Invention Grant
- Patent Title: Ophthalmic lenses with aspheric optical features
- Patent Title (中): 具有非球面光学特征的眼科镜片
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Application No.: US12702791Application Date: 2010-02-09
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Publication No.: US09022563B2Publication Date: 2015-05-05
- Inventor: Amitava Gupta , Ronald D. Blum
- Applicant: Amitava Gupta , Ronald D. Blum
- Applicant Address: JP Tokyo
- Assignee: Mitsui Chemicals, Inc.
- Current Assignee: Mitsui Chemicals, Inc.
- Current Assignee Address: JP Tokyo
- Agency: Sterne, Kessler, Goldstein & Fox P.L.L.C.
- Main IPC: G02C7/06
- IPC: G02C7/06

Abstract:
Aspects of the present invention provide a lens comprising a non-rotationally symmetric aspheric optical element, surface or feature and a rotationally symmetric aspheric optical element, surface or feature. The non-rotationally symmetric aspheric optical feature can be a progressive power region. The non-rotationally symmetric aspheric optical feature and rotationally symmetric aspheric optical feature can be in optical communication when located on different surfaces of a lens or can be collapsed to occupy a single surface of a lens. The non-rotationally symmetric aspheric optical feature and rotationally symmetric aspheric optical feature can each contribute to the add power of a lens. Distortion (e.g., astigmatism) of a lens of the present invention can be reduced (e.g., globally and/or locally) by optically combing the non-rotationally symmetric aspheric optical feature with the rotationally symmetric aspheric optical feature. Accordingly, the effective or useable vision zones of a lens of the present invention can be increased.
Public/Granted literature
- US20100201941A1 OPHTHALMIC LENSES WITH ASPHERIC OPTICAL FEATURES Public/Granted day:2010-08-12
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