Case Study: 532 nm V-Coat N-BK7 Bi Convex

Case Study: Optimising V-Coat Anti-Reflection Coatings for Bi-Convex Focal Lens

When coating onto bi-convex or bi concave lenses it is important to factor the curvature of the lens into the design process. The curvature of the lens affects the angle of incidence at which light interacts with the lens. When designing the coating we optimise it to operate between 0° and the maximum angle that the lens operates at, in this instance 27.5°. We are able to do this through using our design simulation software to compare the performance at 0° and any specified angle. We then measure the coating from a flat witness piece at 0° and use the design simulation software to convert the 0° performance data to the performance at 27.5°. The reason for this is that despite improvements in angular measurement it is still very difficult to get accurate measurements at angle. The graph above shows the 532 nm V-Coat at 0° in red and the performance at 27.5° in blue with greater than 99.5% transmission at 532 nm +/- 1 nm between those operating angles of incidence. We are able to adapt our coatings to any substrate size, shape or refractive index so please contact us to discuss your specific requirements.