Optical device for facilitating reading
AssigneesAlbert Le Floch, Universite De Rennes 1
InventorsAlbert Le Floch, Guy Ropars
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Abstract
The invention relates to an optical device (FILT) for filtering light received, by polarisation or mechanically, from a medium presenting a graphic and/or textual content, characterized in that cycles of opening and closing a vision space, in a visible light spectrum, are realized periodically using the optical device (FILT) at a preset frequency Fd and in that the successive open periods each have a duration (T1) comprised in an interval of values ranging from 15 to 35% of the duration (T) of the realized cycles.
Claims14
An optical device (FILT) comprising:
- a control unit (CTRLU) and
- a filtering module (LIMOD) adapted for opening and closing a viewing space in a visible light spectrum,
- wherein said optical device (FILT) is configured to periodically open and close said viewing space according to successive cycles operated at a frequency Fd, each cycle having a duration T and comprising a viewing space opening period of duration T1 followed or preceded by a viewing space closing period of duration T2,
- wherein said frequency Fd is comprised within an interval of values ranging from 60 to 90 Hz and the duration T1 of the viewing space opening periods is comprised within an interval of values ranging from 15 to 35% of the duration T of the cycles;
- wherein said cycles reduce mirror images perceived by dyslexic subjects during reading.
An optical filtering method for facilitating reading of graphic and/or text content on any medium by dyslexic subjects, said method being implemented in an optical device (FILT) comprising a control unit (CTRLU) and a filtering module (LIMOD) adapted for opening and closing a viewing space in a visible light spectrum, said method comprising
- periodic openings and closings of a viewing space by successive cycles operated at a predetermined frequency Fd, each cycle having a duration T and comprising a viewing space opening period of duration T1 followed or preceded by a viewing space closing period of duration T2,
- wherein said frequency Fd is comprised within an interval of values ranging from 60 to 90 Hz and in that the duration T1 of the viewing space opening periods is comprised within an interval of values ranging from 15 to 35% of the duration T of the cycles;
- wherein said cycles reduce mirror images perceived by said dyslexic subjects during reading.
Dependencies are inferred from the claim text.