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Build/Review: 1W 405nm Sinner Cypreus IIb

Jstr

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Hello everyone,

First review here, I'll try to do Sinner's host justice.

So I originally ordered the last Cypreus II with the dual driver mount, but unfortunately that one was damaged in a few spots. Then I talked to Sinner, showed him the damage, and almost immediately he offered to send me a new host, the Cypreus IIb. Which was amazingly kind, and I am so thankful. He's a great guy.

I finally got around to building it, a little overdue. Here are the pics:

Disassembled and coated with Everbrite


Close up on my module:


I used a blitzlinear driver set to 720 mA. These drivers are solid, and I heatsinked it on both sides (which also isolated the driver, which is continuous positive)

Side view:


It fit nicely inside the heatsink, with room to spare.


I then thermally connected the bottom driver heatsink to the main heatsink for best heat transfer


I tried to solder to connect the contact board, but that just did not work, so I ended up sandwiching the driver ground wire in between the contact board and the heatsink


Screwed in the heatsink and lens (g2, which was too short so I added thermal paste between the lens and the focus adapter, which worked well)




Quick power test read 989mw (did not have time to clean the lens yet)


Now for the beams:

It's blue?? Not really, just my galaxy s3 camera...


A little better

Through a diffraction grating


Conclusion:
- Great host and innovative design
- Amazing customer service
- Nice weight, feel
- Of course, this heatsink is outstanding and also overkill for this diode/driver combo (intentionally so)
- I like the idea of interchangeable modules, I will need to pick up a couple extras.
- I highly recommend

Suggestions: (very small, inconsequential things)
- If it was me, I might put a spring inside the tailcap, so there does not need to be one on each of the screw-in modules (and so nobody thinks it's case positive)
- The o-ring on the front could be a little smaller, it's very tight and the focus is difficult to adjust.

Thanks for reading
 
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Gabe

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Hot damn that's a beautiful host. You're a lucky man!
 

crazyspaz

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Man sinner does some nice work. Heck, all the forum machinists do! I think we are lucky to have so many members talented on the lathe :)

Did you let the thermal expoxy on the driver heatsink set before epoxying that to the host? Because if so the heat transfer from the driver/heatsink->host is probably about nothing, due to the thermal epoxy not necessarily being a great conductor- its made more for filling small air pockets i.e. from the driver to the heatsink. Shouldn't matter though, that little heatsink on the driver will do just fine.

That's a solid build for sure :) I really wish I had the spare cash to grab a host from sinner, I actually haven't ever had one from him- something I hope to change soon :D
 

Shakenawake

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one problem with my 405, since the driver is not heatsinked, the output starts flashing around a minute into the duty cycle. it's kinda nice since that's the duty cycle I like for the tiny little diode anyway, it's an early warning system kinda. what glorious lasers these make. mine does around 910mW though I'm not sure of the current. I wanted .5A but DTR said he may have set it @ .6A. so I'm very happy with that performance from less current than most around here use. hope yours lives long at .72A. very stable outputs on these
 
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Jstr

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one problem with my 405, since the driver is not heatsinked, the output starts flashing around a minute into the duty cycle. it's kinda nice since that's the duty cycle I like for the tiny little diode anyway, it's an early warning system kinda. what glorious lasers these make. mine does around 910mW though I'm not sure of the current. I wanted .5A but DTR said he may have set it @ .6A. so I'm very happy with that performance from less current than most around here use. hope yours lives long at .72A. very stable outputs on these
Wow that's great efficiency

I have limited my duty cycle to max 45 seconds so far just to be safe because I killed one already from overheating I think.

And yeah I was amazed how stable this diode is. Thanks


Man sinner does some nice work. Heck, all the forum machinists do! I think we are lucky to have so many members talented on the lathe :)

Did you let the thermal expoxy on the driver heatsink set before epoxying that to the host? Because if so the heat transfer from the driver/heatsink->host is probably about nothing, due to the thermal epoxy not necessarily being a great conductor- its made more for filling small air pockets i.e. from the driver to the heatsink. Shouldn't matter though, that little heatsink on the driver will do just fine.

That's a solid build for sure :) I really wish I had the spare cash to grab a host from sinner, I actually haven't ever had one from him- something I hope to change soon :D
Thanks and he definitely does.

You're right, it's probably not ideal because of the space. I let it dry first to isolate the pad, but there's also copper wire between the bottom of the driver and the main heatsink. For now, I'm keeping the run times low :)
 
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crazyspaz

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Well like I said, the heatsink on the driver is more than likely enough, I was just pointing out that you probably aren't getting much heat transfer to the host.
 

Pman

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I have that same host but chromed with a 1.5W 520nm in it and it's a beaut;). Have never reviewed it. Congrats! Nice build and I agree with the O-ring assessment. Really needs a thinner one if you are going to play with the focusing. I bought an extra heat-sink just fro easy swapping if I want but haven't done anything with it yet. +REP
Oh, yeah, ended up putting a small piece of wire (clipped a piece off of a spring) to put in the focus adapter in front of the lens so it would allow it to get close enough to the diode to focus at distance.
 

Mattronium

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Nice build. That's a lot of copper! :drool::san:
You said you limit the duty cycle to max 45 seconds, does it feel warm at all at the end? I'd think it should have longer duty cycles with such good heat sinking:thinking:.
 

Jstr

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I have that same host but chromed with a 1.5W 520nm in it and it's a beaut;). Have never reviewed it. Congrats! Nice build and I agree with the O-ring assessment. Really needs a thinner one if you are going to play with the focusing. I bought an extra heat-sink just fro easy swapping if I want but haven't done anything with it yet. +REP
Oh, yeah, ended up putting a small piece of wire (clipped a piece off of a spring) to put in the focus adapter in front of the lens so it would allow it to get close enough to the diode to focus at distance.
Nice. I wanted to do the same thing actually, but it was just too expensive for me :)

Nice build. That's a lot of copper! :drool::san:
You said you limit the duty cycle to max 45 seconds, does it feel warm at all at the end? I'd think it should have longer duty cycles with such good heat sinking:thinking:.
Not in the slightest. Heat-wise, I would estimate the duty cycle more at 4-5 minutes (and that would be limited by the driver!). I'm just being cautious because I killed a couple of these diodes already haha
 
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Podo

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Nice host! I killed few of these diodes before I found a freak one too. It can handle a little more current and outputing 1.1W - the 405nm build under my signature with the challenger host, it heats up shortly after a minute but the output is quite stable. The only downside is a 14500 won't last long with it though for such small host and power, defintely go in to my top 3 favourite handhelds list.
 
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Jstr

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Nice host! I killed few of these diodes before I found a freak one too. It can handle a little more current and outputing 1.1W - the 405nm build under my signature with the challenger host, it heats up shortly after a minute but the output is quite stable. The only downside is a 14500 won't last long with it though for such small host and power, defintely go in to my top 3 favourite handhelds list.
Thank you! Yeah these are very stable and mine does a little over a watt, which is very nice. Great divergence too. The only downside is the dot gives me a headache even when using my peripherals. I love the challenger for 405nm and was going to buy it but was already spending way too much. Easily top three for me too.
 

DTR

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Very nice build. I would say though you might be getting a bit of foldback if you are only getting 980mW @ 720mA. I suggest setting them for 600mA. Check out the video below that is what I usually see @ 600mA. If I do set them to 700mA by request I usually see around 1.1W(but keep in mind that assumes some life reduction running it that high).

Maybe the driver is not giving you exactly 720mA but if it is you may try turning it down a little if you can. The power might actually go up.:)
 
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Jstr

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Okay, thanks for the info! I will try that. Although I just sold my LPM so I won't be able to test it. I was looking at a graph of the output vs current when I set this, but maybe that was wrong. I think it was made before we had much info on this diode.

Edit: also the lens was a little dirty when I first LPM'ed it, so it actually does around 1.03 watts
 
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mortuus

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nice build i like how 405 looks better on crappy cellphones then when u look at the beam in dark room it appears alot brighter captured on camera.
 







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