Monolithic all-silicon flat lens for broadband LWIR imaging
نویسندگان
چکیده
We designed, fabricated and characterized a flat multi-level diffractive lens (MDL) comprised of only silicon with diameter = 15.2mm, focal length 19mm, operating over the longwave infrared (LWIR) spectrum 8um to 14um. experimentally demonstrated field view 46deg, depth focus >7mm wavelength-averaged Strehl ratio 0.46. All these metrics were comparable those conventional refractive lens. The active device thickness is its weight (including substrate) less than 0.2g.
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ژورنال
عنوان ژورنال: Optics Letters
سال: 2021
ISSN: ['1539-4794', '1071-2763', '0146-9592', '1071-8842']
DOI: https://doi.org/10.1364/ol.426384