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ArcticMyst Security by Avery

Raman-spectroscopy

Joined
Jan 21, 2018
Messages
324
Points
43
Hello,

the entire project is considered in detail quite complex and therefore not in a slip here to describe.
So I apologize for the fact that there are quite a few individual postings here,
but even the processing of all descriptions is associated with a lot of work
and the number of pictures would blow up the frame of a single post.

Here's the next part:

In addition to the already described component of the IR holder further side walls are equipped with functions.
The used DPSS laser has to be attached to the module in a stable position,
for this I have constructed a traverse.

1.jpg

This is flanged to the pre-existing threads and holes in front of the inlet (IR filter side).

2.jpg

3.jpg

The internally positioned dichroic does not reflect the total laser power at right angles to the subject.
I would not like to leave the rest (partly polarized) inside the ucube and therefore I just placed a side wall with a central hole on this opposite side.
Here I also see if the laser is placed in about centric position.

4.jpg

The stoke signal used for the evaluation must be bundled on the side opposite the objectiv and fed to the fiber.
For this I use again the collimator from the already known assembly of the beamsplitters of B & W-Tek.
Of course, other solutions are also easily feasible here, because almost any technical solution can be printed in 3D.
This collimator has a special fine thread, which I could actually print.
5.jpg

6.jpg

This assembly is placed in front of the long-pass filter inside and already described on the assembly side of the dice opposite the lens.
I have mounted several types of filters in such 30 x 30 x 10 mm holders,
which I can later try out or combine.

7.jpg

Once again a reminder of a picture of the functional whole assembly,
this can now be modified in further steps, that the handling of objects to be examined is guaranteed.

8.jpg

Finally, for this log a picture of the first functional result.
A clean clear signal in the strength of about 5000 counts exactly 1332cm-1 in stoke direction, so diamond.
So much in advance ..... there is still a lot more possible ....

9.jpg
 
Last edited:





Joined
Jan 21, 2018
Messages
324
Points
43
Hello,

In the next step, I significantly increased the efficiency of the assembly.
For this I had to find out which type of lens is most suitable for this compilation.
So that the comparison can take place under the same conditions I replaced the last used lens objectiv by a used microscope objective changer.
In this case, the changer has four positions with RMS thread.
So I can use at least some of my existing lenses from a cheap microscope.

1.jpg

The rear connection also has an RMS thread in this case, there are of course many other connection constructions.

2.jpg

Because of the eccentric change construction, I had to design a new side wall with an expansive cylindrical thread connection.
The necessary internal thread for this is now known and printable.

3.jpg

The fourth of the test objectives should be the already known from the beam splitter of B & W-Tek, because it has certain "characteristics" ...
In order to use this, I first measured this thread.

4.jpg

5.jpg

Now I have to print an adapter ring for this lens,
that had also worked quite well and the objective can easily be screwed to the revolver.

6.jpg

Now equipped with 4 different lenses, the unit can simply be tested by rotating the revolver under the same conditions.
The overall structure of ucube allows you to simply swap one side panel or one insert for other functions.

7.jpg

8.jpg

By far the best are the results with the B & W-Tek lens, because this has a convex surface inside, so that the laser reflections
expand and, together with the antireflex coating, give the least amount of reflection in the direction of the spectrometer.
In addition, the opening ratio is quite large and scattered reflections in the interior are minimized if the laser is not exactly centered.

Here is the result, left the rest of the laser with about 22,600 counts, which can be eliminated by a second filter and
right the raman signal from the diamond at stoke 1332cm-1 with 62.500 (!) counts and a resolution of MWHM 0.8nm.
Now I want to say here, that you can not get out more with such equipment. (Compare it with the last posted spec obove...).

9.jpg

Finally, then a preview of the next experimental setup (follows),
Here you can see the objective revolver described here.
The final assembly in a microscope I show later.

10.jpg


Bernd
 
Joined
Jan 21, 2018
Messages
324
Points
43
For those of you, who have an ocean optics usb spectrometer i found a free software to examine gem.

It should run with Ocean Optic’s OmniDrive

Link: www.gemmoraman.com/Downloads.aspx

I have no such device and can not test it ..... maybe Paul ?

Unbenannt.JPG
 
Last edited:
Joined
Jan 21, 2018
Messages
324
Points
43
Hello,

since I was asked here how the project is going on, i have decided to skip a few intermediate and test series as a posting.

Here are the essential parts for a complete device.

The various components should be attached to a microscope in one of the possible configurations.
At this microscope the objective tube is attached with a dove-tail connection.

After some attempts and irritations between zeiss-west and zeiss-east I printed such a dove-tail for the cube.

62960

Of course, this connection as a side wall can be adapted modularly to the described cube.

62961

The flanged laser has a certain weight, so I needed some support, which should also be screwed to the cube

62962

62963

The spectrometer board should also be attached to the cube here, also printed in 3D.

62964

Together with the already known SMA adapter and a fiber optic it looks like this.

62965

Now here the whole assembly mounted on the microscope, it is a cheap lomo biolam bought used for 25 Eur.
This is quite enough as a mechanical stable component for this function, because optically only the printed parts and the recycled parts from the B & W TEK as well as the various filters and dichros are installed.

62966

62967

This entire unit works perfectly with very high sensitivity in terms of the technical possibilities of the individual components.
Here is an additional spectrum of sulfur; as with spectra almost always the case, you can see in the spectrum the usual additional fluorescences.
I need to add a few Mw more of laser power to generate a raman signal from this mineral.
On the far left is still residual radiation 532nm to see, also because only one edge filter is installed, right of it are the useful signals.

62968

There will be a few additional attachments to follow if anyone is interested.

Greeting

Bernd
 
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pasajeros

New member
Joined
Feb 3, 2019
Messages
2
Points
3
Recently I got an Ocean Optics QE65 pro TE cooled spectrometer and I am using it with parts of the $50 ebay B&W TEK 473nm system which includes the factory probe, fiber cables (both the red and orange one), and the laser. The software I am using is oceanview by ocean optics. It has a RAMAN section in it. I read in the other posts that the factory B&W TEK probe and laser are aduquate enough for RAMAN spectroscopy for things with strong raman scattering like a diamiond or acetone/isopropanol, but what other useful applications can this setup be used for? A lot of the other posts say the problem with the B&W units were in the spectrometer and lack of good software. I have eliminated that part of the equation but using Ocean Optic's best spectrometer for RAMAN. and it Since I don't want to modify the B&W probe or laser, do you all think a setup in this form could be marketable?
 
Joined
Jan 21, 2018
Messages
324
Points
43
Hi pasajeros,

in your constellation (usage of the orign laser and probe) you need additional an edge or notch filter .
In the original usage, there is one installed behind the slit of the B&W-TEK spec, if you want to use an Ocean Optic's ,
you must find an other solution, maybe you can recycle the one of the B&W-TEK.

Greetings

Bernd
 
Joined
Mar 1, 2017
Messages
81
Points
8
Thanks a lot for the info, i have this software , but my version did not support this device ... so ... thanks for the news!!!
Yes it is a new,
The spectrometer shows as ThunderOptics, and i was directed to them to buy the license.
But really for 30Euros ... it is a veru good software

@ Chloderic, I am going to put bac the filter tonight and see the allignement problem

C
 
Joined
Jan 21, 2018
Messages
324
Points
43
Yes it is a new,
The spectrometer shows as ThunderOptics, and i was directed to them to buy the license.
But really for 30Euros ... it is a veru good software

@ Chloderic, I am going to put bac the filter tonight and see the allignement problem

C
Hi Civitus,

i am not able to switch to the device "ThunderOptics" in the device-list, it is not present ,

any idea ?

Greetings


Bernd

1553708781907.png
 
Joined
Mar 1, 2017
Messages
81
Points
8
Hi
Hi Civitus,

i am not able to switch to the device "ThunderOptics" in the device-list, it is not present ,

any idea ?
Greetings
Bernd

Hi Brend,
I had the same problem, but you have t o uploadthe latest version, and get the license it costs 30Euros.
Here is what i get :
63973
it is terrific, really to control the unit with thissoftware.
Enjoy
C
 
Joined
Jan 21, 2018
Messages
324
Points
43
Hi Civitus,

i had installed the last downloadable version , also i had uninstalled the old version and cleaned the registry, than installed new, but nothing changes, the device is not available. I have no problem to pay for the software, but i am not able to do so .....
Maybe there was a problem with the last version and they made tempotary a step back with the version ?
The aktual version is ?

63977

Greetings

Bernd
 
Joined
Mar 1, 2017
Messages
81
Points
8
Hi Civitus,

i had installed the last downloadable version , also i had uninstalled the old version and cleaned the registry, than installed new, but nothing changes, the device is not available. I have no problem to pay for the software, but i am not able to do so .....
Maybe there was a problem with the last version and they made tempotary a step back with the version ?
The aktual version is ?

View attachment 63977

Greetings

Bernd
Hi Brend,
I think it is how the licence system works, it is when you get the license that the ThunderOptics option is activated.
The best is you contact Friedrich, the developper of the software or see with ThunderOptics directly. I do not remember how it folded for me, just that after some messages exchened with them i was informed that it is now available and when i got the licence, i activted it, the logo starts appearing on the software.
The best is to see with them, i think.
C
 
Joined
Jan 21, 2018
Messages
324
Points
43
Hi Brend,
I think it is how the licence system works, it is when you get the license that the ThunderOptics option is activated.
The best is you contact Friedrich, the developper of the software or see with ThunderOptics directly. I do not remember how it folded for me, just that after some messages exchened with them i was informed that it is now available and when i got the licence, i activted it, the logo starts appearing on the software.
The best is to see with them, i think.
C
Two days ago i contacted Friedrich and will keep on .... thanks for the tips.
 
Joined
Jan 21, 2018
Messages
324
Points
43
I got no answer from Friedrich, so i contacted ThunderOptics and got a licence for 30 €.
Now the software is knowing the device and basicly it works.
I tried to integrate a RRUFF databse and the system told me, that in this version there is a limit of 42 entries in the spectral library .
This means, the software is not useful for a bigger database, or you have to pay additional 200 €.

Bernd
 




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