Smilodon has found a great use of some LEDs!. To make the Etched Door LED lighting effect, the light travels from the edges of the glass and is not seen until it hits the etched portion. Using two LED colors really makes the end result pop!
"I also used a 4 layer glass. Two outer layers of 3mm float glass and two inner layers of 3mm plexi glass where the image were engraved. I had to use plexiglass as it conducts light way better than normal glass. The sheets are engraved on the opposite sides of each other. In a perfect world i could have engraved the same side of each sheet. however, if i did that the images would look great if they were looked at from straight in front. But if you look at them slightly from the side the images wouldn’t match. (the images would be 3mm apart from each other.) To encounter this the engraved sides are facing each other. The problem is that one image will look a little bit clearer from one side. This turned out to be way less of a problem than i first thought."
Source: http://hackedgadgets.com/2008/02/10/etched-door-lit-by-leds/
"I also used a 4 layer glass. Two outer layers of 3mm float glass and two inner layers of 3mm plexi glass where the image were engraved. I had to use plexiglass as it conducts light way better than normal glass. The sheets are engraved on the opposite sides of each other. In a perfect world i could have engraved the same side of each sheet. however, if i did that the images would look great if they were looked at from straight in front. But if you look at them slightly from the side the images wouldn’t match. (the images would be 3mm apart from each other.) To encounter this the engraved sides are facing each other. The problem is that one image will look a little bit clearer from one side. This turned out to be way less of a problem than i first thought."
Source: http://hackedgadgets.com/2008/02/10/etched-door-lit-by-leds/
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