Abstract
The resolution-priority holographic stereogram uses spherical waves focusing on the central depth plane (CDP) to reconstruct 3D images. The image resolution near the CDP can be easily enhanced by modifying three parameters: the capturing depth, the pixel size of elemental image and the focal length of lens array. However, the depth range may decrease as a result. In this paper, the resolution characteristics were analyzed in a geometrical imaging model, and three corresponding methods were proposed: a numerical method was proposed to find the proper capturing depth; a partial aperture filtering technique was proposed after reducing pixel size; the moving array lenslet technique was introduced after increasing focal length and partial aperture filtering. Each method can enhance resolution within the total depth range. Simulation and optical experiments were performed to verify the proposed methods.
Highlights
Holography is one of the most promising three-dimensional (3D) display techniques which can reproduce very realistic 3D images with all depth cues
It is usually spatially segmented into many hologram elements, and each hogel is the Fourier transform of the corresponding parallax image
Different from conventional holographic stereogram (HS) which uses multiple plane waves to reproduce light field, the resolution priority HS (RPHS) uses spherical waves focusing on the central depth plane (CDP) to reconstruct 3D images
Summary
Holography is one of the most promising three-dimensional (3D) display techniques which can reproduce very realistic 3D images with all depth cues. The HS is a kind of holographic 3D display based on light field reproduction [6,7] It is usually spatially segmented into many hologram elements (hogels), and each hogel is the Fourier transform of the corresponding parallax image. The RPHS is obtained by adding a quadratic phase term on the conventional FFT of EIs. Different from conventional HS which uses multiple plane waves to reproduce light field, the RPHS uses spherical waves focusing on the central depth plane (CDP) to reconstruct 3D images. After increasing focal length of the lens array for the resolution enhancement near the CDP, partial aperture filtering is used to limit the light ray width, which results in dark gaps. The moving array lenslet technique is introduced to fill in the dark gaps
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
