Optical Surfaces Ltd has launched a new low profile mounting system that offers a highly stable platform for smaller diameter (up to 75mm) parallel or wedge backed off-axis parabolic (OAP) mirrors. The OAP mirrors specialist is now able to supply smaller diameter OAP mirrors pre-aligned in the new high quality stress-free mount.
Unlike standard parabolic mirrors, off-axis parabolic mirrors direct and focus incident collimated light at a specific angle, allowing unrestricted access to the focal point as well as reducing the size and minimising the weight of an optical design
Optical Surfaces is able to routinely produce OAP mirrors with surface accuracy to lambda/20 (peak-to-valley) depending upon off-axis angles. Using proprietary polishing techniques the company can, depending on the surface accuracy required, achieve the natural limit to the off-axis angle of around 25-30 degrees and surface micro-roughness of less than 1 nm. A range of coatings is available for standard and custom components from metallic with or without protective overcoat to multilayer dielectrics and ultra-hard coatings.