Optimal spacing of diffusive sheet between light and destination

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The discussion focuses on finding the optimal placement of a sanded PMMA sheet between two parallel planes, A and B, to maximize light scattering from four fluorescent tubes. The challenge lies in balancing the distance of the diffusive sheet from the light source and the receiving plane; placing it too close to A reveals the individual tubes, while positioning it near B results in minimal scatter. Participants are encouraged to share insights on whether the sheet should be positioned closer to A or at an intermediate distance for optimal scattering. The aim is to minimize the overall box size while ensuring effective light diffusion. Further input or findings on this topic are welcomed to enhance the discussion.
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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, let's 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 separate 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.
 
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