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Rao , T. Hessian-LoG filtering for enhancement and detection of photoreceptor cells in adaptive optics retinal images.

Telescope Adaptive Optics - With Prof Simon

Anfisa Lazareva , P. Liatsis , Franziska G.

UCL Astrophysics Group - UCL - London's Global University

An automated image processing system for the detection of photoreceptor cells in adaptive optics retinal images Anfisa Lazareva , Panos Liatsis , Franziska G. Wavefront error correction with adaptive optics in diabetic retinopathy.

Marginal blind deconvolution of adaptive optics retinal images. Leonardo E.

Astrophysics Group, Department of Physics and Astronomy

Blanco , Laurent M. Partially compensated deconvolution from wavefront sensing images of the eye fundus Justo Arines. Related Papers. By clicking accept or continuing to use the site, you agree to the terms outlined in our Privacy Policy , Terms of Service , and Dataset License.


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Skip to main content. Program Phase Year:. DoD Topic Number:. Release Date: November 28, Open Date: January 08, Application Due Date: February 06, Close Date: February 06, Such systems are well known for astronomical applications, but implementation and performance in a high energy laser HEL weapon system is still not well known.

Adaptive optics

Adaptive optics in HEL systems typically consist of a beacon illuminator laser that creates a non-cooperative beacon spot on the target that is imaged back through the main HEL telescope onto a wavefront sensor. The measured atmospheric distortions are then relayed onto a correction device such as a deformable mirror and the HEL beam is corrected before exiting the main telescope of the HEL. One issue with this approach in deep turbulence is the ability to measure phase when a branch point, or two pi phase shift occurs across the wavefront and the phase cannot be measured with conventional methods.


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Several approaches have been theorized to measure the branch points, but are impractical to implement into a HEL weapon system because the hardware necessary to implement them does not exist or is too large and complicated to integrate into a tactical system. For example, self-referencing interferometers and digital holography wavefront sensing has been modeled and demonstrated in a lab environment, but would require a beacon illuminator of powers that do not exists today.


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  7. This solicitation in interested in adaptive optics systems that are capable of detecting and compensating for atmospheric conditions that include branch points while still operating in the constraints of a HEL weapon system. The volume for all hardware other than optics in the main HEL beam train to include electronic drivers and racks, illuminator lasers, chillers, etc. Optical components and sensors added to the main HEL optical bench shall be minimal and not require more than approximately 2 square feet additional space.