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All Outputs (23)

New opportunities of freeform gratings using diamond machining (2018)
Presentation / Conference Contribution
Bourgenot, C., Calcines, A., & Sharples, R. M. (2018, December). New opportunities of freeform gratings using diamond machining. Presented at Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III: SPIE Astronomical Telescopes + Instrumentation 2018, Austin, Texas

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.

Design of freeform diffraction gratings: performance, limitations and potential applications (2018)
Presentation / Conference Contribution
Calcines, A., Bourgenot, C., & Sharples, R. M. (2018, June). Design of freeform diffraction gratings: performance, limitations and potential applications. Presented at Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III: SPIE Astronomical Telescopes + Instrumentation 2018, Austin, Texas

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.

Design, manufacture, and evaluation of prototype telescope windows for use in low-vision aids (2017)
Presentation / Conference Contribution
Young, L., Robertson, D., Love, G., Girkin, J., Cowie, E., Bourgenot, C., & Courtial, J. (2017, November). Design, manufacture, and evaluation of prototype telescope windows for use in low-vision aids. Presented at Novel Optical Systems Design and Optimization XX, San Diego, California

Pixellated Optics, a class of optical devices which preserve phase front continuity only over small sub areas of the device, allow for a range of uses that would not otherwise be possible. One potential use is as Low Vision Aids (LVAs), where they ar... Read More about Design, manufacture, and evaluation of prototype telescope windows for use in low-vision aids.

Diamond machining of a single shot ellipsoidal focusing plasma mirror (2016)
Presentation / Conference Contribution
Bourgenot, C., Crosby, D., & Robertson, D. (2017, January). Diamond machining of a single shot ellipsoidal focusing plasma mirror. Presented at Optics and Measurement International Conference 2016, Liberec

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, October). Towards freeform curved blazed gratings using diamond machining. Presented at Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, Edinburgh, Scotland

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.

Resolution limits of pixellated optical components (2016)
Presentation / Conference Contribution
Cowie, E. N., Bourgenot, C., Robertson, D., & Courtial, J. (2016, December). Resolution limits of pixellated optical components. Presented at Novel Optical Systems Design and Optimization XIX, San Diego, California

Pixellated optical components, for example generalised confocal lenslet arrays (GCLAs), enable the design of optical devices which cannot be realised without introducing pixellation or a similar compromise. A key concern is the degradation of imaging... Read More about Resolution limits of pixellated optical components.

CHOUGH: implementation and performance of a high-order 4m AO demonstrator (2016)
Presentation / Conference Contribution
Bharmal, N. A., Basden, A. G., Bourgenot, C. J., Black, M., Dubbeldam, C. M., Henry, D. M., Hölck-Santibanez, D., Morris, T. J., Robertson, D. J., Schmoll, J., Talbot, R. G., Younger, E. J., & Myers, R. M. (2016, July). CHOUGH: implementation and performance of a high-order 4m AO demonstrator. Presented at Adaptive Optics Systems V, Edinburgh

CHOUGH is a small, fast project to provide an experimental on-sky high-order SCAO capability to the 4.2m WHT telescope. The basic goal has r0-sized sub- apertures with the aim of achieving high-Strehl ratios (> 0:5) in the visible (> 650 nm). It achi... Read More about CHOUGH: implementation and performance of a high-order 4m AO demonstrator.

Progress towards building pixelated transformation-optics devices (2015)
Presentation / Conference Contribution
Cowie, E., Bourgenot, C., Robertson, D. J., & Courtial, J. K. (2015, December). Progress towards building pixelated transformation-optics devices. Presented at Frontiers in Optics 2015, San Jose, California

We report progress in the design and manufacture of micro-structured surfaces that change the direction of transmitted light rays. Such pixellated generalised refraction is general enough to design pixellated transformation-optics devices.

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, February). Realtime wavefront sensing in a SPIM microscope, and active aberration tracking. Presented at Adaptive Optics and Wavefront Control for Biological Systems, San Francisco, CA

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.

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, June). AO modal optimization in a live, beating zebrafish heart. Presented at Imaging and Applied Optics Postdeadline, Arlington, Virginia, United States

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.

Light sheet adaptive optics microscope for 3D live imaging (2013)
Presentation / Conference Contribution
Bourgenot, C., Taylor, J., Saunter, C., Girkin, J., & Love, G. (2013, February). Light sheet adaptive optics microscope for 3D live imaging. Presented at Three-Dimensional and Multidimensional Microscopy: Image Acquisition and Processing XX, San Francisco, California, USA

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.

Adaptive optical methods for in vivo imaging in developing Zebra fish (2012)
Presentation / Conference Contribution
Girkin, J., Taylor, J., Bourgenot, C., Saunter, C., & Love, G. (2012, December). Adaptive optical methods for in vivo imaging in developing Zebra fish. Presented at 2012 International Symposium on Optomechatronic Technologies (ISOT 2012), Paris

The humble Zebra fish is rapidly establishing itself as the model of choice for a wide range of biological investigations, in particular at the developing embryo stage. Single Plane Illumination Microscopy (SPIM) has already been shown to be a very p... Read More about Adaptive optical methods for in vivo imaging in developing Zebra fish.

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, January). Closed loop adaptive optics with a laser guide star for biological light microscopy. Presented at MEMS Adaptive Optics VI, San Francisco, CA

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.

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, July). Wide field adaptive optics microscopy using both closed loop correction and image sharpness optimization. Presented at Imaging and Applied Optics, Toronto, Canada

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.

Adaptive optics for wide-field microscopy (2011)
Presentation / Conference Contribution
Bourgenot, C., Saunter, C., Girkin, J., & Love, G. (2011, January). Adaptive optics for wide-field microscopy. Presented at Three-Dimensional and Multidimensional Microscopy: Image Acquisition and Processing XVIII, San Francisco, CA

We report on recent developments in the use of adaptive optics (AO) in wide-field microscopy to remove both system and sample induced aberrations. We describe progress on using both a full AO system and image optimization techniques (wavefront sensor... Read More about Adaptive optics for wide-field microscopy.

Lightweight, aluminum, mirror design optimization for conventional and additive manufacturing processes
Presentation / Conference Contribution
Paenoi, J., Bourgenot, C. J., Atkins, C., Snell, R. M., Todd, I., White, P., Parkin, K., Ryder, D., Kotlewski, R., McPhee, S., Chanchaiworawit, K., Chartsiriwattana, P., Laoyang, A., Kuha, T., Leckngam, A., Buisset, C., Rujopakarn, W., & Poshyachinda, S. (2022, December). Lightweight, aluminum, mirror design optimization for conventional and additive manufacturing processes. Presented at Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation V

The LR-IFU for GNIRS at Gemini North : optical component manufacturing and metrology
Presentation / Conference Contribution
Bourgenot, C. J., Calcines-Rosario, A. Z., DubbelDam, C. M., Sharples, R. M., Diaz, R., & Stephens, A. W. (2022, December). The LR-IFU for GNIRS at Gemini North : optical component manufacturing and metrology. Presented at Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation V

Weighing exo-atmospheres: a novel mid-resolution spectral mode for SCALES
Presentation / Conference Contribution
Stelter, R., Skemer, A. J., Kupke, R., Bourgenot, C., Martinez, R. A., & Sallum, S. S. (2022, December). Weighing exo-atmospheres: a novel mid-resolution spectral mode for SCALES. Presented at Ground-based and Airborne Instrumentation for Astronomy IX