COMPUTER-GENERATED HOLOGRAPHIC DIFFUSER FOR COLOR MIXING

An iterative algorithm for multiple incoming wavelengths is proposed t o design a computer-generated holographic diffuser with the features o f high light utilization efficiency and uniform color mixing. The ampl itude transmittance of this computer-generated holographic diffuser is constant, while the phase transmittance consists of multiple phase le vels. This diffuser is designed according to the Fraunhofer diffractio n theory and can uniformly spread the different input light at the sam e time. The simulation results show that over 88% average far field am plitude transmission efficiency is achieved for each input light and t he output uniformity is within 12.4%. (C) 1998 Elsevier Science B.V. A ll rights reserved.