18 June 2007 Determination of lens parameters with digital holography
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Abstract
Determination of lens parameters is important from their application point of view. These parameters include focal length, radius of curvature and refractive index of the lens material. Of these the refractive index data will shed light on the reflectance and transmittance of the material with which the lens is made. Digital holography can be used for the parameter determination as well as for the test of collimation of waves emanating from lenses. Digital holograms are recorded for various positions of the test lens from a point source and the focal length is the position of the test lens where a single fringe results. Radius of curvature is determined by focusing a collimated beam on to the surface of the test lens. Using the lens equation the refractive index of the material of the lens can be determined. Simulations for the method in the case of a thin bi-convex lens are presented in the paper.
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Vani K. Chhaniwal, Vani K. Chhaniwal, Arun Anand, Arun Anand, } "Determination of lens parameters with digital holography", Proc. SPIE 6616, Optical Measurement Systems for Industrial Inspection V, 66164H (18 June 2007); doi: 10.1117/12.726192; https://doi.org/10.1117/12.726192
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