| Patent Number |
Title Of Patent |
Date Issued |
| 6330209 |
Load and unload control for magneto-optical disk drive |
December 11, 2001 |
| An apparatus for reading/writing data from/to a magnetic disk comprises an objective lens disposed in an actuator body for focusing laser light onto the magnetic disk. A magnetic head suspension assembly includes a magnetic recording head attached to the actuator body, a suspension arm h |
| 6324130 |
Disc drive suspension and head |
November 27, 2001 |
| A magneto-optical (MO) disc drive including a novel suspension, slider body, airbearing surface, and magnetic head. The MO disc drive includes a fine-focus actuator block including an objective lens, wherein the coarse carriage block moves radially above a surface of an MO disc to positi |
| 6256267 |
Method for reading and writing magneto-optical media |
July 3, 2001 |
| A method of using laser light to access a magneto-optical disc utilizes first and second objective lenses, the second objective lens being mounted in a light channel of a slider having a primary planar surface that flies over the surface of the magneto-optical disc. The laser light is di |
| 6172945 |
Double-sided magneto-optical recording disk |
January 9, 2001 |
| A magneto-optical disc is described. The magneto-optical disc comprises a substrate and a magneto-optical recording layer applied over the substrate. The magneto-optical disc further comprises an overcoat layer applied over the recording layer having a thickness in a range between 25 |
| 6172944 |
Magneto-optical recording apparatus with magnetic head decoupled from objective lens focus actua |
January 9, 2001 |
| A method and apparatus for reading from and writing to a magneto-optical disc. The apparatus comprises a first objective lens situated between a first side of the magneto-optical disc and a first source of a laser light. The apparatus further comprises a first flying magnetic head si |
| 6104675 |
Method and apparatus for reading and writing magneto-optical media |
August 15, 2000 |
| A method and apparatus for magneto-optical storage and access of data. The apparatus comprises a flying magnetic head, wherein the flying magnetic head comprises: a slider that flies over a magneto-optical disc during read and write operations performed on a magneto-optical disc; a magne |
| 5703865 |
Method and apparatus for magneto-optical recording and reading using optimized laser powers |
December 30, 1997 |
| A magneto-optical (MO) disk drive. In one embodiment, the MO disk drive comprises a drive controller that controls operation of a laser source and a disk drive mechanism. The drive controller comprises a microprocessor and a memory subsystem coupled to the microprocessor. The memory subs |
| 5541908 |
Actuator having a minimized payload in a optical recording system |
July 30, 1996 |
| An optical recording system having a routing prism and an objective lens bonded together with a slider to form an integrated unit. A slider is attached to the end of an arm of a rotary actuator. Housed within the slider is a prism and an objective lens. The prism directs a laser beam |
| 5422872 |
Telecentric rotary actuator in an optical recording system |
June 6, 1995 |
| A telecentric rotary actuary in an optical storage system. A laser generates a laser beam which is focused by an objective lens onto an optical disk in order to write data to and read data from the optical disk. In performing a seek, a galvo rotates a mirror in order to reflect the l |
| 5396479 |
Apparatus and method for setting a threshold level to maintain duty cycle in a pulse width modul |
March 7, 1995 |
| An apparatus for setting a threshold voltage for determining bit positions of digital data stored on an optical recording device utilizing pulse width modulation. The optical recording device reads a pattern from an optical medium. The read pattern has a fixed, known duty cycle. A feedba |
| 5355356 |
Charge pump for restoring DC in an optical recording read channel |
October 11, 1994 |
| An optical recording system having a DC restored read signal for qualifying pulses in the read channel. The equalized and filtered read signal is input to a differentiator and a DC restore circuit. The zero crossings of the differentiated signal which represent the peaks of the pulses ar |
| 5341360 |
Method and apparatus for calibrating laser write power by averaging upper and lower knees of a c |
August 23, 1994 |
| In an optical recording system employing a laser for writing digital data onto a storage medium, an apparatus and method for calibrating a laser to a power level which minimizes write errors. A calibration profile is generated by writing test data patterns onto the storage medium by usin |
| 5307337 |
Optical disk drive having a low-emission high-bandwidth laser driver |
April 26, 1994 |
| An optical recording system having a laser for generating a light beam to write data to and read data from a storage medium, an RF modulator for modulating the laser to improve its stability, and an apparatus for driving the laser. The apparatus is comprised of a transistor coupled to |
| 5303220 |
Compressed air optical drive cleaning cartridge |
April 12, 1994 |
| An apparatus and method for cleaning components internal to an optical recording system without requiring the optical recording system to be disassembled. The apparatus is comprised of inlets through which pressurized gas is fed. The pressurized gas is directed through channels withi |
| 5297115 |
Detection of saved sectors on an optical disk |
March 22, 1994 |
| In an optical disk drive system, an apparatus and method for determining whether data read from a particular field within a particular sector of an optical disk corresponds to a code which specifies that the sector should not be erased. A crystal clock generates a synthesized clock signa |
| 5210726 |
Track seek method utilizing an ideal signal |
May 11, 1993 |
| A track seek method for a disk drive system. In the seek method of the present invention, the head is moved according to the characteristics of an ideal, electronically generated signal which is independent from data read off the disk. By varying the characteristics of the ideal signal, |
| 4980876 |
Single stage track seek method |
December 25, 1990 |
| A seek method for disk drive is described. In the seek method of the present invention, the tracking servo loop remains in a track positioning mode throughout the entire seek process. By effectively varying the reference position of the head with respect to track center under a prede |
