This paper describes a new class of recording materials for volume holograms suitable for commercial applications. These next generation holographic photopolymers have combine the ability to satisfy the unmet demand for color and depth tuning that is only possible with volume holograms with compatibility to industrial mass-production processes. Unlike earlier holographic photopolymers, these new materials offer the advantages of no chemical or thermal processing combined with low shrinkage and detuning. Furthermore, these materials offer a high resolution of more than 5000 lines/mm and are environmentally robust. Bayer MaterialScience plans to commercialize these materials in 2010. In this paper, we describe the attributes of this new class of photopolymers, relate their ease of use in holographic recording, and discuss potential applications of such materials.
The 3D displays that reproduce high-density light-rays, such as a holographic stereogram, are able to render the angular-dependent reflection property of 3D objects. It is expected to enable the realistic display of surface textures and glosses. In this paper, full-parallax holographic stereograms are synthesized from glossy object, and the reproducibility of glosses is evaluated. As a result, it is confirmed that the surface textures and glosses, which change their appearance dependent on the viewing direction, are well reproduced by the full-parallax holographic stereograms recorded from the multi-view images of real objects.
To making the hologram is not so easy to output the calculated result as a hologram that must have micron order resolution for practical three-dimensional display. We are developing a fringe printer. This report before, it panel size 14.5mm×10.9mm, resolution 1400×1050pixel, pixel pitch 10.4μm of Liquid Crystal on Silicon use reduced to 1/12 and made a hologram. In this report, panel size 13.8mm x 7.56mm, resolution 1400 x 1050 pixel, pixel pitch 7μm of Liquid Crystal on Silicon use reduced to 13/150 and made a hologram. It aims at high-finely and high-resolution.
Digital holographic microscopy (DHM) is a well-known powerful method, which allows both the amplitude and phase of a specimen to be simultaneously observed. Using the feature, we study a new real-time digital holographic microscopy observable in multi-view and arbitrary resolution.
We have proposed the holographic display technique to enlarge the image size and the viewing zone angle of a hologram. A high-speed spatial light modulator (SLM) is used to display a vertically long image by an anamorphic imaging system, and this image is scanned horizontally by a galvano scanner. In this study, the undesirable light, such as conjugate image, zero-th order light, and higher-order diffraction images, is eliminated. The single-sideband method is introduced. A vertical slit and a horizontal split are placed on the vertical and horizontal Fourier planes, respectively. We experimentally demonstrated the generation of hologram images without the undesirable light.
As the first step to the electronic holography generation from 2D image plus depth map, Horizontal Parallax Only (HPO) hologram generation was investigated. As occlusion is perceived only in one direction, when Single-Side-Band (SSB) method for unnecessary light elimination is applied to HPO hologram, stereo cameras can pave the hidden surface. With this method, simple high speed electronic holography generation is experimentally confirmed. This approach can be extended to full-parallax holography.
Holography is the technology to re-create 3-D objects exactly. To realize ultra-realistic communications, we aim at creating a real-time holographic movie system which captures 3-D objects such as human beings under natural light, and displays them by electronic holography. Actually, we consider using integral photography as capturing method and Fast Fourier transform for generating their hologram. We have developed the system that equipped (1) a lens array with 118x66 lenses and a camera with 1920x1080 pixels to capture the 3-D objects, (2) two general PCs to generate their hologram, and (3) a liquid crystal display and a He-Ne laser to display them. Our previous system worked in 10 fps; this system works in real time, i.e. in 30 fps.