Case Study: 1500 – 5000 nm AR 2 Side Sapphire
Data Table |
|
Specification |
Value |
Anti Reflection Range |
1500 – 5000 nm |
Reflection % |
R < 3.0% Per Surface Ave |
Transmission Range |
1500- 5000 nm |
Transmission % |
T% >94.0 % Ave |
No. Sides Coated |
2 Sides |
Substrate |
Sapphire |
Dimensions |
10 x 10 mm |
Thickness |
0.5 mm |
Scratch/Dig |
60/40 |
Quantity Per Year |
50 |

Case Study:
This multi-layer anti-reflection coating was designed for use as a protective cover lens on a Lead Selenide (PbSe) detector. The uncoated sapphire substrate has an uncoated maximum transmission of just over 86% causing significant signal loss for the Lead Selenide detector across its sensitivity range of 1000 – 5200 nm. For this application the customer did not require an AR coating to cover the whole width of the PbSe detectors sensitivity range only 1500 – 5000 nm. The general rule is that the narrower the required transmission range is the lower we can get the reflection level. With this anti-reflection coating we were able to achieve greater than 96.0% average transmission between 1500 – 5000 nm significantly reducing signal loses. Lead Selenide detectors are widely used across the photonics industry in many applications such as gas and flame detection, infrared imaging, environmental monitoring and many more.
This process is one of our standard anti reflection processes, and it is very popular. All of our anti reflection coatings can be adapted and coated onto any substrate with any refractive index, please contact us to discuss the specifics of your requirement.