Custom imager as wavefront sensor
نویسنده
چکیده
We report on an integrated Hartmann wavefront sensor (WFS) using passive-pixel architecture and pixels clustered as position-sensitive detectors for dynamic wavefront analysis. Such a device detects the degrees of imperfection (aberrations) of a light beam by measuring the deviation of the incoming wavefront from a reference one. It can be employed either as a diagnostic tool, or in close loop with a wavefront corrector in an Adaptive Optics (AO) system. AO deals with sensing and correcting distortions occurring in optical systems.
منابع مشابه
Fizeau Interferometry Testbed: Wavefront Control
Stellar Imager (SI) is a potential NASA space-based UV imaging interferometer to resolve the stellar disks of nearby stars. SI would consist of 20 30 separate spacecraft flying in formation at the Earth-Sun L2 libration point. Onboard wavefront control would be required to initially align the formation and maintain alignment during science observations and after array reconfiguration. The Fizea...
متن کاملOptical design and characterization of an advanced computational imaging system
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. ABSTRACT We describe an advanced computational imaging system with an optical architecture that enables simultaneou...
متن کاملClosed-loop adaptive optics using a CMOS image quality metric sensor
When compared to the Shack-Hartmann sensor, the image sharpness feedback method has the advantage of easy implementation in a closed-loop adaptive optics system. It also has the potential to be implemented as a smart sensor using VLSI technology. In this paper, we present a novel adaptive optics testbed that uses a CMOS sharpness imager built in the New Mexico State University (NMSU) Electro-op...
متن کاملProgress with Adaptive Optics Testbeds at the UCO/Lick Observatory Laboratory for Adaptive Optics
We report on experimental results with adaptive optics testbeds at the UCO/Lick Observatory. One testbed is dedicated to high contrast AO imaging and is a prototype for a ground-based extrasolar planet imager for the Gemini telescope. The second testbed is dedicated to developing concepts and architectures for multilaser guidestar tomography in wide-field AO applications. Such systems are now u...
متن کاملOn-eye performance of custom wavefront-guided soft contact lenses in a habitual soft lens-wearing keratoconic patient.
PURPOSE To assess visual, optical, and fitting characteristics for wavefront-guided soft contact lenses produced for one habitual soft lens-wearing moderate keratoconic eye. METHODS A process for production and evaluation of custom wavefront-guided soft contact lenses was developed. Wavefront aberrations were quantified with the COAS-HD wavefront sensor (Wavefront Sciences); soft contact lens...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2001