5-inch high-resolution aerial display by use of retro-reflector and a Fresnel lens

• Published in: Proceedings of SPIE, the international society for optical engineering Vol. 13389; pp. 1338905 - 1338905-6
• Main Authors: Takiyama, Kazuaki, Iwane, Toru, Suyama, Shiro, Masaoka, Kenichiro, Yamamoto, Hirotsugu
• Format: Conference Proceeding
• Language: English
• Published: SPIE 01.01.2025

Aerial displays form real images in mid-air and realize a non-contact user-interface. However, the aerial images are significantly blurred compared to the light source images due to ray shift, diffraction spread, and scattered light by the optical elements. Lens-enhanced aerial imaging by retro-refl...