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# 3D printed diffusers pt.2
- URL: https://cronoxyd.de/3d-printed-diffusors-pt-2/
- Published: 2022-03-27T18:59:36.000Z
- Updated: 2026-08-01T15:03:04.000Z
- Author: Marcel Diskowski
- Tags: 3D printing

Starting from my research discussed in [3D printed diffusors](https://cronoxyd.de/3d-printed-diffusers), 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.

![Two stage sidelight diffuser model (15° inverted)](https://cronoxyd.de/content/images/2022/03/85C1-two-stage-sidelight-diffuser-model--15--inverted-.jpg)

The main points of this design are:

1. 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.
2. Alignment - the intermediate diffuser is curved so that the light on it is approximately in the correct position for the screen.
3. Refraction - the light changes media 4 times before exiting the diffuser.
4. Distance - the sources of light are as far as possible from the screen.

| ![](https://cronoxyd.de/content/images/2022/03/DSC06559.jpg) | ![](https://cronoxyd.de/content/images/2022/03/DSC06568.jpg) |
| ------------------------------------------------------------ | ------------------------------------------------------------ |

The resulting illumination on the screen is very good compared to the trials:

![Two stage sidelight diffuser (15° inverted)](https://cronoxyd.de/content/images/2022/03/85C1-two-stage-sidelight-diffuser--15--inverted-.jpg)

But looking at the solarized version of the screen image, two problems can be identified.

![Two stage sidelight diffuser (15° inverted) solarized](https://cronoxyd.de/content/images/2022/03/85C1-two-stage-sidelight-diffuser--15--inverted-solarized-.jpg)

1. The layer times are very visible on the screen and the intermediate diffuser, causing stripes to appear.
2. There is falloff on the side.

I plan to address these issues in the following ways:

1. 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.  
![Slicer wall width](https://cronoxyd.de/content/images/2022/03/Slicer-wall-width.png)
2. The sources of light will be rearranged to decrease distance from the sides.  
![Diffuser light source locations](https://cronoxyd.de/content/images/2022/03/85C1-two-stage-sidelight-diffuser-light-source-plan--15--inverted-.jpg)