[9p-Z10-1~11] 【CS.3】 Code-sharing Session of 3.3 & 4.4

▲ [9p-Z10-10] Evaluation of Image Resolution of Aerial Image Formed with AIRR Based on Slanted Knife Edge Method

〇Ryota Kakinuma¹, Norikazu Kawagishi^1,2, Hirotsugu Yamamoto^1,3 (1.Utsunomiya Univ., 2.Yazaki Corp., 3.JST, ACCEL)

Keywords:aerial image, image resolution, slanted knife edge method

Aerial display, which forms a floating information screen in mid-air, is expected to realize touchless aerial interface that is immune from hygiene issues on pressing a button to operate machines. We have proposed aerial imaging by retro-reflection (AIRR) to form an aerial image that features a wide viewing directional range. AIRR uses a retro-reflector to converge light in mid-air. The sharpness of the aerial image depends on the diffraction patterns of the retro-reflector. The purpose of this paper is to evaluate the image resolution of aerial image by use of the Modulation Transfer Function (MTF). We utilize a slanted knife edge method to measure MTF. We report the difference in MTF of aerial images formed by use of retro-reflectors for sensing and for aerial display. We conducted experiments with two different retro-reflectors and confirmed the difference in MTF curves. The image resolution of the aerial image formed with AIRR was successfully expressed by use of MTF.