DOT MIL-L-21301 (2)-1960 LENSES BEACON LIGHT 200MM《200mm柔性焦距透镜组信标灯》.pdf

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1、,.- - . . -. . :- -! -. . . - MIL-L-2130L (2) 62 m 9979906 OL03L42 3 m - MILITARY SPECIFICATION . LENSES, BXACON LIGHT, 20OMM -. . -“ . This amendment forms a part of Military Specification MIL-L-e photorcetric and Delete third sentence and Substitute: colorimetric tests (4.6.1) and (4.6.2) shall be

2、 conducted at an independent testing facility, acceptable to the Government, at the expense of the manu- facturer . II -I -_ ! 114.6.3 -. (&enchi& - test.- Each sample lens shall withstand the internal thermal stresses produced when the lens is heated by the continuous burning -of an-electric kcande

3、scentlamp, of the bfattage shown in Table II, at the focal. point of the lens for a period of two and one-half hours, followed by thorough splashing with water cith a maxhium temperature of 40 degrees F. For this test, the lens shall be mounted in a standard Coast Guard 2001& lcin- tern and the ambi

4、ent temperature shall be not less than 65 degrees F. actual splashing may be performed by throwing the mter directly onto the the lens shall not be dmzged in any way: . ! 1 I i i I The heated lens in auantities of approximately one cup at a tirne. Under this test, -. - -1 - . : - I -. . z , _. Clzss 1 - Clear 500 watts % - - - Class 2 - Red 300 watts - Class 3 - Green 150 watts. a*. Li - . : . .: .I -. . . . .-. h . .- * “. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-