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Method and device for preparing a spectacle frame

  • US 9,589,340 B2
  • Filed: 09/06/2013
  • Issued: 03/07/2017
  • Est. Priority Date: 09/07/2012
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method for preparing a spectacle frame (1) adapted to a face, the spectacle frame (1) having a bridge (11) between two lenses (9-10) and a frame front (2) with end-pieces (5-6) to which temples (3-4) are connected, the method including the following steps:

  • procuring an image (I) of the face, forehead uncovered,identifying characteristic points (A, A1, A2, OD, OG) on the image (I) of the face,identifying shape points (A, A2, MFD, MFG, ELPD, ELPG, BD, BG) on the image (I) of the face,identifying by these shape points (A, A2, MFD, MFG, ELPD, ELPG, BD, BG) the shape of the face among predefined characteristic shapes,determining from these characteristic points a receiving box (S′

    R′

    D′

    , S′

    R′

    G′

    , I′

    R′

    G′

    , I′

    R′

    D′

    ) for the frame front of the spectacle frame, anddetermining the width and the position in terms of height of the end-pieces relative to the face of the spectacle frame as a function of the identified shape of the face,wherein the characteristic points (A, A1, A2, OD, OG) comprise;

    the point A that is situated at the front hairline,the point A1 that is situated at the center of the root of the nose,the point A2 that is situated at the point of the chin,the point OD that is the center of the right pupil,the point OG that is the center of the left pupil,further including the step of identifying the median vertical line (V) that is the straight line nearest the points A, A1 and A2,further including the following steps;

    identifying a right pupil axis APD that is parallel to the median vertical line (V) and that passes through the point OD,identifying a left pupil axis APG that is parallel to the median vertical line (V) and that passes through the point OG,identifying a right geometric axis AGD that is parallel to the median vertical line (V) and that is offset toward the right ear at a distance of half an interpupillary distance OD-OG increased by a distance (d), said distance (d) being approximately 3.5 mm for an image on a 1;

    1 scale,identifying a left geometric axis AGG that is parallel to the median vertical line (V) and that is offset toward the left ear at a distance of half an interpupillary distance OD-OG increased by a distance (d), said distance (d) being approximately 3.5 mm for an image on a 1;

    1 scale,identifying the point PD that is the intersection between the right pupil axis APD and the top of the right cheek,identifying the point PG that is the intersection between the left pupil axis APG and the top of the left cheek,identifying the point SD at the intersection between the lower boundary of the right eyebrow and the right pupil axis APD,identifying the point SG at the intersection between the lower boundary of the left eyebrow and the left pupil axis APG,identifying the line LS of the eyebrows, which is perpendicular to the median vertical line (V) and that passes at median distance of the points SD and SG,identifying the line LP of the cheeks, which is perpendicular to the median vertical line (V) and that passes at median distance of the points PD and PG,identifying the horizontal geometrical axis AGH of the frame, which is situated equidistantly from the eyebrow line LS and the cheek line LP, and which cuts the right geometrical axis AGD at the point QD and the left geometrical axis AGG at the point QG,identifying the point N′

    D that is the intersection between the horizontal geometrical axis AGH and the base of the right wing of the nose,identifying the point N′

    G that is the intersection between the horizontal geometrical axis AGH and the base of the left wing of the nose,identifying the point NO that is the intersection between the median vertical line (V) and the horizontal geometrical axis AGH,identifying the point ND that is on the horizontal geometrical axis AGH and that is half the distance N′

    D-N′

    G toward the right ear from the point NO,identifying the point NG that is on the horizontal geometrical axis AGH and that is half the distance N′

    D-N′

    G toward the left ear from the point NO,identifying the line PND parallel to the median vertical line (V) passing through the point ND,identifying the line PNG parallel to the median vertical line (V) passing through the point NG,identifying the point MTD that is the intersection between the horizontal geometrical axis AGH and the line SPND symmetrical to the axis PND relative to the right geometric axis AGD,identifying the point MTG that is the intersection between the horizontal geometrical axis AGH and the line SPNG symmetrical to the axis PNG relative to the left geometric axis AGG,identifying the point STD that is the intersection between the axis SPND and the eyebrow line LS,identifying the point SND that is the intersection between the axis PND and the eyebrow line LS,identifying the point STG that is the intersection between the axis SPNG and the eyebrow line LS,identifying the point SNG that is the intersection between the axis PNG and the eyebrow line LS,identifying the point ITD that is the intersection between the axis SPND and the cheek line LP,identifying the point IND that is the intersection between the axis PND and the cheek line LP,identifying the point ITG that is the intersection between the axis SPNG and the cheek line LP,identifying the point ING that is the intersection between the axis PNG and the cheek line LP,identifying the upper root ROD of the right ear,identifying the upper root ROG of the left ear,identifying the right end-piece line TD parallel to the median vertical line (V) and offset toward the right ear by a distance (D), said distance (D) being half the distance ROD-ROG,identifying the point S′

    R′

    D′

    that is the intersection between the right end-piece line TD and the eyebrow line LS,identifying the point I′

    R′

    D′

    that is the intersection between the right end-piece line TD and the cheek line LP,identifying the left end-piece line TG parallel to the median vertical line (V) and offset toward the left ear by a distance (D), said distance (D) being half the distance ROD-ROG,identifying the point S′

    R′

    G′

    that is the intersection between the left end-piece line TG and the eyebrow line LS,identifying the point I′

    R′

    G′

    that is the intersection between the left end-piece line TG and the cheek line LP.

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