Custom on-axis head-mounted eye tracker for 3D active glasses

Currently, no low cost commercial 3D active glasses with embedded eye tracker are available despite the importance of and tracking for numerous applications. In this context, a simple liquid crystal shutters is presented tested orthoptics By using beam splitter to better align camera line sight when subject looks at target in front him far range, new design allows recording high quality images limited pupil deformation compared other trackers where cameras can be from axis (head mounted or fixed). Such could useful various applications virtual reality