# Optimal spacing of diffusive sheet between light and destination

1. Apr 29, 2014

### ares

Hi,

I have 4 fluorescent tubes in plane A as a light source. Plane B is receives the light and is parallel to plane A. In between I'll put a sanded piece of PMMA in order to scatter the light. Each plane is approximately 250*300 mm. For a fixed distance between A and B, lets say 200 mm, what would be the optimum position of the sanded PMMA in order to achieve maximum light scatter at B? This is all in a closed box of 250*300*200 mm.

If you put the diffusive sheet very close to the light you can clearly make out the seperate tubes which might mean that maximum scatter is not achieved. On the other hand if you place the diffusive sheet against plane B there will hardly be any scatter at all.

Would you say that placing the sheet as close as possible to A is optimal or is the optimum somewhat away from A?

The goal would be to reduce the distance between A and B as much as possible to get a small box while still achieving sufficient scatter.

Thanks in advance for any thoughts you have on this.

2. May 4, 2014

### Greg Bernhardt

I'm sorry you are not generating any responses at the moment. Is there any additional information you can share with us? Any new findings?