I have a small 3D printed SLA box, about 3.5" x 2.5" x 2". Here is the bottom half:

enter image description here

And the top half with an LED inside, facing down, placed off-center, about 1.75" above the "floor":

enter image description here

Here is the isoline plot of light intensity on the floor:

enter image description here

I would like to design a 3D printed diffuser, which can be placed close to the LED and reduce non-uniformity of "floor" lighting. I'm not looking for perfection, mostly to increase light intensity in the corners on the right. Any clues or references will be greatly appreciated.

Cross-posted at https://forum.image.sc/t/led-diffuser-design-software/66682

  • $\begingroup$ if diffusing light evenly is important, you may have to mold (heat and pressure as a post-processing step might work). even sla has these non-uniformities due to the growing process. $\endgroup$
    – Abel
    May 6 at 13:25
  • $\begingroup$ @Abel I intend to use SLA non-uniformity as a diffusing feature. Again, I'm striving for some improvement, not perfection. I'd rather compute a reasonable shape of the diffuser than print dozens of random designs. $\endgroup$ May 6 at 13:30
  • $\begingroup$ in that case, you can try to make it thicker closer to the LED. the additional material should help diffuse. if nothing else, it should reduce intensity in the middle. $\endgroup$
    – Abel
    May 6 at 13:34
  • $\begingroup$ @Abel That's the plan, but I'd prefer to have a computational model to play with. $\endgroup$ May 6 at 19:55
  • $\begingroup$ I'm not sure you can do this with just a diffuser. I think you will need some lensing. $\endgroup$
    – Drew
    May 8 at 4:45


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