Starting from my research discussed in 3D printed diffusors, I designed somewhat of a hybrid that aims to consolidate all positive traits of the previous diffusers and incorporate the maxims I postulated at the end of the post.
The main points of this design are:
- Compactness - the sources of light are arranged at an angle at the top and bottom behind the screen so that the circle of light is maximized.
- Alignment - the intermediate diffuser is curved so that the light on it is approximately in the correct position for the screen.
- Refraction - the light changes media 4 times before exiting the diffuser.
- Distance - the sources of light are as far as possible from the screen.
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The resulting illumination on the screen is very good compared to the trials:
But looking at the solarized version of the screen image, two problems can be identified.
- The layer times are very visible on the screen and the intermediate diffuser, causing stripes to appear.
- There is falloff on the side.
I plan to address these issues in the following ways:
- Since striping was never a problem with the diffusers in the first post where the screen was thicker than one layer, the screen and intermediate diffuser will be thickened to at least two layers.
- The sources of light will be rearranged to decrease distance from the sides.
