1、MIL-PRF-49052G I 9999906 2086627 6LL I INCH-POUND I MIL-PRF-4 90526 4 March 1999 Superseding 21 May 1992 MIL- 1-4 90 52F PERFORMANCE SPECIFICATION IMAGE INTENSIFIER ASSEMBLY, 18 MILLIMETER MICROCHANNEL WAFER, MX-9916/UV This specification is approved by the U.S. Army Communications- Electronics Comm
2、and (CECOM), 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 Image Intensifier Assembly, 18-Millimeter Microchannel Wafer, MX-9916/UV (see 6.1). 2. APPLICABLE DOCUMENTS 2.1 General. The d
3、ocuments 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 list, docume
4、nt 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. Beneficial comments (recommendations, .additions, and deletions) and any pertinent data which may be of use in improving this document should be addr
5、essed to: HQ, USA Communications-Electronics Command, ATTN: AMSEL- LC-LEO-E-EP, Fort Monmouth, NJ 07703-5023, by using the Standardization Document Improvement Proposal (DD Form 1426) or by letter. AMSC N/A FSC 5855 DISTRIBUTION STATEMENT A: Approved for public release; distribution is un1 imi ted.
6、Licensed by Information Handling ServicesMIL-PRF-49052G H 9999906 2086628 558 MIL-PRF-4 90526 SPECIFICATIONS MILITARY MIL-PRF-49065 - Night Vision Goggles, AN/PVS-5( ) STAN DARDS MIL I TARY MIL-STD-4 61 - Electromagnetic Interference Characteristics For MIL-STD-4 62 - Electromagnetic Interference Ch
7、aracteristics, Equipment, Subsystem and System Measurements Of (Unless otherwise indicated, copies of federal and military specifications, standards, and handbooks are available from the Standardization Document Order Desk, 700 Robins Avenue, Building No. 4, Section D, Philadelphia, PA 19111- 5094.
8、) 2.1.2 Other government 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 those cited in the solicitation (see 6.2.e). DRAWINGS USA COMMU
9、NICATIONS-ELECTRONICS COMMAND SM-D-657310 - Image Intensifier, Night Vision and all associated drawings SM-C-657375 - Mount Assembly, Objective Lens A31 4 4 4 8 O - Objective Lens Assembly, F/1.05 SM-C-657326 - Image Intensifier Module SM-C-657325 - Power Supply Assembly (Copies of specifications, s
10、tandards, 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 the refe
11、rences 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. 2 Licensed by Information Handling ServicesMIL-PRF-49052G = 0b 208bb2 494 I MIL-PRF-4 90526 3. REQUIREMENTS 3.
12、1 Description. The Image Intensifier Assembly, 18 Millimeter Microchannel Wafer, MX-9916/UVI referred to hereinafter as the assembly, shall have a minimum useful photocathode diameter and phosphor screen diameter of no less than 17.5 millimeters (see 3.12.20). The assembly shall employ an S-20 photo
13、cathode with extended red response. The assembly shall include the high voltage multiplier and oscillator and shall be encapsulated within a hard-surface insulating sleeve or boot and assembled into a metal housing. The assembly shall employ a microchannel electron multiplier plate with proximity fo
14、cus on the input and output, and shall contain an input fiber optic faceplate and an output fiber optic inverter as an integral part of the tube envelope. 3.2 Construction. The assembly shall be constructed to comply with the performance requirements in the contract, drawing SM-D-657310 as applicabl
15、e, and as specified herein. 3.2.1 Weight. The weight of the assembly shall not be greater than 126 grams. 3.3 First article test inspection. When specified in the contract or purchase order, the contractor shall furnish first article test (FAT) inspection assemblies in accordance with 4.2 (see 6.2.b
16、). 3.4 Parts and materials. The contractor shall select parts and materials fully capable of meeting all operational and environmental requirements specified herein. The materials specified on the applicable drawings are recommended, but not mandatory. Verification that the assembly meets the overal
17、l performance requirements shall be the governing acceptance standard. 3.4.1 Phosphor screen. The phosphor screen (see 3.12.2) shall be RCA F2126 (type number 10-52) or a government approved equivalent. 3.5 Components. 3.5.1 Power supply. The power supply (see drawing SM-C-657325) shall electrically
18、 and mechanically interface with the image intensifier module (see drawing SM-C-657326). The power supply shall produce the required operational characteristics when powered by a 2.0 to 3.0 volt direct current (Vdc) power source. 3.5.1.1 Reverse polarity. The power supply shall withstand a reverse p
19、olarity input voltage of 3.0 Vdc for at least 10 minutes. When the correct polarity of 3.0 Vdc is applied to the power supply, the tube shall function normal1 y. 3.5.2 Fiber optic faceplate/inverter. 3.5.2.1 Shear distortion. Shear distortion (see 3.12.3.1) shall not exceed 25 micrometers (pm) over
20、the display area. 3 Licensed by Information Handling ServicesIIL-PRF-49052G = 0b 208bb30 LOb e Length of chicken wire Number of allowable Number of allowable in inches incidences of chicken wire incidences of chicken in zone 1 wire in zone 2 -250 I length O O O 5 -125 I length I -249 .O90 I length I
21、 -124 O disregard .O41 I length 5 .O89 2 disregard .O20 I length I .O40 6 disregard Zone 1 - 0.295 inch diameter circle whose center is coincident with the Zone 2 - 0.295 inch to 0.710 inch annulus concentric with zone 1. disregard length I .O19 disregard optical axis of the fiber optic. 8 MIL-PRF-4
22、 9 O 52G # 3.5.2.2 Gross distortion. Gross distortion (see 3.12.3.2) shall cause no point on the image of a straight line, through any axis, to be displaced more than 530 pm relative to the best-fit straight line (see 3.12.3.3). Displacement measurements shall be rounded to the nearest whole pn. The
23、 maximum slope of the straight line image shall be less than 15 pm per millimeter (mm) across the line image and less than 25 pm per any 2 mm from the best-fit straight line. Distortion shall be measured along 4 axes which are 45 degrees apart. measurements shall be initiated from an identifiable re
24、ference point located on the fiber optic inverter. reversals. Slope reversals less than f5 pm shall not be considered as a change in slope. Distortion The line image cannot have more than two slope 3.5.2.3 Image inversion. The fiber optic inverter shall rotate a straight line image 180 degrees f 1 i
25、n a clockwise direction when viewed from the display side relative to the end points of the best-fit straight line (see Image inversion measurements shall be rounded off to the nearest tenth of a degree. 3.12.3.3). 3.5.2.4 Chicken wire. When the fiber optic inverter is viewed under 10 power (lox) ma
26、gnification perpendicular to the plano-surface with the output in contact with the phosphor faceplate, which is excited by ultraviolet light, or with the output uniformly illuminated by a lambertian source, the fiber optic inverter shall meet the chicken wire (see 3.12.4) limits specified in Table I
27、. NOTE: is transmitted through the optic and the areas in question can be observed and measured in accordance with 3.5.2.4 and Table I. The areas in question shall be inspected in such a manner that light 3.6 Operational and environmental characteristics. 3.6.1 Photocathode sensitivity. Luminous sen
28、sitivity shall be no less than 260 microamperes (PA) per lumen for radiation with a color temperature of 2856 Kelvin (K) f 50. Radiant sensitivity shall be no less than .O15 ampere per watt at 0.830 pm k 0.001. 4 Licensed by Information Handling ServicesMIL-PRF-47052G 999990b 20bb3L O42 I MIL-PRF-49
29、052G 3.6.2 Burn-in (ESSI. The assembly shall undergo 50 continuous cycles. Each cycle shall consist of 55 minutes of operating time and 5 minutes of off-time. Once during each operating cycle the photocathode shall be illuminated with 5 x foot-candle (fc) for 5 seconds and with 5 fc for 3 seconds. T
30、he remaining portion of the operating cycle shall be without photocathode illumination. The brightness gain setting shall not be changed during, or subsequent to, burn-in. 3.6.3 Vibration. The assembly, with no operating voltage applied, shall not be damaged (see 3.12.9) or suffer degradation of per
31、formance (see 3.12.22) after being subjected to simple harmonic motion parallel to and perpendicular.to the optical axis over a frequency range of 5 hertz (Hz) to 55 Hz with an amplitude of not less than 0.100 inch total excursion for a period of 10 minutes in each plane. 3.6.4 Shock. The operating
32、assembly, with no radiation incident on the photocathode, shall not be damaged (see 3.12.9) and there shall be no evidence of arcing, flashing, flickering, corona, bright spots, or other intermittent or continuous failure when subjected to 6 shock impacts parallel to the optical axis and 6 shock imp
33、acts perpendicular to the optical axis. be half sine wave with a minimum peak amplitude of 75 g (see 3.12.5) and a duration of 6 milliseconds (ms) f 2 measured at the 10 percent amplitude points. The shock impacts shall 3.6.5 Temperature (extreme). The assembly shall not be damaged (see 3.12.9) by s
34、torage, operation, or the thermal shock temperature profile specified and shall meet the following requirements at the temperature specified. Test profiles shall be as follows: a. High temperature storage: +65OC for 2 hours. b. High operating temperature: +45C for 1 hour. 1. 2. 3. 4. 5. 6. Input cur
35、rent shall not be greater than 20 mA. Gain at 2 x fc shall not be less than 3,000 and shall not be greater than 15,000. Gain at 2 x fc shall not be less than 1,500 and shall not be greater than 4,500. Output brightness fluctuation shall be tested at 2.2 Vdc and 2.7 to 3.0 Vdc at 2 x fc and 1 fc for
36、first article test (FAT). Conformance inspection testing shall be 2.0 Vdc and 1 fc only. The output brightness fluctuation shall not be greater than +lo percent from a steady state condition and drift shall not be greater than +15 percent from a steady state condition for a period of 2 minutes after
37、 an initial 2 seconds of operating time. All fluctuations shall be random after the initial 2 seconds. If random fluctuations greater than kl0 percent, but less than +15 percent, occur in the original 2 minute time period, the test shall be continued an additional 2 minutes during which the requirem
38、ents of 3.6.5 b(4) shall be met. If the output brightness drift is greater than f15 percent during the original 2 minutes time period, the test shall be continued an additional 2 minutes during which the requirements of 3.6.5 b(4) shall be met. 5 Licensed by Information Handling ServicesMIL-PRF-4905
39、2G = 979990b 208bb32 T89 II MIL-PRF-49052G 7. Rise time (see 3.12.6) shall not be greater than 7 seconds. Overshoot shall be less than 40 percent of steady state output brightness. c. Temperature shock: shock from +45OC to +23OC within 3 minutes or less. d. Low operating temperature: reduce temperat
40、ure to -5loC, hold for 1 hour. 1. Input current shall not be greater than 19 mA. 2. Gain at 2 x fc shall not be less than 7,500 and shall not be greater than 30,000. 3. Gain at 2 x fc shall not be less than 1,500 and shall not be greater than 7,500. 4. Operational stability and rise time testing. Pe
41、rform same tests as 3.6.5 b.4 through b.7 listed above. e. Low Temperature storage: maintain temperature at -51C for 2 hours. f. Temperature shock: shock from -51OC to +23OC within 3 minutes. g. After exposure of the assembly(s) to the profiles listed above, perform the following room temperature te
42、sts: 1. Gain at 2 x fc shall not be less than 7,500 and shall not be greater than 15,000. 2. Gain at 2 x fc shall not be less than 1,500 and shall not be greater than 4,500. 3. Operational stability and rise time testing. Perform same tests as 3.6.5 b.4 through b.7 listed above. 3.6.6 Equivalent bac
43、kground input (EBI). The equivalent background input at room temperature (see 3.12.7) shall not exceed 2.5 x lo- lumens per square centimeter when tested at 23OC. 3.6.7 Luminance gain. The assembly shall have a room temperature luminance gain and high light level saturation characteristics as specif
44、ied in Table II. The input current at room temperature shall not exceed 16 mA at the light level specified. 6 Licensed by Information Handling ServiceslIL-PRF-49052G 0b 2086633 915 E Nominal input light level 2 x 2 x (fC)l 1.0 20.0 c Minimum Minimum Maximum Maximum Input allowable allowable allowabl
45、e allowable Current 7,500 N/A 15,000 N /A 16 1,500 N/A 4 , 500 N /A 16 gain output (fLl2 gain output (fLI2 (mA) N /A 0.3 N /A 0.9 N /A N/A 0.3 N /A 0.9 N /A MIL-PRF-49052G Table II. Saturation requirements for luminance gain. 3.6.8 Halo. The halo (see 3.12.8) produced by projecting a spot of light o
46、nto the input o the assembly shall be no greater than 1.37 millimeters (mm) in diameter. 3.6.9 Bright source protection. The assembly shall not be damaged (see 3.12.9) when subjected to an input illumination of not less than 50 millilumens concentrated on the photocathode within an area not greater
47、than 1 mm2 for a time interval of not less than 1 minute. Additionally, the assembly shall have luminance gain saturation characteristics throughout the applied illumination period such that the light output is not greater than 3 millilumens or not less than 0.37 millilumen. This requirement shall b
48、e met within 1 second after the input illumination is applied. There shall be no discernible damage after a non- operating period of not more than 24 hours. 3.6.10 Signal-to-noise ratio. The signal-to-noise ratio of the assembly shall not be less than 4.5. 3.6.11 Fixed pattern noise. 3.6.11.1 Multi-
49、to-multi pattern variation (see 3.12.10). Multi-to-multi brightness deviations from the mean value shall not exceed 110 percent. 3.6.11.2 Multi-boundary pattern noise (see 3-12-11). The average value of the brightness deviations of the multi-boundary intensities shall not deviate from the mean value of the adjacent multi intensities by more than t10 percent. The mean value shall be established from the three adjacent multies containing the above multi-boundaries. 3.6.12 Output brightness uniformity. When the photocathode is uniformly illuminated with light at a color temp
