Industrial Technology Research Institute

Li-Ding Wei

Hsiao-Wen Lee

Shih-Yi Wen

Chieh Hu

Chau-Yuan Ke

Ming-Feng Ho

A wire-suspended objective lens actuator structure and a method of assigning current pathways. The lens holder on the actuator structure has a group of focusing coils, a group of tracking coils and a group of slant adjustment coils. The coils are connected to four conductive wires. A first conductive wire controls the focusing coil and a second conductive wire controls the tracking coil. Similarly, a third conductive wire controls the slant adjustment coil. The ground terminals of all three groups of coils are connected in parallel to a fourth conductive wire. The fourth conductive wire serves as a common ground terminal. The control terminal of each group of coils is connected to a differential voltage-output current amplifier circuit or a differential voltage-output voltage amplifier circuit. Hence, the focusing, the tracking and the slant adjustment coils can be driven by differential voltages.

Wire-suspended objective lens actuator structure and method of assigning current pathways thereto

An optical switch is disclosed. A lock magnetic field is provided on the sides of a rotator with a magnetic surface. The magnetic field has a potential with two minima as reflective and non-reflective positions. At the reflective position, the reflective mirror on the rotator reflects light beams. The beam goes through when the rotator is at the non-reflective position. At the same time, the magnetic field firmly locks the rotator at its position. When a driving force is imposed on the rotator; it rotates from its current position to the other position and gets locked at the new position.

Optical switch

A folding mirror structure comprises a folding mirror, a piezoelectric film and electrodes attached to the surfaces of the piezoelectric film. The folding mirror is used for deflecting a laser beam. The piezoelectric film and electrodes are stacked in an interleaving manner and attached to the folding mirror. The surfaces of the electrodes have particular patterns for compensating the coma aberrations due to the tilt of an optical disc.

Growing community of inventors

Taipei, Taiwan

Li-Ding Wei