Open AccessDevelopment of a new scleral contact lens with encapsulated photodetectors for eye tracking
Author(s) -
Loïc Massin,
Vincent Nourrit,
Cyril Lahuec,
Fabrice Seguin,
Laure Adam,
Emmanuel Daniel,
Jean-Louis de Bougrenet de La Tocnaye
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.399823
Subject(s) - eyewear , photodiode , optics , computer science , collimated light , lens (geology) , optical power , photodetector , centroid , computer vision , artificial intelligence , physics , laser
Most eye trackers nowadays are video-based, which allows for a relatively simple and non-invasive approach but also imposes several constraints in terms of necessary computing power and conditions of use (e.g., lighting, spectacles, etc.). We introduce a new eye tracker using a scleral lens equipped with photodiodes and an eyewear with active illumination. The direction of gaze is obtained from the weighted average of photocurrents (centroid) and communicated through an optical link. After discussing the optimum photodiodes configuration (number, layout) and associated lighting (collimated, Lambertian), we present prototypes demonstrating the high performances possibilities (0.11° accuracy when placed on an artificial eye) and wireless optical communication.