Amplitude filters in reconstructing the shape of microlenses

Rafal Kasztelanic

doi:10.1117/12.881868

14 December 2010 Amplitude filters in reconstructing the shape of microlenses

Rafal Kasztelanic

Proceedings Volume 7746, 17th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics; 77461K (2010) https://doi.org/10.1117/12.881868
Event: 17th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 2010, Liptovsky Jan, Slovakia

Abstract

The paper deals with a computer simulation and an experimental realization of an optical setup for automatic quality control of microlenses arrays. The method is based on a 4f coherent light correlator setup with an amplitude filter placed in the Fourier plane. The output intensity signal is simple to analyze and interpret because the intensity is proportional to the first derivative of the distortion of the input wavefront. This method is shift invariant, so it allows for examination of single elements or a set of micro-optical elements simultaneously. Such an analysis does not allow to obtain quantitative data, however it can give the initial assessment of the quality of the elements to be analyzed. A more detailed analysis can be carried out with the use of the Fourier-based modal method and Zernike polynomials expansion method. What is important, the analysis is computer-based and is done on the basis of the initial single optical measurement. Moreover, the whole resolution of the camera is used.

Citation Download Citation

Rafal Kasztelanic "Amplitude filters in reconstructing the shape of microlenses", Proc. SPIE 7746, 17th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 77461K (14 December 2010); https://doi.org/10.1117/12.881868

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KEYWORDS

Optical filters

Microlens array

Linear filtering

Microlens

Image filtering

Optical correlators

Zernike polynomials

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