Journal
OPTICS EXPRESS
Volume 18, Issue 12, Pages 12458-12469Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.18.012458
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- German company SICK AG
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We present an efficient, low-cost modulation transfer function (MTF) measurement approach, optimized for characterization of tunable micro-lenses; the MTF may easily be measured at a variety of different focal lengths. The approach uses a conventional optical microscope with an optimized approach for lens illumination and the measurement results have been correlated with a commercial MTF measurement system. Measurements on fixed-focus and tunable micro-lenses were performed; for the latter, resolution for lenses with back focal length of 11 mm was 55 lines/mm, decreasing to 40 lines/mm for a back focal length of 4 mm. In general, it was seen that performance was better for lenses with longer focal lengths. (C) 2010 Optical Society of America
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