1、MILITARY SPECIFICATI(X4 LENS cm, AERIBL CUERA, TYPE c-7, 12 INCH F/6.3, 9 X 18 INCH FORMAT 1, SCOPE 1.1 This specification covers one type of 12-inch f/6.3, 9 x 18 inch format, aircraft reconnaissance camera lens cone, utilizing an intra-lens shutter and diaphragm, designated Qpe c-70 use with the T
2、ype D-3 camera body, and is a component of the KA=l( ) camra, 2, The lens cone is intended for PPL1CUW SPECIFICAnONS, STANDARDS, AND DRBWINGS 2.1 The foilaKing specifications, standards, anci drawings of the issue in effect on the dab sf invitation for bids, form a part of this specifi- cation to -t
3、he exbent speoified hemint MILITARY liIGL7 2 3 6 MIL-A-7653 ldIL.c-8492 Lens, Camera, Aerial Reconnaissance and Spotting, 12 inch FJ6.3, 9 x 18 inch Formt Amplifier, Electronic Control, Servo Motor, Universal Camera Control System, Type E4 Canera, Still Bcture, Aircraft Reoonnaissance, Type U-l( 1 M
4、IL=B-8493 Body, Still Piaturn, Aircraft ReonndSSane Camera, pype D-3 AIR FORCE-NAVY mlAUTIcAr, . AN-F-40 Film; Aerial Photograpic* 11sm-129 Marking of Shipments mTD-10 Photographic Lenses DRMINGS U. S, AIR FORCE 52D17885 53uL-7989 %dy, Still Picture, Aircraft Reconnaissance Lens Cone, Aerial haera,
5、Type C-7, 12 Inch Camera, Type D-3, Outline of ff6.3, 9 x i8 Inch Formt, Outline of P Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-2- MIL-L-9031 (WAF) (Copea of specifications, standards, and drawings required by contractars in connection #ith spe
6、cific procurement functions should be obtained from the Frocuring Agency or as directed by the contracting officer,) 3. REGWIrnEN1s are applicable as requirements of this specification, Additional requim- menta shall be as specified herein. When the requirements of SpecFfication MIL-E8492 and those
7、of this specification conflict, the requirements of this specifioalxion shall govern. 3.1 enera1,- The requirements specified in Specification hULC-8492 3.2 Component parts and accessories.- The lens cone shall consist of the following parts and accessories: Une Cone Clne One Diaphragm rod he Dust c
8、over one Miter (yelop) One alter (red) n Nose assembly, lens cone Lens, 12 inch f/6.3 with caps 3.3 Design: 3.3.1 Mating surfaces.- The camera body mating surface of the lens cone shall. be such as to mate with the Type P.3 camera body conforming to Speci- fication MIL-B-8493 and shall be as shown o
9、n Drawing No. 53D17989. 3.3.2 OpUcril requirements.- All apparatus and components affecting the transmission of light to the sensitized emulsion shall conform- to the follow- ing requirements , 3.3.2.3. Lenses,- Provision shall be made for use of a 12 inch foca length, f/6,3 lens conforming to SpecF
10、fication MILL-7236, fixed at infinity focus. 3.3.2.2 Focusing means.- A focusing ring shall be employed to position 3.3,2.3 Resolving power.- The effective resolving pmer, as determined -CI the lens assembly in the cone. with the lens mounted in the camera shd.1 conform to the resolving pmer test re
11、quirements of Section 4. 3.3.2.4 Filter,- Each lens cone shall be provided with two filter units as supplied with each lens in accordance with Specification m-L-7236. 3.3.3 Shutter.- The shutter shall be of the intra lens high efficiency type. Readily selectable operating speeds of 1/400, 1/90, 1/20
12、0, 1/100, 1/50 and 1/25 second shall be provided. The speed shall be defjned as the total aGha1 time open, or the time from the beginning of the opening period to- the end of the closing period. When the shutter is supplied with 28 volts dc pulses for opening (I1A1l pulse) and closing ( l1Bl1 pulse)
13、 spaced apart by the vdu3s_ofpTable - - 5, the shutter total open time shall be the values given - p- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-L-7032 67 77777Ob OLLiSL3 b r -3- MIL-L-9031 (USAF) b a b Table I within 5 Spercent at 80“ i 20F
14、. from this originally measured speed at 80F by more than 10 percent over the range of tempe rritures and conditions specified under “Environmental and durability tests.11 Shutter speed shall not vary TABLE I fie Interval Between IRAn and IiBt1 Pulses 1 Shutter Speed I 1.4 milliseconds 1/400 second
15、2.2 11 1/300 It 3.9 8.9 18.9 Il 1/200 II 1/100 I II 1/50 It 38.9 Il 1/25 It A 3.3.3.1 Shutter release.- Means shall be provided to fix the shuttsr in a full open position for purposes of focusing or calibration without removal, separation, or disturbance of any part or parts which contribute to the
16、alignment of the optical system, except that removal of the magazine shsll be permissible. spring tension for camera storage. bans shall be provided for rebasing ihe shutter 3.3.4 Iris diaphragm.- The lens cone sMl be- provided with a properly located iz5.s diaphragm readily operable by the bris dia
17、phragm manual control on the Type D-3 body and also by the diaphragn servo unit specified herein. The diaphragm shall aperate omr the entire range from f/22 to full open. be mechanically connected to a servo assembly which shal contain a two phase induction motor, Transicoil Type 4900-20 or Kernfoot
18、 Motor Mark 14 Model Q or equal. The servo shall also contain a gear ratio such that with the motor full excited as shown- on Figum 1, the diaphragm shall move from the minimum aperture to the rated maximum aperture of each lens cone in not less than 1.5 seconds or more than 2.5 seconds at 80F f 20F
19、. 3.3.4.1 Iris diaphragm servo assembly.- The lens cone diaphragn shall 3.3.4.2 A potentiometer shall also be provided and coupled to the semo motor and mechanism in such a manner that, when the potentiometer is mnected and excited as shown in Fgure 2 and the eqosure transducer output voltage is set
20、 by turning the manual cmtrol output connection,. the corresponding diaphragm apertrre diameter shall have the value shown in Table II witm 55 percent at an m.bient temperature of 80 k 20F and witkdni3.0 percent throughout the temperature range of OOF to 160F. TABLE II F Stop 6.3 8 i1 .all 16 .O45 .
21、559 22 .O24 .405 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- -tn Hgure 3 (the exposure transducer schematic). 3.3,h.k Suklable limit stops shall be provided on the diaphrap mechanism to limit the travel of its mechnism to the proFr extent. 3.35
22、Electrical connections.- The lens cone shsll obtain 28 volts dc, 115 Volts ac 400 cycle and the shutter tripping pulses by internal connection to the Type D-3 camera body. body, shall be mounted by means of the four tapped mounting holes on the body, as shown on Drawing No. 52D17885. The mitch circu
23、its shall be as shown 3.3.6 iliounting provisions,- The lens cone attached to a Type D-3 canera G e 3.3.7 Lens cape.- Removable lens caps for front and rear cells shall Oe provided, as supplied 5th the lens in accordance with Specification IdiL-L-7236, for protectlon during storage and shipment 3.4
24、Power conswnption,- The power consumption of the lens cone shall not exceed 4 va measured at 115 volts ac, b00 cycle regulated, and 75 watts measured at 28 Wits dc. 3.5 Mmen8iom.- The outline dimensions of the lens cone shall. conform to Drawing No. 53D17989, 3.6 Weight,- The weight of the lens cone
25、 shall not exceed 30 pounds, 3.7 IdentificaLion of product.- The idsntiflcation data applied to the Lens cone shall be as foll.awst Lens Cone, Aerial Camera, 12 Inch f/6.3, 9 x 18 inch Formt Type c-7 28 volts DC AIDS 115 Volts ACwCycZe VA SiJeoificatiLon MILL-903- U, S, Property 3.8 Guvernmerrt loan
26、ed property,- When provided for in the contract or purchase order, the following items will be furnished by the Govenunent to the contractor upon his request, The equipment furnishsd shall be used only as a guiern stmkor Speo or No, Part No. Nomenolature hg NO, Quantity /-+ 1 . Y- 1 BOW, Still Pictu
27、re, Aircraft MxLB-8493 - Inhen provided for in the contract or purohaae order, the follng*e the serial number and focal length of the lens, serial number of the camera, and the exposure used. The mgative shall be retained by the maufasturer as a record, filter with Iype IA or IB Class L film conform
28、ing to Specification AN-F-40, with lens set at full aperture and with the shutter set at the l/lOO second speed shall. be set up in front of a collbuator with the optic axes of the camera and collimator approximately coincident. The aperture of the colli- mator lens or paraboloidal mirror shall be g
29、reater than the aperture of the lens in the cone being tested and the focal Length of the collimator shaU be at least four times that of the focal length of the lens in the camera being tested. The test target shdl be accurately placed in the foca. plane of the collimator and illuminated with white
30、Ught. One exposure of this collimated test object shall be made at the center of the negative area and The negative shall be marked to The completely assenbled camera with yellm - - _- *_ Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-L-7031 67
31、8a 7777706 03LI8517 7 I -9- MIL-L-9031 (WAF) one shall be made at a radial angle of 35 degrees. developed in a developer such as IL19 or equal to a gama of 1.3 i 0.15, fixed, washed, dried, and then studied to detemine the resolving paver in lines per millimeter resolved. suitable magnification to d
32、etennine the limit of resolution in lines per millimeter resolved on the smallest resolved pattern on each target image. Th mi* resolving power shall be no less than 79 percent (2 pattenis on manufacturer . The negative shall be The negative images shall be examined under a fitarget) 8 of the resolv
33、ing parer of each lens as supplied by the lens 4.3.1 Parallelism tests.- The rear cell mating surface of the shutter Suitable optical or mechanical mans shall be employed to masure housing whn installed in the lens cone shall be tested for parallelism with the focal plam of the actual camera or me s
34、imulated by a suitable fixture. the parallelism. “his test is made without the rear lens cell installed in the shutter housing. of the camera shall be parallel within 3 minutes of arc. shall be filed with reaolution tests an the same lens. The rear cell mating surface and the focal plane The test re
35、sults 4.4 Durability.- Each sample item, expt the diaphragm servo, shall be operated at 80“ f 20 F for 12,000 cycle8 using 28 volt dc tripping pulses from .the shutter speed timer in the caniera body and with a 28 volt dc power supply in accordance with the following procedum. (1) (2) The item shd1
36、be cycled at 3 second intervals. A total of two malfunctions shall be permitted during this test. A malfunction shall be interpreted as a condition resulting fran damage or wear of a part or parts which require repair or adjustment of the item being tested to return it to proper operating condition.
37、 (3) The test shall be conducted at the highest shitter speed setting. (4) Shutter speed shall be measured at the beginning of the test and at the completion of each 30 cycles-.using puises as determined by Table I. (5) A change of shutter speed fran that originally measured at tiie start of the tes
38、t in exoess of 10 percent shall constitute cause for rejection. 4.4.1 Diaphragm servo durability.- A diaphragm sem assembly consisting of the servo motor, gearing, potentiometer and switches, as described in preceding paragraphs, shall be capable of continuous cycling from maximum aperture to minimu
39、m aperture and =turn for a dm total time of X)O hours at a rate of 15 complete cycles per minute and at an ambient temperature of 80“ It 20F. 4.5 Law temperature test(equipment operating) .- Then the lens cone temperature has been stabilized as specified in Specification MIL-C-8492, the shutter shal
40、l oprate at its highest speed setting for 100 cycles at 2 second intervals and the diaphagm servo shall operate from maximum aperture to minimum aperture and return at a rate of 10 or more complete cycles per minute. Failure of any part of the shutter mechanism or decrease of shutter speed in excess
41、 of 10 percent of the original speed during the test shall eonstitte .* I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-10- NIL-L9031 (USAI?) cause for rejection, in speed in excess of 10 percent, as described above, shall ccnstitute cause for rej
42、eotion, 5, PT(EPARAT1ON FOR DELIWRY requirments of Specification MJLC-8492, ance with Standard MILSTILl29, Failure of the diaphragm servo mechanism or decrease 5.3, Cisneiral,- Preparation for delivery shall be in accordance with the 5.2 Marking of shipmnts,- Each carrying case shall be niarked in a
43、ccord- The nomenclature shall be as follows: Lens Cone, Aerial. Camera, i2 Inch Iype E7 Specifi cation MILL-903 Urs Part No, * # Applicable data to be entered by the amtractor. f/6.3, 9 x 18 Inch Formt in addition, the following marking information fill be included: IF ZN STORAGE AFTER (DATE) (1) TH
44、E LEUS CONE SHALL BE TESTED AND INSPECTED BEFRE ISSJE, (1) This date shall be 12 mmths from date of inspectd.on, 6, NOTES 6,l Ordering data.- Procuremnt documents should specify the follafflng: a, b, Stock number, c, Title, number, and date of this specification. Provision for Qooement Loaned and Fu
45、rnished Property as specified in Section 3. NOTICE: When Government drawings, specifications, or other data are used for any purpose other than in connecticai with a definitely related Government procurement operation, the United States Government tbreby incurs no responsibility nor any obligation w
46、hatsoever; arad the fact that the Government may have formulated, furnished, or in any way supplied the sad drawings, specif;lcations, or other data, is not to be regarded by ?ImplicaCion or othelwise as in any manner licensing the holder or any other person or corporation, or conveying any rii ! it ab i 0 1 i I i j j i ! i i i ! ! i I I l 1 f I i i i f i i ! i i I f i i i Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
