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I found this piece of equipment in my lab. Based on the age of the science lab, and the equipment it was with, I'm guessing that its from the '60s maybe? Can anyone tell me what it is and was used for?
This is perfect. Thank youhttps://www.google.com/search?q=hartl+optical+disc
http://www.ebay.com/itm/Vintage-Wel...635807?hash=item3d08805f5f:g:uFoAAOSw~bFWNr~V
http://www.parcoscientific.com/products-main/physics/optics/hartl-optical-disk
http://physics.kenyon.edu/EarlyApparatus/Optics/Optical_Disk/Optical_Disk.html
http://www.uvm.edu/~dahammon/museum/hartldisk.html
http://blog.cencophysics.com/2010/02/basic-optical-properties/
https://books.google.com/books?id=XzkYAAAAYAAJ&pg=PA436-IA12