Zemax DLLs Streamline Image Slicer IFU Modeling for Astronomy

This paper introduces sequential and non-sequential Dynamic Link Libraries (DLLs) for Zemax OpticStudio, designed to efficiently model image slicer integral field units (IFUs). IFUs are crucial components in astronomical spectrographs, enabling simultaneous recording of spatial and spectral information. Traditional IFU modeling in Zemax is cumbersome, requiring multiple configurations and lacking accurate diffraction modeling. The presented DLLs overcome these limitations by replicating natively transformed surfaces and enabling the modeling of complex IFU designs within a single file. The DLLs have been successfully used to replicate the design of SPECTRE, a facility spectrograph for the NASA Infrared Telescope Facility, demonstrating their practical applicability. Furthermore, the DLLs are versatile and can be employed in other applications requiring the modeling of arbitrary surface grids. This work paves the way for the development of a comprehensive optical design tool for IFUs, streamlining the instrument design process and potentially leading to more advanced astronomical instrumentation.

From a space-tech perspective, this advancement directly impacts the development of more efficient and capable space-based telescopes and spectrographs. Lightweight and high-performance instruments are critical for space missions, and the ability to rapidly design and optimize IFUs using these DLLs can significantly reduce development time and costs. This is particularly relevant for future missions aimed at studying exoplanet atmospheres and searching for signs of life beyond Earth.

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