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Outputs (1101)

The E-ELT first light spectrograph HARMONI: capabilities and modes (2016)
Presentation / Conference Contribution
Thatte, N. A., Clarke, F., Bryson, I., Shnetler, H., Tecza, M., Fusco, T., …Evans, C. J. (2016). The E-ELT first light spectrograph HARMONI: capabilities and modes. In L. Simard, H. Takami, & C. J. Evans (Eds.), Proceedings Volume 9908, Ground-based and Airborne Instrumentation for Astronomy VI. https://doi.org/10.1117/12.2230629

HARMONI is the E-ELT’s first light visible and near-infrared integral field spectrograph. It will provide four different spatial scales, ranging from coarse spaxels of 60 × 30 mas best suited for seeing limited observations, to 4 mas spaxels that Nyq... Read More about The E-ELT first light spectrograph HARMONI: capabilities and modes.

A four mirror anastigmat collimator design for optical payload calibration (2016)
Presentation / Conference Contribution
Rolt, S., Calcines, A., Lomanowski, B. A., & Bramall, D. G. (2016). A four mirror anastigmat collimator design for optical payload calibration. In H. A. MacEwen, G. G. Fazio, M. Lystrup, N. Batalha, N. Siegler, & E. C. Tong (Eds.), Proceedings Volume 9904, Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave. https://doi.org/10.1117/12.2232327

We present here a four mirror anastigmatic optical collimator design intended for the calibration of an earth observation satellite instrument. Specifically, the collimator is to be applied to the ground based calibration of the Sentinel-4/UVN instru... Read More about A four mirror anastigmat collimator design for optical payload calibration.

The integral field unit for the James Webb space telescope's near-infrared spectrograph (2017)
Presentation / Conference Contribution
Purll, D. J., Lobb, D. R., Barnes, A. R., Talbot, R. G., Rolt, S., Robertson, D. J., …Karafolas, N. (2017). The integral field unit for the James Webb space telescope's near-infrared spectrograph. In International Conference on Space Optics—ICSO 2010, Rhodes Island, Greece, 4–8 October 2010. https://doi.org/10.1117/12.2309221

The European Space Agency (ESA) is providing the Near Infrared Spectrograph (NIRSpec) developed by EADS Astrium GmbH to fly on the James Webb Space Telescope (JWST). NIRSpec covers the 0.6-5.0 µm domain. It will be primarily operated as a multi-objec... Read More about The integral field unit for the James Webb space telescope's near-infrared spectrograph.

Photometry and Spectrum measurements of the Laser Guide Star beam emission at Observatorio del Roque de Los Muchachos with the Gran Telescope Canarias (2017)
Presentation / Conference Contribution
Lombardi, G., Calia, B., Centrone, M., Talavera, M. R. G., Morris, T., Pfrommer, T., …Postigoh, A. D. U. (2017). Photometry and Spectrum measurements of the Laser Guide Star beam emission at Observatorio del Roque de Los Muchachos with the Gran Telescope Canarias. In Proceedings of the Adaptive Optics for Extremely Large Telescopes 5 (AO4ELT5) : Tenerife, Canary Islands, Spain, June 25-30, 2017 (1-7). https://doi.org/10.26698/ao4elt5.0045

In the past years ESO has built together with industry a transportable Laser Guide Star Unit (WLGSU) to test the laser technology while supporting some strategic experiments for the LGS-AO technologies. Since July 2016, the WLGSU has been installed a... Read More about Photometry and Spectrum measurements of the Laser Guide Star beam emission at Observatorio del Roque de Los Muchachos with the Gran Telescope Canarias.

Overview, design, and flight results from SuperBIT: a high-resolution, wide-field, visible-to-near-UV balloon-borne astronomical telescope (2018)
Presentation / Conference Contribution
Romualdez, L., Benton, S., Brown, A., Clark, P., Damaren, C., Eifler, T., …Tam, S. (2018). Overview, design, and flight results from SuperBIT: a high-resolution, wide-field, visible-to-near-UV balloon-borne astronomical telescope. In H. Takami, C. J. Evans, & L. Simard (Eds.), Proceedings of SPIE, Ground-based and Airborne Instrumentation for Astronomy VII. https://doi.org/10.1117/12.2307754

Balloon-borne astronomy is a unique tool that allows for a level of image stability and significantly reduced atmospheric interference without the often prohibitive cost and long development time-scale that are characteristic of space-borne facility-... Read More about Overview, design, and flight results from SuperBIT: a high-resolution, wide-field, visible-to-near-UV balloon-borne astronomical telescope.

AO modal optimization in a live, beating zebrafish heart (2013)
Presentation / Conference Contribution
Bourgenot, C., Taylor, J. M., Saunter, C. D., Girkin, J. M., & Love, G. D. (2013). AO modal optimization in a live, beating zebrafish heart. . https://doi.org/10.1364/aopt.2013.ow4a.4

We report on the combinated use of heart synchronization and wavefront sensorless modal AO to enable significant improvement in image quality of a live transgenic zebrafish embryo heart, imaged with a light sheet microscope.

Wide field adaptive optics microscopy using both closed loop correction and image sharpness optimization (2011)
Presentation / Conference Contribution
Bourgenot, C., Love, G. D., Saunter, C. D., & Girkin, J. M. (2011). Wide field adaptive optics microscopy using both closed loop correction and image sharpness optimization. . https://doi.org/10.1364/aopt.2011.jtua2

We report on results from a wide field microscope fitted with adaptive optics. We describe results based on both image optimization (wavefront sensorless adaptive optics) and full closed loop correction.

Light sheet adaptive optics microscope for 3D live imaging (2013)
Presentation / Conference Contribution
Bourgenot, C., Taylor, J., Saunter, C., Girkin, J., & Love, G. (2013). Light sheet adaptive optics microscope for 3D live imaging. In C. J. Cogswell (Ed.), . https://doi.org/10.1117/12.2002057

We report on the incorporation of adaptive optics (AO) into the imaging arm of a selective plane illumination microscope (SPIM). SPIM has recently emerged as an important tool for life science research due to its ability to deliver high-speed, optica... Read More about Light sheet adaptive optics microscope for 3D live imaging.

Feasibility study of an image slicer for future space application (2014)
Presentation / Conference Contribution
Calcines, A., & Ichimoto, K. (2014). Feasibility study of an image slicer for future space application. In J. M. Oschmann Jr., M. Clampin, G. G. Fazio, & H. A. MacEwen (Eds.), Proceedings Volume 9143, Space Telescopes and Instrumentation 2014: Optical, Infrared, and Millimeter Wave. https://doi.org/10.1117/12.2053580

This communication presents the feasibility study of an image slicer for future space missions, especially for the integral field unit (IFU) of the SUVIT (Solar UV-Visible-IR telescope) spectro-polarimeter on board the Japanese-led solar space missio... Read More about Feasibility study of an image slicer for future space application.

New opportunities of freeform gratings using diamond machining (2018)
Presentation / Conference Contribution
Bourgenot, C., Calcines, A., & Sharples, R. M. (2018). New opportunities of freeform gratings using diamond machining. In R. Navarro, & R. Geyl (Eds.), Proceedings Volume 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III. https://doi.org/10.1117/12.2312040

With the recent development of new ultra fine aluminium alloys and progress in the field of directly machined freeform surfaces, diamond machined freeform gratings could play an important part in future spectrographs or integral field units, particul... Read More about New opportunities of freeform gratings using diamond machining.

Reducing the Field of View in Correlating Wavefront Sensors for Solar Adaptive Optics (2017)
Presentation / Conference Contribution
Townson, M. J., & Saunter, C. D. (2017). Reducing the Field of View in Correlating Wavefront Sensors for Solar Adaptive Optics. In Proceedings of the Adaptive Optics for Extremely Large Telescopes 5 (AO4ELT5) : Tenerife, Canary Islands, Spain, June 25-30, 2017. https://doi.org/10.26698/ao4elt5.0156

Wavefront sensing for solar adaptive optics currently requires the use of extended-field Shack-Hartmann wavefront sensors. Such wavefront sensors suffer from a reduced sensitivity to high altitude turbulence due effects of measuring wavefront gradien... Read More about Reducing the Field of View in Correlating Wavefront Sensors for Solar Adaptive Optics.

MOSAIC optical relay module: optical design, performance, and flexure analysis (2018)
Presentation / Conference Contribution
Calcines, A., Dubbeldam, M., Morris, T. J., Fitzsimons, E., Schnetler, H., Cohen, M., & Amans, J. (2018). MOSAIC optical relay module: optical design, performance, and flexure analysis. In C. J. Evans, L. Simard, & H. Takami (Eds.), Proceedings Volume 10702, Ground-based and Airborne Instrumentation for Astronomy VII. https://doi.org/10.1117/12.2313481

The Optical Relay Module of the MOSAIC multiple-object spectrograph is used to relay 400-1800nm light picked off from the ELT focal plane to either a fibre-based integral field unit or a natural guide star wavefront sensor. Here we present the prelim... Read More about MOSAIC optical relay module: optical design, performance, and flexure analysis.

Preliminary on-sky results of the CANARY experiment with an ELT-elongated sodium LGS (2017)
Presentation / Conference Contribution
Bardou, L., Gendron, E., Rousset, G., Gratadour, D., Basden, A. G., Bonaccini, D., …Reyes Garcia-Talavera, M. (2017). Preliminary on-sky results of the CANARY experiment with an ELT-elongated sodium LGS. In Proceedings of the Adaptive Optics for Extremely Large Telescopes 5 (AO4ELT5) : Tenerife, Canary Islands, Spain, June 25-30, 2017. https://doi.org/10.26698/ao4elt5.0126

We present on-sky results of wavefront sensing on an elongated LGS. These results are derived from observations made with the multi-object AO demonstrator CANARY on the William Herschel Telescope (WHT) in La Palma. The laser guide star is produced us... Read More about Preliminary on-sky results of the CANARY experiment with an ELT-elongated sodium LGS.

Design of freeform diffraction gratings: performance, limitations and potential applications (2018)
Presentation / Conference Contribution
Calcines, A., Bourgenot, C., & Sharples, R. M. (2018). Design of freeform diffraction gratings: performance, limitations and potential applications. In R. Navarro, & R. Geyl (Eds.), Proceedings Volume 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III. https://doi.org/10.1117/12.2312125

Spectroscopy is a key technique in astronomy and nowadays most major telescopes include at least one spectrograph in their instrument suite. The dispersive element is one of the most important components and it defines the pupil size, spectral resolu... Read More about Design of freeform diffraction gratings: performance, limitations and potential applications.

Closed loop adaptive optics with a laser guide star for biological light microscopy (2012)
Presentation / Conference Contribution
Saunter, C. D., Bourgenot, C., Girkin, J. M., & Love, G. D. (2012). Closed loop adaptive optics with a laser guide star for biological light microscopy. In S. S. Oliver, T. G. Bifano, & J. Kubby (Eds.), . https://doi.org/10.1117/12.909927

We report on the development of a widefield microscope that achieves adaptive optics correction through the use of a wavefront sensor observing an artificial laser guide star induced within the sample. By generating this guide star at arbitrary posit... Read More about Closed loop adaptive optics with a laser guide star for biological light microscopy.

Realtime wavefront sensing in a SPIM microscope, and active aberration tracking (2015)
Presentation / Conference Contribution
Taylor, J. M., Saunter, C. D., Bourgenot, C., Girkin, J. M., & Love, G. D. (2015). Realtime wavefront sensing in a SPIM microscope, and active aberration tracking. In T. G. Bifano, J. Kubby, & S. Gigan (Eds.), . https://doi.org/10.1117/12.2080061

Adaptive optics (AO) can potentially allow high resolution imaging deep inside living tissue, mitigating against the loss of resolution due to aberrations caused by overlying tissue. Closed-loop AO correction is particularly attractive for moving tis... Read More about Realtime wavefront sensing in a SPIM microscope, and active aberration tracking.

Diamond machining of a single shot ellipsoidal focusing plasma mirror (2016)
Presentation / Conference Contribution
Bourgenot, C., Crosby, D., & Robertson, D. (2016). Diamond machining of a single shot ellipsoidal focusing plasma mirror. In J. Kovacicinova (Ed.), Optics and Measurement International Conference 2016. https://doi.org/10.1117/12.2257414

Plasma mirrors have become an important tool in high power laser physics due to their ability to suppress laser pre-pulses and amplified spontaneous emission allowing a cleaner and sharper rising edge pulse to be focused onto a target. A PMMA ellipso... Read More about Diamond machining of a single shot ellipsoidal focusing plasma mirror.

Towards freeform curved blazed gratings using diamond machining (2016)
Presentation / Conference Contribution
Bourgenot, C., Robertson, D., Stelter, D., & Eikenberry, S. (2016). Towards freeform curved blazed gratings using diamond machining. In R. Navarro, & J. H. Burge (Eds.), Advances in optical and mechanical technologies for telescopes and instrumentation II. https://doi.org/10.1117/12.2231182

Concave blazed gratings greatly simplify the architecture of spectrographs by reducing the number of optical components. The production of these gratings using diamond-machining offers practically no limits in the design of the grating substrate shap... Read More about Towards freeform curved blazed gratings using diamond machining.