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최소 단어 이상 선택하여야 합니다.
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선택한 단어 수는 30입니다.
최대 10 단어까지만 선택 가능합니다.
최대 10 단어까지만 선택 가능합니다.
제안 방법
- Figure 1 presents a block diagram of the HOE for a waveguide type HMD. In the proposed method, the HOEs act as diffractive elements to guide the light in certain angles. Thus, the plane wave from the lens is diffracted by the first HOE, and propagated by the total internal reflection inside the wave guide plate.
- This means that the system has good color uniformity and brightness performance. The proposed method can reduce the volume of the system. Furthermore, simplified fabrication and high diffraction efficiency are also advantages in this system.
- This paper extends the previous work to full color HOE analysis. The asymmetric geometry of the reflection gratings in the photopolymer was also analyzed.
- One of the most important points of the system is that it can provide full color images. This study evaluated the efficiency using three structures of the full color HOE. First, a HOE was recorded by simultaneously illuminating the three lasers in a single photopolymer as shown in Fig.
- The HOEs act as the couple-in and couple-out optics in the waveguide-type HMD. To implement the system, the optical characteristics of the photopolymer were analyzed using three lasers operated at 473, 532, and 633nm, respectively. The diffraction efficiencies of the photopolymer were more than 90% for each R, G and B color.
- To overcome the abovementioned problems, this paper proposes a reflection-type HOE with high diffraction efficiency for a waveguide-type HMD using a photopolymer. A photopolymer is one of the hologram recording materials that has high diffraction efficiency and low cost.
대상 데이터
- Figure 8 shows the experimental setup for recording a full color HOE. Three laser wavelengths, 633 nm (red), 532 nm (green), and 473 nm (blue), were selected. The laser beam used for recording was switched by the shutter placed in front of it.
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