DLA MIL-PRF-1 1583 C-2012 ELECTRON TUBE IMAGE CONVERTER TYPE 6929.pdf

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1、 MIL-PRF-1/1583C 19 January 2012 SUPERSEDING MIL-PRF-1/1583B 26 July 1999 PERFORMANCE SPECIFICATION SHEET ELECTRON TUBE, IMAGE CONVERTER TYPE 6929 This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring the electron tube des

2、cribed herein shall consist of this document and the latest issue of MIL-PRF-1. DESCRIPTION: Infrared sensitive (S1 photocathode surface; P20 phosphor image screen). ABSOLUTE RATINGS: Parameter: Unit: Eb V dc Light flux lumen ib 2/ A dc Ib A dc Rb Meg TA C Alt ft Maximum: Minimum: 12,000 - - - 2.0 -

3、 0.20 - - - 68 -54 10,000 - Test condition: 12,000 1/ - - 100 20 to 23 - See the footnotes at the end of table I. GENERAL: Qualification Not required. Stabilization: 3/ Holding period: 4/ This specification sheet uses accept on zero defect sampling in accordance with MIL-PRF-1, table III. AMSC N/A F

4、SC 5960 INCH-POUND Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1583C 2 TABLE I. Testing and inspection. Method Acceptance Limits Inspection MIL-STD-1311 Conditions level Symbol Min Max Unit Conformance inspection, part 1 Shock - 5/ 9/ -

5、 - - - - Irradiation surge - 6/ - - - - - Conversion index - 7/ - CI 10 - - Conversion index decay - 4/ 21/ - - - - - Conversion index to background - 8/ 21/ - CI/B 3.0 - - Alignment and image shift - 9/ - - - - - Center resolution - 10/ - Res 50 - 1-p/mm Peripheral resolution - 10/ - Res 12 - 1-p/m

6、m Center magnification - 11/ - Cmx 0.714 0.758 - Distortion - 12/ - - 6 10 % Cathode and screen spots - 13/ 21/ - - - - - Breakdown - 14/ 21/ - - - - - Dark current - Light flux = 0 15/ 21/ - Llk - 0.02 A Conformance inspection, part 2 Cathode and screen uniformity - 16/ 2.5 - - - - Vibration (1) (c

7、athode-ray tubes) 5111 9/ 17/ 20/ 1.0 - - - - Vibration (2) (cathode-ray tubes) 5111 9/ 18/ 20/ 2.5 - - - - Temperature cycling and thermal shock - 9/ 19/ 20/ 1.0 - - - - Permanence of marking 1105 - - - - - 1/ Unless otherwise specified, the radiation source shall be a tungsten filament lamp operat

8、ed at a color temperature of 2,854K. A Corning No. 2540 filter (melt No. 1613, of .103 inch (2.61 mm) thickness), or equivalent, shall be placed between the radiation source and the photocathode. The quantity of radiation from the source incident on the photocathode for the individual tests shall be

9、 the amount stated in the note describing the particular test. 2/ The period of time of ib for any single period shall not exceed 2 minutes, and the tube shall not be subjected to more than 10 such periods during its life. Provided by IHSNot for ResaleNo reproduction or networking permitted without

10、license from IHS-,-,-MIL-PRF-1/1583C 3 TABLE I. Testing and inspection - Continued. 3/ The tube shall be held for a manufacturers stabilizing period of at least 2 weeks. Prior to this period, the temperature, vibration, and shock tests shall be made; at the end of the two-week period, the irradiatio

11、n surge and initial conversion index tests shall be made in the order listed. (See 4/). 4/ After a holding period of 672 hours, which shall not include the manufacturers stabilizing period of at least 336 hours, the conversion index of the tube shall be not less than 10, and shall not have slumped m

12、ore than 20 percent from the initial value measured at the end of the stabilizing period. If the conversion index has slumped more than 20 percent, but still is above the minimum value of 10, the tube shall be held an additional 2 weeks. At the end of the 6-week period, the tube shall have a convers

13、ion index of not less than 10 and shall not have slumped more than 30 percent of the initial value. 5/ Upon completion of the vibration (1) test, specified herein, each tube, in a proper holder, shall be energized with 12,000 volts for a stabilization period of 15 seconds in a darkened room (not mor

14、e than 0.01 footcandle). At the end of this period, with the tube still energized and no incident light on the photocathode, it shall be subjected to shock impacts in the following manner: The shock impacts shall be applied in a way to generate nominal half-sine wave pulses having a minimum of 75 Gs

15、 at the peak. The duration of each shock pulse shall be 6 2 milliseconds measured between the 10 percent values of the peak amplitude. The energy under the shock curve shall be not less than 0.25 G second and the after oscillations shall be not greater than 15 percent of the peak amplitude of the no

16、minal half-sine wave pulse. The tube shall be subjected to six shock pulses parallel to, and six shock pulses perpendicular to, its longitudinal axis. Presence of flashing or electrical bursting during more than two shocks in each direction shall be cause for rejection. 6/ The image tube shall be su

17、bjected to an irradiation surge by exposing the photocathode to radiation from a tungsten light source (which need not be the one specified in 1/) for a period of at least 5.0 seconds to produce a minimum of 2.0 A of photocathode current. The image of the source on the screen of the tube shall not d

18、isintegrate nor shall any part of the image darken or be blanked out during the irradiation surge. 7/ The radiation source, specified in 1/, shall be used to produce a circular image .500 inch (12.70 mm) in diameter on the center of the photocathode. The amount of incident flux on the photocathode (

19、prior to interposing the filter) shall be 0.0100 0.0005 lumen. The light output of the tube shall be read with a Weston Model 856 RRV photronic cell, or equivalent, provided with a Viscor filter and truncated lucite cone. The cone shall be 1.562 inches (39.67 mm) in diameter at its base, 1.125 inche

20、s (28.58 mm) in diameter at its top, and 1.6875 inches (42.86 mm) in height. The base of the cone shall be cemented to the photronic cell window. The cone top shall be in contact with the image screen of the tube. The photronic cell and cone shall be precalibrated from a diffused light source. The s

21、mall end of the cone shall be placed to cover the excited area of the image screen. The conversion index is defined as: TFFCI21=F1 is the total available luminous flux emitted by the phosphor screen of the tube at the operating voltage specified herein. F2 is the unfiltered flux from the 2,854K ligh

22、t source incident on the photocathode of the tube. T is the filter factor of a calibrated Corning No. 2540 (melt number 1613, .103 inch (2.61 mm) thickness) infrared filter, or equivalent, interposed between the light source and photocathode. This filter factor is the percentage of 2,854K hololumen

23、flux transmitted by the infrared filter and is determined by the following: Where R = The relative spectral response of an EIA S-1 photosurface. J = The relative spectral distribution of the 2,854K color temperature radiation source. t = The spectral transmission of the infrared filter. d = The diff

24、erential of . = The wavelength of the radiation. TR J t dR J d= Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1583C 4 TABLE I. Testing and inspection - Continued. 8/ The radiation source and filter specified in 1/ shall be used. The sourc

25、e shall be adjusted to produce a .500 inch (12.70 mm) diameter circle image on the center of the photocathode. The amount of radiation incident on the photocathode (prior to interposing the filter) shall be 0.0100 0.0005 lumen. The 5819 or 1P21 photomultiplier tube, or equivalent, shall be placed wi

26、th its cathode against the screen faceplate of the image tube. The bleeder voltage of the photomultiplier shall be adjusted to give 370 microamperes of anode current (based on an effective screen background area of 3.14 cm2). The radiation from the source shall then be excluded from the photocathode

27、 and the brightness shall be read in terms of anode current (LB), of the photomultiplier tube. The ratio of conversion index to background LBBCI 00.1= 9/ After completion of the vibration, shock, and temperature tests (when required), specified herein, the resolution pattern described on figure 2 sh

28、all be focused on the photocathode and the image of the pattern observed on the screen of the tube with a 10-power microscope. The microscope shall be aligned with the geometric axis of the tube (which shall be the center line of the 1.210 inch (30.73 mm) diameters at each end of the tube as shown o

29、n figure 1) and it shall be focused for best resolution of the test pattern image. With the microscope focused and aligned with the tube operating at normal voltage, a test spot shall then be projected on the center (tube axis) of the photocathode and the image of the spot shall be observed on the s

30、creen. The center of the test spot image shall fall on the screen within a 0.045 inch (1.14 mm) radius circle concentric with the tube axis. Following the alignment test, the position of the center of this image shall be recorded. After application of electrical shock, resulting from 10 cycles of al

31、ternate periods of 15 seconds with and 10 seconds without application of the rated tube voltage, the center of the above image shall not be displaced more than 0.0025 inch (0.06 mm) in any direction from its initially recorded position. 10/ This test shall be performed with a 10 power or greater mic

32、roscopic monocular; a tungsten radiation source and infrared filter (which need not be the source and filter specified in 1/), a resolution test pattern (see 2/), and a projection lens needed to project the resolution test pattern upon the image tubes photocathode. The test pattern shall be placed b

33、etween the radiation source and the filter and shall be focused on the photocathode for best equal resolution of line sets in the central area of the image tube screen. The input radiation level shall be adjusted by the operator to obtain best contrast of the resolution patterns. The image shall be

34、considered resolved when all lines in each resolution group can be counted. The resolution test pattern shown on figure 2 shall consist of 3 groups (marked 12, 50, and 12) of lines. The center resolution group marked 50 shall have 5 sets of lines with each set having 8 black lines with a minimum len

35、gth to width ratio of 15 to 1. The peripheral groups, marked 12, shall have 2 sets of lines with each set having 5 black lines with a minimum length to width ratio of 5 to 1. The width of each black line and the distance between the black lines in the group marked 50 shall be 0.01 mm. The width of e

36、ach black line and the distance between the black lines in the two groups marked 12 shall be 0.04 mm. The arrangement and orientation of the groups and the sets of lines in each group shall be shown on figure 2. The resolution test pattern shall be projected 1:1 on the photocathode of the tube. (Pro

37、jection other than 1:1 may be used provided the chart size is such that the projected image on the photocathode meets the above specifications.) 11/ Magnification is defined as the ratio of the separation of the two image points to the separation of corresponding object points; the latter being loca

38、ted on a diameter and equidistant from the tube axis. Paraxial magnification is obtained only if the object points are very close to the tube axis. Center magnification (Cmx) is a close approximation to paraxial magnification and shall be measured with a nominal chordal separation of object points o

39、f 20 0.4 percent of the useful minimum cathode diameter. The object points shall be projected on the photocathode with nominal monochromatic visible light. 12/ A second magnification measurement shall be made to determine the percentage of distortion. The procedure used to determine the center magni

40、fication (see 11/) shall be used except for the spacing of the points or lines on the photocathode which shall have a separation of 80 0.4 percent of the useful minimum cathode diameter. Percentage distortion shall be determined by the following formula: 100112XMMMD=Where: D = Percentage distortion.

41、 M1 = Magnification obtained in center magnification test. M2 = Second magnification determined as above. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1583C 5 TABLE I. Testing and inspection - Continued. 13/ The Universal Standard Image

42、Tube Tester Assembly F8584978, or equivalent, shall be utilized for this test. When the tube screen is observed with a 2.5 power magnifier and with no radiation incident on the photocathode, there shall be no ion spots or cold emission that appear as bright streaks or blemishes. When the screen is v

43、iewed through a 10-power microscope and with the radiation level on the photocathode adjusted to obtain best spot contrast, the opaque or dark spots shall not exceed the size and quantities specified below: Size of spots 1/ (Inches) Number of spots within .300 inch (7.62 mm) diameter circle 2/ Numbe

44、r of spots, within area bounded by two circles .300 inch (7.62 mm) and .570 inch (14.48 mm) in diameter 2/ Greater than .012 (0.30 mm) .009 to 0.012 (0.22 to 0.30 mm) .006 to 0.012 (0.15 to 0.30 mm) .002 to 0.012 (0.05 to 0.30 mm) 0 0 0 0 0 2 12 32 1/ If the distance between two spots is less than t

45、he maximum dimension of either spot, they shall be considered as one spot with a size equal to the sum of the maximum dimensions of the two spots plus the amount of separation between them. 2/ The .300 inch (7.62 mm) and .570 inch (14.48 mm) circles on the image screen shall be concentric with the t

46、ube axis. 14/ Apply 13 kilovolts for 10 seconds. The tube shall be rejected for intermittent or continuous arcing, flashing, or flickering. 15/ To measure total tube dark current LIk, a microammeter shall be connected in series with the grounding terminal of the tube. This test shall be performed in

47、 an atmospheric environment of 40 to 50 percent relative humidity. 16/ The background shading shall be uniformly graded so that there is no line of demarcation between light and dark areas. Two tests shall be performed. a. With no radiation incident on the photocathode. b. With the radiation uniform

48、ly distributed over the photocathode produced by filtering through Corning filter No. 2540, or equivalent, 0.1 to 0.4 lumens/square foot from a tungsten source operating at a color temperature of 2,854K. 17/ The tubes shall be rigidly mounted, singly or in groups, in a vertical position with the cathode end up, and subjected to a simple harmonic motion applied along the longitudinal axis of the tube or tubes have an amplitude of .0625 inch .0025 (1.59 0.06 mm) (.125 .005 inch (3.1