I wanted to make a plane luminescent light. This is the same mechanism used in the backlighting of laptop computers, where a pattern is drawn on the acrylic sheet to diffuse the light, and LEDs are used to inject light from the sides of the acrylic. The light entering from the side diffuses through the pattern of the acrylic sheet and shines on a flat surface.
Drawing the pattern
In Illustrator, draw the dot pattern and outline, and save it as an SVG file.
Processing with EtcherLaserPro
Processing the light guide plate
Process 3mm transparent acrylic. The processing parameters for the pattern part are...
I did above.
Processing the diffuser plate
Let the light in
Light guide plate
As a test, I let the light in from the side of the milky white acrylic. There was no light at all, and it only got brighter near the LED.
Light guide plate + diffuser plate
I made a triple-layered structure of light guide plate, transparent acrylic, and diffusion plate, and used LED tape to inject light from the sides. The laser cutter's processing cross section is very beautiful. A saw won't get it this clean.
The whole thing lit up beautifully. The dots are so far apart that you can see a bit of the pattern, but the whole thing is glowing. It is very beautiful.
The back is transparent, so if you put your hand in the back, you can see your hand. It might be a good idea to add some white paper or something.
Planar luminescent lighting is now available
I used a laser cutter to process acrylic to make a light guide plate and a flat
light emitting light. The laser cutter is fun.