Optical Flats have a precision polished flat surface used as a reference against which the flatness of a test surface may be compared. We offer single-sided optical flats in materials such as fuse silica, sapphire, Schott, Kopp and Hoya specialty glasses. Additionally, the flats can be enhanced with an aluminum coating to increase contrast and improve the visual reference. Glass Dynamics, LLC is your leading service provider. We have the expertise to help you. If you need assistance please contact us at sales@glassdynamicsllc.com.