I have several Chauvet Intimdator LED moving heads. I wonder if an aperture gobo (small hole gobo) would effectively make beams like this pic? I know that's not how the yellow beams in the rig below are accomplished on such a big scale, but at a bar gig, could it have a similar effect? Could a gobo like this maybe do that on a small scale?
...but wondered how the lens would impact the remaining beam...
I get the science of optics and beam angles, etc. ... but the aperture did not result in a tight beam, it is still very much a cone of light. That's not what I'm going for.
...to put it in other words, a gobo or iris doesn't change the beam angle of a light - it only masks part of the light to achieve the desired look. Think of it as a subtractive effect.
I initially started looking for concave lenses that were about the required thickness, but at best I get large versions of that diameter-wise and expensive. I'd have to somehow cut them down to diameter. The gobo in my lights are allowed to be 1.1mm, but the engineer in me sees way more room, especially if I glued the lens into the holder/gear. I assume I could use the full thickness of the gear that way. The thought was the concave lens would tighten the beam as it headed towards the standard lens, giving it a different incident angle resulting in tighter overall beam but without using the power of the LED. It looks like an undertaking.
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