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Sorry for the grammatical errors... I am still new to the scene. For the testing I am planning on using a concave mirror and one or two bi-convex lens. I hope that is clear enough now. I follow what you are saying about the spreading and reflecting. I have some cheap laser pointers around to do...

Well on a good note I checked with a contact of acquaintance and I will be able to borrow some supplies to do the testing I need. I should be able to post results (and maybe pictures) by the weekend or early next week.

Culminate:  To bring to the point of greatest intensity or to completion. Though I'm not looking to bring the beams to a single narrow beam, not anymore anyway.  They have to be culminated at a point to get the diffusing lens to produce the correct result, I want a wide beam about an inch or...

You are correct, the application I am looking for requires a closed system... no exit beam.  So if I understand you correctly feeding the wide beam back through the diffusing lens is going to result in the original 5 beams and they should reflect back and blow the diodes.  The logic is there...

Ok, I have seen the double lens before. The issue is that I need to get a closed system, I want to get the light to go down and come back without being a danger to the diodes. That is why I was looking at the concave mirror to reflect and culminate. Has anyone used a concave mirror for anything?

Ok, thanks, that is a start. Do I need to add a culminating lens first and the diffusing lens?

I posted over in the Tutorials, Help & Repairs... and got no responses.... so I was going to post here and see if you guys can help, it is mostly an optics question. Still looking at using multiple LDs but I don't want to culminate them now.  I want a wide bright beam.  Would I be best to use 2...

As stated here is the image I was talking about... Please let me know if this will create a closed circuit that will trap the light.

Last time Electrofreak was kind enough to answer my questions.  Since then I have learned a little more and have alter my project slightly. My New Question: Still looking at using multiple LDs but I don't want to culminate them now.  I want a wide bright beam.  Would I be best to use 2 lens to...

Thanks ElektroFreak, that helps me quite a bit. Anyone else have any suggestions or info?

I have been lurking around the forum for a few weeks reading info on what I am trying to do. Unfortunately... I'm new to this and would like some simple straight answers. I apologize in advance and even if you just point me to the topic posts I need I will be grateful. Was looking at the laser...