I did a quick search in my archive and there are a couple of relevant pictures of the lens shape and a mold there may be more when I get around to doing more scanning http://www.collection.archivist.info/searchv13.php?searchstr=ps+lamp Dave
On Thu, Apr 18, 2013 at 8:48 AM, Gregg Eshelman <g_ala...@yahoo.com> wrote: > How are molds for plastic reflectors machined? They have a large number of > sharp edged corner cubes. > > Could be done with EDM, but how would the EDM electrode be machined? All > those small facets have to be polished for the reflector to reflect light. > > Plastic reflectors have been made like this as far back as 1952. Before > that there were ones with larger corner cube patterns molded in glass. > > > ------------------------------------------------------------------------------ > Precog is a next-generation analytics platform capable of advanced > analytics on semi-structured data. The platform includes APIs for building > apps and a phenomenal toolset for data science. Developers can use > our toolset for easy data analysis & visualization. Get a free account! > http://www2.precog.com/precogplatform/slashdotnewsletter > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis & visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
