[19a-Z28-1~9] 3.3 Information photonics and image engineering

[19a-Z28-4] Aberration-corrected-polarization Fresnel lens optimized for aerial image optical system using a polarization grating

〇Kazunari Ashikawa¹, Moritsugu Sakamoto¹, Kohei Noda¹, Tomoyuki Sasaki¹, Yoshichika Tanaka², Takeya Sakai², Yukitoshi Hattori², Nobuhiro Kawatsuki³, Hiroshi Ono¹ (1.Nagaoka Univ. of Tech., 2.Hayashi Telempu Corp., Ltd, 3.Univ. of Hyogo)

Keywords:Diffractive Optical Element, Polarization, Liquid Crystal

We are studying an aerial image display optical system that uses a polarizing diffraction grating and retroreflection. This optical system has very high light utilization efficiency because it reflects and emits light by total reflection and brewer angle. In addition, a polarized Fresnel lens and a λ / 4 plate can form an image larger than the light source in the air. However, the optical system is asymmetrical and distortion occurs in the aerial image. Therefore, we examined a polarized Fresnel lens that enlarges the aerial image and corrects the distortion of the image.