Holographic Imaging Solutions

Research Papers

Comparison of hardware and software implementations for the computer generated hologram calculation for LCD micro displays and applications using holographic optical tweezers

Authors: C. Heßeling 1,2, C. Denz 1, A. Hermerschmidt 2

1 Institute of Applied Physics and Center for Nonlinear Science, Westfälische Wilhelms-Universität Münster

2 HOLOEYE Photonics AG, Albert-Einstein-Straße 14, 12489 Berlin, Germany

Abstract: The use of computer-generated holograms for generating light patterns follows on from increased calculation speed and simplified experimental use of spatial light modulators using pure phase modulation in the form of reflective LCOS micro displays. Using the example of holographic optical tweezers, we have implemented the Gerchberg-Saxton, Fienup and other algorithms in software using PC hardware. Implementations based on the FFTW library, using only the CPU, are compared to programs written in Cn, running on a ClearSpeed accelerator card. For quality analysis, the calculated holograms are displayed on a light modulator and the diffraction efficiencies of the generated optical beam components are measured.

Speed-up of hologram generation using ClearSpeed Accelerator board

Noriyuki Tanabea, Yasuyuki Ichihashia, Hirotaka Nakayamaa, Nobuyuki Masudaa and Tomoyoshi Ito Graduate School of Engineering, Chiba University, Chiba 263-0034, Japan

Outcome: We have sped up the calculation of a computer-generated hologram by parallel computing using ClearSpeed AdvanceTM Dual CSX600 PCI-X Accelerator Board by ClearSpeed Technology plc. By using two boards in parallel, our system was able to perform the calculation 50 times as fast as a personal computer.