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Put a 30-80mm FL spherical lens in front of it. Problem solved.

I've been thinking about this. I am fairly confident I can build a manually operated jig that could do this. The part that scares me is how to place the tiny little glue droplets? UV glue for sure. But how to not make a mess of the lens, diode, etc? Stumped on that one.

This would be an awesome undertaking. Very challenging for DIY. Very worth while to try. Maybe start with red diodes for the reasons kecked noted above. I do think it might be possible to mount longer FL (1-2)mm EO FAC lenses directly to the can of blue or green diodes. This could fully...

I suppose we could give up on all terminology and convention. Its way more fun that way. I'll give it a try. If we squash the tall unicorn with the eye of the eagle it will look much better when taking flight. If the path of the golden ray is long walked the health of the ray improved...

This is exactly right(y) Keep in mind what happens before the collimator lens affects what happens after in a inverse ratiometric way. For example... Say the raw diode beam angle is reduced so the beam height when it hits the collimator lens is 1/2 what is was before, the FF spot will now be...

Its 1 deg not 1mRad. 1 deg = about 17mRad. Think about this. A standard 8mm EFL aspherical lens produces aprox .2mRad on the FA, A 4mm EFL (G2) produces aprox .4mRad, A 2mm EFL produces a aprox .8mRad. So just extrapolate backwards to 17mRad. Very short EFL for collimation. Most FACs i...

Look at the FA raw divergence on their spec sheets for "linear" and "square" of the same type diode. This should "clue you in" to whats happening.

Im pretty sure you are correct that its not FACed I was hoping to get a comparison of the new sharp (un FACed) green to the nichia. The 700mW sharp red has half the emitter size of the P73. I was hoping for half the emitter size on the new green too. Fingers crossed.

Very cool! The sharp is on the right? How does the divergence and spot size compare to the 1w Nichia?

Most likely they are using a piece of fiber to act as the FAC. FACing a diode would make it easier to launch into a fiber.

I have been meaning to post this for a while. I have a novel approach for combining the beams of these multi emitter diodes. Basically just two long FS mirrors redirecting the outer beams to overlap in the far field. works really good. The shorter the FL of the collimation lens the shorter...

Looks like the mod input on the 8A is just a voltage input. One pot should work fine to drive multiple drivers. Depending on the input impedance of the drivers a lower value pot might be needed. Depending on the voltage of the battery pack 2 or 3 diodes in series per driver might be more...

Tiny tiny cuts and lots of lube. My guess is the extrusion may not be very round. Also if the ends of the fins have a radius the contact area will be low. I have never turned a heatsink but have milled lots. And yes, too deep a pass and your in big trouble. 4 jaw is all good. It will be...

oops I goofed the order up a bit on my typing. I meant set the tailstock perfect to take a pass on the finned heatsink not the bore operation. The .0005 is just a guess. Maybe even .001 will work. You will have fun chucking up that hex piece👺 Or just buy a 6 jaw chuck. Haha kidding (go...

When I've had to design something with thermal management in mind, be it a heatsink with fan or TEC, I start with heatsink calculators on the web. This is a good place to start if you know the heat input in watts to the heatsink. Some of the more advanced calculators even do pressure drop...

For reference. 8mm Fl lens gives 1.75- 1.8mRad on the green 1Watters.

This exactly what I visualized in my mental couch exercise. If you look at the rays traced in the pic (just reversed direction) it does appear to work in that radial direction (this is due to the refractive prism action). If you visualize the input ring as a group of beams like a telephone...

Sadly, I think getting all the beams co-linear and overlapped violates the laws of the universe:( I'm really intrigued by the axicons. I've been thinking about them since you posted about them the other day. At first they confused the crap out of me. It was really hard for me to visualize...

The raw divergence from the emitter is due to the geometry of the cavity, wavelength, etc. This is true, but only before you collimate the multiple beams. After collimation the far field is just an image of the emitters including the space between them. No clue? Yes.

Prism correction is nice especially the amount of space they take compared to most cyl set-ups.. They have some drawbacks though. Usually higher optical losses. Plus they have the same "issues" as cyl lens correction when trying to correct multiple knifed beams. If you try to overlap the...