Invention Grant
- Patent Title: Anamorphic objective lens
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Application No.: US15053394Application Date: 2016-02-25
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Publication No.: US10078201B2Publication Date: 2018-09-18
- Inventor: Iain A. Neil
- Applicant: Cooke Optics Ltd.
- Applicant Address: GB Thurmaston, Leicester
- Assignee: COOKE OPTICS LTD.
- Current Assignee: COOKE OPTICS LTD.
- Current Assignee Address: GB Thurmaston, Leicester
- Agency: Epstein Drangel LLP
- Agent Robert L. Epstein
- Main IPC: G02B13/08
- IPC: G02B13/08 ; G02B9/64 ; G02B3/06 ; G02B27/00 ; G02B13/04 ; G02B13/00 ; G02B15/177

Abstract:
An anamorphic objective lens comprising, along an optical axis and in order from an object space to an image space: at least a negative (−) spherical first lens group; an anamorphic second lens group and a positive (+) spherical third lens group wherein an aperture stop is located before, after or preferably within the spherical third lens group such that the anamorphic objective lens creates a traditional elliptical bokeh of out of focus objects. Both spherical lens groups contain spherical refractive optical surfaces and the anamorphic lens group contains cylindrical and plano optical surfaces with at least one cylindrical surface oriented at substantially 90 degrees about at least one other cylindrical surface. The negative spherical first lens group may provide focusing.
Public/Granted literature
- US20160170186A1 ANAMORPHIC OBJECTIVE LENS Public/Granted day:2016-06-16
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