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- Oct 14, 2012
SAME GREAT Ti-B..... DIFFERENT WAVELENGTH
This project was supposed to be a "quick" diode/driver swap, yeah sure. It started out over 5months ago! Actually, in all reality, it started out well over a year ago, when I got my first glimpse of the Ti-B in Blords pictorial review (11/13).
I knew then, that I had to have one, and promptly ordered, and received my 1st Ti-B 532nm from Hakzaw1. From that point on, I've dreamed of having a "Ti-B wavelength rainbow".
IIRC, at one point, there were rumors of JetLasers themselves making Ti-B's in other wavelengths, but it wasn't to be; probably too cost prohibitive using these beautifully machined titanium hosts.
My first step in creating my rainbow was to use the Opnext 120mW 638nm diode (HL63603TG) with a flexdrive set at 300mA, for some single mode goodness!
Having never disassembled a Ti-B, I asked an expert builder extraordinaire (Thanks jayrob), if he could be of assistance; he graciously took on the task, and succeeded in getting it carefully disassembled.
Heat was required, everything is glued well!
One of my main objectives was to try to retain J/L's ultra smooth internal focusing system, keeping the stock original look.
I think with a little "reverse engineering", and some trial & error, the results were better than expected.
The next few photos show the details of what was done to modify the J/L focus system.
First, the existing focus lens is removed from the focus adjuster (I had to use heat on this also).
I used a couple of steel pins that fit the holes in the lens holder, but needle nose pliers, or a spanner wrench would also work.
Next, I made a threaded aluminum adapter to allow the J/L focus adapter to work with the standard 9.0mm x 0.5mm lens assy.
I used the extended version w/G-2 lens. the extended holder allows for threading into the adapter, plus enough length to enter the copper diode module far enough to focus properly.
My original plan was to bore out the copper module to give the lens holder clearance so it could move in and out freely without rotating, but that option made the module too thin to support the pressing of the diode.
An alternative method was to turn down the threads on a portion of the lens holder (thanks DTR). It's thin, but it works great!
Complete focus assembly, looking from the front
The focus assembly, looking from the rear (diode side), mounted in the host front piece.
Copper module with diode, in aluminum heatsink, mounted in host.
J/L diode, module, and heatsink (left), and my replacement assy. with gold plated spring, and the battery contact board. (right)
A close up showing J/L's driver with extensive aluminum heatsinking, which is attached with liberal amounts of thermal adhesive.
Edit - The following two pics added 3/1/14.
The next two pics show J/L's original white nylon battery spacer/spring support, along with the fiber replacement that I made.
I found that the nylon piece wouldn't stay glued inside the titanium battery tube no matter what adhesive was used,
so every time you remove the battery, the nylon piece falls out. So far, 2 part epoxy is working well on the fiber replacement.
Another obstacle that I came across was when LPMing, I noticed that the output was reduced by aprox. 30% when the crown was in place,
I'm not sure if the lens/filter is just an AR lens, or if it incorporates an IR filter also, but it definitely reduces output, so, it had to go!
<<<POWER OUTPUT READINGS>>>
With J/L's filter removed, the power output readings seem pretty typical of this diode with the driver set at 300mA.
Average power output - using a G-2 lens. (60 sec. run time)
Maximum power output - using a G-2 lens. (60 sec. run time)
<<<A FEW BEAMS & SOME REFLECTIONS>>>
JUST A NOTE: Jetlasers sells only complete, working Ti-B 532nm lasers. They do not sell hosts only!
Last, but definitely not least, I'd like to thank all who helped me with this. :beer:
JetLasers/Gray - For making such a great laser.
Hakzaw1 - for support, and knowing all things J/L.
jayrob - For assistance in disassembly, and valuable advice.
DTR - for help with lens mods., and also, as always, a great diode/driver.
A well deserved +1all around, this couldn't have been done without all of you !!!
Thanks for trudging through all of this, sorry for the excessive length!
All comments and critiques are appreciated!