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US 6,788,423 B2Granted
Conic constant measurement methods for refractive microlenses
AssigneeDigital Optics Corporation
InventorsAlan D. Kathman, Thomas J. Suleski, Alvaro Cruz-Cabrera, Gregory Brady
Life of this patent
Estimating the term…
Abstract
An aspheric microlens, particularly a conic constant of the microlens, may be evaluated and this evaluation may be used to determine an optimal process for creating the aspheric microlens. Such evaluation may include a curve fitting or a numerical expression of the wavefront.
Claims14
A method of evaluating an aspherical microlens comprising:
- aligning the aspherical microlens in an interferometer;
- projecting a spherical wavefront on the aspherical microlens;
- detecting a wavefront reflected from the aspherical microlens;
- and
- deriving from the wavefront a conic constant that specifies the asphericity of the aspherical microlens.
2 more elements
Dependencies are inferred from the claim text.