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    "headline": "Fraunhofer IOF builds silicon double-slit for ESA FLEX satellite",
    "dek": "Fraunhofer IOF developed a silicon double-slit assembly for the ESA FLEX satellite to measure plant fluorescence.",
    "prose": "Researchers at the Fraunhofer Institute for Applied Optics and Precision Engineering IOF in Jena, Germany, developed and manufactured a silicon-based double-slit assembly and two high-precision mirrors for the FLEX satellite's spectrometer. [^1]\n\nThe European Space Agency's FLEX mission is scheduled to launch into space on September 15, 2026, as planned. [^2]\n\nThe European Space Agency (ESA) has launched the FLEX mission to reveal new insights into how plants function by measuring the faint fluorescence they emit when they capture light during photosynthesis. [^3]\n\nThe double-slit assembly developed at Fraunhofer IOF consists of two slits exactly 85 micrometers wide over a length of 44.15 millimeters, with a permissible deviation of only plus or minus 1 micrometer. [^4]\n\nThe FLEX mission aims to provide global maps of plant fluorescence to improve the monitoring of ecosystems, agriculture, and forests, as well as lay new foundations for climate and vegetation research. [^5]\n\nAlthough invisible to the human eye, the fluorescence signal changes with environmental conditions and plant health, allowing scientists to assess vegetation health and stress. [^6]\n\nThe FLEX satellite is equipped with the Fluorescence Imaging Spectrometer (FLORIS), an instrument designed specifically to detect and map this delicate glow from space. [^7]",
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      "statement": "Researchers at the Fraunhofer Institute for Applied Optics and Precision Engineering IOF in Jena, Germany, developed and manufactured a silicon-based double-slit assembly and two high-precision mirrors for the FLEX satellite's spectrometer.",
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