Title:
二重プログレッシブ眼鏡レンズ
Document Type and Number:
Japanese Patent JP2006513451
Kind Code:
A
Abstract:
A double progressive spectacle lens is described. The invention is distinguished in that at least one of the two progressive surfaces has at least one of the following properties: principal line of sight a) the profile of the surface power along the principal line of sight in the progression channel is not monotonic between y=-15 mm and y=+10 mm, b) the profile of the surface astigmatism along the principal line of sight has at least two clearly expressed maxima that are at least 0.175 dpt above an adjacent minimum, c) the surface astigmatism A deviates in absolute terms by more than dA upward or downward from the prescription value AR of the cylinder at approximately all points along the principal line of sight, d) the surface astigmatism has a global maximum on or in the vicinity of the principal line of sight between y=±20 mm, e) the surface astigmatism has a local maximum on or in the vicinity of the principal line of sight between y=±20 mm, f) 85% of the change in the surface power along the principal line of sight is reached on each of the surfaces on a path of less than 11 mm, g) the channel width at 0.75 dpt has at least two minima in the progression channel between y=+10 mm and y=-18 mm, distance zone h) the surface astigmatism A deviates in the distance zone by more than dA upward or downward from the prescription value AR of the cylinder at approximately all points: |A-AR|>=dA, with dA>=0.18 dpt i) the surface astigmatism A deviates in the distance zone by more than dA upward or downward from the prescription value AR of the cylinder at at least one point: |A-AR|>=dA, with dA>=0.5 dpt near zone j) the surface astigmatism A deviates in the near zone by more than dA upward or downward from the prescription value AR of the cylinder at approximately all points: |A-AR|>=dA, with dA>=0.22 dpt k) the surface astigmatism A deviates in the near zone by more than dA upward or downward from the prescription value AR of the cylinder at at least one point: |A-AR|>=dA, with dA>=0.4 dpt.
Inventors:
Weener. Edda
Velck andrea
Esser. Gregor
Altima Helmut
Heimar Walter
Velck andrea
Esser. Gregor
Altima Helmut
Heimar Walter
Application Number:
JP2004566799A
Publication Date:
April 20, 2006
Filing Date:
December 19, 2003
Export Citation:
Assignee:
Rodenstock. Gezel Shaft. Mitt. Beschlenktel. Haftung
International Classes:
G02C7/06; G02C7/02
Attorney, Agent or Firm:
Yoshitaka Oshida
Yoshiteru Oshida
Yoshiteru Oshida