Hello! We are trying to design a micro-mirror with a deflection angle of 40 to 45 degree. However, if we use torsion hinge, the stress of the hinge at 45 degree exceeds the yield strength of most materials. I wonder whether you have any suggestion about what materials and what hinge types are best suitable for this kind of application. Your help would be greatly appreciated. Rose Zhang Photonics Materials & Processes Nationa Optics Institute 369 rue Franquet, Ste-Foy Que, Canada Tel: (418)657-7406x506 Fax:(418)657-7009