System and method for bitwise readout holographic ROM

A method for manufacturing a holographic storage medium comprising:

• providing one or more data masks with data to be recorded on a holographic storage medium;
• propagating a plane wave object beam and reference beam from a laser light source operating at a first range of record wavelengths;
• illuminating the one or more data masks onto the holographic storage medium with the object beam;
• propagating the reference beam at fixed incident angle to the holographic storage media to record the one or more data masks on the holographic storage media;
• altering the record wavelength of the object beam and reference beam for each of the one or more data masks, wherein each of the one or more data masks recorded on said holographic storage medium can be read bit by bit using a laser light source operating in a readout range of angles different from the first range of record angles.

A method for reading an optical storage medium comprising:

• propagating a readout beam from a laser light source to an optical storage medium;
• identifying an optical storage medium type of the optical storage medium as a holographic storage device or other type of optical storage medium;
• propagating the readout beam from the optical storage medium to a lens with an adjustable focal length;
• adjusting the focal length of the lens depending on the optical storage medium type;
• and
• focussing the readout beam onto the detector with the lens.

A system for reading an optical storage medium comprising:

• a laser light source capable of operating at a range of wavelengths for providing a readout beam;
• an objective lens for focussing the readout beam onto an optical storage medium;
• a means for identifying an optical storage medium type of the optical storage medium as a holographic storage device or other type of optical storage medium;
• a detector;
• a lens with an adjustable focal length for focussing the readout beam onto the detector, wherein a focal length controller adjust the focal length of the lens depending on the optical storage medium type.

A system for manufacturing a holographic storage medium comprising:

• a laser light source capable of operating at a record wavelength for providing an object beam and a reference beam;
• one or more data masks, wherein the one or more data masks are illuminated by the object beam;
• a holographic storage medium for recording the one or more data masks, wherein the holographic storage medium is illuminated by the object beam propagating through the one or more data masks;
• a means for altering an incident angle of the reference beam directed at the holographic storage medium,
• wherein each of one or more data masks recorded on said holographic storage device can be read bit by bit using a laser light source operating in a readout range of wavelengths different from the record wavelength.

A method for manufacturing a holographic storage medium comprising:

• providing a holographic master data mask, wherein one or more data masks to be recorded on a holographic storage medium are located within the holographic master data mask;
• illuminating the one or more data masks onto the holographic storage medium with a plane wave object beam from a laser light source operating at a record wavelength;
• propagating a reference beam at an incident angle to the holographic storage medium to record the one or more data masks on the holographic storage medium;
• altering the incident angle of the reference beam for each of the one or more data masks, wherein each of the one or more data masks recorded on said holographic storage medium can be read bit by bit using a laser light source operating in a readout range of wavelengths different from the record wavelength.

A method for manufacturing a holographic storage medium comprising:

• providing a holographic master data mask, wherein one or more data masks to be recorded on a holographic storage medium are located within the holographic master data mask;
• propagating a plane wave object beam and reference beam from a laser light source operating at a first range of record wavelengths;
• illuminating the one or more data masks onto the holographic storage medium with the object beam;
• propagating the reference beam at fixed incident angle to the holographic storage media to record the one or more data masks on the holographic storage media;
• altering the record wavelength of the object beam and reference beam for each of the one or more data masks, wherein each of the one or more data masks recorded on said holographic storage medium can be read bit by bit using a laser light source operating in a readout range of angles different from the first range of record angles.

A method for manufacturing a holographic storage medium comprising:

• providing one or more data masks with data to be recorded on a holographic storage medium;
• propagating a plane wave object beam and a reference beam from a laser light source;
• illuminating the one or more data masks onto the holographic storage medium with the object beam;
• varying the distance of at least the data mask or an image of the data mask from the holographic storage medium to record the one or more data masks on the holographic storage medium, wherein each of the one or more data masks recorded on said holographic storage medium can be confocally readout bit by bit.