Abstract: A mirror transducer substrate apparatus for mounting a light reflecting apparatus has outer walls of nonuniform thickness. The substrate apparatus has a mirror side and a driver side, the mirror side includes an optical surface. The optical surface includes a first trepan formed therein having a first radial dimension. The driver side includes a second trepan formed therein having a second radial dimension which is larger than the first radial dimension. The first and second trepans are structured and arranged to form a nonuniform outer wall integral with the substrate apparatus and a first central post member, integral with the substrate apparatus, having a driver side, a mirror side which is coplanar with the optical surface, and a central axis passing therethrough. A first flexible annular diaphragm area is affixed to the driver side of the substrate apparatus covering the second trepan.

Abstract: A path length control driver apparatus includes a base plate having a first central member having first and second opposite ends, a first outer rim membr and a first flexible annular diaphragm area having first and second opposite sides. The first flexible annular diaphragm area is between and integral with the first central member and the first outer rim member. A central axis passes centrally through the first and second opposite ends of the first central member. A first piezoelectric ceramic material has first and second opposing sides and the first side of the first piezoelectric ceramic material is rigidly affixed to the first flexible annular diaphragm area's first side. A second piezoelectric ceramic material has first and second opposing sides and the first side of the second piezolectric ceramic material is rigidly affixed to the first flexible annular diaphragm area's second side.