Title: Method of designing progressive diopter lens group
Application Number: 200610056898 Application Date: 2006.03.09
Publication Number: 1831582 Publication Date: 2006.09.13
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G02C13/00,G02C7/06
Applicant(s) Name: Seiko Epson Corp. Address:
Inventor(s) Name:
Attorney & Agent: huang lunwei
Abstract:
     Provided is a method of designing a progressive refracting power lens group, in which the refractive indexes of materials of progressive refracting power lenses are identical and which enables viewing an object in the same attitude as with a lens replaced with a progressive refracting power lens, having a different refractive power in the progressive refracting power lens group, where the design concepts of the progressive refracting power lenses have been unified, even when it is changed. The position of a second refractive section is changed vertically, to make prism refracting power constant at a refractive power measurement point of the second refractive section for seeing an object at a close range, and a progressive zone length is increased or decreased, according to the refractive power of the second refractive section.
Time: 6
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