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We propose and fabricate a linear variable color filter (LVCF) that possesses an enhanced angular tolerance in conjunction with a wide linear filtering range (LFR) by taking advantage of an Ag-TiO 2 -Ag configuration. The TiO 2 cavity is tapered in thickness along the device so that the resonance wavelength can be continuously tuned according to the position. In addition, the metal-dielectric-metal structure is overlaid with a pre-designed graded antireflection coating in SiO 2 to complete thedoi:10.1364/oe.25.002153 pmid:29519062 fatcat:awygtd3llnefthrnly2sxnhp2u