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DTR,
How does the near field beam size look? Is this a lot smaller than the M-140? Once you have them nearly perfect at 30 feet then take a mirror (even a second surface wall mirror works for this because the spots are so small that the mirror is pretty high quality over small scales) and send the beam back to a screen near you and fine tuning of the focus is a snap.
Ok here are some power measurements with a G-2. These were done without a lot of cool down time so there may be a little higher peaks for the higher currents with active cooling.
1270mW @ 1.2A
http://imagizer.imageshack.us/800xf/...0/p1019642.jpg
1540mW @ 1.4A
http://imagizer.imageshack.us/800xf/...8/p1019640.jpg
1720mW @ 1.6A
http://imagizer.imageshack.us/800xf/...9/p1019643.jpg
1830mW @ 1.85A
http://imagizer.imageshack.us/800xf/.../p1019645o.jpg
Here is what I think I am seeing. I noted the focused line is vertical with the shorter aixiz of the raw output not the long when focused.
http://imageshack.us/a/img832/9413/n...apimage3df.png
very interesting. i'd like to see one through a anamorphic prism set..
Quote:
Originally Posted by DTR
I'll try to post pics of mine when I get it. I have already ordered one. I have one of Dave's sets of prisms and a set of Dr Lava's cylindrical lenses with 5x and 6x planoconvex. I can try each. If it looks good through the prisms, I may forego setting up the lenses since they are a little more difficult to get "right". If I had to guess, I would think that this is going to be just about perfect for graphics. The way my current diode is, corrected, it looks like the PLTB450 uncorrected. I can only surmise that the PLTB450 is going to be almost a dot when corrected.Quote:
Originally Posted by swamidog
nice!
i made a complicated dual 445 rig with 2 sets of prisms and a pbs cube. it does a pretty stellar job with the old school 445's. i'd like to try it out with the new diodes.
Attachment 34702
at 40'...
Attachment 34703
Quote:
Originally Posted by absolom7691
That is a really awesome cofiguration. That spot is almost perfectly round! I like the trilobite on the table too! :cool:Quote:
Originally Posted by swamidog
I would love to know the beam dimensions near and far field. The beam expanding method is less important, but some expansion is necessary so the near field becomes large enough to accurately measure. The raw and focused graphics from DTR are very exciting. If the near field height is only 1/3 that of the M-140 and still focuses to a smaller stripe that is a NEW diode. Got to find out what the near field beam size is.
Agreed. If he doesn't get around to measuring, I'll do it when I get mine. If it is, indeed, a smaller NF beam, are you going to redo your blue monster?Quote:
Originally Posted by planters
Here is this one better? Also the M140 was metered @ 2.2W and the PLTB450 is only being driven @ 1A(only driver I had below 1.4A) and measured about 1050mW so that is why it seems fainter.
Paced out 30 feet so it could be off by a foot or two either way. Measured the line with my calipers.:)
http://imagizer.imageshack.us/800xf/.../p10196601.jpg