Holograms have many unique features and functions. We have been developing several new products by fusing hologram technology. In Holo-Table, by synchronously projecting the parallax image on the rotational holographic scanning plate, we succeeded in displaying the stereoscopic image that can be observed from 360 degrees. In Holo- Window, we are developing brand-new building-integrated photovoltaic (BIPV) system by simply pastes a hologram film on the window. Hologram film is guiding sunlight to the inside of the window glass and leads it to a small solar cell that generates electricity. In this paper, we introduce more examples of our product developments applied by hologram technology.
A Head-mounted displays (HMD) for augmented reality (AR) are researched to use work support. However, it has a fatigue problem occurred by the difference of focal length between the working space and displayed image. The technique of displaying holography using an electronic device called electro-holography are expected to solve the problem, because it is possible to display images at a free depth depending on the working position. So that, holographic HMDs for AR have been studied. But, since it is consisting optical components such as lenses, a mirror and a half mirror, the size and weight of the devise become large and heavy. On the other hand, holographic optical elements (HOE) is possible to produce functions of lens, beam splitter and diffraction grating. Also, it is possible to consolidate the functions of lenses and half mirrors into HOE. In this paper, we purpose near-eye holographic display device using HOE (Egarim-PBS made by Egarim Co., Ltd.). The Egarim-PBS is consolidated the functions of lenses, half mirrors, and optical waveguide, which are all optical components to construct the holographic HMD. So that, we can perform a simpler optical structure which is only consists of an Egarim-PBS and electronic devices. Our proposed concept was proven by experimentally. The proposed system has a potential to make holographic HMD became smaller and lighter than a conventional holographic HMD.
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