Wave-front sensing for adaptive optics in astronomy

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9783639024456: Wave-front sensing for adaptive optics in astronomy
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Since the invention of the telescope, astronomers have been ableto view fainter and smaller objects in the sky. The mainlimitation to the quality of the images obtained has been, untilrecently, the presence of turbulence in the atmosphere. Tomitigate the effects of the turbulence, adaptive optics systemshave been successfully implemented. Adaptive optics relies uponmeasuring the distortion of the wave-front caused by theatmospheric turbulence, called wave-front sensing, andcompensating for it in an adaptive fashion. The aim of this thesisis to provide a summary of the state-of-the-art of wave-frontsensing and to describe my contributions to the field.The most significant result in the thesis is the derivation of a new wave-front sensing technique.This approach uses the geometric optics approximation, which considers light to travelperpendicular to the wave-front. Consequently, a wave-front slope in a region of the telescopeaperture causes the displacement of a ray of light passing through that region. By taking twodefocused images, it is possible to deduce how the light intensity changed from one image to theother.

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Marcos van Dam was born in Buenos Aires, Argentina on July 11, 1976. He holds a B.Sc., a B.E. (Hons) and a Ph.D, all from the University of Canterbury, Christchurch, New Zealand.

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Van Dam, Marcos
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Book Description Condition: New. Publisher/Verlag: VDM Verlag Dr. Müller | Since the invention of the telescope, astronomers have been able to view fainter and smaller objects in the sky. The main limitation to the quality of the images obtained has been, until recently, the presence of turbulence in the atmosphere. To mitigate the effects of the turbulence, adaptive optics systems have been successfully implemented. Adaptive optics relies upon measuring the distortion of the wave-front caused by the atmospheric turbulence, called wave-front sensing, and compensating for it in an adaptive fashion. The aim of this thesis is to provide a summary of the state-of-the-art of wave-front sensing and to describe my contributions to the field. The most significant result in the thesis is the derivation of a new wave-front sensing technique. This approach uses the geometric optics approximation, which considers light to travel perpendicular to the wave-front. Consequently, a wave-front slope in a region of the telescope aperture causes the displacement of a ray of light passing through that region. By taking two defocused images, it is possible todeduce how the light intensity changed from one image to the other. | Format: Paperback | Language/Sprache: english | 335 gr | 244 pp. Seller Inventory # K9783639024456

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Book Description VDM Verlag Jun 2008, 2008. Taschenbuch. Condition: Neu. Neuware - Since the invention of the telescope, astronomers have been able to view fainter and smaller objects in the sky. The main limitation to the quality of the images obtained has been, until recently, the presence of turbulence in the atmosphere. To mitigate the effects of the turbulence, adaptive optics systems have been successfully implemented. Adaptive optics relies upon measuring the distortion of the wave-front caused by the atmospheric turbulence, called wave-front sensing, and compensating for it in an adaptive fashion. The aim of this thesis is to provide a summary of the state-of-the-art of wave-front sensing and to describe my contributions to the field. The most significant result in the thesis is the derivation of a new wave-front sensing technique. This approach uses the geometric optics approximation, which considers light to travel perpendicular to the wave-front. Consequently, a wave-front slope in a region of the telescope aperture causes the displacement of a ray of light passing through that region. By taking two defocused images, it is possible todeduce how the light intensity changed from one image to the other. 244 pp. Englisch. Seller Inventory # 9783639024456

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Book Description VDM Verlag Jun 2008, 2008. Taschenbuch. Condition: Neu. Neuware - Since the invention of the telescope, astronomers have been able to view fainter and smaller objects in the sky. The main limitation to the quality of the images obtained has been, until recently, the presence of turbulence in the atmosphere. To mitigate the effects of the turbulence, adaptive optics systems have been successfully implemented. Adaptive optics relies upon measuring the distortion of the wave-front caused by the atmospheric turbulence, called wave-front sensing, and compensating for it in an adaptive fashion. The aim of this thesis is to provide a summary of the state-of-the-art of wave-front sensing and to describe my contributions to the field. The most significant result in the thesis is the derivation of a new wave-front sensing technique. This approach uses the geometric optics approximation, which considers light to travel perpendicular to the wave-front. Consequently, a wave-front slope in a region of the telescope aperture causes the displacement of a ray of light passing through that region. By taking two defocused images, it is possible todeduce how the light intensity changed from one image to the other. 244 pp. Englisch. Seller Inventory # 9783639024456

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Book Description VDM Verlag Dr. Mueller e.K., Germany, 2008. Paperback. Condition: New. Language: English . Brand New Book ***** Print on Demand *****.Since the invention of the telescope, astronomers have been able to view fainter and smaller objects in the sky. The main limitation to the quality of the images obtained has been, until recently, the presence of turbulence in the atmosphere. To mitigate the effects of the turbulence, adaptive optics systems have been successfully implemented. Adaptive optics relies upon measuring the distortion of the wave-front caused by the atmospheric turbulence, called wave-front sensing, and compensating for it in an adaptive fashion. The aim of this thesis is to provide a summary of the state-of-the-art of wave-front sensing and to describe my contributions to the field. The most significant result in the thesis is the derivation of a new wave-front sensing technique. This approach uses the geometric optics approximation, which considers light to travel perpendicular to the wave-front. Consequently, a wave-front slope in a region of the telescope aperture causes the displacement of a ray of light passing through that region. By taking two defocused images, it is possible to deduce how the light intensity changed from one image to the other. Seller Inventory # AAV9783639024456

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Book Description VDM Verlag Jun 2008, 2008. Taschenbuch. Condition: Neu. This item is printed on demand - Print on Demand Neuware - Since the invention of the telescope, astronomers have been able to view fainter and smaller objects in the sky. The main limitation to the quality of the images obtained has been, until recently, the presence of turbulence in the atmosphere. To mitigate the effects of the turbulence, adaptive optics systems have been successfully implemented. Adaptive optics relies upon measuring the distortion of the wave-front caused by the atmospheric turbulence, called wave-front sensing, and compensating for it in an adaptive fashion. The aim of this thesis is to provide a summary of the state-of-the-art of wave-front sensing and to describe my contributions to the field. The most significant result in the thesis is the derivation of a new wave-front sensing technique. This approach uses the geometric optics approximation, which considers light to travel perpendicular to the wave-front. Consequently, a wave-front slope in a region of the telescope aperture causes the displacement of a ray of light passing through that region. By taking two defocused images, it is possible todeduce how the light intensity changed from one image to the other. 244 pp. Englisch. Seller Inventory # 9783639024456

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