Hi Red, gotta start somewhere. Beams looking good
Danny
I like my wider longer FL slide lens arrangement that uses the natural divergence in place of the concave expansion lens, here I am using a primary G2 and an expander to re expand then converge, but the G2 keeps the window and in the 07e's case the emitter clean.
Here's the 07 with my 25mm 2 element 52 inch Hitachi projection TV scavenged lens, there is no primary, just the natural divergence and the 25mm lens made from 2 lenses and a spacer, it clips 33% (est.) but works better than the 10X
I could come up with a foot long 3.5 inch wide tube with a sliding compound lens and get some real distance and super tight spots, but I need to use an AR coated dust window for the diode.
O-like has some for 2 dollars each, 14mm rounds but I could not get an order through.
I know, email them, I will. :beer:
But even better would be to use cylindrical beam shaping prior to this expander and that new 470nm with the can/window is a prime candidate, I just want to know the divergence, then I will let this expander sing the song of the burning needle thin spot of shining blue gory.
That and a longer expander would multiply final distance, but these are made to work with a wide range and are by nature short, it's a compromise expander made to fit a range of diverging beams, but at 10x we still need to tune the primary, because if you are getting a round spot from a rectangle beam with a radically expanding axis then you are clipping a lot of your power.
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that's one sorts issue with mine. hoding up all that weight is just the g lens in the module, but if I hold it by the head, which I often do as that's where the weight is, I can use a finger or two to keep the FA steady.
you say the g 7 lens are near the end of the module when threaded. does that mean if I swapped the lens on this setup, all the weight would be held even more tenuously?
I would stay with the G2 but continue to build dedicated thread in adaptors, using the little lens as a support member is going to introduce a lot of misalignment.
Our builds could have threads for an adaptor that has threads to fit the expander, that way we can make other adaptors for other expanders.
I want to correct the wild divergence then make any threaded adaptor I want for any expander I wish to use, just a flat face with 3 threaded screw holes would suffice, then any threaded adaptor will attach by the 3 screws, add some set screws placed inward of the attachment screws and alignment can be trued unit by unit.
