ARMY MIL-PRF-49366C-1999 LENS ASSEMBLY OBJECTIVE 95MM AN PVS-4.pdf

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1、MIL-PRF-Y93bbC - 99999Ob 2086607 823 Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving the document should be addressed to: HQ, USA Communications-Electronics Command, ATTN: AMSEL-LC- LEO-E-EP Fort Monmouth, NJ 07703-5023 by using the

2、 Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. I J MIL-PRF-49366C (CR) 4 March 1999 SUPERSEDING MIL-L-4 9366B (CR) 27 May 1992 PERFORMANCE SPECIFICATION LENS ASSEMBLY, OBJECTIVE, 95MM AN/PVS-4 This specification is approved for use b

3、y US Army Communications- Electronics Command, Department 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, Objective, 95mm AN/PVS-4 (see 6.1), which is referred to herein as the object

4、ive lens. 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in I 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

5、has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements cited in sections 3 and 4 of this specification, whether or not they are listed. AMSC N/A FSC 5855 DISTRIBUTION STATEMENT A: Approved for public release; distribution is

6、 unlimited. Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-493bbC 99999Ob 2OBbbD8 7bT E MIL-PRF-4 9366C (CR) 2.1.1 Reference documents, drawings, and publications. The fo

7、llowing other Government documents, drawings, 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). DRAWINGS USA COMMUNICATIONS-ELECTRONICC COMMAND SM-D-850320 - Lens Assembly, Objective,

8、AN/PVS-4 (Copies of specifications, 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 t

9、he 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 regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Description. The Lens Assembly, Objective, herein ref

10、erred to as the objective, is part of the Night Vision Sight, Individual Served Weapon, AN/PVC-4. 3.1.1 First article testing (FAT) When specified in the contract or purchase order, the contractor shall furnish FAT objective lenses for inspection and approval (see 4.2). 3.2 Construction. The objecti

11、ve shall be constructed to assure compliance with the contract configuration baseline and in accordance with SM- D-850320 as applicable. 3.3 Material. The contractor shall select parts and materials that are fully capable of meeting all of the operational and environmental requirements specified her

12、ein. 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. Verification of the supplier meeting the overall performance

13、requirements shall be the governing acceptance standard. Recovered materials shall be used to the maximum extent possible. 3.4 Components. The objective shall consist of optical components assembled within a housing as specified on the drawing(s). 2 Copyright Communications - Electronics Command Pro

14、vided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-493bbC 999990b 208bbO bTb II MIL-PRF-49366C (CR) 3.5 Performance characteristics. 3.5.1 Effective focal length. The effective focal length of the objective shall be 95m, I I

15、mm. 3.5.2 Flange focal distance. The flange focal distance shall be 1.20mm, k 0.5Om. 3.5.3 T-number. The T-number of the objective shall not be greater than T/1.70 measured with an S-20 extended red (ER) photomultiplier tube and a 2854, I 200 Kelvin (K) light source. 3.5.4 Veiling glare/stray light.

16、 The veiling glare/stray light luminance contribution shall not be greater than 2.5 percent of total illumination when viewing a black spot subtending 1 in the, field of view centered in a uniformly illuminated 180 field. 3.5.5 Linear distortion. The linear distortion of the objective shall be less

17、than 2 percent pincushion at the edge of the 25mm format. 3.5.6 Field of view. The field of view of the objective shall be a minimum of 253 milliradians when measured across a 25mm format. 3.5.7 Relative illumination. The relative illumination of the image formed by the objective shall not vary acro

18、ss the 25m format by more than +. 80 percent of maximum value. 3.5.8 Modulation transfer function (MTF). 3.5.8.1 Modulation transfer function. The modulation transfer function shall meet the requirements of Figures 1 and 2 when measured on-axis and off-axis (2/3 field) all in the same focal plane. T

19、he measurement shall be made over the spectral band as define by the S-20 Extended Red (ER) Response Curve. 3.5.8.2 Alternate method for verification of MTF. The MTF requirement for the objective can be verified by attaching the objective to the battery housing assembly, eyepiece assembly and image

20、intensifier to assemble a sight per MIL-PRF-49063. Verification of the requirements of paragraph 3.6.3, Resolution, of MIL-PRF-49063 at the sight level shall verify the MTF requirement of the objective. 3.5.9 Reticle movement. Two external control knobs shall control the position of the reticle patt

21、ern viewed by the observer using the sight. One control shall move the reticle pattern in azimuth; another control shall move the reticle pattern in elevation. An adjustment made by turning one control shall not cause the reticle to deviate from a straight line of travel by more than 0.5 milliradian

22、. Adjustment will be apparent to the operator by tactile indexing with audible clicks. 3 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-493bbC = b 208bbL 318 MIL-PRF-4 93

23、 66C (CR) 3.5.9.1 Adjustment accuracy. Each click of either adjustment control shall displace the reticle pattern 0.25 f 0.04 milliradian. 3.5.9.2 Reticle excursion. The reticle adjustment controls shall move the reticle a minimum of 2.5 in any direction from the optical axis. 3.5.9.3 Torque. The dy

24、namic torque required to adjust the reticle position shall be between 0.5 and 4.0 inch pounds. 3.5.9.4 Rotational alignment. The reticle shall not appear rotated more than 1 from its proper orientation. 3.6 Environmental. NOTE: Post-environmental verification of performance shall be Flange focal dis

25、tance (3.5.2), Veiling glare/stray light (3.5.4) and Modulation transfer function (3.5.8). Failure to meet these requirements shall constitute failure due to degradation of performance of input or output characteristics per the damage technical interpretation of 3.10.1. 3.6.1 Temperature extremes. T

26、he objective shall not be damaged (see 3.10.1) by storage in any temperature from -51 to +68C. The objective shall not be damaged (see 3.10.1) after being subjected to repetitive temperature changes between +23 and +68OC in a 5 minute period and between +23“ and -51OC in a 5 minute period. Soak time

27、 at temperature extremes shall be sufficient for the entire objective to attain 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 Vibration. The objective shall not

28、 be damaged (see 3.10.1) after being subjected to simple harmonic motion having an amplitude of 0.015 inch, (0.030 inch total excursion) with the frequency being varied between 5 and 55 hertz (Hz). Vibration shall be applied in 3 mutually perpendicular planes, one of which is perpendicular to the op

29、tical axis. The duration shall be five (5) minutes minimum in each plane. 3.6.3 Altitude. The objective shall not be damaged (see 3.10.1) when stored in a non-operational mode at a pressure effective to 10,000 feet altitude above sea level for a period of not less than 3 hours. 3.6.4 Humidity. The o

30、bjective shall not be damaged (see 3.10.1) when subjected to an atmosphere with relative humidity of 95, k 5 percent over a temperature range of +20C to +65C. 3.6.5 Immersion. The objective 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

31、 period of not less than 30 minutes. The objective shall be pre-conditioned by exposure to a temperature of +45*C f3C for a period of 2 hours prior to being immersed in the fresh water at a temperature of +18C 15C. 4 Copyright Communications - Electronics Command Provided by IHS under license with C

32、RAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-473bbC m 99919Ob 208bbLL 254 U MIL-PRF-4 93 6 6C (CR) 3.6.6 High intensity shock. The objective shall not be damaged (see 3.10.1) by a sequence of 3 shocks applied in each direction along each of the 3 mutu

33、ally 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, tr 5 percent. Shock pulses applied along the axes horizontal and perpendicular to the optical axis shall have a p

34、eak amplitude of SOg5, +. 15 percent (see 3.10.2). Shock pulses applied along the optical axis shall have a peak amplitude of 100, f 15gs. 3.7 Marking. Marking shall be in accordance with the drawing unless otherwise specified in the contract or purchase order. 3.8 Workmanship. Workmanship standards

35、 shall be such that the objective will meet all requirements of this specification and any referenced specifications or drawings. 3.9 Treatment and painting. Treatment and painting shall be in accordance with the applicable drawing unless otherwise specified in the contract or purchase order. 3.10 T

36、echnical interpretations. The following technical interpretations, when referenced in Sections 3 or 4, are mandatory for this specification . 3.10.1 Damage. Breakage, loosening, shifting, evidence of corrosion or failure of any finish, hardware, connection or component; leakage or condensation of mo

37、isture, on the objective; or degradation in input or output characteristics. 3.10.2 T. “g“ is defined as an acceleration or deceleration of 32.17 feet per second per second. 3.10.3 Room temperature. Room temperature is defined as +23C, I 10C. 3.10.4 Environmental temperature. Environmental chamber t

38、emperatures shall be controlled to within k 5C. 4. VERIFICATION 4.1 Classification of inspection. Inspection shall be classified as follows : a. First article testing (4.2). b. Conformance inspection (4.3). J 5 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot

39、 for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-49366C (CR) Inspection Effective focal length Flange focal length T - numb e r Linear distortion Field of view Relative illumination Modulation transfer function Reticle movement Veiling glare/stray light 4.2 Fir

40、st article testing (FAT). When specified in the contract or purchase order (see 6.2.f), first article testing 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.b) and shall be selected from the first prod

41、uction lot. Requirement Paragraph 3.5.1 3.5.2 3.5.3 3.5.4 3.5.5 3.5.6 3.5.7 3.5.8 3.5.9 4.2.1 FAT testing. Each objective in the FAT lot shall be subjected to the inspections of Table I. Samples selected from the lot shall be subjected Inspection Temperature extremes Vibration Alt i tude Humidity Im

42、iier si on High intensity shock to the inspections of Table II. contract or purchase order (see 6.2.b). Failure of any inspection shall be cause for rejection of that objective and may be cause for failure of the FAT. Inspections may be performed in any order except for Immersion, which shall follow

43、 temperature extremes and temperature shock. Sample size shall be as specified in the Re qu i r eme nt Paragraph 3.6.1 3.6.2 3.6.3 3.6.4 3.6.5 3.6.6 4.2.2 Disposition of FAT samples. After successful completion of the FAT, the FAT samples shall be refurbished and delivered in accordance with the con

44、tract or purchase order (see 6.2.b). 4.3 Conformance inspection. Requirements for conformance inspection 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). 6 Copyright Communications - Ele

45、ctronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-493bbC 999990b 20bbL3 027 W I MIL-PRF-4 9366C (CR) 5. PACKAGING 5.1 Packaging requirements. For acquisition purposes, the packaging requirements shall be

46、 as specified in the contract or purchase order (see 6.2.g). When actual packaging of material is to be performed by DoD personnel, these personnel need to contact the responsible packaging activity to ascertain requisite packaging requirements. Packaging requirements are maintained by the Inventory

47、 Control Points packaging activity 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, CD-ROM products, or by contacting the res

48、ponsible packaging activity. 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 objective is used with the Night Vision Sight, Individual Served Weapon AN/PVS-4 for aimed firing at night of individual serve

49、d weapons. 6.2 Acquisition requirements. Acquisition documents must specify the following: a. Title, number, and date of this specification. b. Quantity and schedule for FAT and disposition of FAT samples. c. Necessary actions by the contractor in the event of a lot failure. d. Issue of DODISS to be cited in the solicitation, and if required, the specific issue of individual documents referenced (see 2.1 and 2.1.1). proposal for conformanc