手法を比較

	フーリエ光学	ビーム伝搬法
分野	光学	光学
系統	Process / pipeline	Process / pipeline
提唱年	1822	1978
提唱者	Joseph Fourier and Ernst Abbe	Michael Feit and John Fleck
種類	Spectral decomposition method	Paraxial propagation algorithm
原典	Goodman, J. W. (1968). Introduction to Fourier Optics. McGraw-Hill.	Feit, M. D., & Fleck, J. A. (1978). Light propagation in graded-index optical fibers. Applied Optics, 17(24), 3990-3998.
別名	frequency-domain optics, wave optics, diffraction theory	BPM, paraxial approximation method
関連	3	3
概要	Fourier optics is a mathematical framework that analyzes optical systems and phenomena using Fourier transforms and frequency-domain methods. Grounded in Joseph Fourier's 1822 work on heat diffusion and Ernst Abbe's microscopy theory, this approach decomposes optical fields into plane waves or spatial frequencies, revealing how optical systems manipulate and filter these components to produce images and transmit information.	The Beam Propagation Method is a computational technique for simulating the propagation of optical beams through slowly varying, weakly guiding structures. Developed by Feit and Fleck in 1978, BPM exploits the paraxial approximation to reduce the full vector wave equation to a scalar or vector envelope equation, enabling efficient simulation of waveguides, integrated optics, and photonic devices.