Data reading and writing apparatuses and data reading and writing methods

A data writing apparatus, comprising:

• an optical signal generator, configured to generate an optical signal;
• a plurality of optical modulators, wherein each of the plurality of optical modulators is configured to receive the optical signal, and modulate the optical signal based on to-be-stored data to obtain a plurality of modulated signals;
• and
• an optical head array, comprising a plurality of laser heads, wherein each of the plurality of laser heads comprises a plurality of focal points;
• the plurality of laser heads is configured to receive a plurality of modulated signals sent by the plurality of optical modulators, and respectively control on/off of a plurality of corresponding focal points based on the received plurality of modulated signals, to write the to-be-stored data in parallel into an optical storage medium;
• and one laser head receives a plurality of modulated signals sent by one optical modulator;
• a motion platform, configured to place the optical storage medium;
• and
• a motion controller, connected to the motion platform, and configured to control, based on a storage address corresponding to the to-be-stored data, the optical storage medium to move in a first direction or a second direction on a plane on which the optical storage medium is located, wherein the first direction is perpendicular to the second direction.

A data reading method, performed by a data reading apparatus, wherein the data reading apparatus comprises an optical signal generator, an optical head array, and a processing system, and the method comprises:

• generating, by the optical signal generator, an optical signal, wherein
• the optical head array comprises a plurality of laser heads, each of the plurality of laser heads comprises a plurality of focal points, and the plurality of laser heads is configured to receive the optical signal, and apply the optical signal to a plurality of data points of an optical storage medium by using the plurality of focal points of each laser head in the plurality of laser heads, to obtain a plurality of data signals;
• and
• receiving, by the processing system, the plurality of data signals, and processing the plurality of data signals to obtain to-be-read data,
• wherein the data reading apparatus further comprises a motion controller and a motion platform configured to place the optical storage medium, and the method further comprises:
• controlling, by the motion controller based on a storage address of the data, the optical storage medium to move in a first direction or a second direction on a plane on which the optical storage medium is located, wherein the first direction is perpendicular to the second direction.

A data writing method, performed by a data writing apparatus, wherein the data writing apparatus comprises an optical signal generator, a plurality of optical modulators, and an optical head array, and the method comprises:

• generating, by the optical signal generator, an optical signal, wherein
• each of the plurality of optical modulators receives the optical signal, and modulates the optical signal based on to-be-stored data to obtain a plurality of modulated signals;
• and
• the optical head array comprises a plurality of laser heads;
• each of the plurality of laser heads comprises a plurality of focal points;
• the plurality of laser heads is configured to receive a plurality of modulated signals sent by the plurality of optical modulators, and respectively control on/off of a plurality of corresponding focal points based on the received plurality of modulated signals, to write the to-be-stored data in parallel into an optical storage medium;
• and one laser head receives a plurality of modulated signals sent by one optical modulator,
• wherein the data writing apparatus further comprises a motion controller, and a motion platform configured to place the optical storage medium, and the method further comprises:
• controlling, by the motion controller based on a storage address corresponding to the to-be-stored data, the optical storage medium to move in a first direction or a second direction on a plane on which the optical storage medium is located, wherein the first direction is perpendicular to the second direction.