Light-Transmissive Data Storage Sandwich

A light-transmissive data storage sandwich apparatus for storing digital data in an optical data storage medium layer, the device comprising:

• a set of monochromatic light sources of preselected wavelengths;
• a diffusing layer, coupled to the set of monochromatic light sources, configured to uniformly distribute light from the light sources;
• a beam directing layer having a rear surface, the beam directing layer coupled to the diffusing layer, configured to redirect light from the diffusing layer in a direction perpendicular to the rear surface;
• a pixel selector layer, having an rear surface, the pixel selector layer coupled to the rear surface of the beam directing layer and configured to define a set of masks that selectively inhibits transmission of light, on a pixel-by-pixel basis, at a wavelength of interest;
• and,
• the optical data storage medium layer applied to output surface of the pixel selector layer.

A light-transmissive data storage sandwich apparatus for reading digital data stored in an optical data storage medium layer, the apparatus comprising:

• a set of light sources of predetermined wavelengths;
• a diffusing layer configured to uniformly distribute light from the light sources;
• an exposed optical data storage medium layer embedding standing waves acting as notch filters;
• a beam directing layer, disposed between the diffusing layer and the optical data storage medium layer, the beam directing layer having a rear surface and configured to redirect light from the diffusing layer in a direction perpendicular to the rear surface, so as to reach the optical data storage medium layer;
• a pixel selector layer which in reading mode is transparent;
• a sensor layer to detect the select pixel locations attenuated by the standing waves.