| Patent application number | Description | Published |
|---|
| 20080304395 | Air Gap Servo For Optical Recording - A device reads and/or records marks in a track on a record carrier via near field optical recording. The device has a head including a lens to be positioned at a near field distance from a surface of the record carrier. An air gap controller is for controlling an air gap ( | 12-11-2008 |
| 20090115429 | Simultaneous Detection of In-Plane and Out-Of-Plane Position Displacement With Capacitive Sensors - An apparatus includes a first capacitive sensor connected to a first supply voltage, a second capacitive sensor connected to a second supply voltage, a sensing circuit for producing a sense voltage in response to current flowing in the first and second capacitive sensors, a first mixer for combining the sense voltage with a first reference voltage to produce a first signal representative of in-plane displacement between electrodes of the first and second capacitive sensors, and a second mixer for combining the sense voltage with a second reference voltage to produce a second signal representative of out-of-plane displacement between the electrodes of the first and second capacitive sensors. | 05-07-2009 |
| 20100157760 | OPTICAL STORAGE MEDIUM WITH LIMITED ACCESS - The present invention relates to an optical storage medium ( | 06-24-2010 |
| 20100177429 | Readback Signal-Based Head-Disc Contact Detection Using AM/FM Demodulation - A method includes: producing a readback signal using a recording head positioned adjacent to a recording medium, amplitude demodulating the readback signal to produce an amplitude demodulated signal, frequency demodulating the readback signal to produce a frequency demodulated signal, and using the amplitude demodulated signal and the frequency demodulated signal to determine contact of the recording head with the recording medium. An apparatus that can be used to implement the method is also provided. | 07-15-2010 |
