| 摘要 |
An optical lens having at least one of its optical surfaces comprising:
- a main continuous optically functional section limited by an initial contour (CO) with an inscribed circle (Cins) having a radius greater than or equal to 10 mm,
- n successive optically functional sections with n greater than or equal to 2,
wherein
- the main continuous optically functional section is joined to the first optimally functional section by a step,
- two successive optically functional sections are joined by a step,
- each optimally functional section extends radially from the center of the inscribed circle and is limited by an interior contour Cint,i and an exterior contour Cext,i with the interior contour Cint,i fully comprised in the exterior contour Cext,i ; and the smallest distance between a point of the interior contour and a point of the exterior contour being greater than or equal to 0.5 mm, and
- the optically functional sections are arranged so that for any i comprised between 1 and n the exterior contour of the ith optimally functional section Cext,i is fully comprised in the interior contour of the (i+1)th optically functional section Cint,i+1, and the half-planes Pj comprising the line normal to the plane defined by the inscribed circle passing by the center of the inscribed circle, the half-planes Pj being bounded by said line, the distance between an intersection point between the half-plane Pj and the exterior contour of the ith optimally functional section Cext,i and an intersection point between the half-plane Pj and the interior contour of the (i+1)th optimally functional section Cint,i+1 is smaller than or equal to I mm. |
