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Chromatically multi-focal optics based on micro-lens array design
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DOI：10.1364/OE.391674.png)
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CCD arrays encode color information via uniformly distributed red, green and blue pixels. Therefore, even a perfectly achromatic system projecting an image onto a CCD plane cannot possibly associate a single object point with the 3 or more discrete pixels encoding color content. Here, we propose and demonstrate a micro-lens array (MLA) design that simultaneously corrects chromatic aberrations and separates color channels to spatially distinct pixels. Starting from a commercially available aspheric condenser lens, methods to design and assess the performance of a few microns deep MLA etched on the convex optical surface are detailed. Actual fabrication is carried out by fluid jet polishing, with an optical form deviation of 0.24 mu m rms. Finally, the MLA is assessed with a narrowly collimated beam containing two wavelengths, which produces distinct spots of diameter 10-15 mu m as expected. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Keyword:
DWELL TIME
ABERRATION
期刊
IF:
3.3
论文数:
6.1W
被引数:
14.3W
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引用论文
Chromatic-aberration-corrected diffractive lenses for ultra-broadband focusing.png)
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