RF Plasma Spectacle Lens Manufacturing

The patent replaces conventional mechanical grinding and polishing processes with a chemical etching process using RF plasma. The plasma etching system uses reactive ions to chemically remove material from the lens substrate, forming precise optical surfaces without mechanical contact. This substitution eliminates the need for mechanical master molds and significantly reduces processing time while maintaining or improving surface quality.

The patent employs RF plasma parameters (frequency, power, gas composition, pressure) to control the etching process. By adjusting these parameters, the process achieves precise control over material removal rates and surface morphology, enabling high-precision optical surface formation in minutes rather than hours. The plasma chemistry parameters are optimized to match the lens material properties.

The patent replaces mechanical master molds with a programmable RF plasma etching system. The desired optical surface geometry is defined by process parameters and real-time monitoring rather than physical molds. This eliminates the need for expensive, high-precision master molds while maintaining manufacturing accuracy through digital control of the etching process.

The patent uses digital models and real-time sensor data to guide the plasma etching process, creating optical surfaces based on virtual templates rather than physical copies. The process continuously monitors and adjusts material removal to match the desired optical geometry, eliminating the need for physical master molds that serve as copying templates.

The patent replaces thermal processing with cold plasma processing. The RF plasma modifies coating properties through chemical reactions and physical bombardment by reactive ions and radicals at low temperatures. This achieves precise coating modification (cross-linking, densification, composition control) without the thermal damage that would affect temperature-sensitive lens materials and coatings.

The patent utilizes the unique properties of plasma phase (ionized gas) to deliver reactive species to the coating surface. The plasma state enables chemical modification of the coating through radical reactions and ion bombardment at temperatures far below the material's melting or degradation point, achieving precise modification without thermal damage.

The patent employs continuous RF plasma etching with real-time monitoring and feedback control. The plasma process runs continuously at optimized power and gas flow rates, with sensors monitoring the etching rate and surface quality in real-time. This continuous process with active control maintains high precision while achieving rapid processing, eliminating the need for intermittent mechanical intervention.

The patent incorporates real-time feedback control in the plasma etching process. Sensors monitor the etching rate, plasma parameters, and emerging surface morphology, with the data fed back to adjust process parameters dynamically. This feedback mechanism ensures that even during rapid processing, the optical surface quality remains within specifications by continuously optimizing the etching conditions.