Double-sided grinding and polishing, also known as double-sided lapping and polishing is performed with particles suspended in a liquid vehicle to abrade parts equally from both surfaces. The process produces a relatively stress-free environment that induces minimal thermal distortion making it compatible with most optical materials.
The double-sided manufacturing process uses planetary action, with the combination of a top and bottom plate, resulting in outstanding transmitted wavefront error, parallelism, surface quality and surface roughness.
The Lapping and Polishing Experts
Sydor’s polishing operations demand machines and processes of the highest accuracy and stability in the optics manufacturing world. Utilizing the latest advances in lapping and polishing technology, our double-sided polishing processes have been specially developed to allow us to provide the best possible outcomes for optical glass, glass ceramics, filter glass, and optical-grade crystals like sapphire, germanium, and silicon.
Already the industry leader in the processing of flat, parallel glass optics, Sydor has added new capabilities to process sapphire substrates. Sapphire carries its own specific challenges when polishing for optical uses, as it characteristically has extremely high hardness with a low impact strength. Sapphire materials and substrates are very susceptible to stress, and if not handled appropriately, can be damaged easily while being polished, handled, coated or shipped. At Sydor Optics, we understand the intrinsic nature of crystals and have built our processes to ensure that every optic is handled with precise care.