Abstract
To select one or more spectral bands for excitation, the traditional solution was to stock an assortment of various pass and band filters. On demand, the appropriate filters were inserted into the beam path. To adjust the excitation intensity, a series of grey attenuation filters with different transmission was necessary if the light source lacked an efficient regulation. The resulting complex servomechanical assembly is not very flexible and not very efficient, but elaborate and failure-prone.
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Further Reading
Borlinghaus RT (2012) The white confocal. Eur Phys J Plus 127(10):131–139. (From AOTF to white light laser)
Harris SE, Wallace RW (1996) Acousto-optic tunable filter. J Opt Soc Am 59(6):744–747. (Original publication on acousto optical tunable filters)
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Borlinghaus, R.T. (2017). Acousto-Optical Excitation Filter. In: The White Confocal. Springer, Cham. https://doi.org/10.1007/978-3-319-55562-1_5
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DOI: https://doi.org/10.1007/978-3-319-55562-1_5
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