Hello all! My Grandpa's birthday is coming up and he has just come across a big box of his old slides and wants to digitize them, but he keeps talking about some thing his dad used to have that was kind of like the fluorescent light boards that doctors use to put xrays on but you can line the slides up on it and see which ones have a good picture and which ones don't. I'm sure that these days there is a more modern way of doing this, but he is determined to use the old school way and I want to help him, but the only problem is I have no idea what they are called and I have searched all over the internet! If anyone know what I'm talking about please let me know Thank You!!