- Joined
- Jul 10, 2015
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- 9,987
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- 113
No, not other than the odd lens in my 150-200 lens collection, the 3 elements I have a dozen of are actually 31mm when removed from the holder, I call it 25mm because that's what's in the clear when in the holder.
However that 3 element set clips and the further the focus the more it clips as you push it away to focus further out, we need a more aggressive grind, a spherical grind perhaps.
Really just use what we have and the 3 element and sanwu 3X, that RX is pretty good, it blows the 2.5-3.0w NDB7875 away in reach and burning power by far and away.
I would like to see a 25-30mm long FL lens and housing, maybe even an anamorphic primary that is mounted on a can that you screw in until it bottoms out on a threaded ring that you can adjust so that you reshape the beam but leave it positive as far as divergence and then your main lens has a long thread range to tune the focal point.
But this is daydreaming, the average buyer wants a blue one and buys a thor or whatever is 59 dollars on flebay with lots of lies, I have 2 good solutions, #1 use a 3 element and sanwu 3X.....#2 use a G2, 6X Cyl pair and sanwu 3X
If someone would order wider modules and lenses, someone who knows how to calculate the needed grind, I would buy some, I would like to build a ring of 8 or so diodes in heat sinks that are articulated and align them to galvo mirrors that I could converge at a point.
Really a wider housing with a long FL lens and I would just converge a bunch of them, it's how much do you want to spend, the less you can start with the better, maybe soon it will be time to converge a dozen 7875's each with a 3 element, have you tested any, 4 of the 7875's with 3 elements will give a corrected and lensed up 44 a good run for a ways, really a dozen BDR-209's all converged, but any way you go it's 1000 dollars plus, I wish next month we would see an economy projector with 1 big SOB blue diode, I will find some lenses to make that sucker work and we are talking 600 dollars with some possibly repurposable optics.
Sorry I am rambling, go with a 3 ele and 3X, it works pretty good for 0-30 feet, or as a 3rd option you can use a G2 and the 6X cyl pair and leave the BE off, it's nice to have a fixed focus burner that works, that's what a laser should be in my opinion, ready to go as is.
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