We present a novel foveated imaging system which consists of three major components: a foveated imager, a peripheral
imager, and a 2D scanning sub-system. The foveated imager captures a narrow field of view (FOV) with high angular
resolution to mimic the foveated region of interest (FRoI), and the peripheral imager captures a wide FOV with low
angular resolution to provide the peripheral region for context. The scanning system, implemented with a single-element
two-axis MEMS mirror, is capable of sweeping the FRoI across the entire FOV at a maximum speed of 100Hz. A bench
prototype and experimental results are presented as verifications of our optical design concept and feasibility.
Head-mounted display (HMD) technologies find a variety of applications in the field of 3D virtual and augmented environments, 3D scientific visualization, as well as wearable displays. While most of the current HMDs use head pose to approximate line of sight, we propose to investigate approaches and designs for integrating eye tracking capability into HMDs from a low-level system design perspective and to explore schemes for optimizing system performance. In this paper, we particularly propose to optimize the illumination scheme, which is a critical component in designing an eye tracking-HMD (ET-HMD) integrated system. An optimal design can improve not only eye tracking accuracy, but also robustness. Using LightTools, we present the simulation of a complete eye illumination and imaging system using an eye model along with multiple near infrared LED (IRLED) illuminators and imaging optics, showing the irradiance variation of the different eye structures. The simulation of dark pupil effects along with multiple 1st-order Purkinje images will be presented. A parametric analysis is performed to investigate the relationships between the IRLED configurations and the irradiance distribution at the eye, and a set of optimal configuration parameters is recommended. The analysis will be further refined by actual eye image acquisition and processing.
Conference Committee Involvement (7)
Optical System Alignment, Tolerancing, and Verification XV
18 August 2024 | San Diego, California, United States
Optical System Alignment, Tolerancing, and Verification XIV
21 August 2022 | San Diego, California, United States
Optical System Alignment, Tolerancing, and Verification XIII
24 August 2020 | Online Only, California, United States
Optical Modeling and System Alignment
12 August 2019 | San Diego, California, United States
Optical System Alignment, Tolerancing, and Verification XII
19 August 2018 | San Diego, California, United States
Optical System Alignment, Tolerancing, and Verification XI
6 August 2017 | San Diego, California, United States
Optical System Alignment, Tolerancing, and Verification X
28 August 2016 | San Diego, California, United States
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