1、MIL-PRF-413bBC U 7777706 2087208 T23 I 1 INCH-POUND I MIL-PRF-49368C (CR) 4 March 1999 SUPERSEDING MIL-L-49368B (CR) 27 May 1992 PERFORMANCE SPECIFICATION LENS ASSEMBLY, EYEPIECE, AN/PVS-4 AND AN/TVS-5 This specification is approved for use by US Army Communications- Electronics Command, Department
2、of the Army, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the Lens Assembly, Eyepiece, AN/PVS-4 and AN/TVS-5 (see 6.1). 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in s
3、ections 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 ensure the completeness of this list, document users are cautioned that they must meet
4、all specified requirements in sections 3 and 4 of this specification, whether or not they are listed. Beneficial comments (recommendation, additions, deletions) and any data which may be of use in improving this document should be addressed to HQ, USA Communications-Electronics Command ATTN: AMSEL-L
5、C-LEO-E-EP Fort Monmouth, NJ 07703-5023 by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A FSC 5855 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Copyright Communications - Electro
6、nics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-flIL-PRF-49368C RI 99Ob 2087209 9bT 111 MIL-PRF-49368C (CR) 2.1.2 Reference documents, drawings and publications. The following other Government documents, drawings
7、and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issues are those cited in the solicitation (see 6.2.d). DRAW IN G S USA COMMUNICATIONS-ELECTRONICS COMMAND SM-D-850400 - Lens Assembly, Eyepiece, AN/PVS-4 and AN/TVS-5 (Copies of specificati
8、ons, standards, drawings, and publications required by contractors in connection with specific procurement functions should be obtained from the procuring 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 th
9、e references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Description. The Lens Assembly, Eyepiece, herein referred to as the eyepiece assembl
10、y, is part of the Night Vision Sight, Individual Served Weapon, AN/PVS-4 and Night Vision Sight, Crew Served Weapon, AN/TVS-5. 3.2.1 First Article Testing (FAT). When specified in the contract or purchase order (see 6.2.f), the contractor shall furnish FAT eyepiece assemblies for inspection and appr
11、oval (see 4.2). 3.3 Construction. The eyepiece assembly shall be constructed to assure compliance with the contract configuration baseline and in accordance with SM-D-850400 as applicable. 3.4 Material. The contractor shall select parts and materials that are fully capable of meeting all of the oper
12、ational 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 it is assembled. Verificati
13、on 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 Components. The eyepiece assembly shall consist of optical components assembled within a housing as specified on the drawi
14、ngs. 2 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-IIL-PRF-443bBC = 9999906 2087230 bB1i 4 MIL-PRF-49368C (CR) 3.6 Performance characteristics. 3.6.1 Effective focal length. T
15、he effective focal length shall be 26.5, k 0.3mm. 3.6.2 Flange focal distance. The flange focal distance of the eyepiece assembly at zero diopter shall be 4.753 f 0.207, -0.435mm. 3.6.3 Field curvature. The field curvature of the eyepiece assembly shall deviate no more than +1/4 diopter over the ful
16、l 25m.n flat format. 3.6.4 Linear distortion. The linear distortion of the eyepiece assembly shall be between O and 9 percent pincushion distortion at the edge of the 25mm format. 3.6.5 Exit pupil. The exit pupil diameter shall be 5.0, f 0.2mm at eye relief of 28.0, IO.5mm. 3.6.6 Transmission. The t
17、ransmission of the eyepiece assembly shall be not less than 80 percent over the full eyepiece assembly aperture for the spectral output of the P-20 phosphor. 3.6.7 Resolution. The eyepiece shall have an on-axis resolution of not less than 50 lp/mm. The resolution measurement shall be made using a 28
18、56K light source filtered to simulate the phosphor. 3.6.8 Diopter adjustment. The diopter adjustment shall operate smoothly, without binding, throughout its complete range of movement at all operating temperatures specified herein. Dynamic torque shall be between 2 and 20 inch-pounds. 3.6.9 Diopter
19、range. The eyepiece assembly focus range shall not be less than 8 diopters when one rotational stop is set at -6 (+1/4 -0) diopters. 3.7 Environmental. NOTE: Post-environmental verification of performance shall be Exit pupil (3.6.5), Transmission (3.6.6) and Resolution (3.6.7). Failure to meet these
20、 requirements shall constitute failure due to degradation of performance of input or output characteristics per the damage technical interpretation of 3.10.1. 3.7.1 Temperature Extremes. The eyepiece assembly shall not be damaged (see 3.10.1) after storage in any temperature from -51OC to +68OC. The
21、 eyepiece assembly shall not be damaged (see 3.10.1) after being subjected to repetitive temperature changes between +23“C and +68C in 5 minutes and between +23OC and -51OC in 5 minutes. The transition from +68OC to -5loC and from -51OC to +68OC shall include a 2 hour soak at +23Oc. Soak time at tem
22、perature extremes shall be sufficient or the entire eyepiece assembly to attain stabilization. 3 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-49368C MIL-PRF-49368C (CR)
23、 3.7.2 Vibration. The eyepiece assembly shall not be damaged (see 3.10.1) after being subjected to simple harmonic motion having an amplitude of 0.015 inch (0.03 inch total excursion) with the frequency being varied between 5 and 55 hertz (Hz). Vibration shall be applied in 3 mutually perpendicular
24、planes, one of which is perpendicular to the optical axis. The duration of vibration shall be 5 minutes in each plane. 3.7.3 Altitude. The eyepiece assembly shall not be damaged (see 3.10.1) after storage at a pressure equivalent to 10,000 feet altitude above sea level. 3.7.4 Humidity. The eyepiece
25、assembly shall not be damaged (see 3.10.1) after storage up to +68“C minimum with 95 f 5 percent relative humidity. 3.7.5 Immersion. The eyepiece assembly shall not be damaged (see 3.10.1) after being immersed in fresh water to a depth of not less than 3 feet for a period of not less than 30 minutes
26、. The eyepiece assembly shall be pre- conditioned by exposure to a temperature of +45“C I3“C for a period of 2 hours prior to being immersed in the fresh water at a temperature of +18“C f5C. 3.7.6 High intensity shock. The eyepiece assembly shall not be damaged (see 3.10.1) by a sequence of 3 shocks
27、 applied in each direction along each of 3 mutually perpendicular axes (horizontal, vertical, and optical axis when the reticle pattern is erect). The shocks shall be half sine pulses and shall have a time duration of 4 milliseconds I5 percent. Shock pulses applied along the axes horizontal and perp
28、endicular to the optical axis shall have a peak amplitude of 50gs I15 percent (see 3.10.2). Shock pulses applied along the optical axis shall have a peak amplitude of 100 tl5gs. 3.8 Marking. Marking shall be in accordance with applicable drawings unless otherwise specified in the contract or purchas
29、e order. 3.9 Workmanship. Workmanship standards shall be such that the eyepiece assembly will meet all requirements of this specification and any referenced specifications or drawings. 3.10 Technical interpretations. The following technical interpretations, when referenced in sections 3 or 4, are ma
30、ndatory for this specification. 3.10.1 Damage. Breakages, loosening, shifting, evidence of corrosion or failure of any finish, hardware, connection or component; leakage or condensation of moisture within the eyepiece assembly; or degradation in input or output characteristics. 3.10.2 x- “g“ is defi
31、ned as an acceleration or deceleration of 32.17 feet per second per second. 3.10.3 Ambient temperature. Ambient temperature is defined as +23C 2 10C. 3.10.4 Environmental temperature. Environmental chamber temperature shall be controlled within t5“C of the specified temperature unless otherwise spec
32、ified. 4 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-fiIL-PRF-49368C 99999Ob 2087232 454 m Inspection Effective focal length Flange focal length Field curvature Linear distort
33、ion Exit pupil Transmission Resolution Diopter adjustment Diopter range MIL-PRF-4 9368C (CR) Requirement Paragraph 3.6.1 3.6.2 3.6.3 3.6.4 3.6.5 3.6.6 3.6.7 3.6.8 3.6.9 4. VERIFICATION Inspection 4.1 Classification of inspection. Inspection shall be classified as follows: a. First article testing (4
34、.2). b. Conformance inspection (4.3). 4.2 First article testing. When specified in the contract or purchase order (see 6.2.f) first article testing shall be performed by the contractor. The quantity of initial production test samples shall be as specified in the contract or purchase order (see 6.2.b
35、). Paragraph 4.2.1 FAT Testing. Each eyepiece assembly in the FAT lot shall be subjected to the inspections of Table I. Samples selected from the lot shall be subjected to the inspections of Table II. Sample size shall be as specified in the contract or purchase order (see 6.2.b). Failure of any ins
36、pection shall be cause for rejection of that eyepiece assembly and may be cause for rejection of the FAT. Inspections may be performed in any order except for Immersion, which shall follow temperature extremes and temperature shock. Vibiat ion 3.1.2 Alt i tude 3.7.3 Humidity 3.1.4 Immersion 3.1.5 Hi
37、gh intensity shock 3.7.6 ? Table I Unit first article testing. Table II Sample first article testing. I I Requirement 5 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-493
38、68C I 9999906 2087233 390 6 MIL-PRF-49368C (CR) 4.3 Conformance inspection. Requirements for conformance inspections shall be as specified in the contract or purchase order (see 6.2.e). Unless otherwise specified, all tests shall be performed at ambient temperature (see 3.10.3). 5. PACKAGING 5.1 Pac
39、kaging requirements. Packaging and preservation shall be best commercial practice unless otherwise specified in the contract or purchase order (see 6.2.g). 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
40、 eyepiece assembly is used for aimed firing at night with the Night Vision Sight, Individual Served Weapon, AN/PVS-4 and the Night Vision Sight, Crew Served Weapon, AN/TVS-5. 6.2 Acquisition requirements. Acquisition documents must specify the following: a. b. C. d. e. f. g- Title, number, and date
41、of specification. Quantity and schedule for FAT testing and disposition of FAT samples. Necessary actions by the contractor in the event of a lot failure (see 4.5.4 ) . Issue of DODISS to be cited in the solicitation, and if required, the specific issue of individual documents referenced (see 2.1.1
42、and 2.1.2.) Statement identifying that the contractor 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 and sampli
43、ng requirements for FAT. Packaging and preservation (see section 5). 6.3 Definitions. See 3.10 6.5 Subject term keyword listing. Eyepiece Eyepiece assembly 6.6 Changes from previous issue. Marginal notations are not used in this revision to identify changes with respect to the previous issue due to
44、the extensive changes. 6 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4 flIL-PRF-473bC E 7777706 2087214 227 MIL-PRF-49368C (CR) Custodian: Army - CR Preparing Activity: Army - CR Project 5855-0199 7 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
