<http://webisa.webdatacommons.org/216356605>	<http://www.w3.org/ns/prov#value>	"The invention is characterized in that the components consist of one or more circuits with electro-optical feedback, in which at least one optical modulator, forexample a liquid crystal modulator, is located in the ray path between at least one light source, for example a light-emitting diode (LED) or a laser diode, and at least one photo-detector, for example a photo-resistor or a photo-diode." .
<http://webisa.webdatacommons.org/216356605>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<patentgenius.com> .
<http://webisa.webdatacommons.org/prov/211724366>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/216356605> .
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<http://webisa.webdatacommons.org/prov/156183208>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/216356605> .