ARMY MIL-PRF-49367C-1999 LENS ASSEMBLY OBJECTIVE 155MM AN TVS-5.pdf

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1、MIL-PRF-49367C m b 2087787 I64 W 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 Stan

2、dardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. INCH-POUND 1 I MIL-PRF-49367C (CR) 4 March 1999 SUPERSEDING MIL-L-49367B (CR) 24 August 1990 PERFORMANCE SPECIFICATION LENS ASSEMBLY, OBJECTIVE, 155MM AN/TVS-5 This specification is approved

3、for use by 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, 155mm AN/TVS-5 (see 6.1). 2. APPLICABLE DOCUMENTS 2.1 Gen

4、eral. The documents 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 ensure the completeness of this l

5、ist, document users are cautioned that they must meet all specified requirements cited in sections 3 ad 4 of this specification, whether or not they are listed. I AMSC N/A FSC 5855 DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited. Copyright Communications - Electronic

6、s Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-flIL-PRF-413b7C I 979990b 2087768 6TO MIL-PRF-49367C (CR) 2.1.1 Reference documents, drawings and publications. The following other Government documents, drawings and p

7、ublications 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-ELECTRONICS COMMAND SM-D-850130 - Lens Assembly, Objective, AN/TVS-5 (Copies of specifications, standards, draw

8、ings, 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 the references cited h

9、erein, 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 referred to as the objective, is part of the Night Visi

10、on Sight, Crew Served Weapon, AN/TVS-5. 3.1.1 First article testing (FAT) When specified in the contract or purchase order, the contractor shall furnish FAT objectives for inspection and approval (see 4.2) . 3.2 Construction. The objective shall be constructed to assure compliance with the contract

11、configuration baseline and in accordance with SM-D-850130 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 herein. The materials specified in the applicable drawings are reco

12、mmended, 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 requirements shall be the governing acceptance standard. Recover

13、ed 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 as applicable. 2 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo

14、reproduction or networking permitted without license from IHS-,-,-MIL-PRF-49367C 9999906 2087789 737 m MIL-PRF-4 9367C (CR) 3.5 Performance characteristics. 3.5.1 Equivalent focal length. The equivalent focal length of the objective lens shall be 155 mm, +1 mm. 3.5.2 Flange focal distance. The flang

15、e focal distance shall be 1.20 mm, kO.50 mm. 3.5.3 T-number. The T-number of the objective lens shall not be greater than T/1.70 measured with a S-20 extended red (ER) photomultiplier tube and a 2854, 2200 Kelvin (KI light source. 3.5.4 Veiling glare/stray light. The veiling glare/stray light lumina

16、nce 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 than 2 percent pincushion at the edge

17、of the 25m format. 3.5.6 Field of view. The field of view of the objective shall be a minimum of 156 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 across the 25mm format by more than It80 pe

18、rcent of maximum value. 3.5.8 Modulation transfer function. 3.5.8.1 The modulation transfer function (MTF) 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. The measurement shall be made over the spectral band as defined by the

19、 S-20 Extended Red Response Curve. 3.5.8.2 Alternate method for verification of MTF. The MTF requirement or the objective may be verified by attaching the objective to the battery housing assembly, eyepiece assembly and image intensifier assembly to assemble a sight per MIL-PRF-49064E. Verification

20、of the requirements of paragraph 3.6.3, Resolution, of MIL-PRF-49064E 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 pattern viewed by the observer using the sight. One control shall m

21、ove 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. Adjustment will be apparent to the operator by tactile indexi

22、ng 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-473b7C II 77779Ob 2087770 457 111 MIL-PRF-49367C (CR) 3.5.9.1 Adjustment accuracy. Each click of

23、either adjustment control shall displace the reticle pattern 0.25 I 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 dynamic torque required to adjust the reticle position

24、 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 distance (3.5.2), Veiling glare/stray light (3.5.4) and

25、 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. The objective shall not be damaged (see 3.10.1) after

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

27、 +68OC shall include a 2 hour soak at +23OC. Soak time at temperature extremes shall be sufficient for the entire objective to attain stabilization. 3.6.2 Vibration. The objective shall not be damaged (see 3.10.1) after being subjected to simple harmonic motion having an amplitude of 0.015 inch, (0.

28、03 inch total excursion) with the frequency being varied between 5 and 55 hertz (Hz). The duration shall be five (5) minutes minimum in each of three (3) mutually perpendicular planes of which one (1) is perpendicular to the optical axis. 3.6.3 Altitude. The objective shall not be damaged (see 3.10.

29、1) after storage at a pressure equivalent to 10,000 feet altitude above sea level. 3.6.4 Humidity. The objective shall not be damaged (see 3.10.1) after storage up to +68OC with 95, f5 percent relative humidity. 3.6.5 Immersion. The objective shall not be damaged (see 3.10.1) after being immersed in

30、 fresh water to a depth of not less than 3 feet for a period of not less than 30 minutes. The objective shall be pre-conditioned by exposure to a temperature of i45OC f3OC for a period of 2 hours prior to being immersed in the fresh water at a temperature of +18OC +5OC. 4 Copyright Communications -

31、Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-49367C 777750b 2087791 375 MIL- PRF- 4 93 67 C ( CR) 3.6.6 High intensity shock. The objective shall not be damaged (see 3.10.1) by a sequence of 3 sh

32、ocks 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, +5 percent. Shock pulses applied along the axes horizontal and

33、 perpendicular to the optical axis shall have peak amplitude of 50gs (see 3.10.21, I15 percent. Shock pulses applied along the optical axis shall have a peak amplitude of 100, fl5gs (see 3.10.2). a 3.7 Marking. Marking shall be in accordance with applicable drawings unless otherwise specified in the

34、 contract or purchase order. 3.8 Workmanship. Workmanship standards shall be such that the objective will meet all requirements of this specification and any reference specifications or drawings. 3.9 Treatment and Paintinq. Treatment and painting shall be in accordance with the applicable drawings u

35、nless otherwise specified in the contract or purchase order. 3.10 Technical 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

36、, hardware, connection or component; leakage or condensation of moisture within the objective lens; 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 Ambient Temperature. Ambient temperature is d

37、efined as +23OC, flOC. 3.10.4 Environmental temperature. Environmental chamber temperatures shall be controlled to within I5OC. 4. VERIFICATION 4.1 Classification of inspection. Inspection shall be classified as follows : a. First article testing (4.2). b. Conformance inspection (4.3). 5 Copyright C

38、ommunications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-flIL-PRF-493b7C 111 0b 2087792 221 II Inspection Effective focal length Flange focal distance T-number Veiling Glare Linear distortion Field o

39、f View Relative illumination Modulation transfer function Reticle movement I 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 MIL-PRF-49367C (CR) Inspection Temperature Extremes Vibration Alt i tude Humidity Imme r s i on High intensity shock 4.2 First article testing. Whe

40、n specified in the contract or purchase order (see 6.2.f), first article testinq shall be performed by the contractor. Requirement Paragraph 3.6.1 3.6.2 3.6.3 3.6.4 3.6.5 3.6.6 The quantity of first article test samples shall be as specified in the contract or purchase order (see 6.2.b) and shall be

41、 selected from the first production lot. 4.2.1 FAT testing. Each objective in the FAT lot shall be subjected to the i?spections 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)

42、. Failure of any inspections 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 temperature extremes and temperature shock. Table I. Unit first article testing. Table II. Sample fi

43、rst article testing. 4.2.3 Disposition of FAT samples. After successful completion of the FAT, the FAT samples shall be refurbished and delivered in accordance with the contract or purchase order (see 6.2.b). 4.3 Conformance inspection. Requirements for conformance inspection shall be a specified in

44、 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 - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license fr

45、om IHS-,-,-MIL-PRF-49367C b 2087793 LbB U MIL- PRF- 4 93 67 C ( CR) 5. PACKAGING 5.1 Packaging 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

46、 or explanatory nature that may be helpful, but is not mandatory.) 6.1 Intended use. The objective is used with the Night Vision Sight, Crew Served Weapon, AN/TVS-5 for aimed firing at night of crew served weapons. 6.2 Acquisition requirements. Acquisition documents must specify the following: a. Ti

47、tle, number, and date of this specification. b. Quantity and schedule for FAT testing and disposition of EAT c. . Necessary actions by the contractor in the event of a lot d. Issue of DODISS to be cited in the solicitation, and if samples (see 4.2) . failure. required, the specific issue of individu

48、al documents referenced (see 2.1.1). proposal for conformance inspection to include specific requirements to be verified and the sampling plan to be used to provide the desired confidence level. and sampling requirements for FAT. e. Statement identifying that the contractor must submit his f. Statem

49、ent specifying that FAT testing is, or is not, required g- Packaging and preservation (see section 5). 6.3 Definitions. See 3.10. 6.4 Subject term keyword listing. Lens Assembly Ob j ec t ive 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 5855-0198 7 Copyright Communica