1、 Comments, suggestions, or questions on this document should be addressed to U.S. Army RDECOM, Tank Automotive Research, Development and Engineering Center, ATTN: RDTA-EN/STND/TRANS MS #268, 6501 E. 11 Mile Road, Warren, MI 48397-5000 or emailed to DAMI_STANDARDIZATIONconus.army.mil. Since contact i
2、nformation can change, you may want to verify the currency of this address information using the ASSIST Online database at https:/assist.daps.dla.mil/online/. AMSC N/A FSC 6650 METRIC MIL-DTL-62422D(AT) 17 August 2010 SUPERSEDING MIL-DTL-62422C(AT) 30 September 1998 DETAIL SPECIFICATION FILTER, LASE
3、R HAZARD PROTECTION This specification is approved for use by the U.S. Army Tank Automotive Research, Development and Engineering Center (TARDEC), Research, Development and Engineering Command (RDECOM), Department of the Army, and is available for use by all Departments and Agencies of the Departmen
4、t of Defense. 1. SCOPE 1.1 Scope. This specification covers laser hazard protection filters used in unity vision devices. 1.2 Classification. Filters described in this specification are hybrid filters consisting of a laser absorbing glass substrate with a 0.694 micron blocking multilayer interferenc
5、e filter coating. 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 of this specification. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. Whil
6、e every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3, 4, or 5 of this specification, whether or not they are listed. 2.2 Government documents. Provided by IHSNot for ResaleNo
7、 reproduction or networking permitted without license from IHS-,-,-MIL-DTL-62422D(AT) 2 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these
8、documents are those cited in the solicitation or contract (see 6.2). DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-G-174 - Glass, Optical MIL-PRF-13830 - Optical Components for Fire Control Instruments; General Specification Government the Manufacture, Assembly and Inspection of MIL-C-48497 - Coating, Si
9、ngle or Multilayer, Interference: Durability Requirements for DEPARTMENT OF DEFENSE STANDARDS MIL-STD-810 - Environmental Test Methods and Engineering Guidelines (Copies of these documents are available from https:/assist.daps.dla.mil/quicksearch/ or from the Standardization Document Order Desk, 700
10、 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.2.2 Other Government documents, drawings, and publications. The following other Government documents, drawings, and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these
11、documents are those cited in the solicitation or contract (see 6.2). DRAWINGS 7641866 - Surface Quality Standards for Optical Elements 12357797 - Filter 12357801 - Filter 12357857 - Filter 12370300 - Filter 12370324 - Filter (Copies of these documents are available from DAMI_STANDARDIZATIONconus.arm
12、y.mil or U.S. Army RDECOM, Tank Automotive Research, Development and Engineering Center, ATTN: RDTA-EN/STND/TRANS MS #268, 6501 E. 11 Mile Road, Warren, MI 48397-5000.) 2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherw
13、ise specified, the issues of these documents are those cited in the solicitation or contract (see 6.2). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-62422D(AT) 3 AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) ANSI/NCSL Z540-3 - Requirements
14、for the Calibration of Measuring and Test Equipment ANSI/ISO/IEC 17025 - General Requirements for the Competance of Testing and Calibration Laboratories (Copies of these documents are available from www.ansi.org or ANSI Customer Service Department, 25 W. 43rd Street, 4th Floor, New York, NY 10036.)
15、ASTM INTERNATIONAL ASTM D1003 - Plastics, Transparent, Haze and Luminous Transmittance of (DoD Adopted) ASTM E308 - System, CIE, Computing the Colors of Objects by Using the (DoD Adopted) (Copies of these documents are available from www.astm.org or ASTM International, P.O. Box C700, West Conshohock
16、en, PA 19428-2959.) 2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and r
17、egulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspection in accordance with 4.2. 3.2 Materials. Materials shall be in accordance with applicable drawings and specifications forming a
18、 part of this specification (see 4.4.2 and 4.4.3). 3.2.1 Glass. Glass used as an absorbing substrate shall be class 2, grade C, tempered glass filter, heat-absorbing type, ionically colored, in accordance with MIL-G-174 (Hoya LP-15, Isuzu ISK-167, Schott KG-3, or equivalent). Tempered glass shall wi
19、thstand 3 impacts of a 16 gram ball dropped from a height of 127 centimeters on edge supported glass (see 4.4.2). 3.3 Construction. The filter shall be manufactured in accordance with the interface dimensions and tolerances shown on Drawing 12357797, 12357801, 12357857, 12370300, or 12370324 as spec
20、ified in the contract (see 4.4.2, 4.4.3, and 6.2). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-62422D(AT) 4 3.4 Environmental weathering. Filters shall evidence no detonation or other physical deterioration when exposed to an irradiance l
21、evel of 1120 Watts per square meter (W/m2) (355 British thermal units per square foot per hour (Btu/ft2/h) and shall subsequently meet the requirements of 3.5.1 through 3.5.8 (see 4.5.2). 3.5 Optical characteristics. 3.5.1 Optical density. The optical density of the filter shall be equal to or great
22、er than the value specified in table I for all angles specified and for incident radiation in both “P” and “S” polarization states (see 4.4.3 and 4.5.3). TABLE I. Optical density (O.D.). Wavelength, (nm) 1/ O.D. with angle (0 to 80) +/-1.5 degrees Unity device w/filter A 694 3.4 3.5 B 1048-1068 3.4
23、3.5 C 1064 3.4 3.5 1/ Nanometers (nm) 3.5.1.1 Ruby coating characterization. The ruby blocking coating shall be spectrally characterized from 680 nm to 880 nm and shall have an optical density equal to or greater than 2 from 680 nm to 880 nm (see 4.5.4). 3.5.2 Photopic transmission. The photopic tra
24、nsmission of the filter shall be at least 65 percent at an angle of incidence of 01.5 degrees and at least 40 percent at angles of incidence up to 501.5 degrees (see 4.4.3 and 4.5.5). 3.5.3 Chromaticity. The transmission spectrum of the filter at 01.5 degrees shall have chromaticity coordinates (x,
25、y) that fall within the chromaticity curve as specified in ASTM E308 and the region bounded by the rectangle whose coordinates shall be: x, 0.4230.030 and y, 0.4330.030 (see 4.4.3 and 4.5.6). 3.5.4 Resolution. The resolution through the filter shall be less than one minute of arc (see 4.4.3 and 4.5.
26、7). 3.5.5 Filter coating durability. The coating shall be capable of operation under adverse environmental conditions without any evidence of flaking, peeling, cracking, or blistering (see 4.5.8). The coated surface shall be free of blemishes such as stains, smears, discolorations, streaks, and clou
27、diness. 3.5.6 Surface quality. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-62422D(AT) 5 3.5.6.1 Substrate. The filter substrate shall conform to the scratch and dig requirements of MIL-PRF-13830. The filter substrate shall not exceed a su
28、rface quality of 80-50 in accordance with table I of MIL-PRF-13830, except that the maximum bubble/inclusion diameter shall be 1 millimeter (mm) and the minimum bubble/inclusion separation shall be 20 mm (see 4.5.9). 3.5.6.2 Coating. Coating scratches and digs shall not exceed the values specified f
29、or the substrate. Coating scratches and digs shall be considered separate from the substrate scratch and dig requirements (see 4.5.9). 3.5.6.3 Cosmetic. Filters shall show no characteristics which are imperative or distractive to a clear, uniform field of view, that is, blemishes or color variations
30、 which are discernible/distinguishable when viewed from the normal parameters of the field of view (see 4.4.3). 3.5.7 Laser damage resistance. Filters shall exhibit no delamination or other physical deterioration when exposed to laser radiation (see 4.5.10). 3.5.8 Temperature stability. Filters shal
31、l meet the requirements of row A in table I when exposed to -405 degrees Fahrenheit (F) to +1405 F (see 4.5.11). 4. VERIFICATION 4.1 Classification of inspections. The inspection requirements specified herein are classified as follows: a. First article inspection (see 4.2) b. Conformance inspection
32、(CI) (see 4.3) 4.2 First article inspection. Three filters of each type shall be examined for the defects specified in table II and shall be subjected to the inspections specified in table III. Failure of any filter to pass any of the inspections shall be cause for rejection. The Government reserves
33、 the right to witness all the contractors inspections. 4.2.1 First article samples. First article samples shall be three randomly selected filters of each type to be manufactured. The filters shall be selected from a full chamber run. 4.2.2 First article inspection failure. Deficiencies found during
34、, or as a result of, the first article inspection shall be cause for rejection of the first article sample until evidence has been provided by the contractor that corrective action has been taken to eliminate the deficiency. Any deficiency found during, or as a result of, first article inspection sh
35、all be evidence that all items already produced prior to completion of the first article test are similarly deficient unless Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-62422D(AT) 6 contrary evidence satisfactory to the contracting office
36、r is furnished by the contractor. The Government shall not accept products until first article inspection is completed to the satisfaction of the Government. TABLE II. Classification of defects. Category Defect Method of inspection Critical: 001 Optical density not as specified (see 3.5.1). SIE 1/ M
37、ajor: 101 Materials not as specified (see 3.2). Visual 102 Dimensions and tolerances, cleanliness, and workmanship not as specified (see 3.3). Visual and SIE 103 Photopic transmission not as specified (see 3.5.2). Visual and SIE 104 Chromatically not as specified (see 3.5.3). Visual and SIE 105 Reso
38、lution not as specified (see 3.5.4). Visual and SIE 106 Surface quality not as specified (see 3.5.6.3). Visual and SIE 1/ SIE = Standard Inspection Equipment TABLE III. Classification of inspections. Title Requirement Inspection First article Conformance Examinations Tests Optical density, first art
39、icle 3.5.1 4.5.3.1 X Optical density 3.5.1 4.5.3.2 X X Optical density scan 3.5.1 4.5.3.3 X X Ruby coating characterization 3.5.1.1 4.5.4 X X Photopic transmission 3.5.2 4.5.5 X X Chromaticity 3.5.3 4.5.6 X X Resolution 3.5.4 4.5.7 X X Filter coating durability 3.5.5 4.5.8 X X Surface quality 3.5.6
40、4.5.9 X X Laser damage resistance 3.5.7 4.5.10 X Temperature stability 3.5.8 4.5.11 X X Environmental weathering 3.4 4.5.2 X Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-62422D(AT) 7 4.3 Conformance inspection. Conformance inspection shall
41、 consist of the examinations of 4.3.4 and the tests (100%) of 4.3.5. Noncompliance with any of the specified requirements in section 3 shall be cause for rejection. 4.3.1 Sampling inspection. Unless otherwise specified (see 6.2), the sampling plan specified herein shall be used. 4.3.2 Lot formation.
42、 An inspection lot shall consist of all filters of the same category, made from the same production batch, manufactured under essentially the same conditions and at essentially the same time, and submitted at the same time for acceptance. 4.3.3 Sample. Unless otherwise specified (see 6.2), the sampl
43、e for CI examinations and tests shall be randomly selected from the inspection lot in accordance with table IV. 4.3.4 CI examinations. The sample selected in accordance with 4.3.3 shall be examined for the defects specified in table II. TABLE IV. Sampling plan for CI. Inspection lot size Sample size
44、 Examination Test (100%) Major Minor Critical 2 to 8 * 5 * 9 to 15 13 5 * 16 to 25 13 5 * 26 to 50 13 5 * 51 to 90 13 7 * 91 to 150 13 11 * 151 to 280 20 13 * 281 to 500 29 16 * 501 to 1200 34 19 * 1201 to 3200 42 23 * 3201 to 10 000 50 29 * 10 001 to 35 000 60 35 * 35 001 to 150 000 74 40 * 150 001
45、 to 500 000 90 40 * 500 001 and over 102 40 * * Indicates entire lot shall be inspected (100% inspection). 4.3.5 CI tests (100%). Each filter shall be subjected to the CI tests specified in table III. 4.3.6 CI failure. Any item that fails to conform to any specified requirement shall be rejected; an
46、y failure (one or more) of the selected sample in either the Major/Minor categories or Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-62422D(AT) 8 test for the appropriate inspection lot size shall constitute a failure of the entire lot. The
47、 rejected item(s) may be repaired or corrected and resubmitted for inspection. If the contractor utilizes sampling inspection as an element of his inspection system, rejected inspected lots may be resubmitted for acceptance if the contractor performs 100 percent inspection on the lot for those chara
48、cteristics which were defective and resulted in rejection of the lot and removes all defective units or obtains procuring activity approval to resample the lot due to the insignificance of the defects. Resubmitted lots shall be kept separate from new lots and shall be clearly identified as resubmitt
49、ed lots. 4.4 Examinations. 4.4.1 Visual and dimensional examination. Filters shall be visually and dimensionally examined for completeness of manufacture, freedom from defects other than optical quality defects, proper item identification, conformance to applicable drawings and specifications, and workmanship. 4.4.2 Materials and construction. Conformance to 3.2, 3.2.1, and
