Method and device for variably attenuating the intensity of a light beam
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United States of America Patent
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Issued Date -
Dec 4, 2003
app pub date -
May 13, 2003
filing date -
May 17, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention relates to a method for variably attenuating the intensity of the light beam, in the case of which method the light beam is directed onto at least one optical arrangement, that has at least one body transparent to the light beam, in such a way that the light beam enters the at least one body through a light incidence surface and emerges again from the at least one body through a light emergent surface, the at least one body being moved in position relative to the incident light beam, in order to change the intensity of the emergent light beam with reference to the intensity of the incident light beam. It is proposed that the light beam be allowed to be incident, in the at least one body between the light incidence surface and the light emergent surface, on at least one interface to an optically thinner medium, the at least one body being moved in position relative to the incident light beam such that the incidence angle of the light beam on the interface is set to an angle that is smaller or greater than or equal to the critical angle of total reflection at this interface. Furthermore, a device is described for carrying out the method, in particular.
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