Precision Tool Technologies, Inc.

Perfect Surface is an air accumulator that absorbs the back pressure caused during fining and polishing. The result is improved surface quality and reduced surfacing times. The secret to Perfect Surface is constant line pressures. Conventional polishing maintains even line pressure on spherical and near-spherical lens curves. With lenses of increasing cylinder and diopter, oscillation increases. This (back) pressure differential causes the lens to bounce and skip reducing lapidary efficiency and surfacing quality. This can be shown by attaching a pressure gage assembly (see gage assembly below) which will show deviations of up to 50% of the operating pressure (actual results on a 10 base with a 13.50 cross). When this occurs, the take off is greater in the center of the lens than on the outside of the lens. With Perfect Surface, pressures remain constant with both spherical and cylinder polishing motions.