The last two days, with the girlfriend and son away, using from antique to brand new parts, I have build a new test rig that I wanted to make for a while now. It took many many hours to make, and now that it is finished I don't feel like starting some testing with it, I built it because of building it .
The question is: what is it?? :party:
Detail:
That detail bit was a real pain to build, I rebuilt it two times, wasted three leds over it (one XM-L2 and two XP-E2's), three switches, and a driver (most flashlight parts do not go well together with soldering torches). But I got it to work well and the output is within 1/3 of a percent constant from 30 seconds to over an hour.
Similar response to others: It’s for measuring the exact focus length of aspherical lenses and for finding the perfect sweet spot for best throw for reflectors.
Correct and correct. And DBSAR is right too of course
It is a reflector test rig (would work with aspherical lenses too). Together with two constant output light sources (one XM-L2, one dedomed XP-E2) and a fixed distance to the wall I can compare the throw of any reflector with led in perfect focus with all other parameters constant. Two different leds because people still believe that there's different optimal reflectors for large leds and for small leds (I don't believe that).
This is how the dedomed XP-E2 goes through focus (from well inside the reflector to well behind the reflector) of a Eagle Eye X6 reflector. There's a bit of dirt on the XP-E2-die (should not be a problem for the functioning of the rig) and axis of the reflector is not perfectly aligned with the direction of movement, that is why the shadows are not perfectly symmetrical .
Nice, I’m not much into reflector lights but the one I made for aspheric lenses could probably be rapidly adapted to test reflectors too. Right now I just need to finish the wiring on my 8A adjustable output power supply to replace the 3A one on the rig in the picture.
Nice Rig KKW, it is fun to see different solutions for similar problems. That panel of the 8A power supply looks great! I went for only 350mA because getting the output constant is easier at low currents. What helps is that my luxmeter reads down to 0.01 lux.