared transmittance of the lenses shall be as specified in table II when computed a
47、s the average spectral transmittance at 50 millimicron steps in the spectral region of 800 to 1,200 millimicrons. 3-.5.7.4 Erythemal ultraviolet transmittance. When tested as specified in 4.4.1.1, the erythemal ultraviolet transmittance of the lenses shall be as specified in table II when computed a
48、s the average spectral transmittance at wave lengths of 290, 300, and 320 millimicrons. 3.5.7.5 Deviation in spectral transmittance. The spectral transmittance of the lenses may vary with wave length between 430 and 730 millimicrons in order that the average percentage deviation within nine spectral
49、 bands from daylight transmittance is less than 12 when computed as shown in table IV and when tested as specified in 4.4.1.1. 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-a a a RIL-S-2594J 84 8a1 997Ob 0385444 3 - MIL-S-25948J TABLE IV. Deviations in spectral transmittance Ave rag e Wave transmit- Percent Wave length Baad length tance deviation millimicr
