Sequential and non-sequential Zemax Dynamic Link Libraries for generating image slicer integral field units

TL;DR

This paper introduces efficient Zemax DLLs for modeling image slicer IFUs, enabling accurate, fast, and comprehensive optical design simulations including diffraction effects.

Contribution

It presents the development of sequential and non-sequential DLLs that accurately model image slicer IFUs within Zemax, improving speed and detail over traditional methods.

Findings

DLLs reproduce natively transformed surfaces in Zemax.

DLLs successfully replicate the SPECTRE spectrograph design.

DLLs work in transmission and can model arbitrary surface grids.

Abstract

In astronomy, image slicer integral field units (IFUs) are often used in integral field spectrographs to simultaneously record spatial and spectral information. The majority of astronomical instruments, including integral field spectrographs, are designed using the Zemax OpticStudio optical design software. Modeling an image slicer IFU in Zemax traditionally requires using many separate configurations, which is slow, cannot accurately model diffraction, and can prevent one from fully describing their instrument within a single file. This paper presents the implementation of sequential and non-sequential Dynamic Link Libraries (DLLs) that efficiently model image slicer IFUs with a known design. The parameters used to manipulate the surfaces are chosen to match fabrication processes. The DLLs identically reproduce natively transformed surfaces in Zemax and have also been used to replicate the design of SPECTRE, a facility spectrograph with a 36-slice image slicer for the NASA Infrared Telescope Facility. The DLLs also work in transmission and can be used in other applications that require modeling a nearly arbitrary grid of surfaces. In the future, this work may facilitate the creation of an optical design tool for IFUs that starts from basic system requirements.