1、 - MIL-P-4b337B (I) 32 m 7799706 0333332 3 PL MIL-P-46337B (MU) Amendment 1 10 October 1972 MILITARY SPECIFICATION PERISCOPE TANK: M35 This amendment forms a part of Military Specification MIL-P-46337B (MU) dated 31, January 1972 . Delete 1WIL-B-1484311 wherever it appears in the specification and s
2、ubstitute “MIL-B-50762“ Delete 11105419501 wherever it appears in the specification and substitute “11743800“ Paragraph 201, Drawings: Delete 11F857599511 and F8575996“ with their corresponding title. Paragraph 4.6.1: Delete and substitute: “4.6.1 Ppe-vibration collimation, infrared reticle Settings
3、- This test and the following tests of 4.6.1.1, 4.6.2.1.1 and 4.6.2.1.2 shall be performed with the periscope positioned and adjusted as in 406.4. disengage the index pin ttD1l from the index plate of the test fixture and place the 10 second level on surface irC1i of the leveling base. The bubble of
4、 the level shall be centered within its graduation lines. If it is not, then adjustment is required in accordance with the procedures prescribed in paragraphs 7 and 8 of the Set-up instructions contained on Drawing F8247391. With the index pin “D“ disengage from the index plate and surface “CV1 of t
5、he leveling base level, view through the periscope eyepiece (infrared) and obtain coincidence of the periscope reticle boresight cross and the projected target image crosslines, by means of the infrared boresight knobs (do not slip knob scales). coincidence has been obtained, record the boresight kn
6、ob scale settings for use in the test in 4.6.2.1.1. Prior to performing these tests, When Without distrubing the knob scale settings, the periscope shall be then subjected to the test in 4.6.1.1.11 Paragraph 4.6.2.1: Delete 1t4.6.411 and substitute if4.6.111. Paragraph 4.6.4: Delete and substitute:
7、“4.6.4 Performance.- To determine compliance with 3.6, the following tests shall be performed with the complete periscope positioned on the special test equipment specified in 4.5.2.3.1. Set-up of the test equip- ment and installation of the periscope under test shall be performed in accordance with
8、 the Set-up and calibration inEtructions contained on Drawing F8247391. A target projector collimator having a clear aperture of at least 2.0 inches and containing an appropriate calibrated horizontal and 1 FSC 1240 Provided by IHSNot for ResaleNo reproduction or networking permitted without license
9、 from IHS-,-,- MIL-P-LIb337B (3) 12 W 7779706 0333333 3 - MIL-P-46337B (MU) Amendment 1 verticle reticle crossline target test pattern shall be utilized with the specialized test equipment specified herein. Qhe vertical reticle target line shall be aligned plumb when in the test position in a qualif
10、ied level surface and the target projector collimator shall be adjusted for infinity. projector collimator shall be positioned at thc rear of the daylight body of the periscope so that its optical axis is in a-.ignment with the line of sight (geometric center) of Lens 8289292. The opticiil axis of t
11、he target projector collimator shall be aligned parallel with resp1:ct to Datum Plane Icyt and autocollimated within 10 seconds to Datum Plan Wt. during these tests, the Infrared Focusing Ring 8620059 shall be adjusted for best focus of the target image after the diopter adjustment knob of the infra
12、red eyepiece is set for best focus of the phospher grain on the screen of the image tube; Eccentric 10516549 (for adjusting parallix) shall be adjusted for minimum parallax between the target image and reticle ind then locked after the diopter adjustment knob of the daylight eyepiece is se: for best
13、 focus of the projected infinity target; the clear filter shall be positioned in the field of view and the Collimator Projector 10547434 shall be adjusted for 1200 meters. The target Unless otherwise specified Custodian: Pre iaring Activity: Army - Mu . Amy - MLl Pro ject No 1240-A403 Page 2 of 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
