1、INCH-POUND MIL-PRF-49147D (CR) 4 March 1999 SUPERSEDING MIL-L-49147C (CR) 27 May 1992 PERFORMANCE SPECIFICATION LENS ASSEMBLY, EYEPIECE VIEWER, DRIVERS NIGHT VISION, AN/WS-2 (V) This specification is approved for use by US Army Communications- Electronics Command, Department of the Army, and is avai
2、lable for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the Lens Assembly Eyepiece, referred to herein as eyepiece, which is part of Viewer, Drivers Night Vision AN/WS-2 (V) . 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed
3、in this section are specified in sections 3 and 4 of this specification. This section does not include documents in other sections of this specification or recommended for additional information or as examples. While every effort has been made to insure the completeness of this list, document users
4、are cautioned that they must meet all specified requirements in sections 3 and 4 of this specification, whether or not they are listed. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving the document should be addressed to: HQ, USA Com
5、munications-Electronics Command, ATTN: AMSEL- LC-LEO-E-EP, Fort Monmouth, NJ 07703-5023 by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of thi document of by letter. AMSC N/A FSC 5855 DISTRIBUTION STATEMENT A: Approved for public release; distribution i
6、s unlimited. Licensed by Information Handling ServicesMIL-PRF-49147D (CR) 2.1.2 Reference 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 are
7、those cited in the solicitation (see 6.2.c). DRAWINGS USA COMMUNICATIONS - ELECTRONICS COMMAND SM-D-771327 - Lens Assembly Eyepiece (Copies of specifications, standards, drawings and publications required by contractors in connection with specific procurement functions should be obtained from the pr
8、ocuring activity or as directed by the contracting officer. ) 2.2 Order of precedence. 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 regulatio
9、ns unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Description. The eyepiece is mounted to and is part of the Viewer, Drivers Night Vision AN/WS-2(V). 3.2 Construction. The eyepiece shall be constructed to assure compliance with the contract configuration baseline and in accordanc
10、e with SM- D-771327 as applicable. 3.3 First article testing (FAT). When specified in the contract or purchase order (see 6.2.e and 6.2.9) the contractor shall furnish eyepieces for FAT inspection and approval (see 4.2). 3.4 Materials. The contractor shall select parts and materials that are fully c
11、apable of meeting all operational and environmental requirements specified herein. The materials specified in the applicable drawings are recommended, but not mandatory. Selection criteria of the class, grade or type part shall ensure the material will be able to perform its intended function when i
12、t is assembled. Verification of the supplier meeting the overall performance requirements shall be the governing acceptance standard. Recovered materials shall be used to the maximum extent possible. 3.5 Performance characteristics. 3.5.1 Diopter setting. The eyepiece shall be set at -2.0, +0.3/-0.1
13、 diopter as viewed from a distance of 50 millimeters (mm) on axis when installed on the AN/WS-2 (V) . 2 Licensed by Information Handling ServicesMIL-PRF-49147D (CR) 3.5.2 Resolution. The eyepiece shall have a minimum resolution of 20 lp/mm when measured using a high contrast USAF 1951 Resolution Pow
14、er Test Target (clear lines on black background or black lines on a clear background) and viewed binocularly from a 50 mm eye relief. 3.5.3 Magnification. The on-axis magnification shall be between 3.75 and 4.0. 3.5.4 Transmission. The transmission of the eyepiece shall be 80 percent minimum for the
15、 region of spectral output of a P-20 phosphor. 3.5.5 Field of view. The field of view of the eyepiece shall be 42.5 degrees minimum. 3.5.6 Field flatness. The field flatness shall deviate no more than 1/4 diopter over a 46 mm format with a 100 mm radius of curvature for the fiber optic magnifier out
16、put. 3.6 Environmental. Verification of conformance after environmental tests shall be Diopter setting (3.5.1), Resolution (3.5.2) and Transmission (3.5.4). 3.6.1 Temperature Extremes. The eyepiece shall not be damaged nor suffer degradation of performance (see 3.10.1 and 3.10.4) after being subject
17、ed to storage at +68C or -51C. The eyepiece shall not be damaged nor suffer degradation of performance (see 3.10.1 and 3.10.4) after being subjected to repetitive changes between +23C and +68C within 5 minutes and between +23C and -51C within 5 minutes. Soak time at each temperature extreme shall be
18、 sufficient for the eyepiece to attain temperature stabilization. Time for temperature stabilization is defined as the amount of time required for the most internal part of the unit under test to achieve the specified temperature. 3.6.2 Immersion. The eyepiece shall not be damaged (see 3.10.1) after
19、 being immersed in fresh water to a depth of not less than 3 feet for a period of not less than 30 minutes. The eyepiece shall be pre-conditioned by exposure to a temperature of +45C I3C for a period of 2 hours prior to being immersed in the fresh water at a temperature of +18C I5C. 3.6.3 Vibration.
20、 The eyepiece shall not be damaged nor suffer degradation of performance (see 3.10.1 and 3.10.4) after being subjected to vibration equivalent to that encountered in tracked vehicles, during 5000 miles of operation. Vibration shall be limited to one sine sweep from 5.0 to 500 Hertz (Hz.) and back to
21、 5.0 Hz. within 15 minutes in the vertical axis only. Vibration shall be performed from 5.0 to 5.5 Hz at 1 inch displacement, 5.5 to 30 Hz. at 1.5 gs peak, 30 to 50 Hz. at 0.33 inch displacement and 50 to 500 Hz. at 4.2 gs peak (see 3.10.5). 3 Licensed by Information Handling ServicesMIL-PRF-49147D
22、(CR) 3.6.4 Shock. 3.6.4.1 Basic shock. The eyepiece shall not be damaged nor suffer degradation of performance (see 3.10.1 and 3.10.4) after being subjected to basic shock of 40gs (see 3.10.5) at 18 milliseconds. 3.6.4.2 Weapon shock. The eyepiece shall not be damaged nor suffer degradation of perfo
23、rmance (see 3.10.1 and 3.10.4) after being subjected to simulated weapon firing shock of 100 gs (see 3.10.5)at 1.5 milliseconds one half sine pulse. 3.7 Treatment and paintings. Treatment and painting shall be anti- reflective, shall be rust resistant and as specified on applicable drawings unless o
24、therwise specified in the contract or purchase order. 3.8 Marking. Marking shall be in accordance with applicable drawings unless otherwise specified in the contract or purchase order. 3.9 Workmanship. Standards of workmanship shall be such that the eyepiece will meet all requirements of this specif
25、ication and any referenced specifications or drawings. 3.10 Technical interpretations. The following technical interpretations are, when referenced in sections 3 or 4, mandatory for this specification. 3.10.1 Damage. Damage is defined as any breakage, loosening, shift, dents, failure of any finish,
26、hardware, connection, or component, or condensation, fogging or moisture on any internal surface. 3.10.2 Ambient temperature. Ambient temperature is defined as +23OC, I looc. 3.10.3 Environmental temperature. Environmental chamber temperature shall be controlled to within I5OC of the specified tempe
27、rature unless otherwise specified. 3.10.4 Degradation of performance. Any deterioration in quality, or failure to operate in accordance with the requirements of this specification. 3.10.5 iig“. iig“ is defined as an acceleration or deceleration of 32.17 feet per secondper second. 4. VERIFICATION 4.1
28、 Classification of inspection. Inspection shall be classified as follows : a. First article tests (4.2) b. Conformance inspection (4.3) 4 Licensed by Information Handling ServicesMIL-PRF-49147D (CR) Inspection Diopter setting Resolution Transmission Field of view Field flatness Magnification 4.2 Fir
29、st article testing. When specified in the contract or purchase order (see 6.2.g),(see 3.3) shall be performed by the contractor. The quantity of first article test samples shall be as specified in the contract or purchase order (see 6.2.e) and shall be selected from the first production lot. Require
30、ment Paragraph 3.5.1 3.5.2 3.5.3 3.5.4 3.5.5 3.5.6 4.2.1 FAT Test. Each eyepiece in the first production lot shall be subjected to the performance tests of Table I, which may be performed in any order . After completion of this testing, eyepieces selected as samples for FAT testing shall be subjecte
31、d to the tests of Table II, which may be performed in any order with the exception that immersion shall be performed last. Failure of any test shall be cause for rejection of that eyepiece and may be cause for rejection of the FAT. Inspection Temperature Extremes Immer s i on Vibration Shock TABLE I
32、. Unit first article testina Requirement Paragraph 3.6.1 3.6.2 3.6.3 3.6.4 TABLE II. Samxle first article testina. 4.2.1.1 Disposition of FAT samples. Disposition of FAT samples shall be as specified in the contract or purchase order (see 6.2.e). 4.3 Conformance inspection. Requirements for conforma
33、nce inspections shall be as specified in the contract or purchase order (see 6.2.f). Unless otherwise specified, all tests shall be performed at ambient temperature (see 3.10.2) 5. PACKAGING 5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract or
34、purchase order (see 6.2.h). When actual packaging of materials is to be perfumed by DoD personnel, these personnel need to contact the responsible packaging activity to ascertain requisite packaging requirements. Packaging requirements are maintained by the Inventory Control Points packaging activit
35、y within the Military Department of Defense agency, or within the Military Departments System Command. Packaging data retrieval is available from the managing Military Departments or Defense Agencys automated packaging files, CE-ROM products, or by contacting the responsible packaging activity. 5 Li
36、censed by Information Handling ServicesMIL-PRF-49147D (CR) 6. NOTES (This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.) 6.1 Intended use. The eyepiece covered by this specification is intended for use in the Viewer, Drivers Night Vision A
37、N/WS-2(V), an optical viewing device capable of directing the line of sight to the drivers eyes. 6.2 Acquisition requirements. Acquisition documents must specify the following: a. b. C. d. e. f. 9. h. Title, number, and date of this specification. Necessary actions by contractor in the event of a lo
38、t failure. Issue of DODISS to be cited in the solicitation, and if required, the specific issue of individual documents referenced (see 2.1.1 and 2.1.2). Sampling plans for Group B and Group C testing. Quantity and schedule of FAT and disposition of FAT samples. Statement identifying that the contra
39、ctor must submit his proposal for conformance inspection to include specific requirements to be verified and the sampling plan to be used to provide the desired confidence level. Statement specifying that FAT testing is, or is not, required. Packaging requirements. 6.3 Definitions. See 3.10. 6.4 Sub
40、iect term kevword listina. Diopter setting Field flatness Field of view Magnification Resolution Transmission 6 Licensed by Information Handling ServicesMIL-PRF-49147D (CR) 6.5 Changes from previous issue. Marginal notations are not used in this revision to identify changes with respect to the previous issue due to the extensive changes. Custodian: Army - CR Preparing Activity: Army - CR Project 5855-0137 7 Licensed by Information Handling Services
