Method for adjusting the intensity of a light beam in an optical arrangement and associated optical arrangement

An optical arrangement, comprising an acousto-optical tunable filter (AOTF) disposed so as to have a light beam passed therethrough, the optical arrangement being configured to adjust an intensity of the light beam as a function of at least one of frequency or amplitude of a sound wave with which the AOTF is operated, wherein the amplitude of the sound wave at a specified sound wave frequency is selected such that the amplitude is greater than would be required to achieve a first peak intensity for a specified wavelength or for a specified wavelength spectrum of the light beam, wherein the amplitude of the sound wave is also selected such that a value of an integral of a product of a transmission function of the AOTF and the wavelength spectrum of the light beam is greater than a value of an integral of a product of the transmission function of the AOTF and the wavelength spectrum of the light beam at the amplitude to be selected to achieve the first peak intensity, and wherein a light source or light sources generating the light beam is or are selected or adjusted such that the wavelength spectrum of the generated light beam is continuous and wider than or as wide as the width of the transmission function of the AOTF.