NAVY MIL-V-85374-1979 VISORS SHATTER RESISTANT《抗震安全罩》.pdf

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1、MIL-V-8 53 74 (AS ) 13 December 1979 MILITARY SPECIFICATION VISORS, SHATTER RESISTANT This specification is approved for use by ehe Naval Air Systems Command, Department of the Navy, and is available for use by all Depart- ments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This spe

2、cification covers the requirements for polycarbonate visors for the EEK-4A/P Helmet .Visor Assemblage, 1.2 Classification. Visors shall be of the following classes, see 6.2: Class 1 Clear Visor Class 2 Neutral Visor 2. APPLICABLE DOCUMENTS 2.1 date of invitation for bids or request for proposal form

3、 a part of this specification to the extent specified herein. Issues of documents. The following documents of the issue in effect on SPECIFICATIONS FEDERAL L-P-393 -Plastic Molding Material, Polycarbonate, Injection and Extrusion PPP-B-636 -Box, Shipping Fiberboard PPP-B-676 MILITARY -Boxes, Setup M

4、IL-V-22272 -Visor, Protective, Helmet, Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commanding Officer, Naval Air Engineering Center, ESSD, Code 93 Lakehurst, New Jersey 08733 by using the se

5、lf-addressed Standard Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. e - -_l FSC 8475 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-STANDARDS FEDERAL FED-STD-406 MILITARY MIL-STD-105 MIL-STD-129 MIL

6、-STD-130 MIL-STD-810 IIRAWINGS MIL-V-8 5374 (AS). -Plastic, Methods of Testing -Sampling Procedures and Tables for Inspection by Attributes -Marking for Shipment and Storage -Identification Marking of U.S. Military Property . -Environmental Teat Methods NAVAL AIR DEVELOPMENT CENTER 9 54AS4 1 O -Viso

7、r Lens Subassembly e Medium -Visor Lens Subassembly, Large ._ 954AS411 (Copies of specifications, standards, drawings, and publications re- . quired by contractors in connection with specific procurement. functions should be obtained from the procuring activity or as directed by the con- tract ing o

8、fficer . ) 2.2 Other publications. specification to the extent specified herein. Unless otherwise indicated, the issue in effect on date of invitation for bids or request for proposal shall apply. The following documents form a part of this AMEBICAN NATIONAL STANDARDS INSTITUTE (ANSI) 258.7.1-1951 -

9、Method of Spectraphotmetric Measurement for: For Color (Application for copies should be addressed to the American National Standards Institute, 1430 Broadway, New York, NY 10018,) AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM D 412 -Tension Testing of Vulcanized Rubber (Application for cop

10、ies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-V-8537q q 7779906 0407447 T (Technical society and technical association speci

11、fications and stan- They are also dards are generally available for reference from libraries. distributed among technical groups and using Federal Agencies.) 3. REQUIREMENTS 3.1 First article. Unless otherwise specified in the contract or order, the visors furnished in accordance with this specifica

12、tion shall be a pro- duct which has been inspected and has passed the first article inspection specified herein, (see 4.3). - 3.2 Materials. The visors and guides shall be molded from a polycarbonate resin as specified in L-P-393. 3.3 Design and construction. The design and construction of the visor

13、s shall be as specified in NADC Drawing 954AS410 or 954AS411 as applicable. 3.3.1 Areas of vision. The visor area of vision shall be classified as critical and non-critical. The critical area of vision shall be as speci- fied on the applicable drawing and shall conform to the requirements and optica

14、l characteristics specified herein. The non-critical area of vision shall be all other areas of the visor not indicated as critical and shall conform to the same requirements as for the critical area insofar as the state-of-art permits. 3.3.2 Point “C“. NADC drawing 954AS410 or 954AS411. Point “C“ s

15、hall be located as specified in the applicable 3.4 Performance. 3.4.1 Visible transmittance. 3.4.1.1 Class l-Clear visor. The total visible transmittance of Class 1 visors, when calculated as specified, (see 4.6.2) shall be substantially uniform over the entire visor and shall be not less than 87 pe

16、rcent at point “C“ as defined on applicable drawings. 3.4.1.2 Class 2-Neutral visor. The total visible transmittance of Class 2 visors at point “C“, when calculated as specified, (see 4.6.2) shall be 1224 percent. The transmittance at the top of the visor shall not exceed the transmittance at the bo

17、ttom of the visor. The transmittance at the left point “C“ and right point “C“ shall not differ by more than 20 percent of the higher of the two values. 3.4.2 Neutrality. 3.4.2.1 Class 2 visor. The visible transmittance of the Class 2 visor, when calculated as specified, (see 4.6.3) shall vary with

18、wavelength be- tween 430 and 730 nanometers so that the average percentage deviation from neutrality is less than 12 percent. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.4.3 Chromaticity. 3.4.3.1 Class 2 visor. The chromaticity coordinates, x a

19、nd y, of the Class 2 visor, when calculated as specified, (see 4.6.4.1) shall plot within the ellipse in Figure 1. 3.4.4 Diffuse transmittance (all classes of visors). The diffuse trans- mittance of the visor, when determined as specified, (see 4.6.5) shall not exceed 5 percent of the total visible

20、transmittance. 3.4.5 Haze. The haze value of the visor shall not exceed 2.0 percent when tested as specified, (see 4.6.6). 3.4.6 Ultraviolet transmittance. 3.4.6.1 The average ultraviolet transmittance of the Classes 1 and 2 visors, when determined as specified, (see 4.6.7) shall be less than 5 perc

21、ent in the erythemal band (290-320 nanometers). 3.4.7 Abrasion resistance. After being subjected to the abrasion tests specified, (see 4.6.8) the increase in haze shall not exceed 6 percent and the decrease in transmittance shall not exceed 4 percent. 3.4.8 Adhesion of coating, The coating, when tes

22、ted as specified, (see 4.6.9) shall not be removed, dislodged, or affected in any way. Removal or loosening of the coating shall be cause for rejection. 3.4.9 Prismatic deviation (all classes of visors). 3.4.9.1 Vertical prismatic deviation. The vertical prismatic deviation between point “C“ for the

23、 right eye and point “C“ for the left eye, when measured as specified, (see 4.6.10.1) shall not differ by more than 0.25 diopters. deviation throughout the critical and semi-critical area of the visor. In addition, there shall be no abrupt transitions in prismatic 3.4.9.2 Horizontal prismatic deviat

24、ion. The sum of the horizontal pris- matic deviation at point “C“ for the right eye and point “C“ for the left eye, when measured as specified, (see 4.6.10.1) shall not exceed 0.75 diopters. point “C“ for the right eye and point “C“ for the left eye shall not exceed 0.18 diopters. matic deviation th

25、roughout the critical and semi-critical area of the visor. 3.4.10 The spher- ical and cylindrical power, when measured, as specified, (see 4.6.11) shall not exceed plus or minus 0,125 diopters at point “C“. 3.4.11 Critical vision area distortion (all classes of visors). The dis- tortion within visio

26、n area, when examined as specified, (see 4.6.12) shall be within the acceptable limits shown in Figure 2. The difference between the horizontal prismatic deviation at In addition, there shall be no abrupt transitions in pris- Spherical and cylindrical power (all classes of visors). Provided by IHSNo

27、t for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I_ -I_- - MIL-V-85374 81.I = 777770b 0407450 T C e - .I + L c O II Q) H .I c Lo E H 8 2 D *I - u) L C O .I c t H .I ICI e

28、 FIGURE 2. C 0 O .I c L t n 5 o rn I 6 I a Ly .II L c4 W rn 4 c l Visual examination. tical and major defects to determine conformance with this specification. Each visor selected as a sample unit from the lot shall be thoroughly checked for dimensional conformance and visually examined for minor de

29、fects to determine conformance to this specification. The classification and Every visor shall be examined visually for cri- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-11-8 5374 (AS) TABLE I, Sample size, ncccptaiic-e criteria, examimat ons

30、and tcsts. iiipcct ion Visunl examination Visibic transmi t tance Neutrality C li r oma t i c i t y u ir ruse transmit tance Abrasion (Scratcli-resistan t contings on Class 1 and 2) hdhesion o coating (Scratch-resistant toatings on Class 1 iind 2) resistance Prismatic deviation iplierical and cylind

31、rical power :ritical vision area distortion Jisiial examination for other optical defects :rack propaga- tion resistiince OC visors Type of inspection Cri tical iind minor Cri tical Major Miijor Major Cri tical Critical Cri tical Critical Cri tical Major Cri tical Pariigr Reference 3.3.1 and 3.4.17

32、3.4.1 3.4.2 3.4.3 3.4.4 3.4.7 3.4.8 3.4.9 3.4.10 3.4.11 3.4.17 3.4.12 lh Test 4.6.1 - 4.6.2 4.6.3 4.6.4 4.6.5 4.6.8 4.6.9 4.6.10 4.6.11 4.6.12 4.6.1 4.6.13 Every visor for cri ticiil defects and Inspec tioii Level TI for minor clef cc t s Inspec tion ,eve I 21 .- i/ 21 Acccptnncc cri tvrin Kc,Joct a

33、ll units wltli any cri tertii dcfects and an accrptnblc quality levrl OF 6.5 dcferts per 100 units lor minor defects Accaptnnw number zero, rcj c*c t inn niimhcr onr Acceptiince iiiimber miro, re cc t ion number ont! Acceptance number zero, rcjection number onp Acceptnncc number wro, rejection numbe

34、r onc hrceptnncc number zero,. rejection number ne Arcspt;iiicc niimbcr zero, rejecton number onc hrccptaiicc number zern, rejection number one Acceptance numhcr ziw , reJ ec t on number oncs Acceptance iiiimber zciro, rcj ec t ion number one Arceptance number zero, rejection number onc Acccptnnce n

35、umber zero, rc:jection number one I - i/ The sample size shall be based on the applicable snmple size code lottcr corresponding to the specified iiispectlon level of MIL-STD-105. The sample size for all types of Classes 1, und 2 visors shall be determined as specl- Fied in MIL-STD-105, Inspection T.

36、eve1 TI. 21 A- - I I 10 I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-V-5374 84 797790b 0407455 7 M TABLE II. Classification of defects for visual examination of the visor. Critical 1. 2. 3. 4. 5. 6. 7. Material imperfections - foreign matter

37、 embedded, striae, waviness, cloudiness, pits, bubbles or scratches. Surface - unclean, rough, mis- aligned, or containing cracks, nicks, or other flaws. Any component missing, malformed, fractured, or otherwise damaged. Any component loose or otherwise not securely retained. Incorrect assembling or

38、 improper positioning of components. Faulty workmanship or other irregularities. Dimensions - any dimensions not as specified herein and on the applicable drawing. Examine Minor 201. Marking - missing, insuf- ficient, incorrect, illegible, or not permanent Sharp edges on any part. 202. TABLE III. Li

39、st of defects for packaging. Contents or weight Exterior and interior markings Mat erial Workmanship Defect Contains visors of more than one class; gross or net weight exceeds the requirements. Missing? incorrect, incomplete, illegible; or improper size, location, sequence, or method of application;

40、 markings not the same on the interior and exterior container. Not as specified. Inadequate application of the components such as incomplete closure of the container .flaps, barrier material, bulging or distortion of the containers. 11 Provided by IHSNot for ResaleNo reproduction or networking permi

41、tted without license from IHS-,-,-4.6.2 Visible transmittance. Total visible transmittance is calculated from the spectrophotometric curve. Table IV. the ANSI Method of Spectrophotometric Measurement for Color Z58.7. When using the Hardy spectrophotometer, the sample shall be placed with the con- ve

42、x side toward the integrating sphere. may be obtained on Class 1 and 2 visors by using a Weston Foot Candle Meter No. 614, or equal, in conjunction with a Roundel Daylight Filter (Illuminant C) Type ADG-10, or equa1,land a voltage stabilizer. If the total visible transmittance is a borderline pass o

43、r a borderline fail, the spectrophoto- metric method shall be used or final determination o acceptability of product, Method for calculation is specified in The spectrophotometric curve shall be obtained as specified in Total visible transmittance readings The visor shall pass the requirements speci

44、fied in 3.4.1. TABLE IV. Computation table for obtaining visible transmittance and chromaticity coordinates, with a neutral visor used as an example. Wavelength Nanometers) 380 390 400 41 O 420 430 440 450 460 470 480 490 500 510 520 530 540 550 560 570 580 590 600 610 620 630 640 650 660 6 70 T I O

45、. 035 O. 040 O. 047 0.052 O. 058 0.063 0.069 O. 075 O. 080 0.085 o. o91 O. 096 o. 101 O. 106 o. 110 0.113 0.116 O. 116 0.114 0.112 o. 109 o. 108 O. 107 O. 106 O. 107 o. 110 0.114 o. 120 O. 125 O. 129 - XE - 4 19 85 329 1258 2997 3975 3915 3362 2272 1112 363 52 89 576 1523 2785 4282 5880 7322 841 7 8

46、984 8949 8325 7070 5309 3693 2349 1361 708 - X (T-xE) .140 .760 3.995 17.108 71.804 188.81 1 274.275 293.625 268.960 193.120 101.192 34.848 , 5.252 9.434 63.360 172.099 323.060 496.712 670.320 820.064 917.453 970,272 957.543 882.450 756.490 583.990 421.002 281.880 170.125 91.332 12 uE - 2 9 37 122 2

47、62 443 694 1058 1615 2358 340 1 4833 6462 7934 9 149 9832 9841 9147 7992 6627 531 6 4176 3153 2190 1 443 886 504 2 59 - .O94 .468 2.146 7.686 18.078 33.225 55.520 89.930 147.238 226.368 343.501 512.298 710.820 896.542 1061.284 1140.512 1121.874 1024.464 871.128 715.716 568.81 2 442.656 337.371 240.9

48、00 164.502 106.320 63.000 33.411 zE - 20 89 404 1570 5949 14628 19938 20638 19299 14972 946 1 5274 2 864 1520 71 2 388 195 86 39 20 16 10 7 2 2 2 (T* zE) .700 3.560 18.988 81.640 345.042 921.564 1375.722 1547.850 1532.920 1272.620 860.951 506.304 289.264 161.120 78.320 43.844 22.620 9.976 4.446 2.24

49、0 1.744 1.080 ,749 .212 .214 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-V-5374 4 9999906 0409q57 2 MIL-V-85374 (AS) TABLE IV. Computation table for obtaining visible transmittance and chromaticity coordinates, with a neutral. visor used as an example (Continued). W aveleng th (Nanometers) 680 690 700 II O 720 730