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The optical performance of the telescope will depend on the accurate alignment of its mirrors. During Integration Testing and Commissioning (IT&C), mirrors will be installed and aligned sequentially. The alignment will be verified by measuring the wavefront progressively at different focus locations using starlight at night with a custom-designed wavefront measurement system (WMS) that consists of a Shack-Hartmann wavefront sensor. In this paper, we will present the optical design of the WMS. We will discuss the testing and calibration process of the as-built WMS in the lab and demonstrate the final in-lab performance. |
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