Recent content by PhilR

Oh, I'm sorely aware. They're bad enough in areas I do know about that I'm not going to trust them in areas I don't. Still, it's a start, at least.

That's pretty much what we get now, with the naive substitution approach. There's enough internal structure on these things to block out the unwanted light. Problem is, the results are inefficient, dim, and generally provoke sadness and regret. I think we've established why people generally...

I'm aware, I just couldn't find a diagram with a single set of emitters on it! I've seen them in reality. And yes, I'm getting the idea. I think what I'm after could probably be done with solid state lasers but it'd be impossibly expensive, and I'm not sure how efficient it would really be...

That is in fact the problem. The old light source is an arc light so it mostly has a size of roughly the distance between the electrodes, on the order of 6-10mm by my eye. The new light source is an array of LEDs perhaps 25mm square. some are round. It is already reasonably diffuse...

Well, that's refreshing to know! Thanks, everyone. I can't take much credit for figuring it out. Having had these parts in my hands there was a certain instinctiveness to the whole thing. It made sense to me that where there's a large area light source with light coming out of every point on...

Further to earlier (and I hope it's OK to document my thought process here) I've done a bit more reading. From what I'm finding on places like Wikipedia, there is a fundamental problem with what I'm attempting. The article calls it étendue, from the French, but it's also called "acceptance" and...

Hello! I should preface this by saying that I work in the film industry where we use lots of different lighting devices, but this is not a commercial project. It's a hobby effort to help a bunch of slightly-used equipment avoid becoming e-waste. Not sure if this is high school, undergrad or...

Must admit I'm here just to beg some advice on optics, but I hope it won't be seen as too much of a liberty!