公开(公告)号：FR2769998A1

公开(公告)日：1999-04-23

申请号：FR9712988

申请日：1997-10-16

Applicant: ESSILOR INT

Inventor： LE SAUX GILLES ,  PEDRONO CLAUDE ,  ROSSIER CLAIRE

IPC: G02C7/06 ,  G02C7/02

Abstract: The lens has an aspherical surface (S) presenting at any point a mean sphere and cylinder, having a distance vision zone (VL), a near vision zone (VP), an intermediate vision zone (VI) and a main meridian of progression (MM') passing through all three zones. The relationship between a maximum cylinder within a circle of 20 mm radius centered on the geometrical center of the lens and the distance from the center to a point inside the circle or maximum cylinder is less than or equal to half the maximum inclination of the mean sphere on the main meridian of progression.

公开(公告)号：FR2733328A1

公开(公告)日：1996-10-25

申请号：FR9504800

申请日：1995-04-21

Applicant: ESSILOR INT

Inventor： AHSBAHS FRANCOISE ,  BAUDART THIERRY ,  LE SAUX GILLES

IPC: G02C7/06 ,  G02C7/02

Abstract: The lens has an aspherical surface (S) with a distant vision zone (VL), a close vision zone (VP) and an intermediate vision zone (VI), with a main progression meridian (MM') passing through the three zones. The three vision zones (VL, VP, VI) are separated by isocylindrical lines, and the distant vision zone has a sector angle of at least 145 degrees. A line bisecting the angle forms an angle of less than 5 degrees, and pref under 2 degrees with a vertical.