Talk:Light curtain

Source?
This article appears to have been copied from http://www.elevator-part.com/lightcurtain.html, http://industrialrepairgroup.com/site-map/light-curtain/ (which indicates CC-SA license, not acknowledged here in the Wikipedia article) and various other places. Rwintle (talk) 14:32, 28 April 2011 (UTC)

So.....
what's the difference vis-a-vis the "traditional" photoelectric barrier - sounds like the same thing under a foreign name, to me! Maelli (talk) 16:02, 22 March 2012 (UTC)

Typically a photoelectric barrier is a single beam whereas safety light curtains are series of parallel, usually horizontal beams. When properly designed this will make it impossible for the operator to reach around the safety light curtain. Stogiesaurus (talk) 20:07, 18 June 2015 (UTC)