An optical filter comprising: at least one first filter element (110, 120, 130); and at least one second filter element (210, 220, 230) arranged on a same plane as the at least one first filter element (110, 120, 130), wherein each of the at least one first filter element (110, 120, 130) comprises: a first bandpass filter (110a, 120a, 130a) having a first center wavelength within a first wavelength band and including a plurality of first Bragg reflective layers and at least one first cavity (161, 162, 163) provided between the plurality of first Bragg reflective layers; and a first multi-layer provided on the first bandpass filter (110a, 120a, 130a), the first multi-layer having a different center wavelength than the first center wavelength of the first bandpass filter (110a, 120a, 130a) to block light of other wavelength bands than the first wavelength band; wherein each of the at least one second filter element (210, 220, 230) comprises: a second bandpass filter (210a, 220a, 230a) having a second center wavelength within a second wavelength band and including a plurality of second Bragg reflective layers and at least one second cavity (261, 262, 263) provided between the plurality of second Bragg reflective layers; and a second multi-layer having a different center wavelength than the second center wavelength of the second bandpass filter (210a, 220a, 230a) to block light of other wavelength bands than the second wavelength band, wherein the second bandpass filter (210a, 220a, 230a) is provided on the second multi-layer. at least one first filter element (110, 120, 130); and at least one second filter element (210, 220, 230) arranged on a same plane as the at least one first filter element (110, 120, 130), wherein each of the at least one first filter element (110, 120, 130) comprises: a first bandpass filter (110a, 120a, 130a) having a first center wavelength within a first wavelength band and including a plurality of first Bragg reflective layers and at least one first cavity (161, 162, 163) provided between the plurality of first Bragg reflective layers; and a first multi-layer provided on the first bandpass filter (110a, 120a, 130a), the first multi-layer having a different center wavelength than the first center wavelength of the first bandpass filter (110a, 120a, 130a) to block light of other wavelength bands than the first wavelength band; wherein each of the at least one second filter element (210, 220, 230) comprises: a second bandpass filter (210a, 220a, 230a) having a second center wavelength within a second wavelength band and including a plurality of second Bragg reflective layers and at least one second cavity (261, 262, 263) provided between the plurality of second Bragg reflective layers; and a second multi-layer having a different center wavelength than the second center wavelength of the second bandpass filter (210a, 220a, 230a) to block light of other wavelength bands than the second wavelength band, wherein the second bandpass filter (210a, 220a, 230a) is provided on the second multi-layer. a first bandpass filter (110a, 120a, 130a) having a first center wavelength within a first wavelength band and including a plurality of first Bragg reflective layers and at least one first cavity (161, 162, 163) provided between the plurality of first Bragg reflective layers; and a first multi-layer provided on the first bandpass filter (110a, 120a, 130a), the first multi-layer having a different center wavelength than the first center wavelength of the first bandpass filter (110a, 120a, 130a) to block light of other wavelength bands than the first wavelength band; wherein each of the at least one second filter element (210, 220, 230) comprises: a second bandpass filter (210a, 220a, 230a) having a second center wavelength within a second wavelength band and including a plurality of second Bragg reflective layers and at least one second cavity (261, 262, 263) provided between the plurality of second Bragg reflective layers; and a second multi-layer having a different center wavelength than the second center wavelength of the second bandpass filter (210a, 220a, 230a) to block light of other wavelength bands than the second wavelength band, wherein the second bandpass filter (210a, 220a, 230a) is provided on the second multi-layer. a second bandpass filter (210a, 220a, 230a) having a second center wavelength within a second wavelength band and including a plurality of second Bragg reflective layers and at least one second cavity (261, 262, 263) provided between the plurality of second Bragg reflective layers; and a second multi-layer having a different center wavelength than the second center wavelength of the second bandpass filter (210a, 220a, 230a) to block light of other wavelength bands than the second wavelength band, wherein the second bandpass filter (210a, 220a, 230a) is provided on the second multi-layer.