US 11,933,971 B2
Process for creating an optical component for generating, from a given light source, a given near-field illumination
Jocelyn Meyron, Saint-Martin-d'Hères (FR); Quentin Mérigot, Orsay (FR); and Boris Thibert, Saint-Martin-d'Hères (FR)
Assigned to UNIVERSITE GRENOBLE ALPES, Saint Martin d'Heres (FR); GRENOBLE INP (INSTITUT POLYTECHNIQUE DE GRENOBLE), Grenoble (FR); CNRS (CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE), Paris (FR); and UNIVERSITÉ PARIS-SACLAY, Saint Aubin (FR)
Appl. No. 17/296,116
Filed by UNIVERSITÉ GRENOBLE ALPES, Saint Martin d'Heres (FR); GRENOBLE INP (INSTITUT POLYTECHNIQUE DE GRENOBLE), Grenoble (FR); CNRS (CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE), Paris (FR); and UNIVERSITÉ PARIS-SUD 11, Orsay (FR)
PCT Filed Nov. 20, 2019, PCT No. PCT/IB2019/059969
§ 371(c)(1), (2) Date May 21, 2021,
PCT Pub. No. WO2020/104960, PCT Pub. Date May 28, 2020.
Claims priority of application No. 1871709 (FR), filed on Nov. 22, 2018.
Prior Publication US 2022/0011569 A1, Jan. 13, 2022
Int. Cl. G02B 27/00 (2006.01); G02B 27/09 (2006.01); G06F 17/11 (2006.01)
CPC G02B 27/0012 (2013.01) [G02B 27/0927 (2013.01); G02B 27/095 (2013.01); G02B 27/0977 (2013.01); G06F 17/11 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A method for fabricating an optical component that generates on a near field illumination target a determined illumination pattern according to which each point (i) of the illumination target receives a quantity of light (alpha i) via an illumination originating from an illumination light source and incident on the optical component which is located between the illumination light source and the illumination target, wherein the method comprising the following steps:
(a) for each point (i) of the illumination target, computing a direction (dir i) of a vector connecting an origin point (o) and the point (i) of the illumination target, the original point (o) being between the illumination light source and the illumination target;
(b) defining a surface of the optical component such that said surface passes through a reference point (A) positioned between the origin point (0) and the illumination target and so that, when the illumination originating from the illumination light source is incident on the optical component, the optical component generates an output illumination comprised of the quantity of light (alpha_i) of all the points (i) of the illumination target, points (z_i) of the optical component each respectively generating a correspondent output illumination to a correspondent point (i) of the illumination target comprised of a respective quantity of light (alpha_i) received by the point (i) and a respective direction (dir_i) connecting to the point (i);
(c) for each point (z_i) of the optical component, computing a corrected direction (dirc_i) which corresponds to a direction of a vector connecting the point (z_i) and a respective point (i) of the illumination target;
(d) determining whether or not a criterion is satisfied, whereby the mean of a sum of norms of differences between the direction (dir_i) and the corrected direction (dirc_i) of all the points (i) of the illumination target is less than a predetermined value;
(e) fabricating the optical component when the criterion is satisfied; and
(f) if the criterion is not satisfied, setting the direction (dir_i) to have the value of the corrected direction (dirc_i) and repeating from step (b) until the criterion is satisfied.