Real-time computer generated hologram (cgh) generation by compute unified device architecture (cuda)-open-gl for adaptive beam steering

An adaptive beam steering system, comprising:

• a camera arrangement configured to detect at least one object of interest in a region of interest (ROI) located in an image of a scene;
• an optical source for generating an optical beam;
• a phase spatial light modulator (phase-SLM) being arranged to receive the optical beam;
• and
• a graphical processing unit (GPU) being configured to determine a computer generated hologram (CGH) phase pattern to be applied to an optical beam by the phase-SLM to scan the optical beam over the ROI by diffractive beam steering, wherein the GPU is further configured to determine the CGH phase pattern using a CGH calculation algorithm that is executed in parallel for each of the pixels, wherein the determining includes determining the CGH phase pattern on a pixel-by-pixel-basis by assigning a phase value to each pixel in the phase-SLM based on the equation:
• ϕ(x, y, a, b)=mod {[2π(xa+yb)], 2π}, where ϕ is the phase value, (x,y) represents a position of the pixel, and (a, b) represents a diffraction angle measured from a 0th order diffraction from the phase-SLM and mod (2π(xa+yb), 2π) represents a modulo 2π operation on a value 2π(xa+yb), the GPU being further configured to cause the CGH phase pattern to be displayed on the phase-SLM while the optical beam is being directed on the phase-SLM to thereby steer the optical beam to the ROI.