Method for adjusting the intensity of a light beam in an optical arrangement and associated optical arrangement
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United States of America Patent
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Jul 7, 2020
Grant Date -
Dec 7, 2017
app pub date -
Jun 2, 2017
filing date -
Jun 3, 2016
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Abstract
A method for adjusting an intensity of a light beam in an optical arrangement includes passing the light beam through an acousto-optical tunable filter (AOTF). The intensity of the light beam is adjusted as a function of frequency and/or amplitude of a sound wave with which the AOTF is operated. The amplitude of the sound wave at a specified sound wave frequency is selected such that the amplitude is larger than would be required to achieve a first maximum diffraction efficiency for a specified wavelength or for a specified wavelength spectrum of the light beam. The amplitude of the sound wave is also selected such that a value of an integral of a product of the transmission function of the AOTF and the wavelength spectrum of the light beam is larger than at a value of the amplitude to be selected to achieve the first maximum.
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