Apparatus and method for use in fulfilling illumination prescription
First Claim
1. A method for use in defining a lens profile, comprising:
- determining an illumination integral for an illuminance pattern of an input beam;
determining a far-field intensity prescription;
establishing a one to one spatio-angular correspondence of transverse location of the input beam with direction in the intensity prescription;
deriving surface normal vectors of an output surface of the transverse locations across the input beam; and
determining the output surface according to the surface normal vectors.
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Accused Products
Abstract
The present embodiments provide methods, apparatuses, and assemblies for use in producing a desired output beam that meets a desired intensity prescription. An apparatus can include an input surface, and an optically active output surface that receives a collimated beam, such that the output surface refractively maps an illuminance distribution of the collimated beam into a prescribed intensity pattern. The apparatus can include a collimating lens that collimates an input beam. Additionally, the output surface can be defined according to a cumulative illumination integral for the illuminance distribution and a cumulative illumination integral of the intensity pattern. Some embodiments provide methods that can determine an illumination integral for an illuminance pattern of an input, determine an intensity prescription, establish a spatio-angular correspondence of the input beam with the intensity prescription, derive surface normal vectors, and determine the output surface according to the surface normal vectors.
132 Citations
12 Claims
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1. A method for use in defining a lens profile, comprising:
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determining an illumination integral for an illuminance pattern of an input beam; determining a far-field intensity prescription; establishing a one to one spatio-angular correspondence of transverse location of the input beam with direction in the intensity prescription; deriving surface normal vectors of an output surface of the transverse locations across the input beam; and determining the output surface according to the surface normal vectors. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for use in defining a lens profile, comprising:
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determining an intensity prescription; determining an illuminance pattern of an input beam; and defining an optically active surface of a lens, comprising; integrating a cumulative flux distribution of the determined illuminance pattern; integrating a cumulative flux distribution of the determined intensity prescription and obtaining first and second factored profile angles; sweeping the first profile angle along a space defined by the second profile; and defining the optically active surface according to the sweep of the first profile angle. - View Dependent Claims (9, 10, 11, 12)
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Specification