Patent ID: 8547426

Claim:
An apparatus configured to micro-scan a fingerprint image, comprising: an image sensor configured to capture fingerprint images; a first actuator; a second actuator; an assembly, the assembly including: a mounting point configured to hold the image sensor, a first mounting region configured to hold the first actuator, a second mounting region configured to hold the second actuator, and a stiffening device coupled to the mounting point, the first actuator, and the second actuator, wherein the stiffening device has a geometry configured to establish the resistance of the mounting point to a force induced by the first actuator configured to produce a linear translation of the mounting point, and to establish the resistance of the mounting point to a force induced by the second actuator configured to produce a linear translation of the mounting point, wherein the linear translation produced by the second actuator is substantially orthogonal to the linear translation produced by the first actuator and wherein the stiffening device is configured to establish a resonant frequency of the assembly; and a control unit configured to drive the first actuator and the second actuator with a drive signal having a selected operational frequency wherein the resonant frequency of the assembly is greater than the selected operational frequency in order to minimize a settle time of the assembly.