Aero Optical Effects
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Aero Optical Effects
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Author : Stanislav Gordeyev
language : en
Publisher: John Wiley & Sons
Release Date : 2023-03-01
Aero Optical Effects written by Stanislav Gordeyev and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-03-01 with Science categories.
AERO-OPTICAL EFFECTS Explore the newest techniques and technologies used to mitigate the effects of air flow over airborne laser platforms Aero-Optical Effects: Physics, Analysis and Mitigation delivers a detailed and insightful introduction to aero-optics and fully describes the current understanding of the physical causes of aero-optical effects from turbulent flows at different speeds. In addition to presenting a thorough discussion of instrumentation, data reduction, and data analysis, the authors examine various approaches to aero-optical effect mitigation using both flow control and adaptive optics approaches. The book explores the sources, characteristics, measurement approaches, and mitigation means to reduce aero-optics wavefront error. It also examines the precise measurements of aero-optical effects and the instrumentation of aero-optics. Flow control for aero-optical applications is discussed, as are approaches like passive flow control, active and hybrid flow control, and closed-loop flow control. Readers will benefit from discussions of the applications of aero-optics in relation to fields like directed energy and high-speed communications. Readers will also enjoy a wide variety of useful features and topics, including: Comprehensive discussions of both aero-effects, which include the effects that air flow has over a beam director mounted on an aircraft, and aero-optics, which include atmospheric effects that degrade the ability of an airborne laser to focus a beam A treatment of air buffeting and its effects on beam stabilization and jitter An analysis of mitigating impediments to the use of high-quality laser beams from aircraft as weapons or communications systems Adaptive optics compensation for aero-optical disturbances Perfect for researchers, engineers, and scientists involved with laser weapon and beam control systems, Aero-Optical Effects: Physics, Analysis and Mitigation will also earn a place in the libraries of principal investigators in defense contract work and independent research and development.
Measurements Of Aero Optical Effects In A Plane Shear Layer
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Author : Miodrag Oljaca
language : en
Publisher:
Release Date : 1997
Measurements Of Aero Optical Effects In A Plane Shear Layer written by Miodrag Oljaca and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.
Near And Far Field Measurements Of Aero Optical Effects Due To Propagation Through Hypersonic Flows
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Author : William J. Yanta
language : en
Publisher:
Release Date : 2000
Near And Far Field Measurements Of Aero Optical Effects Due To Propagation Through Hypersonic Flows written by William J. Yanta and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with categories.
Aero Optical Effects
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Author : Stanislav Gordeyev
language : en
Publisher: John Wiley & Sons
Release Date : 2023-01-04
Aero Optical Effects written by Stanislav Gordeyev and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-01-04 with Science categories.
AERO-OPTICAL EFFECTS Explore the newest techniques and technologies used to mitigate the effects of air flow over airborne laser platforms Aero-Optical Effects: Physics, Analysis and Mitigation delivers a detailed and insightful introduction to aero-optics and fully describes the current understanding of the physical causes of aero-optical effects from turbulent flows at different speeds. In addition to presenting a thorough discussion of instrumentation, data reduction, and data analysis, the authors examine various approaches to aero-optical effect mitigation using both flow control and adaptive optics approaches. The book explores the sources, characteristics, measurement approaches, and mitigation means to reduce aero-optics wavefront error. It also examines the precise measurements of aero-optical effects and the instrumentation of aero-optics. Flow control for aero-optical applications is discussed, as are approaches like passive flow control, active and hybrid flow control, and closed-loop flow control. Readers will benefit from discussions of the applications of aero-optics in relation to fields like directed energy and high-speed communications. Readers will also enjoy a wide variety of useful features and topics, including: Comprehensive discussions of both aero-effects, which include the effects that air flow has over a beam director mounted on an aircraft, and aero-optics, which include atmospheric effects that degrade the ability of an airborne laser to focus a beam A treatment of air buffeting and its effects on beam stabilization and jitter An analysis of mitigating impediments to the use of high-quality laser beams from aircraft as weapons or communications systems Adaptive optics compensation for aero-optical disturbances Perfect for researchers, engineers, and scientists involved with laser weapon and beam control systems, Aero-Optical Effects: Physics, Analysis and Mitigation will also earn a place in the libraries of principal investigators in defense contract work and independent research and development.
Spatial Phase Shifting Interferometry For Measurement Of Aero Optical Effects
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Author : Dean M. Shough
language : en
Publisher:
Release Date : 1992
Spatial Phase Shifting Interferometry For Measurement Of Aero Optical Effects written by Dean M. Shough and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with categories.
Whole Field Measurements Of Turbulent Flow For The Study Of Aero Optical Effects
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Author :
language : en
Publisher:
Release Date : 1998
Whole Field Measurements Of Turbulent Flow For The Study Of Aero Optical Effects written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.
Aerooptical phenomena associated with the propagation of optical beams and imaging through turbulent index-of-refraction fields have been investigated. Using simultaneous imaging of optical-beam distortion and the turbulent index-or-refraction field, we have documented near-field behavior, following propagation through moderate-to-high Reynolds number jets and shear layers. For both flows, propagation through turbulence may result in the formation of caustics. Preliminary measurements using the Palomar 200" telescope confirm the formation of caustics in atmospheric propagation, using bright stars as sources. Spatial wavefront and wavefront-tilt measurements of beams emerging from jet and shear layer regions exhibit non-Kolmogorov behavior. Preliminary efforts to reconstruct images through turbulence indicate the need for both amplitude and wavefront-tilt measurements for reliable image reconstruction.
Schlieren Systems Analysisfor Investigation Of Aero Optical Effects In Refractive Turbulent Flows
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Author : Boris Zakharin
language : en
Publisher:
Release Date : 2004
Schlieren Systems Analysisfor Investigation Of Aero Optical Effects In Refractive Turbulent Flows written by Boris Zakharin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
Aero Optics Analysis
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Author :
language : en
Publisher:
Release Date : 1991
Aero Optics Analysis written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with categories.
The U.S. Army Strategic Defense Command (USASDC) has several ongoing and planned programs that utilize optical sensors aboard missiles traveling at hypersonic velocities in the atmosphere. Central to the missile homing problem are aero-optical effects upon a missile-born sensor/seeker which looks through both an electromagnetic window and the flow field about the vehicle. Aspects of the problem include modeling and simulation of the flow field on incident radiation from a target, and finally, predicting the resultant image imperfections and error in apparent object position as perceived by the sensor.
Aero Optical Demonstration Test In The Aedc Hypervelocity Wind Tunnel 9
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Author :
language : en
Publisher:
Release Date : 1999
Aero Optical Demonstration Test In The Aedc Hypervelocity Wind Tunnel 9 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with categories.
Hypersonic endo-atmospheric interceptors must maneuver over a variety of flight environments. Generally, these interceptor missions require flight below Mach 8 for some portion of the mission. Hypervelocity intercepts can occur at high altitudes but are more stressing at the lower altitude, high Reynolds number conditions. To obtain the high accuracy needed for hit-to-kill, endo-atmospheric interceptors use optically based seeker systems. These optical seekers rely on precise knowledge of the interceptor position to select an aimpoint. Optical aberrations caused by hypersonic flight can distort or shift the image position on the focal plane enough to add uncertainty in the position and cause the interceptor to miss. These image distortions are typically referred to as aero-optical effects. To lower risk to the program, the thermal and structural response and the optical aberrations on the seeker window should be assessed through ground testing. This type of ground testing is dependent on duplicating flight parameters. In addition, thermal/structural testing requires long run times consistent with end-game scenarios. Evaluation of interceptor performance in a ground test facility that can provide full flight duplication for seconds of run time will greatly reduce risk to these programs. An aero-optics test capability has been demonstrated in Hypervelocity Wind Tunnel 9 (Tunnel 9) at the Arnold Engineering Development Center (AEDC). In this facility, flight aerodynamic conditions can be matched for run times of 6 seconds, thereby duplicating the aerothermal/structural response of the window. This facility creates an ideal environment to characterize and evaluate seeker system aero-optical effects. This paper outlines the significant verification and validation processes developed for feasibility demonstration. It provides an overview of the important aspects and results of the program to date.
Aperture Effects On The Aero Optical Distortions Measured For A Compressible Shear Layer
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Author : Edward J. Fitzgerald
language : en
Publisher:
Release Date : 2000
Aperture Effects On The Aero Optical Distortions Measured For A Compressible Shear Layer written by Edward J. Fitzgerald and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with categories.