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During the design process of waveguide devices in the field of augmented and mixed reality applications (AR/MR), the accurate calculation of the achievable optical performance is one of the major tasks. One very important quantity is, besides the spatial and angular uniformity, the modulation transfer function (MTF), which enables an assessment of the resolution capability of the final device. In this example, we point out the impact of diffraction and coherence effects on the accuracy of the calculated MTF. We further show that an accurate and fast inclusion of these effects necessitates a combination of highly interoperable simulation techniques on a single platform. This also enables the user to seamlessly control the accuracy and speed balance of complex optical systems.
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