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- Feb 12, 2016
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- 63
Yes, me too always wanted to make a focused burner like this one:
but regarding how much it would consume with all NUBM44 diodes I have first tought to build a smaller similar thing with lower consuming 405nm diodes.
The original idea was to try with BDR-209 single modes because of the high power density in the SM beams but orientation of the beams in the DTR modules was far from constant. This should be due to the fact that it is very difficult to press 3.8mm LD into the barrel keeping it exactly straight. However, with bigger bodies of 5.6 and 9mm LDs this should be easier.
I also noticed that the 1" PCX lens from Thorlabs enters well into the maglite head what means that there is no need to do a special adapter. Only adapter I had to make was an Al HS plate to hold 5x 12mm DTR modules. More than 5 would not pass into magite head and if I would add another module into the center like in this video, then I do not get how the heat from this one would go out!
Once I have received the cylinder from CNC shop (dimentions: 48.25x15mm) I inserted 2 modules with BDR-209 and 2 modules with new Sharp GH04W10A2GC diodes (all with new G-8 collimators) and tried to focus them into one point with Thorlabs lens. The beams from BDR-209 never came to the common point but the beams from Sharp LDs did combine pretty close into one point.
After this I purchased 3 more Sharp diodes with drivers from DTR and tried focusing with 5 Sharp LDs with DTR G-8 collimators installed with drivers connected in parallel. Well, this was not perfectly one point but all 5 spots could fit into a 3x3mm square.
I also modified the switch a little and first tried to feed these drivers with 4, then 6 and 7 Energizer D cells as the Maglite body was made for them. But even with 6 and 7 D cells (I have 2D and 4D maglites with 2D and 1D extensions so can do any combination) the total voltage fell from 9V to 4 - 4.7V at 3.3A drain.
The way to increase voltage was to apply SAFT Li-SOCl2 cells which are found on ebay in D size. But when I tried 2 of these cells, I found that the maximum current they could afford was 1A only!
Luckily, these are also produced as LSH 20 model with maximum drain of 4A in spec sheet. So, when I tried 2 of these the current reached 4A but the voltage fell from 7.2 to 3.9V at this current drain (and one of batteries made some smell of sulfur after trial!!!).
Finally, added 3rd cell and now the voltage keeps at 9.2V at 2.3A drain what seems reasonable for 5 of these drivers connected in parallel... No more smell, no sound, a lot of violet light!
but regarding how much it would consume with all NUBM44 diodes I have first tought to build a smaller similar thing with lower consuming 405nm diodes.
The original idea was to try with BDR-209 single modes because of the high power density in the SM beams but orientation of the beams in the DTR modules was far from constant. This should be due to the fact that it is very difficult to press 3.8mm LD into the barrel keeping it exactly straight. However, with bigger bodies of 5.6 and 9mm LDs this should be easier.
I also noticed that the 1" PCX lens from Thorlabs enters well into the maglite head what means that there is no need to do a special adapter. Only adapter I had to make was an Al HS plate to hold 5x 12mm DTR modules. More than 5 would not pass into magite head and if I would add another module into the center like in this video, then I do not get how the heat from this one would go out!
Once I have received the cylinder from CNC shop (dimentions: 48.25x15mm) I inserted 2 modules with BDR-209 and 2 modules with new Sharp GH04W10A2GC diodes (all with new G-8 collimators) and tried to focus them into one point with Thorlabs lens. The beams from BDR-209 never came to the common point but the beams from Sharp LDs did combine pretty close into one point.
After this I purchased 3 more Sharp diodes with drivers from DTR and tried focusing with 5 Sharp LDs with DTR G-8 collimators installed with drivers connected in parallel. Well, this was not perfectly one point but all 5 spots could fit into a 3x3mm square.
I also modified the switch a little and first tried to feed these drivers with 4, then 6 and 7 Energizer D cells as the Maglite body was made for them. But even with 6 and 7 D cells (I have 2D and 4D maglites with 2D and 1D extensions so can do any combination) the total voltage fell from 9V to 4 - 4.7V at 3.3A drain.
The way to increase voltage was to apply SAFT Li-SOCl2 cells which are found on ebay in D size. But when I tried 2 of these cells, I found that the maximum current they could afford was 1A only!
Luckily, these are also produced as LSH 20 model with maximum drain of 4A in spec sheet. So, when I tried 2 of these the current reached 4A but the voltage fell from 7.2 to 3.9V at this current drain (and one of batteries made some smell of sulfur after trial!!!).
Finally, added 3rd cell and now the voltage keeps at 9.2V at 2.3A drain what seems reasonable for 5 of these drivers connected in parallel... No more smell, no sound, a lot of violet light!