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JRM Vol.33 No.5 pp. 1155-1168
doi: 10.20965/jrm.2021.p1155
(2021)

Paper:

Geometric Correction Method Applying the Holographic Ray Direction Control Technology

Kenta Tanaka*, Motoyasu Sano*, Yumi Horimai**, Hideyoshi Horimai***, and Yusuke Aoki*

*National Institute of Technology, Numazu College
3600 Ooka, Numazu, Shizuoka 410-8501, Japan

**Shape in Space LLC
591-17 Kawaharagaya, Mishima, Shizuoka 411-0022, Japan

***HolyMine Corp.
591-17 Kawaharagaya, Mishima, Shizuoka 411-0022, Japan

Received:
February 26, 2021
Accepted:
June 16, 2021
Published:
October 20, 2021
Keywords:
hologram, holographic surface projector, geometric correction method, MEMS, 3D-object shape measurement
Abstract
Geometric Correction Method Applying the Holographic Ray Direction Control Technology

Holographic-geometric-correction for complex shapes

In recent years, there has been an increasing need for larger screens and higher definition displays, while projectors are becoming smaller and cheaper. Furthermore, an ultra-short-throw projector that can display on a large screen while significantly reducing the distance between the projector and screen is being developed. However, ultra-short-throw projectors are required to be precisely aligned with the screen, and if the screen is not flat, the projected image becomes distorted. Therefore, geometric correction projection technology is attracting attention for projection on curtains and the walls of living rooms instead of screens for realizing the correction of distortion during projection with ultra-short-throw projectors, projection mapping, signage, etc. We focused on developing a hologram with perfect command of the ray. Conventional geometry-correction systems are expensive systems that require a personal computer and a camera. In this study, we developed a geometric correction method applying holographic ray direction control technology to control a holographic ray at a low cost and in real time. In this paper, we studied the exposure technology and proposed a ray-direction control technology that combines a scanning laser projector that uses a hologram and a micro electro mechanical systems mirror. We also proposed and demonstrated the basic principle of a holographic surface projector (HSP), which uses hologram geometry correction technology. Finally, we constructed a geometrically corrected hologram exposure system using a depth camera and conducted geometrically corrected projection experiments.

Cite this article as:
Kenta Tanaka, Motoyasu Sano, Yumi Horimai, Hideyoshi Horimai, and Yusuke Aoki, “Geometric Correction Method Applying the Holographic Ray Direction Control Technology,” J. Robot. Mechatron., Vol.33, No.5, pp. 1155-1168, 2021.
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Last updated on Nov. 30, 2021