Our customers are saying about Tydex optics:
9 July 2021
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.
Space sciences, Technologies and Astrophysics Research (STAR)
The University of Liège
1 July 2021
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.
Professor on Quasi-Optical Systems
Fellow of the IEEE
TU Delft, The Netherlands
27 April 2021
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,
Ing. Matej Jurkovič
Dolní Břežany, Czech Republic
9 March 2021
We are happy with the quality of your lenses.
2 March 2021
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.
1 March 2021
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).
scientific and production enterprise SAM, LLC
20 January 2021
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.
16 September 2020
I received the HRFZ-Si meniscus lenses today. They look excellent.
Dr. J. Michael Klopf
HZDR (Helmholtz-Zentrum Dresden-Rossendorf)
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.
SIMTRUM PTE. LTD.
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?
Department of Physics
Faculty of Science and Medicine
University of Fribourg
11 June 2020
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.
The Central Aerohydrodynamic Institute
Zhukovsky, Moscow Region
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,
Maico-Mannesmann Dynamics GmbH
12 May 2020
Thank you for the glasses! We have received everything.
Quickly and efficiently! It's nice to work with you!
Head of IR/UV Equipment Department
29 March 2020
Last Wednesday we received mirrors*.
Thank for your wonderful work!
Elijah J. H. Kim
SL LAB, INC
* 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
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.
25 September 2019
The THz bandpass and lowpass filters we recently ordered work nicely, thank you!
Terahertz Physics Group
Freie Universität Berlin
11 July 2019
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.
Saint Paul, Canada
P.S. Madison Hetlage, PhD Student of Texas A&M University
8 April 2019
We got your glasses, were satisfied with them, and would like to buy seven more of the same.
Shakhotin Vladimir A.
2 April 2019
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.
Saint Paul, Canada
22 February 2019
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!
Professor at the Department of Physics, Chair
New Jersey Institute of Technology
13 November 2018
Good afternoon Valery,
Today, I’ve received the optical mirror, what a beauty … Thank you!
International Precision Products BV
23 July 2018
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.
Professor at the Department of Physics, Chair
New Jersey Institute of Technology
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.
University of Hamburg
Institute for Experimental Physics
Accelerator Physics Division
12 April 2018
We ordered two pieces of THz bandpass filters before from you and it works very well. We'd like to order another piece.
Iowa State University of Science and Technology
20 November 2017
Vladimir, we installed the lens. We are, as always, happy with the result, thank you!
St. Petersburg, RUSSIA
18 September 2017
we are very satisfied with the quality of the windows.
Third Eye Systems ltd.
22 June 2017
Our OAP mirrors are succesfully working for CIAO in Chile, and now we
are already working for next projects.
Max-Planck-Institut für Astronomie Instrumentation
16 September 2016
Thank You very much, we are very pleased with the quality of the mirrors.
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.)
Prof. Dr. Enrique Garcia
University Carlos III of Madrid
31 August 2016
Yes, everything is fine. Your Quartz Windows are very good quality.
3 May 2016
23 March 2016
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.
ТОО "AP-Group plus"
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?
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
8 August 2014
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?
Director of Instrument Production
Innovative laboratory services and instrument production
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
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!
Institute of Experimental and Applied Physics
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?
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
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
25 April 2012
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.
Working group leader
Leibniz Institute for Analytical Sciences (ISAS) - e.V.
25 January 2012
We have received your parcel.
The quality of BaF2 windows is excellent for all characteristics (parallelism, roughness, dimensions accuracy and material).
Director of Laser Spectrum Detectors Manufacture
17 January 2012
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.
Victor Pogrebnyak, PhD
Adjunct Associate Professor
State University of New York
19 October 2011
We have been using the quartz windows and are very happy with them,
so I have just placed an order for 6 more.
Dr Richard Dudley
Principal Research Scientist
National Physical Laboratory
May 6, 2011
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)
November 11, 2010
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!
November 10, 2010
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.
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
September 20, 2010
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,
Dr. Roger Buckingham
University of Southampton
September 6, 2010
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!
November 16, 2009
Wow! That is very impressive!
Do you have a shipping number so that I can track them?
Very many thanks for your excellent support.
November 6, 2009
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!
Harbin Institute of Technology
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
Tyumen State University Russia
July 23, 2009
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.
Dr. Harald Guenther
Monmouth Junction, NJ
July 16, 2009
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…
Semiconductor Physics Institute
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.
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.
Dr. Ulrich Schramm
May 17, 2008
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
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
Universite du Quebec
April 10, 2008
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!
Moyra K. Mc Manus
March 28, 2008
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!
Iván Cámara Mayorga
Max Planck Institut für Radioastronomie
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.
Institute of Optics and Quantum Electronics
November 6, 2007
Notch filter was received last week.
I tested it - it's OK.
Thank you very much for your job.
Ioffe Physical-Technical Institute of Russian Academy of Sciences
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.
National Institute of Standards and Technology
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,
Dr. Florian Formanek
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.
Australian National University
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.
Dr. Simona M. Cristescu
Radboud University Nijmegen
August 10, 2006
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.
Michael R. Smith
California Institute of Technology
April 6, 2006
We have bought a mid-infrared polarizer from you last year and we
were quite satisfied.
Thank you and best regards,
University of Geneva
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.
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