The study of three dimensional Modified Gerchberg–Saxton Algorithm used in holographic projection

• Main Authors: Li,Wu-Chun, 李武駿
• Other Authors: Chang,Hsuan-Ting
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/s5nhc7

碩士 === 國立雲林科技大學 === 電機工程系 === 103 === This thesis focuses on the application of optical phase retrieval algorithm on computer generated holography, with modifying Gerchberg-Saxton algorithm through the Fresnel integral formula to retrieve the phase information (Phase only function, POF) in a point –by-point way for the three-dimensional objects. Then the rotation matrix is introduced into Fresnel transform and the light sources from different directions are simulated according to the multi-view perspectives of the object to calculate the computer generated hologram. In the simulation, to prove that the proposed method can encrypt three-dimensional images into the POF, we enter some images, each image has different depth from others. The POF at different planes can be used to reconstruct clear or blurry images corresponding to the various depths. In the optical experiments, the laser light and the SLM are used to project stereoscopic images with different perspectives. By manipulating the directions of the light source in the retrieval process of POF, the interference of the zero-order light can be successfully avoided at the image reconstruction stage. The method proposed is especially effective for the holographic projection application.