Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers



Cypreus II 1W Violet Diode Review

Minamoto Kobayashi

Well-known member
Joined
Aug 25, 2010
Messages
531
Points
63
Hi to all.
This is my first complete and almost well done review for a laser build, so be nice please :p
Starring two awesome items:

- The DTR 16X BDR-209 Diode In Copper Module With Driver @ 700 mA and 405-G-2 Glass Lens;
- The Sinner's Cypreus II copper host.

For this build I have used three new special guests:

- A new digital WELLER WSD81 SE 80W soldering station;
- A 7W Laserbee power meter with Ophir head;
- An handmade reamer.

So, let's start!

The soldering station:

7813fc.jpg



The 7W Laserbee:

a94ea5.jpg



The handmade reamer:

2cc363.jpg


This item was built usying a japanese white marker and a extra-fine sandpaper.
I put also some pre-lim paste over the sandpaper, a very gently surface cleaner.
The total diameter is about 11.5 mm, but I can easily vary it adding more coils of sandpaper.
I use this reamer to create a very smooth mirror surface into the heatsink hole,
to have a perfect contact between the parts.


The violet diode and the 0,05mm Indium foil:

8b0635.jpg



All the needed parts:

41ab45.jpg



Diode module gently scrubbed with extra-fine sandpaper:

8ae319.jpg



All the contact parts were extra-cleaned with the best cleaning liquid fluid available today in the market:

4db8a9.jpg



Diode with Indium foil wrapped around, ready to be inserted into the heatsink:

a65e33.jpg



Diode inserted with good pressure into heatsink.
No need to use the set screw.

ceb00f.jpg



Crown pressed into focus ring with the help of a vice:

3d4edc.jpg



Soldering and connect the inside wires:

8f8178.jpg



In order to avoid any possible short, I have added a soft piece of rubber between the screws:

cb645b.jpg



Assembled heatsink:

d359e7.jpg



The final product:

293460.jpg



Cypreus II on Manfrotto minipod:

EjHoJE.jpg



The beamshot:

786b86.jpg


The violet beam is very difficult to capture with a camera, especially to obtain the right colours.
This shot looks like a blue laser, but really is much more violet.
I was forced to use a 15 sec long exposure to have a decent amount of light.


The fluorescence ignition:

1d09a0.jpg


Those air-conditioner remote control buttons seems to be backlighted, but they are off!
This is a pretty fast reaction of fluorescent materials when affected by a violet frequency.


The performance graph:

201e0f.jpg


What an awesome diode! It is very stable, and tend to slightly increase output in the time!
I have limited the test to 90 seconds, but with Cypreus II surely I will have a longer duty cycle.
After 90 sec the copper become slightly warm, so Indium foil and copper parts are doing their dirty work! :)


Finally, the video:



The host was placed at about 3.5 meters from the mouse pad (yes, was a
professional mouse pad ... :yabbem:).
The surface began to smoke immediately! Also the match light at once.
The dot is so powerful, tiny and precise that ignite light wood pretty fast.
Goggles is a must, this is really a dangerous laser !

Conclusions: this is a masterpiece, powerful, precise, rock solid and made with a high craftsmanship.
I wish to thanks a lot two guys that allowed the creation of this project: DTR and Sinner.
See ya soon for my next reviews .. stay tuned! :beer:

Richard.
 
Last edited:



upaa27

Active member
Joined
Jul 10, 2013
Messages
619
Points
28
Nice build! I orered a custom host from Sinner! Can't wait until it comes in!
 

IWIRE

New member
Joined
Dec 18, 2013
Messages
630
Points
0
Cool build ! Keep them coming ! :) So is the foil better than thermal paste ?
The 405 is a cool diode ! Enjoy !
 

Minamoto Kobayashi

Well-known member
Joined
Aug 25, 2010
Messages
531
Points
63
Yeah it is better, for many reasons.
First of all it is electrically conductive, and this is a must to have a good path.
Then, it rest in place when the diode warm up a lot.
And finally, it does not become dry in the time.
Hovewer it is not simple to use in a round surface: for example, if You do not have the right tolerance, and the barrel is slightly too fat (or the heatsink hole is slightly too small), the Indium foil runs away.
I have found a perfect tolerance with a lot of tries with my handmade reamer. We're talking about hundredths of a millimeter!
 
Last edited:

danefex

Well-known member
Joined
Aug 30, 2010
Messages
1,598
Points
63
Very impressive build, you did a great job! Thank you for the detailed pictures too, very well done! +:beer:
 

The Lightning Stalker

Well-known member
Joined
Aug 14, 2013
Messages
2,655
Points
63
Even a .002" interference is enough to make the loose fitting G2 tight enough to have to be turned with a
screwdriver. Getting a good press fit is as much an art as it is a science.
 

rhd

New member
Joined
Dec 7, 2010
Messages
8,476
Points
0
Beautiful build!

Yeah it is better, for many reasons.
First of all it is electrically conductive, and this is a must to have a good path.

I don't quite understand how / where you're using the foil. At first I thought you were using it between the module and the heatsink (and it kind of looks that way from the photo), but you're not relying on a case pin for electrical conduction, so I think I'm wrong. Are you using it on the tailcap threads?
 

Minamoto Kobayashi

Well-known member
Joined
Aug 25, 2010
Messages
531
Points
63
Hi.
I use it around the diode barrel, and shroud both the barrel and the small copper heatsink where the diode is pressed into.
In this build I do not need electrical path thru the heatsink, but in other builds it will be very useful.
In this build I have used it to eliminate the harmful gap between the diode+barrel and my copper heatsink. More or less, it is a 0.025 mm gap. With my little handmade reamer I will forced to slightly enlarged the hole of the copper heatsink to obtain a perfect fit without any gap.
In that way I have a very good thermal dissipation copper-aluminum-indium-copper. Like a McDonald hamburger :crackup:
 

RayJay

Banned
Joined
May 2, 2014
Messages
344
Points
0
That is absolutely incredible! Beautiful build! Honestly.. That is some precise work there. I wish I had the patience and skill for that!
I have been thinking of casting modules out of some silver I have. Better than indium foil :yh:

Also, that is one stable diode!! Beautiful work!
 
Last edited:

sinner

Well-known member
Joined
Oct 27, 2011
Messages
2,566
Points
83
Took a good bit of work but I am glad it turned out just the way you wanted it. Good luck with the other one, Nice and detailed review.

:beer:
 

Shakenawake

Well-known member
Joined
Mar 11, 2013
Messages
1,961
Points
83
try a beam shot next to another, different wavelength laser, the color may turn out more accurate.
 

DTR

Well-known member
LPF Site Supporter
Joined
Jun 24, 2010
Messages
5,711
Points
113
Great build.:beer:
 

bdgreenb

Active member
Joined
Jul 20, 2011
Messages
722
Points
28
sweet build! might wanna bend the whole host a little bit :p
in case you don't know, i have the prototype of the host
 
Last edited:

hakzaw1

Well-known member
Joined
Apr 2, 2009
Messages
10,627
Points
113
SIX years have passed--this laser is now in my collection..
I necro because this is about the best review and pics ever.



Sinner afaik is slowing down and may not make many more hosts..
His work is excellent. I would suggest that we keep these at this point.

There may never be any more.

TY Richard and Sinner
hak
 




Top