All Outputs (33)

On-sky results for the integrated microlens ring tip-tilt sensor (2021)
Journal Article
Hottinger, P., Harris, R. J., Crass, J., Dietrich, P.-I., Blaicher, M., Bechter, A., Sands, B., Morris, T., Basden, A. G., Bharmal, N. A., Heidt, J., Anagnos, T., Neureuther, P. L., Glück, M., Power, J., Pott, J.-U., Koos, C., Sawodny, O., & Quirrenbach, A. (2021). On-sky results for the integrated microlens ring tip-tilt sensor. Journal of the Optical Society of America B, 38(9), https://doi.org/10.1364/josab.421459

We present the first on-sky results of the microlens ring tip-tilt sensor. This sensor uses a 3D printed microlens ring feeding six multimode fibers to sense misaligned light, allowing centroid reconstruction. A tip-tilt mirror allows the beam to be... Read More about On-sky results for the integrated microlens ring tip-tilt sensor.

Automated wind velocity profiling from adaptive optics telemetry (2019)
Journal Article
Laidlaw, D. J., Osborn, J., Morris, T. J., Basden, A. G., Gendron, E., Rousset, G., Townson, M. J., & Wilson, R. W. (2020). Automated wind velocity profiling from adaptive optics telemetry. Monthly Notices of the Royal Astronomical Society, 491(1), 1287-1294. https://doi.org/10.1093/mnras/stz3062

Ground-based adaptive optics (AO) systems can use temporal control techniques to greatly improve image resolution. A measure of wind velocity as a function of altitude is needed to minimize the temporal errors associated with these systems. Spatio-te... Read More about Automated wind velocity profiling from adaptive optics telemetry.

Experience with Artificial Neural Networks Applied in Multi-object Adaptive Optics (2019)
Journal Article
Suárez Gómez, S. L., González-Gutiérrez, C., Alonso, E. D., Santos, J. D., Rodríguez, M. L. S., Morris, T., Osborn, J., Basden, A., Bonavera, L., González, J. G.-N., & de Cos Juez, F. J. (2019). Experience with Artificial Neural Networks Applied in Multi-object Adaptive Optics. Publications of the Astronomical Society of the Pacific, 131(1004), Article 108012. https://doi.org/10.1088/1538-3873/ab1ebb

The use of artificial Intelligence techniques has become widespread in many fields of science, due to their ability to learn from real data and adjust to complex models with ease. These techniques have landed in the field of adaptive optics, and are... Read More about Experience with Artificial Neural Networks Applied in Multi-object Adaptive Optics.

Efficient implementation of pseudo open loop control for adaptive optics on Extremely Large Telescopes (2019)
Journal Article
Basden, A., Jenkins, D., Morris, T., Osborn, J., & Townson, M. (2019). Efficient implementation of pseudo open loop control for adaptive optics on Extremely Large Telescopes. Monthly Notices of the Royal Astronomical Society, 486(2), 1774-1780. https://doi.org/10.1093/mnras/stz918

Closed-loop adaptive optics systems which use minimum mean square error wavefront reconstruction require the computation of pseudo open loop wavefront slopes. These techniques incorporate a knowledge of atmospheric statistics which must therefore be... Read More about Efficient implementation of pseudo open loop control for adaptive optics on Extremely Large Telescopes.

A many-core CPU prototype of an MCAO and LTAO RTC for ELT-scale instruments (2019)
Journal Article
Jenkins, D. R., Basden, A. G., & Myers, R. M. (2019). A many-core CPU prototype of an MCAO and LTAO RTC for ELT-scale instruments. Monthly Notices of the Royal Astronomical Society, 485(4), 5142-5152. https://doi.org/10.1093/mnras/stz638

We propose a many-core CPU architecture for Extremely Large Telescope (ELT) scale adaptive optics (AO) real-time control (RTC) for the multi-conjugate AO (MCAO) and laser-tomographic AO (LTAO) modes. MCAO and LTAO differ from the more conventional si... Read More about A many-core CPU prototype of an MCAO and LTAO RTC for ELT-scale instruments.

Optimizing the accuracy and efficiency of optical turbulence profiling using adaptive optics telemetry for extremely large telescopes (2018)
Journal Article
Laidlaw, D. J., Osborn, J., Morris, T. J., Basden, A. G., Beltramo-Martin, O., Butterley, T., …Wilson, R. W. (2018). Optimizing the accuracy and efficiency of optical turbulence profiling using adaptive optics telemetry for extremely large telescopes. Monthly Notices of the Royal Astronomical Society, 483(4), 4341-4353. https://doi.org/10.1093/mnras/sty3285

Advanced adaptive optics (AO) instruments on ground-based telescopes require accurate knowledge of the atmospheric turbulence strength as a function of altitude. This information assists point spread function reconstruction, AO temporal control techn... Read More about Optimizing the accuracy and efficiency of optical turbulence profiling using adaptive optics telemetry for extremely large telescopes.

ELT-scale adaptive optics real-time control with the Intel Xeon Phi Many Integrated Core Architecture (2018)
Journal Article
Jenkins, D. R., Basden, A., & Myers, R. M. (2018). ELT-scale adaptive optics real-time control with the Intel Xeon Phi Many Integrated Core Architecture. Monthly Notices of the Royal Astronomical Society, 478(3), 3149-3158. https://doi.org/10.1093/mnras/sty1310

We propose a solution to the increased computational demands of Extremely Large Telescope (ELT) scale adaptive optics (AO) real-time control with the Intel Xeon Phi Knights Landing (KNL) Many Integrated Core (MIC) Architecture. The computational dema... Read More about ELT-scale adaptive optics real-time control with the Intel Xeon Phi Many Integrated Core Architecture.

The Durham Adaptive Optics Simulation Platform (DASP): Current status (2018)
Journal Article
Basden, A., Bharmal, N., Jenkins, D., Morris, T., Osborn, J., Peng, J., & Staykov, L. (2018). The Durham Adaptive Optics Simulation Platform (DASP): Current status. SoftwareX, 7, 63-69. https://doi.org/10.1016/j.softx.2018.02.005

The Durham Adaptive Optics Simulation Platform (DASP) is a Monte-Carlo modelling tool used for the simulation of astronomical and solar adaptive optics systems. In recent years, this tool has been used to predict the expected performance of the forth... Read More about The Durham Adaptive Optics Simulation Platform (DASP): Current status.

Comparative Study of Neural Network Frameworks for the Next Generation of Adaptive Optics Systems (2017)
Journal Article
González-Gutiérrez, C., Santos, J., Martínez-Zarzuela, M., Basden, A., Osborn, J., Díaz-Pernas, F., & De Cos Juez, F. (2017). Comparative Study of Neural Network Frameworks for the Next Generation of Adaptive Optics Systems. Sensors, 17(6), Article 1263. https://doi.org/10.3390/s17061263

Many of the next generation of adaptive optics systems on large and extremely large telescopes require tomographic techniques in order to correct for atmospheric turbulence over a large field of view. Multi-object adaptive optics is one such techniqu... Read More about Comparative Study of Neural Network Frameworks for the Next Generation of Adaptive Optics Systems.

On-sky demonstration of matched filters for wavefront measurements using ELT-scale elongated laser guide stars (2017)
Journal Article
Basden, A., Bardou, L., Bonaccini-Calia, D., Buey, T., Centrone, M., Chemla, F., …Vidal, F. (2017). On-sky demonstration of matched filters for wavefront measurements using ELT-scale elongated laser guide stars. Monthly Notices of the Royal Astronomical Society, 466(4), 5003-5010. https://doi.org/10.1093/mnras/stx062

The performance of adaptive optics systems is partially dependent on the algorithms used within the real-time control system to compute wavefront slope measurements. We demonstrate the use of a matched filter algorithm for the processing of elongated... Read More about On-sky demonstration of matched filters for wavefront measurements using ELT-scale elongated laser guide stars.

Efficient photonic reformatting of celestial light for diffraction-limited spectroscopy (2016)
Journal Article
MacLachlan, D., Harris, R., Gris-Sánchez, I., Morris, T., Choudhury, D., Gendron, E., …Thomson, R. (2017). Efficient photonic reformatting of celestial light for diffraction-limited spectroscopy. Monthly Notices of the Royal Astronomical Society, 464(4), 4950-4957. https://doi.org/10.1093/mnras/stw2558

The spectral resolution of a dispersive astronomical spectrograph is limited by the trade-off between throughput and the width of the entrance slit. Photonic guided wave transitions have been proposed as a route to bypass this trade-off, by enabling... Read More about Efficient photonic reformatting of celestial light for diffraction-limited spectroscopy.

Monte-Carlo modelling of multi-object adaptive optics performance on the European Extremely Large Telescope (2016)
Journal Article
Basden, A., & Morris, T. (2016). Monte-Carlo modelling of multi-object adaptive optics performance on the European Extremely Large Telescope. Monthly Notices of the Royal Astronomical Society, 463(4), 4184-4193. https://doi.org/10.1093/mnras/stw2306

The performance of a wide-field adaptive optics system depends on input design parameters. Here we investigate the performance of a multi-object adaptive optics system design for the European Extremely Large Telescope, using an end-to-end Monte-Carlo... Read More about Monte-Carlo modelling of multi-object adaptive optics performance on the European Extremely Large Telescope.

Experience with wavefront sensor and deformable mirror interfaces for wide-field adaptive optics systems (2016)
Journal Article
Basden, A., Atkinson, D., Bharmal, N., Bitenc, U., Brangier, M., Buey, T., …Younger, E. (2016). Experience with wavefront sensor and deformable mirror interfaces for wide-field adaptive optics systems. Monthly Notices of the Royal Astronomical Society, 459(2), 1350-1359. https://doi.org/10.1093/mnras/stw730

Recent advances in adaptive optics (AO) have led to the implementation of wide field-of-view AO systems. A number of wide-field AO systems are also planned for the forthcoming Extremely Large Telescopes. Such systems have multiple wavefront sensors o... Read More about Experience with wavefront sensor and deformable mirror interfaces for wide-field adaptive optics systems.

Investigation of POWER8 processors for astronomical adaptive optics real-time control (2015)
Journal Article
Basden, A. (2015). Investigation of POWER8 processors for astronomical adaptive optics real-time control. Monthly Notices of the Royal Astronomical Society, 452(2), 1694-1701. https://doi.org/10.1093/mnras/stv1396

The forthcoming Extremely Large Telescopes (ELTs) all require adaptive optics systems for their successful operation. The real-time control for these systems becomes computationally challenging, in part limited by the memory bandwidths required for w... Read More about Investigation of POWER8 processors for astronomical adaptive optics real-time control.

Monte Carlo modelling of multiconjugate adaptive optics performance on the European Extremely Large Telescope (2015)
Journal Article
Basden, A. (2015). Monte Carlo modelling of multiconjugate adaptive optics performance on the European Extremely Large Telescope. Monthly Notices of the Royal Astronomical Society, 453(3), 3036-3042. https://doi.org/10.1093/mnras/stv1875

The performance of a wide-field adaptive optics system depends on input design parameters. Here we investigate the performance of a multiconjugate adaptive optics system design for the European Extremely Large Telescope, using an end-to-end Monte Car... Read More about Monte Carlo modelling of multiconjugate adaptive optics performance on the European Extremely Large Telescope.

Analysis of electron multiplying charge coupled device and scientific CMOS readout noise models for Shack–Hartmann wavefront sensor accuracy (2015)
Journal Article
Basden, A. (2015). Analysis of electron multiplying charge coupled device and scientific CMOS readout noise models for Shack–Hartmann wavefront sensor accuracy. Journal of Astronomical Telescopes, Instruments, and Systems, 1(3), Article 039002. https://doi.org/10.1117/1.jatis.1.3.039002

In recent years, detectors with subelectron readout noise have been used very effectively in astronomical adaptive optics systems. Here, we compare readout noise models for the two key faint flux level detector technologies that are commonly used: el... Read More about Analysis of electron multiplying charge coupled device and scientific CMOS readout noise models for Shack–Hartmann wavefront sensor accuracy.

Sensitivity improvements for Shack-Hartmann wavefront sensors using total variation minimization (2015)
Journal Article
Basden, A., Morris, T., Gratadour, D., & Gendron, E. (2015). Sensitivity improvements for Shack-Hartmann wavefront sensors using total variation minimization. Monthly Notices of the Royal Astronomical Society, 449(4), 3537-3542. https://doi.org/10.1093/mnras/stv617

We investigate the improvements in Shack–Hartmann wavefront sensor image processing that can be realized using total variation minimization techniques to remove noise from these images. We perform Monte Carlo simulation to demonstrate that at certain... Read More about Sensitivity improvements for Shack-Hartmann wavefront sensors using total variation minimization.

Wide-field adaptive optics performance in cosmological deep fields for multi-object spectroscopy with the European Extremely Large Telescope (2014)
Journal Article
Basden, A., Evans, C., & Morris, T. (2014). Wide-field adaptive optics performance in cosmological deep fields for multi-object spectroscopy with the European Extremely Large Telescope. Monthly Notices of the Royal Astronomical Society, 445(4), 4008-4014. https://doi.org/10.1093/mnras/stu2022

A multi-object spectrograph on the forthcoming European Extremely Large Telescope will be required to operate with good sky coverage. Many of the interesting deep cosmological fields were deliberately chosen to be free of bright foreground stars, and... Read More about Wide-field adaptive optics performance in cosmological deep fields for multi-object spectroscopy with the European Extremely Large Telescope.

Visible near-diffraction-limited lucky imaging with full-sky laser-assisted adaptive optics (2014)
Journal Article
Basden, A. (2014). Visible near-diffraction-limited lucky imaging with full-sky laser-assisted adaptive optics. Monthly Notices of the Royal Astronomical Society, 442(2), 1142-1150. https://doi.org/10.1093/mnras/stu941

Both lucky imaging techniques and adaptive optics require natural guide stars, limiting sky-coverage, even when laser guide stars are used. Lucky imaging techniques become less successful on larger telescopes unless adaptive optics is used, as the fr... Read More about Visible near-diffraction-limited lucky imaging with full-sky laser-assisted adaptive optics.

Faulty actuator tolerance in deformable mirrors for Extremely Large Telescope multi-object adaptive optics (2014)
Journal Article
Basden, A. (2014). Faulty actuator tolerance in deformable mirrors for Extremely Large Telescope multi-object adaptive optics. Monthly Notices of the Royal Astronomical Society, 440(1), 577-581. https://doi.org/10.1093/mnras/stu315

Planned instruments utilizing multi-object adaptive optics systems on the forthcoming extremely large telescopes require large numbers of high order deformable mirrors. These devices are a significant cost driver, particularly if specifications regar... Read More about Faulty actuator tolerance in deformable mirrors for Extremely Large Telescope multi-object adaptive optics.