| 摘要 |
The invention relates to wavelength selective optical components for transmitting the light in a narrow spectral band, which is centered around a wavelength, and for reflecting the wavelengths lying outside this band. The component includes an input guide ( 2 ) conducting light radiation ( 3 ) to a tunable filter ( 1 ), an input guide ( 2 ) conducting the radiation ( 3 ) to the filter ( 1 ) in order to perform a first pass through it. The component includes means ( 6 ) for returning a first part ( 4 ) of the radiation ( 3 ) reflected by the filter ( 1 ) during the first pass in order to perform a second pass through it.
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