Optical system for diffusing light

An optical system for diffusing reflected light from the surface of media having image information comprising:

• a first optical element for diffracting light;
• a second optical element which diffuses the diffracted light from said first optical element wherein said first optical element has first and second sides in which said second side faces said second optical element, in which said second optical element has a power spectrum and said first optical element has a diffraction period selected in accordance with said power spectrum of said second optical element;
• media located adjacent said first side of the first optical element in which said media has a surface reflecting light received through said first and second optical element to said first and second optical elements to provide diffused reflected light from said second optical element.

An optical system for diffusing light received by the system, said system comprising:

• first means for diffracting the illumination to provide a plurality of diffraction angular orders;
• and
• second means for diffusing the diffracted illumination at one or more of the diffraction angular orders in which said first means has a diffraction period selected in accordance with the power spectrum of said second means.

A system for diffusing electromagnetic signals in the spectrum of radio waves through x-rays comprising a cascade of a diffraction grating and a diffuser, in which said grating diffracts the signals and said diffuser diffuses the diffracted signals from said grating, and said diffraction grating has a period selected in accordance with the power spectrum of said diffuser.

A method for diffusing light comprising the steps of:

• diffracting light to provide a plurality of diffraction angular orders having an angular separation;
• and
• diffusing the diffracted light in accordance with a power spectrum of diffusion at one or more of the diffraction angular orders in which said angular separation is selected in accordance with the power spectrum.