Drexler Technology Corporation

Servo Track Writer Corporation

Robert L Hazel

Larry Steven Zurbrick

Gajus Michelson

William W Valliant

A system and method for writing reference information on a recording media contained with a sealed housing utilizes a reflective planar mirror on the rotary actuator controlling the writing mechanism. A narrow beam directed through a window on the side wall of the housing onto the mirror is reflected off at angle dependent on the actuator position to a beam sensitive detector. A translator system driven by a positioner disposed at a distance from the rotary actuator axis which is substantially greater than the distance between the actuator axis and the writing head, is used to vary the relationship between the directed and reflected beams. This system incorporates the rotary actuator in a closed loop servo that positions the actuator precisely at different locations relative to the recording medium, so that the reference information may be written.

Method and apparatus for effecting data transfer with high precision

A data logger which incorporates a laser diode and focusing optics for logging data pits in optical recording media. The focusing optics may be attached to a spring assembly and caused to oscillate by electromagnetic or mechanical means. As the optical elements oscillate, the focused beam dithers above and below the surface of the recording media. When the laser beam focal region is in the plane of the recording surface a pit or deformation is formed in the surface. Relative motion is provided between the recording surface and the laser beam spot for further writing on the recording surface.

Growing community of inventors

Newbury Park, CA, United States of America

Robert L Hazel