1、-. .- I I 2 * NIL-E-LI7383 58 7799706 0363635 7 m r ,- MIL-E-49383(ER) 16 June 1980 MILITARY SPECIFICATION EYEPIECE, BIOCULAR, AN/VSG-2 This specification is approved for use by USAERADCOM, Department of the Army, and is available for use by all Departmentsand Agencies of the Department of Defense.
2、1. SCOPE 1.1 This specification covers the Eyepiece, Biocular, AN/VSG-2. 2. APPLICABLE DOCUMENTS 2.1 Issues of documents. The following documents of the issue in effect on date of invitation for bids or request for proposal, form a part of this specification to the extent specified herein. SPECIFICA
3、TIONS FEDERAL NN-P-7 1 QQ-S-78 1 NNN-P-40 PPP-B-5 6 6 PPP -B- 5 8 5 PPP-B-601 PPP-B-62 1 PPP-B-636 PPP-B-640 PPP-c-795 PPP -F- 3 20 PPP - S- 7 60 PPP-T-45 PPP-T-9 7 - Pallets, Material Handling, Wood, Stringer - Strapping, Steel, and Seals - Paper, Lens - Boxes, Folding, Paperboard - Boxes, Wood, Wi
4、rebound - Boxes, Wood, Cleated-Plywood - Boxes, Wood, Nailed and Lock-Corner - Boxes, Shipping, Fiberboard - Boxes, Fiberboard, Corrugated, Triple-Wall - Cushioning Material, Flexible, Cellular, Plastic Film for Packaging Applications - Fiberboard, Corrugated and Solid, Sheet Stock (Container Grade)
5、, and Cut Shapes - Strapping, Nonmetallic (and Connectors) - Tape, Gummed, Paper, Reinforced and Plain, for Sealing and Securing - Tape, Packaging/Industrial, Filament Reinforced Construction, 2-way and 4-way (Partial) Beneficial connnents (recommendations, additions, deletions) and any pertinent da
6、ta which may be of use in improving this document should be addressed to: Hq, USA Electronics Research and Development Command, ATTN: DRDEL-E, 2800 Powder Mill Road, Adelphi, MD 20783 by using the self-addressed Standard- ization Document Improvement Proposal (DD Form 1426) appearing at the end of t
7、his document or by letter. .A FSC 5855 THIS DOCUMENT 60MTABNS fi PAGES. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-E-49383(ER) MILITARY MIL-P- 11 6 MIL-P-11268 STANDARDS MILITARY MIL-STD-105 MIL-STD-12 9 MIL-STD-147 MIL-STD-150 MIL-STD-252 M
8、IL-STD-454 MIL-STD-810 MIL-STD-1188 - Preservation-Packaging, Methods of - Parts, Materials, and Processes used in Electronic Equipment - Sampling Procedures and Tables for - Marking for Shipment and Storage - Palletized and Containerized Unit Loads, Inspection by Attributes 40 Inch x 48 Inch Pallet
9、s, Skids, Runners, or Pallet-Type Base - Photographic Lenses - Classification of Visual and Mechanical Defects for Equipment, Electronic, Wired, and Other Devices Electronic Equipment - Standard General Requirements for - Environmental Test Methods - Commercial Packaging-of Supplies and Equipment FE
10、DERAL FED-STD-595 - Colors DRAWINGS USA ELECTRONICS COMMAND DLSM-B-805103 - Eyepiece, Biocular, ANfVSG-2 (Copies of specifications, standards, drawings, and publications required by contractors in connection with specific procurement functions should be ob- tained from the procuring activity or as d
11、irected by the contracting officer.) 3. REQUIREMENTS 3.1 Item definition. The Eyepiece, Biocular, ANfVSG-2, herein known as the biocular eyepiece, magnifies the visual image at the output of the image inten- sifier and presents the scene to the eye of the viewer at the gunners or cormanders station.
12、 3.2 Construction. The biocular eyepiece shall be constructed in accordance with DLSM-B-805103 and as specified herein. 3.2.1 Weight. The total weight of the biocular eyepiece shall not exceed 10 pounds. I 2 . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from
13、IHS-,-,-MIL-E-LI7383 58 7777706 0163637 O - - 1 I i . 3.3 First article. When specified in the contract (see 6.2), the contractor shall furnish first article units for inspection. 3.4 Materials, parts, and processes. Materials, parts, and processes shall be as specified herein and as shown on the ap
14、plicable drawings. parts, and pr.ocesces not specified shall be selected by the contractor in accordance with MIL-P-11268. Materials, 3.5 Components. The biocular eyepiece shall consist of optical elements and a housing . 3.6 Performance characteristics. 3.6.1 Field of view to the eye. The field of
15、view to the eye shall not be less than 39 degrees. 3.6.2 Magnification. The on-axis magnification shall not be less than 4.5 times . 3.6.3 Exit pupil, eye relief, and field overlap. The biocular eyepiece shall have a 60-mm exit pupil and a 60-mm eye relief for an on-axis image. Eye relief is measure
16、d from the vertex of the last glass surface to a plane per- pendicular to the optical axis in which the exit pupil is located. When two 5-mm exit pupils, decentered plus and minus 27.5 m from the optical axis (55-mm center-to-center separation) are located at the 601m eye relief dis- tance, the bioc
17、ular eyepiece shall provide at least 50-percent field overlap with field overlap calculated using the diameter and not the area of the over- lapping images. These conditions shall be satisfied at the fixed diopter set- t ing . 3.6.4 Biocular focus. The eyepiece shall be focussed at -2.5, - +0.3 diop
18、ters. 3.6.5 Field flatness. The biocular eyepiece shall have a flat tangential field within plus or minus 112 diopter across the outer 50 percent of the 40-mm format and within plus or minus 1/4 diopter across the central 50 per- cent of the 40-mm format at the fixed diopter setting. 3.6.6 Resolutio
19、n. The visual axial resolution (central 25 percent of the field of view) of the biocular eyepiece shall be not less than 35.9 line pairs per millimeter (Group 5, Element 2 of a 1951 Air Force Resolution Target). remaining field of view shall resolve 17.9 line pairs per millimeter (Group 4, Element 2
20、). The 3.6.7 Transmission. The transmission of the biocular eyepiece shall be at least 85 percent over the entire aperture for the region of spectral output of a P-20 phosphor. 3.6.8 Effective focal length (EFL). The effective focal length shall be 1.733, 20,017 inches. 3.6.9 Modulation transfer fun
21、ction (MTF). With a single 5-mm exit pupil decentered plus or minus 27.51mn from the optical axis and located at a 60-mm eye relief, the MTF of the biocular eyepiece shall be at least equal to the 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL
22、-E-Ll7383 58 777770b OLb3b38 2 W 1 MTF given below. an image placed at the center of the format. conditions shall be not less than the following: This MTF shall be measured at the fixed diopter setting for Axial MTF values under these MTF Frequency (lp/m) - 2 4 6 8 10 0.97 0.94 0.91 0.85 0.78 I 3.6.
23、10 Linear distortion. The linear distortion of the biocular eyepiece measured at the fixed diopter setting shall be 5.3, - +1.0 percent barrel distor- tion at the edge of the 40-mm format. 3.6.11 Back focal distance. The back focal distance shall not exceed 0.10 inch for an object projected 400 mm b
24、ehind (towards the biocular) for the nominal 60- exit pupil. 3.6.12 Sealing. The biocular eyepiece shall be assembled in a dry nitrogen atmosphere. of withstanding temperatures down to -57 C without producing condensation. eyepiece shall then be sealed. The eyepiece shall then be gurged with nitroge
25、n that is capable The 3.6.13 Cleanliness. The biocular eyepiece shall contain no foreign matter such as dust, dirt, fingerprints, moisture, etc., that can be detected by visual examination, 3.7 Environmental conditions. 3.7.1 Temperature shock. The biocular eyepiece shall not be damaged (see 6.3) by
26、 sudden changes in temperature between -57OC to +7loC. 3.7.2 High temperature. The biocular eyepiece shall not be damaged by storage to +71“C and operation to +52OC. 3.7.3 Low temperature. The,biocular eyepiece shall not be damaged by opera- tion to -32C and storage to -57OC. 3.7.4 Shock. With the e
27、yepiece mounted in a fixture, it shall be subjected to the following shocks: a. Basic design: 40 gs, 18 milliseconds, 112 sine, 18 shocks total for operation. b. High intensity: 100 gs, 4 milliseconds, 1/2 sine, 18 shocks total for operation. c. Bench handling: The biocular eyepiece shall not be dam
28、aged by bench handling during normal activities of operation, shipping, and storage. 4 i- - . - . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-E-47383 58 m 7777706 OLb3637 4 3.7.5 Vibration. The biocular eyepiece shall not be damaged when subj
29、ected to the following random and superimposed sinusoidal levels for a period of 15 minutes in each of three mutually perpendicular axes. (Group C: 5 minutes per axis.) Random: 6 x lom3 g2/Hz, 5 to 500 Hz Sine: 1.06 gs, X axis. 1.51 gs, Y axis 1.06 gs, 2 axis Octave 1 42 to 84 Hz Octave 2 84 to 168
30、Hz 3.7.6 Altitude. The biocular eyepiece shall operate at altitudes up to 10,000 feet above sea level, sure to altitudes up to 40,000 feet above sea level. The biocular eyepiece shall operate after expo- 3.8 Treatment and painting. Unless otherwise specified, the eyepiece and its components and part
31、s shall be cleaned, treated, and painted in accordance with the applicable drawing. white, No. 17875 of FED-STD-595. The color of the biocular eyepiece shall be tank 3.9 Nameplates and product marking. Unless otherwise specified, the eye- piece, parts, components, subassemblies, and assemblies there
32、of shall be marked for identification and reference designation markings in accordance with the applicable drawing. f 3.10 Workmanship. Workmanship shall be in accordance with MIL-STD-454, Requirement 9. 4. QUALIT ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in
33、the con- tract, the contractor is responsible for the performance of all inspection requirements as specified herein. tract, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. insp
34、ections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. Except as otherwise specified in the con- The Government reserves the right to perform any of the 4.2 Classification of inspections. Inspections shal
35、l be classified as follows : a. b. c. First article inspection (see 4.3). Quality conformance inspection (see 4.5). Inspection of packaging (see 4.8). 5 I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-E-49383 58 m 9997906 0363640 O m 4.3 First
36、article inspection. Unless otherwise specified in the contract or purchase order, first article inspection shall be performed by the contractor. 4.3.1 Inspections. All materials, parts, processes, and assemblies shall be examined for conformance to the applicable specification or drawing. Inspec- ti
37、ons shall be made using MIL-STD-105, General Inspection Level II with a 2.5 percent AQL for mechanical and a 4 percent AQL for visual inspection, except as noted in table I. TABLE I. Inspect ions. I Inspection Requirement 1 Percent I Any part or component missing or damaged Weight not as specified M
38、arking not as specified Workmanship not as specified Treatment and painting not Dimensions not as specified Clean line ss as specified 2.5 2.5 2.5 2.5 2.5 i/ 2.5 100 - Requirement paragraph 3.2, 3.4 3,2.1 3.2 3.10 3.2 3.2 3.6.13 Inspect ion cri ter ia MIL-STD-252 MIL-STD-252 MIL-STD-454 MIL-STD-252
39、I I - i/ MIL-STD-105, Inspection Level S-3 or objective quality evidence. 4.3.2 Tests. Upon successful completion of inspections specified in 4.3.1, first article biocular eyepieces shall be subjected to the tests in table II. Tests shall be conducted in the order listed. Failure of any tests shall
40、con- stitute first article failure. TABLE II. First article inspection. Inspec tion Field of view to the eye Magnification Exit pupil, eye relief, and field overlap Biocular focus Field flatness Resolution Transmis s i on Effective focal length Modulation transfer function Linear distortion Back foc
41、al distance Temperature shock 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 3.6.10 3.6.11 3.7.1 Test paragraph 4.6.1 4.6.2 4.6.3 4.6.4 4.6.5 4.6.7 4.6.8 4.6.9 4.6.10 4.6.11 4.7.1 4.6.6 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without licens
42、e from IHS-,-,-k MIL-E-49383 58 m 9797706 OLb364L 2 I MIL-E-49 383 (ER) Inspec tion Requirement paragraph High temperature 3.7.2 Low tempera ture 3.7.3 Shock 3.7.4 Vibration 3.7.5 Altitude 3.7.6 TABLE II. First article inspection. - Continued Test paragraph 4.7.2 4.7.3 4.7.4 4.7.5 4.7.6 Inspect ion
43、Exit pupil, eye relief, and field overlap Biocular focus Resolution 4.4 Inspection procedures. Unless otherwise specified herein, the biocular eyepiece shall be tested at an ambient temperature of 23O, 25OC. Requirement Test paragraph paragraph 3.6.3 4.6.3 3.6.4 4.6.4 3.6.6 4.6.6 4.5 Quality conform
44、ance inspection. Inspect ion 4.5.1 Inspection. Inspection shall be as specified in 4.3.1. Requirement Test paragraph paragraph 1 4.5.2 Tests. 4.5.2.1 Group A inspection. Group A inspection shall be conducted on eye- pieces selected from units which have passed the inspection specified in 4.5.1, Grou
45、p A tests listed in table III may be performed in any order. Failure of any test shall be cause for rejection of that unit. 4.5.2.2 Group B inspection. Group B inspection shall be conducted on biocular eyepieces selected from units which have passed the tests in 4.5.2.1. Sampling of lots (see 6.2) s
46、hall be in accordance with MIL-STD-105, AQL 2.5 percent defective, inspection level S3 combined. Group B tests listed in table IV may be performed in any order. TABLE IV. Group B inspection. Tran smis s ion MTF Back focal distance 3.6.7 3.6.9 3,6.11 7 4.6.7 4.6.9 4.6.11 Provided by IHSNot for Resale
47、No reproduction or networking permitted without license from IHS-,-,-4.5.2.3 Group C inspection. Group G inspections shall be conducted on eyepieces selected from units which have passed the tests in 4.5.2.1. sample(s) shall be tested in accordance with the inspections listed in table V, listed in t
48、able V shall be performed in the order listed. The Group C tests Samples shall be selected in accordance with 4.5.2.3.1. Inspect ion i 4.5.2.3.1 Sampling for group C inspection. 4.5.2.3.1.1 Subgroup 1. For subgroup 1, three biocular eyepieces shall be selected from the first quality conformance insp
49、ection lot. group C inspection, three biocular eyepieces shall be selected every month from the monthly specified quantity (see 6.2). For subsequent 4.5.2.3.1.2 Subgroup 2. For subgroup 2, one biocular eyepiece shall be selected from every sixth quality conformance inspection lot, starting with the first lot. TABLE V. Group C inspection. Subgroup 1 Field of view to the eye Magnification Field flatness Effective focal length Linear di
