Hidetoshi Katsuma

Holographic television by liquid-crystal device

In the past, the transmission of holograms via television was executed but no holographic TV was realized because there was no suitable recording material. Now a 3-D TV is expected, and recent research on real time holography using a high-resolution liquid crystal device (LCD) is active. In this research we consider the possibility of holographic television and construct the best system possible with commercially available devices. First, holographic fringe patterns for moving objects are made with TV cameras. Then the hologram pattern is transformed to electrical signals and transmitted within the TV frequency band. Finally, the hologram fringe pattern is displayed on the LCD and the 3-D image is reconstructed. In this research, we used the moving object and considered its characteristics. The filtering method was used to improve S/N of the reconstructed image and to extend the viewing angle.

Electronic display system using LCD, laser diode, and holography camera

We have presented the experiments about the cineholography constructed with the many element holograms which were made with cw laser and holographic-TV using LD LCD and holography camera. The interference fringes with holography camera were recorded on the CCD of TV-camera. The fringe signals were transferred into electronic ones. And transformed into the LCD, the fringes were constructed on the one. At this time, with the help of LD, the panel of LCD were illuminated and so hologram was reconstructed in the LCD at real time.

Holography for physics education in universities and colleges

Fundamental experiment of holographic memory was carried out for university students to understand thebasic concept of the memory as a large format storge method of next generation. We performed holographic data recording experiment using simple two beam optical systems. Multiple recording to enhance storage capacity was also successfully performed.

Multi-imaging hologram for physics education in university and college

Fundamental experiments of multiple image recording were carried out for university students to understand the basic concept of the 3D image storage. We performed holographic image recording experiments using simple two beam interference. Multiple image recording of 2D and 3D was successfully performed.

Holography for physics education using a simple optical setup

This paper introduced one method of physics education in universities and colleges to make use of making holograms in classroom. The procedures, we proposed in this paper, are so simple that it is realized easily to make holograms. To construct holography accessible to universities and colleges, cost, safety, simplicity, scientific content, and usefulness are primary requirements.

Optical characterization of BGO and BSO film for image recording

Silver halide photographic plates and photo-polymers have been utilized for the holographic recording. These materials are available only for recording of still pictures, and require complex developing process and relatively long time for recording and reproduction of the image. As an alterative, image recording using bismuth sillenite compound has been researched. The BGO and BSO single crystal bulk samples have been sued for these studies. On such background, we aimed to fabricate BGO and BSO films for image recording. Thin films have merits in device integration and mass production. We have already found out the process condition to obtain good crystalline BGO films on glass substrates. The film with crystalline phase only was obtained at the substrate temperatures above 200 degrees C. In this paper, BGO and BSO films were deposited on glass substrates and the ITO conducting films on the glass substrates using RF magnetron sputtering method. Preliminary image recording experiments were carried out for a BSO single crystal and its film. Image recording properties were characterized for the polycrystalline films with different film thickness by recording interference fringes using the Ar ion laser.

Fabrication of BGO and BSO films for image recording

Silver halide photographic plates and photosensitive polymers have been utilized for the holographic recording. These materials are available only for recording of still pictures and require complex developing processes and a relatively long time for recording and reproduction of the image. As an alternative, image recording using bismuth silenite compounds has been researched. The BSO and BGO single crystal bulk samples have been used for these studies. We aimed to fabricate BGO and BSO films appropriate for image recording. Films have merits in device integration and mass production. The process condition to obtain a good crystalline film was studied. The film with crystalline phase only was obtained at the substrate temperatures above 200C.

Holography for physics education

This report describes the physics education at Tama art university and Tokai university (Japan) for using display holography. More than 30 years ago, we started this program of physics education. At the first step, students visited the holography exhibition and were making holograms, within 1.5 hours, by means of the hand-made holography camera using a simple optical set-up. The electro holography was useful for the students to understand the basic theory of holography absolutely.

Many problems in recording biomedical properties by means of holography

In this paper we discuss the use of holography for recording biomedical properties. A holographic stereogram, system holography camera, and holographic television are presented for this purpose

Problems in recording important cultural assets by means of holography

This paper describes a holography camera for making many art treasures into holograms, cineholography, and holographic television (real-time electro holography).