Optical disc having layers corresponding to different colors and sensitive to optical beam wavelengths

An optical disc drive comprising:

• an optical mechanism capable of emitting optical beams of different wavelengths onto an optical disc having a plurality of stacked layers each corresponding to a different color and uniquely sensitive to a particular wavelength;
• and,
• a controller to cause the optical mechanism to selectively emit an optical beam of the corresponding particular wavelength for each layer of the optical disc to sufficiently heat the layer so as to cause a region of the layer impinged by the optical beam to change from at least substantially translucent to the color to which the layer corresponds.

An optical disc drive comprising:

• first means for emitting optical beams of different wavelengths onto an optical disc having a plurality of stacked layers corresponding to different colors;
• and,
• second means for causing the first means to selectively emit an optical beam of a different wavelength for each layer of the optical disc to which the layer is uniquely sensitive to sufficiently heat the layer to cause the layer to change from at least substantially translucent to the color to which the layer corresponds where the optical beam impinges.

A computer-readable medium having a computer program stored thereon comprising:

• a first computer program part to cause an optical mechanism to move relative to a surface of an optical disc having a plurality of stacked layers corresponding to different colors, while the optical disc is rotating;
• and,
• a second computer program part to cause the optical mechanism, for each layer of the optical disc, to selectively emit an optical beam onto the optical disc that has a wavelength to which the layer is uniquely sensitive so as to cause the layer to change from at least substantially translucent to the color to which the layer corresponds where the optical beam impinges the optical disc.