Optical processing
An optical processing system is described that allows rapid evaluation of derivatives and partial derivatives by means of optical Fourier transformation. In embodiments, separate filtering steps are used to provide phase and amplitude changes.
1. A device for calculating derivatives of a variable, comprising:
a display configured to display an input function, an optical device configured to provide an optical Fourier transform of light from the input function, a spatial light modulation system configured to display a representation of a complex filter function, the spatial light modulation system being disposed to receive the optical Fourier transform of light from the input function, a second optical device configured to receive the product of the optical Fourier transform of light from the input function and the filter function to provide an intensity distribution, and a sensor for providing data indicative of the intensity distribution wherein the display and the spatial light modulation system comprise a single spatial light modulator.
2. The device of claim 1 , wherein the spatial light modulation system has a phase-only component and an intensity-only component.
3. The device of claim 1 , having operating circuitry for providing a two-dimensional distribution across the spatial light modulation system.