詳細

日本語版　フィールドガイド　大気光学

The material in this Field Guide is a condensed version of similar material found in two textbooks: 'Laser Beam Propagation through Random Media' (SPIE Volume PM53) and 'Laser Beam Scintillation with Applications' (SPIE Volume PM99). Topics chosen for this concise presentation include a review of classical Kolmogorov turbulence theory, Gaussian-beam waves in free space, and atmospheric effects on a propagating optical wave. These atmospheric effects have great importance in a variety of applications like imaging, free space optical communications, laser radar, and remote sensing. This Guide presents tractable mathematical models from which the practitioner can readily determine beam spreading, beam wander, spatial coherence radius (Fried's parameter), angle of arrival fluctuations, scintillation, aperture averaging effects, fade probabilities, bit error-rates, and enhanced backscatter effects, among others. 　

Sample Pages(PDF)

Glossary of Symbols
Atmospheric Structure
　　Atmospheric Structure with Altitude
　　Absorption and Scattering
　　Transmittance, Optical Depth, and Visibility
　　Meteorological Phenomena
Kolmogorov Theory of Turbulence
　　Classical Turbulence
　　Velocity Fluctuations
　　Temperature Fluctuations
　　Optical Turbulence
　　Structure Parameter and Inner Scale
　　Cn2 Profile Models
　　Power Spectrum Models
　　Optical Wave Models
　　Paraxial Wave Equation
　　Plane Wave and Spherical Wave Models
　　Gaussian-beam Wave at Transmitter
　　Gaussian-beam Wave at Receiver
　　Hermite-Gaussian Beam Wave
　　Laguerre-Gaussian Beam Wave
　　Example
　　Atmospheric Propagation: Second-order Statistics
　　Rytov Approximation
　　Extended Huygens-Fresnel Principle
　　Parabolic Equation Method
　　Mean Irradiance and Beam Spreading
　　Beam Wander
　　Spatial Coherence Radius: Plane Wave
　　Spatial Coherence Radius: Spherical Wave
　　Spatial Coherence Radius: Gaussian-Beam Wave
　　Fried's Parameter and the Phase Structure Function
　　Angle of Arrival and Image Jitter
　　Examples
Atmospheric Propagation: Fourth-order Statistics
　　Rytov Approximation: Fourth-order Specializations
　　Scintillation Index: Theory
　　Scintillation Index: Plane Wave
　　Scintillation Index: Spherical Wave
　　Scintillation Index: Gaussian-beam Wave
　　Covariance Function: Plane Wave
　　Temporal Power Spectrum: Plane Wave
　　Aperture Averaging: Plane Wave
　　Aperture Averaging: Spherical Wave
　　Example
Imaging Systems and Adaptive Optics
　　Fried's Atmospheric Parameter and Greenwood's Time Constant
　　Point Spread Function and Modulation Transfer Function
　　Spatial Resolution
　　Strehl Ratio and Image Resolving Power
　　Isoplanatic Angle and Point-ahead Angle
　　Zernike Polynomials and Wave Front Representation
　　Zernike Polynomials for Atmospheric Imaging
　　Modal Expansion and Aperture Filter Functions
　　Zernike Tilt, Piston, and Angle-of-Arrival Jitter
Free Space Optical Communication Systems
　　Direct Detection System
　　Threshold Detection
　　Signal-to-noise Ratio: Direct Detection
　　Bit Error-rate
　　Coherent Detection System
　　Signal-to-noise Ratio: Coherent Detection
　　Probability of Fade: Lognormal Model
　　Probability of Fade: Gamma-Gamma Model
　　Lasersatcom: Mean Irradiance and Beam Spreading
　　Lasersatcom: Uplink Scintillation under Weak Fluctuations
　　Lasersatcom: Downlink Scintillation under Weak Fluctuations
　　Lasersatcom: General Theory for Uplink/Downlink Scintillation
　　Lasersatcom: General Theory for Downlink Covariance and Correlation
　　Width
Laser Radar and Optical Remote Sensing
　　Basic Radar Principles
　　Statistical Characteristics of Echo Beam
　　Enhanced Backscatter: Spherical Wave
　　Enhanced Backscatter: Gaussian-beam Wave
　　Spatial Coherence
　　Scintillation Index: Spherical Wave and Point Target
　　Scintillation Index: Gaussian-beam Wave and Point Target
　　Scintillation Index: Smooth Target
　　Scintillation Index: Diffuse Target I
　　Scintillation Index: Diffuse Target II
Appendix
　　Equation Summary
　　Notes
Bibliography
Index