Simple method for making deeply curved mesh

For the purpose of making deep ellipsoidal stainless steel woven-mesh lenses used in electron optical systems, we have developed some new methods and tools. We succeeded in decreasing the diameter of wires in a simple controlled way in acids just by measuring the time. We used the thermal expansion in our pressing mold to produce a strong pressing force not just at the bottom but in all directions and resulting in good shaped strongly fixed wires. Using these methods, we could make deep ellipsoidal stainless steel woven-mesh lenses, which can be effectively applied in an electrostatic lens system.