Bakış-noktası izleyicili, interaktif, geniş görüş-açılı, ikili-odak-düzlemli artırılmış gerçeklik ekranı

Stereoscopic displays have a fixed focus plane and they suffer from visual discomfort due to the mismatch between the focus and vergence of the eyes, known as the vergence-accommodation conflict (VAC). VAC is unavoidable in conventional stereoscopic head-mounted displays (HMDs). In this thesis research, I proposed a biocular (i.e, common optics for two eyes), two focal-plane based augmented reality (AR) system with real-time gaze tracker, which provides a novel interactive experience. Two separate liquid crystal displays (LCDs) are placed at slightly different distances to a Fresnel relay lens such that virtual images of LCDs appear at 25 cm and 50 cm to the user. Both LCDs are totally viewed by both eyes. While the system is limited to two depths and discontinuity occurs in the virtual scene, it provides correct focus cues and natural blur effect at the corresponding depths. This allows the user to distinguish virtual information through the accommodative response of the eye, even when the virtual objects overlap and partially occlude in the axial direction. Displays are driven by a single computer and the objects in the virtual scene are distributed over the LCDs according to their depths. Furthermore, a road scene simulation is realized as a convenient use-case of the proposed display so that a large monitor is used to create a background scene and the rendered content in the LCDs is augmented into the background. Field-of-view (FOV) is 60 x 36 degrees and the eye-box is larger than 100 mm, which is comfortable enough for two-eye viewing. The system includes a pupil and gaze tracker, which is implemented with a single camera and using computer vision algorithms. The gaze tracker, which is experimented on different users, is able to select the correct depth plane based on the shift in the interpupillary distance when the convergence angle of the user's eyes changes. The rendered content can be distributed to both depth planes and the background scene simultaneously. Thus, the user can select and interact with the content at the correct depth in a natural and comfortable way. The prototype system can be used in tasks that demand wide FOV and multiple focal planes and as an AR and vision research tool.