Patent ID: 6594410
Filing Date: 2003-07-15
Classification: G02B,H04J

Abstract:
A tunable optical filter device comprising:a first optical filter including a plurality of first reflective elements, each of the first reflective elements having a respective first reflective filter function centered at respective reflection wavelengths for reflecting a respective first wavelength band of light, each of the first reflective filter functions being spaced and substantially non-overlapping; and a second optical filter, optically connected to the first optical filter to receive the first wavelength bands of light, including a plurality of second reflective elements, each of the second reflective elements having a respective second reflective filter function centered at respective reflection wavelengths for reflecting a respective second wavelength band of light, each of the second reflective filter functions being spaced and substantially non-overlapping; one of the first and second optical filters being tunable to overlap at least one of the first reflective filter functions and one of the second reflective filter functions.