Optical Surfaces can typically produce off-axis parabolic mirrors up to 600mm in diameter with surface accuracy to lambda/20p-v, depending upon off-axis angles.
With proprietary polishing techniques, Optical Surfaces can, depending on the surface accuracy required, achieve the natural limit to the off-axis angle of around 25-30deg and surface micro-roughness on aspherics of ~1nm rms.
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.
Applications include high-power laser focusing, focusing on astronomical objects, collimating reference wavefronts, beam expansion, MTF measurement, MRTD testing and bore sight alignment for missile-guidance systems.
Parabolic mirrors are the most common type of aspheric used in optical instruments.
They are free from spherical aberrations and thus focus a parallel beam to a point or a point source to infinity.
Off-axis parabolic mirrors provide an unobstructed aperture, allowing complete access to the focal region as well as reducing the size and minimising the weight of a design.
They are especially suitable for broadband or multiple wavelength applications due to their completely achromatic performance.
Production is approved to ISO 9001-2000.
The quality of off-axis parabolic mirrors from Optical Surfaces is ensured using a range of interferometric and surface test measurements on all optics and optical systems leaving the factory.
