MORFEO Wavefront Error Budget Defined for ESO's Extremely Large Telescope
Scientists have published a comprehensive wavefront error (WFE) budget for MORFEO, the multi-conjugate adaptive optics module being built for ESO's Extremely Large Telescope (ELT). MORFEO, formerly known as MAORY, uses 12 wavefront sensors and three deformable mirrors to deliver diffraction-limited near-infrared imaging for the ELT's first-light camera, MICADO. The error budget is critical for verifying system performance and guiding end-to-end simulations that will shape future observing strategies.
MORFEO (Multi-conjugate adaptive Optics Relay For ELT Observations) is described as the largest and most complex adaptive optics system ever developed for astronomical use, intended to correct atmospheric distortions for the ESO Extremely Large Telescope. The newly presented WFE budget systematically accounts for all major sources of residual optical error, including atmospheric turbulence, imperfections in optical surfaces, alignment tolerances, control system residuals, and calibration uncertainties. The paper details the methodology used to evaluate each contributing term and the external conditions and system configurations assumed in the analysis. This budget is not merely a design document — it is actively being used as input for end-to-end simulations of MORFEO-assisted observations, which will assess the scientific potential of the system. The work was submitted to the Adaptive Optics for Extremely Large Telescopes 8 conference, scheduled for October 2025 in Viña del Mar, Chile, and represents a key milestone in the instrument's verification process.
What's missing
As a conference proceedings preprint, the work has not yet undergone formal peer review.
What different sources said
- arXiv astro-phCenter
MORFEO wavefront error budget
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