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Multiple beams

RedCowboy

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Just messing around testing some different beam expander lens combos, yes I know there's a mathematical formula, however I am trying out some scavenged optics I have saved and purchased over time, the results are impressive with just 3 x ndb7a75's knife edged......would be even better if they were corrected then knife edged.


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kecked

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How about a series of beams in a line with colinear reds that March across the beams rbb brb bbr
 

RedCowboy

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I had thought about knife edging in 3 rows, 3 columns ( 3 x 3 ) ...so 9 Red, Green and Blue beams with similar dimensions/divergence laid out as RGB, BRG, GBR.

Single mode beams would be best to make a white beam.
 

biddy79uk

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Jul 6, 2013
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Sheltering in place and being somewhat bored I bought a used projector for cheap with 2300 hours and harvested 24 x M-140 diodes that work very well, I am driving 4 laser diodes in series @ 1.6a using a LM338 as a current regulator using 0.8 ohms across the adj. and output pins and 8 x 18650 in series,.....my expideted mounts are angle brackets giving me X and Y adjustment so I can converge the beams where ever I want to.........thinking about what else I can do with all of these diodes.......maybe knife edge a bunch ? Anyway just goofing around and thought I would post a couple of pics.

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Do we have a list of projectors to look out for
 

RedCowboy

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You want 24 of the 5.6 size 1.5-2W laser diodes for cheap .....search for xj-m and get one with low hours, 2500 hours or less are good, you need basic mechanical skills to harvest, de-solder.


 
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