Testimonials: Customers about Tydex
Our customers are saying about Tydex optics:
17 October 2024
Dear Ekaterina!
Taking into account the repeated positive experience of purchasing from TYDEX, I would like to allow myself to contact you directly, not through the website.
Thank you in advance!
Best regards,
Dr. Vladimir Rumyantsev
The Institute for Physics of Microstructures of the Russian Academy of Sciences
Nizhny Novgorod, Russia
7 October 2021
Dear Vladimir!
We are very satisfied with the service, your products and the lead times when we order.
With kind regards,
Martijn van Amsterdam
TKH Security B.V.
Gouda, The Netherlands
3 September 2021
Dear Vladimir!
I am writing to let you know we are perfectly happy with the quality of the mirrors, and they work as we expected them while designing.
Sincerely,
Sergey Zenevich
Laboratory of Applied Infrared Spectroscopy
MIPT
Moscow, Russia
7 September 2021
Hi Valery,
We received the new Golay Cell and tested it recently. It works well. Thanks a lot.
Thanks a lot for your help.
All the best,
Yiwen
Research Associate
University of Rochester
Rochester, NY
USA
9 July 2021
Hello,
The previous parabolic mirror we got from you seems very fine.
Thus we would like to order more off axis parabolic mirrors from you.
Thanks in advance.
Best regards,
Pascal BLAIN
Research Engineer
Space sciences, Technologies and Astrophysics Research (STAR)
The University of Liège
Liège, Belgium
1 July 2021
Dear Ekaterina,
I would like to let you know that we managed to measure the lens you fabricated for us in our facilities. The results were excellent! Therefore I would like to thank you for the efforts in fabricating and sending us these lenses with a minimal delay. I hope we can get more lenses from you in the future.
Best Regards,
Nuria Llombart
Professor on Quasi-Optical Systems
Fellow of the IEEE
Microelectronics Department
TU Delft, The Netherlands
27 April 2021
Dear Valery,
First, I would like to thank you for the THz banpass filters that we have bought from your company. They are working very well!
Thank you very much,
Yours sincerely,
Ing. Matej Jurkovič
Junior Researcher
ELI BEAMLINES
Dolní Břežany, Czech Republic
9 March 2021
Dear Anton,
We are happy with the quality of your lenses.
Kind regards,
Victoria Nasserddine
TiHive SAS
Grenoble, France
2 March 2021
Dear Valery,
I got your contact from a colleague of mine. Some say that Tydex is one of the best in making complex shape parabolic optics. I have a job for you on this regard.
Looking forward to reading from you soon.
Best regards,
Remigijus Šliupas
OPTOMAN
Vilnius, Lithuania
1 March 2021
Dear Vladimir,
please provide us with the invoice for ... pcs of protection windows and the second invoice for ... pcs of protection windows according to the attached drawing.
We are familiar with the highest quality of your glasses during the previous order (as we did a check at the Bauman Moscow State Technical University).
Best regards,
Sergey Shirokov
Design engineer
scientific and production enterprise SAM, LLC
Moscow, Russia
20 January 2021
Dear Vladimir,
Thank you for the information!
I am sending you a photo of your mirrors in work (76.2 mm). This is so-called Herriott multi-pass cuvette. Everything works perfectly.
Best regards,
Artem Klimchuk
BO-ENERGO, LLC
Moscow, Russia
16 September 2020
Dear Anton,
I received the HRFZ-Si meniscus lenses today. They look excellent.
Thank you.
Dr. J. Michael Klopf
HZDR (Helmholtz-Zentrum Dresden-Rossendorf)
Dresden, Germany
5 August 2020
Dear Grigory and Andrey,
Thank you for your efforts. It was a pleasure working with you.
Hope to work with you again in the future.
Thank you.
Warmest regards,
Shawn Khuhan
Sales Engineer
SIMTRUM PTE. LTD.
Singapore
24 July 2020
Dear Mr. Miazin,
we are quite happy with the new TYDEX polarizers!
I would like to order 4 more pieces. Could you please send me updated offer?
Thank you,
Premysl Marsik
Department of Physics
Faculty of Science and Medicine
University of Fribourg
Fribourg, Switzerland
11 June 2020
Dear Vladimir,
Dear Valery,
I ordered glass KU-1 size 120x50x10 from you. It was received at the
end of March. I recently tried it. The glass is excellent and meets
my needs. I would like to order more glasses.
Best regards,
Alexander Morozov
The Central Aerohydrodynamic Institute
Zhukovsky, Moscow Region
Russia
17 May 2020
Dear Mr. Kropotov,
Thank you for your fast delivery of the ordered 100 lenses.
We would like to place another order for 200 lenses.
We are pleased about the continued and productive cooperation.
Best regards from Germany,
Ansgar Menke
Maico-Mannesmann Dynamics GmbH
tera.engineering
Schweringen, Germany
12 May 2020
Dear Vladimir!
Thank you for the glasses! We have received everything.
Quickly and efficiently! It's nice to work with you!
Yours faithfully!
Andrey Kozin
Head of IR/UV Equipment Department
TEPLO-VEST, LLC
Moscow, Russia
29 March 2020
Dear Valery,
Last Wednesday we received mirrors*.
Thank for your wonderful work!
Regards,
Elijah J. H. Kim
CEO
SL LAB, INC
Seoul, Korea
__________________________
* Tydex supplied a main mirror (concave hyperbolic mirror with Dout=1230mm), a secondary mirror (convex hyperbolic mirror with Dout=400mm) and a 2-lenses optical corrector for telescope Astera1200 by SLLAB INC. Location: Gwangju National Science Museum, Gwangju City, South Korea.
1 February 2020
Dear Anton,
I received CaF2 window that you selected specifically for me (for IR temperature sensor in experimental vacuum installation). The quality is excellent. Thank you very much.
Yours faithfully,
Igor Malakhov
Radio engineer
Russia
25 September 2019
Dear Valery,
The THz bandpass and lowpass filters we recently ordered work nicely, thank you!
Best,
Yannic Behovits
Terahertz Physics Group
Freie Universität Berlin
Germany
11 July 2019
Dear Madison,
I found Vladimir (Kopchatov) to be exceptionally knowledgeable and patient as I scrutinized pictures of TYDEX's as grown sapphire tubing and competitor's from around the world for optical clarity. I found competitors that were close in price but had opaque tubing and competitors that were in the same magnitude of optical clarity were 2 to 4 times more expensive. I found TYDEX's best competition to have about half the optical clarity. As can be seen by the pictures, text is legible through both tubing walls, as competitors only achieve this same optical clarity through a single wall.
I found the optical clarity of TYDEX'S as grown sapphire tubing to outweigh the cost benefits of a polished tubing for my application.
I'm very satisfied with the service and as grown sapphire tubing that I received.
Matthew Evans
Mechanical Engineer
Saint Paul, Canada
P.S. Madison Hetlage, PhD Student of Texas A&M University
8 April 2019
Dear Vladimir!
We got your glasses, were satisfied with them, and would like to buy seven more of the same.
Best regards,
Shakhotin Vladimir A.
Engeneer
ETRA-specavtomatika, LLC
Novosibirsk, Russia
2 April 2019
Vladimir,
The tubing looks to be of excellent quality. I am very happy with your superior craftsmanship. Competitor products didn't even come close in an as grown state.
Regards,
Matthew Evans
Mechanical Engineer
Saint Paul, Canada
22 February 2019
Ekaterina,
I confirm receiving the package with two axicons.
They look very nice, no visible defects.
I am impressed that you were able to make those axicons so quickly: almost no time between receiving our order and the shipment day!
Andrei Sirenko,
Professor at the Department of Physics, Chair
New Jersey Institute of Technology
NJ, USA
13 November 2018
Good afternoon Valery,
Today, I’ve received the optical mirror, what a beauty … Thank you!
Best regards,
Slawomir Porczyk
International Precision Products BV
The Netherlands
23 July 2018
Dear Ekaterina,
we recently used the axicons for transmission experiments in the 0.1 THz - 2 THz spectral range.
They demonstrate excellent performance - exactly what we expected from our ZEMAX simulations.
Thank you very much for this excellent product.
Andrei Sirenko,
Professor at the Department of Physics, Chair
New Jersey Institute of Technology
NJ, USA
2 May 2018
Dear Mrs. Kostenko,
in the past I ordered an off-axis parabolic mirror from your company and you helped me greatly...
Again, thank you very much for this. Your mirror has performed very nicely in our experiment so far and my colleagues and I are quite happy with it.
Christian Werle,
University of Hamburg
Institute for Experimental Physics
Accelerator Physics Division
Hamburg, Germany
12 April 2018
Dear Valery!
We ordered two pieces of THz bandpass filters before from you and it works very well. We'd like to order another piece.
Xu Yang,
Research Associate
Iowa State University of Science and Technology
Ames, Iowa
USA
20 November 2017
Vladimir, we installed the lens. We are, as always, happy with the result, thank you!
Alexander Karuzin
RIF, LLT
St. Petersburg, RUSSIA
18 September 2017
Hello Vladimir,
we are very satisfied with the quality of the windows.
Tal Roth,
Third Eye Systems ltd.
ISRAEL
22 June 2017
Dear Alexander!
Our OAP mirrors are succesfully working for CIAO in Chile, and now we
are already working for next projects.
Javier Moreno-Ventas
Max-Planck-Institut für Astronomie Instrumentation
Heidelberg, Germany
16 September 2016
Hello, Valery!
Thank You very much, we are very pleased with the quality of the mirrors.
Yours faithfully,
Ekaterina Migal
Lomonosov Moscow State University (MSU)
16 September 2016
I want also to tell you that we are very happy with Tydex lenses and Golay cell we have from you. Sure in the close future (maybe days) I will order other lens (I am dealing this topic with your colleague Aleksandr.)
Yours,
Prof. Dr. Enrique Garcia
University Carlos III of Madrid
31 August 2016
Vladimir,
Yes, everything is fine. Your Quartz Windows are very good quality.
Yours faithfully,
Olga Kurbakova
3 May 2016
Vladimir,
We are able to assemble our final product, could you please advise which side of the window has the DLC coating and which has the BBAR? I see on side of the window has a purple colour, while the other is more of a reflective silver.
Thank you,
Matthew Colleen
Mechanical Engineer
OEM
Australia
23 March 2016
Since we are very happy with the coating of the parabolic mirrors (and the mirrors themselves of course) we would like to know if you also offer coating plane mirror substrates.
Best regards,Max Gilljohann
Fakultät für Physik der LMU München
Germany
07 December 2015
I prepared and installed the reducer in the telescope in the Tien Shan Astronomical Observatory (Kazakhstan). All works wonderful. It flattens all colors in spectrum and gives a good resolution.
Thank you.
Best regards,
Maksim Kruglov
ТОО "AP-Group plus"
Almaty
Kazakhstan
18 November 2015
As the year passed I managed to use the instrument > in different conditions and in different places. Once again I would like to thank you. I am 100% happy!
01 July 2015
We are using the OAP since a few months now and are very happy with its performance - as happy as I was with earlier purchases as well. We would like to buy another two of the same OAPs. Could you please update the quotation?
USA
24 March 2015
As you know we are operating a number of Tydex manufactured OAP mirrors at our Ti:Sapphire high power laser and as the quality has always been excellent I would like to ask you if you could also provide focusing optics for our second laser project.
28 January 2015
Could I please get a quote for the Golay Cell that we previously purchased from you (the one with the TPX window GC-1T). We are extremely happy with the Golay Cell we purchased from you and intend to upgrade our older Golay with another Tydex one.
8 August 2014
Here is another article where we cited your OAP mirror and company. I am doing this because of the high-quality OAP you provided.
China
8 August 2014
Hi Ekaterina,
We bought a silicon 1% attenuator from you in June and have been happy with it.
Now we're looking for something similar but with higher attenuation (around 0.1% transmission).
Does Tydex offer that?
Thank you,
Director of Instrument Production
Innovative laboratory services and instrument production
Charlottesville, VA
USA
14 April 2014
I must congratulate you on the quality of Golay cell that I used in Metu Physics; it is very reliable, yields strong signal, and it is student-robust.
Asc. Prof. Dr. Asaf B. Sahin
Electrical and Electronics Eng Dept
Yildirim Beyazit University
Ankara
Turkey
29 January 2014
I'd like to have a quote about POL-HDPE-CA20-OD25.4-T2.5 THz-Polarizer including shipping costs to Germany. The last 2 polarizers are of very good quality!
Thomas Maag
Institute of Experimental and Applied Physics
Kiel
Germany
13 December 2013
Dear Ekaterina,
We are very happy with your Silicon lenses. We would need another set of 10 highly resistive silicon lenses. Can you send me a quote?Christian Damm
Technical University Darmstadt
Germany
5 December 2012
Reviewer comment on paper of our employees:
Terahertz polarization conversion with quartz waveplate sets
A. K. Kaveev, G. I. Kropotov, E. V. Tsygankova, I. A. Tzibizov…
The paper will be published in the Applied Optics journal.
Reviewer comment was sent by Topical Editor Hans-Peter Loock.
Achromatic polarization device for visible or IR is an old topic. However, terahertz with so broad wavelength range, attracts me.
Achromatic waveplates or converters for this band are much more difficult to realize. Everyone knows linearly polarized Thz wave can be generated simply by using wire grid polarizer on Thz-transparent substrate, but for circular, or even radial polarization, we must use Thz achromatic waveplate, which is badly lacking at present. The manuscript demonstrates the results of calculation and experimental test of Thz AWP.
I have to say it's a great paper! The manuscript is of great importance to the Thz people and written clearly. My conclusion is: Accepted as it is.
25 May 2012
Dear Alexander,
today the two mirrors arrived here in excellent condition.
They were extremely well packaged and they look very good.
Thanks very much for the good work!!
Dr. Wolfgang Steinbrecht
Deutscher Wetterdienst - German Weather Service
Hohenpeissenberg
Germany
25 April 2012
Hello Alexander,
Thank you very much for the very good mirror substrates arrived yesterday. I hope the next order about the bigger one can be placed soon.
Best regards,
Stefan
Working group leader
Optical Spectrometry
Leibniz Institute for Analytical Sciences (ISAS) - e.V.
Berlin
Germany
25 January 2012
Dear Vladimir,
We have received your parcel.
The quality of BaF2 windows is excellent for all characteristics (parallelism, roughness, dimensions accuracy and material).
Thanks!
Best regards,
Director of Laser Spectrum Detectors Manufacture
Novosibirsk
Russia
17 January 2012
Hello Valery,
Thank you very much for the data you sent me.
Really good THz BP filters! We have already 2 or 3 your filters.
They work very well.
Best Regards,
Victor Pogrebnyak, PhD
Adjunct Associate Professor
State University of New York
Buffalo, NY
USA
19 October 2011
Dear Ekaterina,
We have been using the quartz windows and are very happy with them,
so I have just placed an order for 6 more.
Best regards,
Dr Richard Dudley
Principal Research Scientist
National Physical Laboratory
UK
May 6, 2011
Dear Ekaterina,
Thank you for your detailed reply!
It is evident that you at Tydex combine very well the business with the science. <…>
With best regards to you and your colleagues at TYDEX,
H. D. Hristov
Assoc. Research Professor
UTFSM (Federico Santa María Technical University)
Valparaíso
Chile
November 11, 2010
Hello, Vladimir!
The windows are perfect. The customers are satisfied.
Usually I give your contacts to let them know where to order.
I have already given your contact information to foreign partners as sometimes they find it difficult to make delivery of one or another optical product.
In the nearest future we are going to place several orders.
Looking forward to working with you!
Best regards,
Ivan
OEM
Moscow
Russia
November 10, 2010
Hello, Vladimir!
I am writing to thank you for the mirrors you have manufactured for us.
The mirrors totally answer the specification, the quality is very good.
Thanks a lot to you and your company.
Best regards,
Tatiana
--
Tatiana Razumikhina
Scientist
Vaughan, Ontario
Canada
October 15, 2010
Let me tell you that we are very satisfied with the performance of your OAPs - we can reach focus values those are close to optimum...
The coatings are observed to be very stable too - over 3 years we are working with the first OAP in our 150 TW laser.
Dr. habil. Ulrich Schramm
FZ Dresden-Rossendorf (FZD), FWKT
Dresden
Germany
September 20, 2010
Dear Vladimir,
I received the wedged windows on Friday 17th September, thank you.
They fit perfectly and seem to work well at eliminating many of our troublesome internal reflections…
Thank you also Elena for the excellent packaging and shipment details, this is much appreciated.
If I or any of my colleagues need custom sapphire windows in the future I will be sure to recommend TYDEX!
Thank you again,
Roger
--
Dr. Roger Buckingham
University of Southampton
UK
September 6, 2010
Hi Vladimir,
I have now copied the drawing and laser spec to Alexander.
Thank you for your help. I wish all suppliers were as reliable as Tydex!
Best regards,
Peter Hall
PSM
UK
November 16, 2009
Dear Vladimir,
Wow! That is very impressive!
Do you have a shipping number so that I can track them?
Very many thanks for your excellent support.
Warmest Regards,
Peter Hall
PSM
UK
November 6, 2009
Dear Valery!
Thank you very much for your wonderful answers for my questions.
I admire you for your responsible attitude to my questions;
especially you made some experiments especially for me.
I would like to tell you that your clear answers made me understand the Golay cell and TPX.
As your forecast, I have some new questions (attached to this email) to trouble you to give me some advice.
Thank you and your colleagues again for your enthusiasm to my questions!
Best wishes for you all!
Yours sincerely
Lijie
--
Lijie Gunn
Harbin Institute of Technology
China
October 19, 2009
(this is a message from the forum at www.astronomy.ru)
I was contacting the company.
I got quick responses to my questions
and what is more important all responses were expert and correct.
I appreciate the manner of communicating with potential client.
This company proved to be strong and responsible to the clients.
Nick name Ysdanko
--
Y.S. Danko
Tyumen State University Russia
July 23, 2009
Dear Valery,
Thanks for your prompt response. This was very helpful to me.
I tried the test you suggested and I could confirm that your detector is working as expected.
I am actually quite impressed how sensitive your opto-acoustic instrument is...
Now that I am convinced that the Golay detector works as specified
I'll have to focus on the THz generation device.
Thanks again.
Best regards,
Harald
--
Dr. Harald Guenther
Vice President
Photonic Products
Monmouth Junction, NJ
USA
July 16, 2009
Dear Alexander,
Your web site is very good and your products are of high quality.
Sometimes we buy optics and components from St. Petersburg where we have friendly ties.
I made a request from your web site for off-axis parabolic mirrors of different focus distances and diameters…
Best regards,
Nikolay Sinyavsky
Semiconductor Physics Institute
Vilnius
Lithuania
April 13, 2009
Parabolic mirror is more expensive than spherical mirror, but it is also much better in collimation.
We would like to order one piece for the collimation on bench.
First, it will get rid of half wavefront error and give a better beam spot shape for every chord.
Second, it gives us a chance to compare the difference between the parabolic and spherical mirrors.
This should be helpful for future upgrade to more chords.
Both price and delivery time from Tydex are better than the others I could find.
Best regards,
Peng Xu
MIT
Cambridge, MA
USA
February 9, 2009
All other specs are fine; we have been working with our 250mm focal length parabola now for quite a while and are very happy with the performance and the stability of the coating.
Best regards,
Dr. Ulrich Schramm
FZD
Dresden
Germany
May 17, 2008
Dear Alexander,
I was away from the lab for a while and just back on Monday.
I was able to review your offer and the price is not so attractive but
honestly I don't know if there is another company that is able to do
such parabola.
As I appreciate the good work you have done with the parabola you
provided us, among all the optics company I know I would prefer to work
with you.
Regards,
Sylvain Fourmaux
Universite du Quebec
Quebec
Canada
April 10, 2008
Hi Denis,
Thank you very much for manufacturing the silicon prisms for us.
They work really well, and our research is advancing quickly thanks to your
efforts in getting them to us so expeditiously!
Best regards,
Moyra
--
Moyra K. Mc Manus
IBM
USA
March 28, 2008
Hi Vladimir,
Yes, we received the parts and installed them (coating type 1) in
our system. They work quite well and we are happy to see that they match our requirements.
I appreciate your efforts for delivering the parts so fast. Thank you, Vladimir!
Best regards,
Ivan
------
Iván Cámara Mayorga
Max Planck Institut für Radioastronomie
Bonn
Germany
February 20, 2008
Dear Sir or Madam,
we plan to setup a high intensity laser physics experiment at the Institute for Optics and Quantum Electronics in Jena/Germany. It is almost similar to an experiment which was done last year at Max-Born-Institute in Berlin with two off-axis mirrors from you.
They recommend your firm and we want to buy two similar off-axis parabolic mirrors.
Thanks in advance.
Sincerely,
Christian Roedel
Institute of Optics and Quantum Electronics
Jena
Germany
November 6, 2007
Notch filter was received last week.
I tested it - it's OK.
Thank you very much for your job.
Best regards,
Mikhail Kantor
Ioffe Physical-Technical Institute of Russian Academy of Sciences
Russia
April 14, 2007
We have been quite happy with the Si lenses Tydex has provided us in the past. We need to order some new ones similar to ordered previously.
Erich Grossman
National Institute of Standards and Technology
Boulder, CO
USA
October 30, 2007
Thank you for your prompt reply.
Yes, we are very satisfied with the HRFZ-Si windows you already provided us.
Many thanks and many greetings,
Florian
--
Dr. Florian Formanek
Sony Corporation
Tokyo
Japan
October 16, 2006
We received the two mirrors on our PO last week.
They were expertly packed, and the report paperwork included was excellent.
I have inspected the mirrors and their coatings, and report that they are very good.
Overall, we have been very impressed with the workmanship, the correspondence, and the excellent service from Tydex.
Thank you and we look forward to working with you on other projects.
Gabe Bloxham
Australian National University
Australia
September 28, 2006
From other customers I have heard that you have fast delivery time
and good quality products which make you an attractive supplier.
Best regards,
Simona
--
Dr. Simona M. Cristescu
Radboud University Nijmegen
Nijmegen
The Netherlands
August 10, 2006
Dear Alex,
My visit to the production facility and my discussions with you and
Grigory were very useful. I have reported to LIGO that Tydex is a
valuable source for off-axis parabolic mirrors.
Sincerely,
Mike
--
Michael R. Smith
California Institute of Technology
Pasadena, CA
USA
April 6, 2006
We have bought a mid-infrared polarizer from you last year and we
were quite satisfied.
Thank you and best regards,
Guilherme Temporao
University of Geneva
Switzerland
February 13, 2006
On Friday the notch-filter arrived and we are very happy with it, although it had a little smear in the gelatin. But this won't affect the great performance of the filter. Thank you very much. With the bigger aperture angle, we are now ready to collect more light, and that's the thing we wanted. And the mount fits perfectly. It's marvelous.
Best regards to Russia. It was a pleasure to work with professionals.
Peter Fischer
Heinrich-Heine-Universität
Düsseldorf
Germany
February 9, 2004
As we got our last order now and we are really satisfied with the quality of
ZnSe ATR-prisms, I would like to ask you for a new offer.
We are also interested in buying hemispherical ATR-prisms for the use in the
"seagull"-unit of Harrick.
Thank you in advance and the best wishes,
Dr. Britta Rossenbeck
MPI for Iron Research
Düsseldorf
Germany
Optics is ready to be shipped!
Optics Stock
Shipment/ Payment/ Warranty ...
