Where to buy mirror substrates; BK7, fused silica, sapphire, Zerodur, surface quality, optical quality, thermal properties, manufacturers and suppliers
- ️Dr. Rüdiger Paschotta
- ️Fri Mar 28 2025
Buying Mirror Substrates
Top-level product categories: 
materials, 
optical components and devices
Related product category: mirrors
Mirror substrates, used in the production of dielectric and metal-coated mirrors, can be made from materials like BK7 glass, quartz glass (fused silica), sapphire, and Zerodur. Important properties include surface quality, optical transmission quality, thermal conductivity, and thermal expansion coefficients.
Making Good Purchase Decisions
As the most professional photonics purchasing portal, RP Photonics helps you to not only to find all relevant suppliers (not limited to our advertisers), but also to make good purchasing decisions.
NEW: Structured Decision Process
Purchasing involves a lot of responsibility. We recommend that you apply best practice by using the following structured process: Go through the following expandable sections, complete the form and finally come to a purchase decision. You can then print that to a PDF for documenting the process.
Our article on best practices for purchasing and another one explaining this tool give you valuable insights.
1. Understand the technical background
It is important to sufficiently understand the technology before buying.
Use the comprehensive learning resources of RP Photonics:
If you need personal help, contact RP Photonics to get technical consultancy.
2. Define your requirements
It is essential to fully understand and clearly define your requirements before you buy.
We recommend that you develop a list of clear specifications according to your specific needs, against which you can later check the suitability of found product offers:
To help you, we have already listed some aspects we recommend you consider when buying mirror substrates. Of course, there may be other aspects that are relevant to your specific case.
This list is for your own preparation, and can later (possibly in modified form) be used for quotation requests to suppliers.
Otherwise, you will need to talk to your technical colleagues.
If you cannot sufficiently clarify your requirements, you may want to get technical consultancy from RP Photonics.
You find these buttons in the supplier list below or under "3. Find suitable suppliers".
3. Find suitable suppliers
We suggest three steps:
- Below, you can find our list of suppliers for mirror substrates. Use the checkboxes to mark possibly suitable suppliers.
- The selected suppliers will appear below this list, along with your list of specifications. You can then indicate which specifications they meet according to your research. (You should finalize your specifications before doing this.)
- Based on the results, you can finally choose a supplier that is hopefully a good enough fit.
Selected suppliers:
(none so far)
Decision
The most suitable supplier you found:
Comments, e.g. reasons for your choice, or things which still need to be checked:
19 suppliers for mirror substrates are listed in the RP Photonics Buyer's Guide, out of which 3 present their product descriptions. Both manufacturers and distributors can be registered.
 The Future Depends on Optics Edmund Optics101 East Gloucester Pike Barrington, NJ 08007 United States See us at OPIE 25 in Pacifico Yokohama, Japan, April 23–25 (booth F-32), SPIE Defense + Commercial Sensing in Orlando (FL), USA, April 13–17 (booth 917), CLEO 25 in Long Beach (CA), USA, May 4–9 (booth 317), Automate 25 in Detroit (MI), USA, May 12–15 (booth 4400), SPS Italia in Parma, Italy, May 13–15 (hall 5, booth 055) and LASER World of Photonics 2025 in Munich, June 24–27 (booth B1.416)! |  TECHSPEC® laser mirror substrates are manufactured from high quality fused silica and are designed for use with high power laser sources. These mirrors feature excellent surface specifications, including λ/10 surface flatness and 10-5 surface quality, to limit the possibility of reduced performance due to surface defects. The high surface quality of these mirror blanks also makes them ideal for use in demanding intra-cavity laser applications. Product-specific web page |
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