Optical inspection and characterization of microoptics using confocal microscopy |
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Authors: | H J Tiziani T Haist S Reuter |
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Institution: | Institut für Technische Optik, University of Stuttgart, Pfaffenwaldring 9, 70569 Stuttgart, Germany |
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Abstract: | With the growing demand for microoptics in different areas the importance of the characterization increases. Methods for a fast defect detection in microlens arrays are developed. We present a technique where the confocal principle is applied for determining the variation and the absolute value of the focal length. Additionally, using a self–filtering method the deviation of the periodic structure of microlens arrays is investigated theoretically and experimentally. Point-like defects as well as aberrations have been detected. The introduced methods allow the fast, parallel characterization of microlens arrays. |
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Keywords: | Microlens array Aberration Common– path interferometry Confocal microscopy Self– filter OALCD OASLM |
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