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175mW 638nm Ehgemus with Mitsubishi Single Mode Diode

Blord

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In this review I want to show some in-and-out of the Ehgemus host with a 638nm single mode diode. I bought the host from Ehgemus a few weeks ago. :drool:
The host is very sleek and lightweight. It is completely made of aluminium. It has room for one 14650 3.7V Li-ion battery. The diode pocket is integrated in the host omitting the module and the heatsink. I had an idea of putting a single mode diode into it. This beautiful host deserves a diode with nothing but the best beam/dot spec.

After buying the 110mW Mitsubishi Single Mode Diode (ML520G54) I could start building the laser. With the information from RHD about the maximum current I decided to use a single AMC7135 ic as a driver. This little bugger delivers 350mA constant current with one 3.7V cell.

Enough talking. Here is the pictutorial :beer:

The Ehgemus 14650




The famous buttersmooth switch :)


Excellent finishing. You can't see which part is the rotating head. :undecided:



The Build

AMC7135 ic on a proto board. I cut a square of 3x3 points as driver base.
This thing is TINY !


Make connections between the points and solder the wires.
red wire : battery+
black wire : battery-
blue : diode+
white : diode -


All three pins of the diode are used for the driver. Ehgemus has already a wire for battery+ so I use this yellow wire.


I glue a moon shape aluminium sink under the driver. Then the whole assembly is glued into the brass tube.
It takes some fiddling to fits all the wires but I managed. ;)


Add the lens, the 14650 battery and the laser is ready.




The beauty and the beast ! :crackup:



BEAMSHOTS









Good round dot. It has on both sides wings like the LPC-815/826 diodes.
The distance was 10 meter/30 feet


High-power short focal lens


650nm AR coated Acrylic lens. This lens gives the best looking dot.
The 3-element glass lens looks very nasty with this diode.


Color comparison 638nm vs 660nm red laser.


I made a nice case for the laser. A perfect gift ! :bday:

I hope you enjoy the tour and ceeya ! :wave:
 
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offroadfreak8582

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Awesome :beer: love the pen style single mode combination! And damn your pictures there so nice lol

+rep where i can

Greetingss,,

EDIT: must spread rep :(
 
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Blord

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Awesome :beer: love the pen style single mode combination! And damn your pictures there so nice lol

+rep where i can

Greetingss,,

EDIT: must spread rep :(
Still up ? It is 3 AM now ! :beer:
Go and spread rep then come back to me :)
 

RA_pierce

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Nice!
I really want one of those single mode 638s.

How does the brightness compare with your 300mW and 350mW 660nm lasers?

By the way, I really like your backyard. :)
 
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DTR

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Now that's purdy.:drool:

Great host choice. Ehgemus makes some of the best hosts and I am a huge fan of the 14650 sized ones.:)
 

DJNY

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Veryvery nice!

As Daniel, I´m also interested in the brightness compared to a 300mW 660nm. But if the wl-shift is not too big (what I personally doupt in this small host), it should be BRIGHTER than the 300mW 660nm.

I´m much more interested in a good powered 635nm single mode than a 1W 638 (+/-) multimode.
 

Eudaimonium

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God DAYUM!

It couldn't be any better if it had a pair of boobs machined into it!

Suddenly I feel like I don't need a kidney anymore.
 

Eudaimonium

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Dafu-- That's not the direction of the thread I desired!

Boobs that do not share a body with a moustached face are perfectly OK.. Let's be civilized, now.

Or compliment Blord's laser but since we're all jealous anyway and started talking about boobs instead, I'm sure he'll understand.
 

InfinitusEquitas

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Nice! I'm also curious about visibility... vs 650nm, and vs the multimode 638nm's?

+Rep... awesome beamshots.
 

jander6442

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Yes nice build... again with the rep must be spread around meh!!! your building them faster than I can spread rep.
 

Blord

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Thanks for the appreciation. :wave:

I will make a comparison shot between 175mW 638nm single mode, 500mW 638nm multimode and the 250mW 660nm LPC-815
I am waiting for the evening/night. It is now a bright sunny day :)
 

lowell389

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Great laser blord.

Ya got to love those ehgemus hosts! Every one I see makes me drool.
 

piferal

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Very nice laser and photos,

I also love the 635-638nm, one of my favorites colors.

Congrats :beer:
 




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