# Laboratory and telescope demonstration of the TP3-WFS for the adaptive optics segment of AOLI

## TL;DR

This paper reports the successful laboratory and telescope demonstration of the TP3-WFS, a novel wavefront sensor for adaptive optics in AOLI, enabling real-time corrections and improved sky coverage in visible wavelengths.

## Contribution

It introduces the TP3-WFS, a new wavefront sensor that outperforms classical sensors by enabling AO corrections with fainter stars, demonstrated in real telescope conditions.

## Key findings

- First real-time AO correction with TP3-WFS at WHT
- Successful laboratory and telescope implementation of the sensor
- Potential for increased sky coverage in AO systems

## Abstract

AOLI (Adaptive Optics Lucky Imager) is a state-of-art instrument that combines adaptive optics (AO) and lucky imaging (LI) with the objective of obtaining diffraction limited images in visible wavelength at mid- and big-size ground-based telescopes. The key innovation of AOLI is the development and use of the new TP3-WFS (Two Pupil Plane Positions Wavefront Sensor). The TP3-WFS, working in visible band, represents an advance over classical wavefront sensors such as the Shack-Hartmann WFS (SH-WFS) because it can theoretically use fainter natural reference stars, which would ultimately provide better sky coverages to AO instruments using this newer sensor. This paper describes the software, algorithms and procedures that enabled AOLI to become the first astronomical instrument performing real-time adaptive optics corrections in a telescope with this new type of WFS, including the first control-related results at the William Herschel Telescope (WHT).