A method for controlling a tunable filter and an a

专利名称：A method for controlling a tunable filter

and an apparatus therefor

发明人：Nakata, Tohru,Nakamura, Kenji申请号：EP91118555.1申请日：19911030公开号：EP0483821A2公开日：19920506

专利附图：

摘要：An apparatus for controlling a tunable filter of the present invention includes atunable filter, a generating device for generating a reference light whose wavelength iswithin a transmission wavelength band of the tunable filter, a detecting device for

detecting an interaction signal, such as a beat signal, caused by interaction between adesired component of an input light to be input into the tunable filter and the referencelight and a controlling device for controlling the tunable filter based on the interactionsignal. The controlling device controls a current flow through a wavelength controlterminal of the tunable filter such that a center filtering wavelength of the transmissionwavelength band of the tunable filter substantially coincides with a wavelength of thedesired component.

申请人：CANON KABUSHIKI KAISHA

地址：30-2, 3-chome, Shimomaruko, Ohta-ku Tokyo JP

国籍：JP

代理机构：Pellmann, Hans-Bernd, Dipl.-Ing.

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