Dynamic of the spectral and angular selectivity of the tunable collinear acousto-optical filter

An acousto-optical filter (AOF) using in area of the high-speed dynamic spectroscopy and filtering of complicated optical fields has been considered. The transition process of forming of the diffractive wave E₁(r,t), and also enrichment of the spectral structure of the field E₁(r,t) influence on the spread function (SP) Ψ(t,Δλ). Distortion of the SP Ψ(t,Δλ) is determined by modulating function of the steering command u(t) of the AOF. The purpose of this work is an investigation of the distortion Ψ(t,Δλ) at any velocity of retuning of the AOF, power and form of the steering command u(t).