Invention Grant
- Patent Title: Progressive addition lens operating in combination with a multi-order diffractive optic
- Patent Title (中): 与多级衍射光学元件结合操作的渐进加法透镜
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Application No.: US12118226Application Date: 2008-05-09
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Publication No.: US07654667B2Publication Date: 2010-02-02
- Inventor: Ronald D. Blum , William Kokonaski , Joshua N. Haddock
- Applicant: Ronald D. Blum , William Kokonaski , Joshua N. Haddock
- Applicant Address: US VA Roanoke
- Assignee: PixelOptics, Inc.
- Current Assignee: PixelOptics, Inc.
- Current Assignee Address: US VA Roanoke
- Agency: Townsend and Townsend and Crew LLP
- Main IPC: G02C7/06
- IPC: G02C7/06

Abstract:
A multi-focal spectacle lens is presented having far distance, intermediate distance, and near distance vision correction, in which the lens includes a progressive addition surface with a progression of optical power. The lens further includes a multi-order diffractive surface relief structure with an optical add power. The multi-order diffractive structure reduces chromatic aberration as compared to a conventional diffractive structure of equivalent optical power. The lens may also include a wavefront splitting device diffractive structure for generating multiple optical powers simultaneously. When the progressive addition surface and the multi-order diffractive surface relief structure are in optical communication an overall progression of optical add power may be provided by the combination of the progressive addition surface with the multi-order surface relief diffractive structure.
Public/Granted literature
- US20080278681A1 PROGRESSIVE ADDITION LENS OPERATING IN COMBINATION WITH A MULTI-ORDER DIFFRACTIVE OPTIC Public/Granted day:2008-11-13
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