Holographic mode filter for super-resolution imaging

An image reconstructing device for reconstructing an image from an optical imaging system, the image reconstruction device comprising:

• a beamsplitter positioned to receive collimated light from an object viewed by the optical imaging system, and to divide the received light into multiple bands of wavelength;
• multiple sets of diffraction gratings, each coupled to receive respective ones of the multiple bands of wavelength light, each diffraction grating comprising a contrast mask having an amplitude function pattern matched to a point spread function (PSF) of the optical imaging system;
• detectors respectively coupled to receive scattered light from the multiple diffraction gratings;
• multiple pixel arrays coupled to receive light transmitted through respective sets of diffraction gratings;
• and
• a controller coupled to receive pixel data from the multiple pixel arrays and intensity data from the detectors to reconstruct the image the pixel array.

A non-transitory computer readable medium containing instructions that when executed cause at least one processing device to:

• receive collimated light from an optical imaging system;
• divide the received light into multiple bands of wavelength;
• refocus each band onto a corresponding diffraction grating comprising a contrast mask having an amplitude function pattern matched to a point spread function (PSF) of the optical imaging system;
• detect an intensity of light scattered by each diffracting grating;
• transmit light that is not filtered out by each diffraction grating onto a corresponding pixel array;
• and
• reconstruct the image as a function of an average value or total of detected intensity of scattered light and patterns on the pixel arrays for each band.