Micro-mirror device and optical pick-up system of the same

A micro-mirror device comprising:

• a substrate;
• a piezoelectric actuator on the substrate adapted to deform according to an external control signal;
• a beam splitting mirror for fine adjusting a position of an incident light, and reflecting a portion of the light and transmitting the other portion of the light;
• a transparent supporter beneath the beam splitting mirror for supporting the beam splitting mirror;
• a connecting hinge connected to the piezoelectric actuator and the transparent supporter for transferring a deformation of the piezoelectric actuator to the transparent supporter for shifting the beam splitting mirror;
• and,
• an optical detector on the substrate under the beam splitting mirror for sensing the light transmitted through the beam splitting mirror.

An optical pick up system of a micro-mirror device comprising:

• a light source module for emitting a light;
• a first and a second focusing parts for focusing the light emitted from the light source module onto a surface of an optical recording medium;
• and,
• the micro-mirror device between the first and second focusing parts for fine adjustment of a position of the light incident through the first focusing part, reflecting to the optical recording medium through the second focusing part, sensing the light re-reflected at the optical recording medium, and converting into an electrical signal.