An optical filter comprising: a plurality of bandpass filters having center wavelengths of light that are different from one another, wherein each of the plurality of bandpass filters comprises: a cavity layer ; a first Bragg reflective layer provided on an upper surface of the cavity layer; the upper surface being the surface from which light is incident to the cavity layer and a second Bragg reflective layer provided on a lower surface of the cavity layer opposite to the upper surface, and wherein the cavity layer has a thickness greater than λ/n, where λ is a center wavelength of light of each of the plurality of bandpass filters and n is an effective refractive index of the cavity layer; wherein each of the first Bragg reflective layer and the second Bragg reflective layer comprises three or more material layers having different refractive indices from one another; wherein the optical filter further comprising a plurality of additional filters provided on the plurality of bandpass filters, the plurality of additional filters being configured to transmit light of certain wavelength bands, respectively; wherein two or more adjacent bandpass filters among the plurality of bandpass filters are included in a filter array, and wherein each of the plurality of additional filters is provided on an upper portion of a respective filter array. a plurality of bandpass filters having center wavelengths of light that are different from one another, wherein each of the plurality of bandpass filters comprises: a cavity layer ; a first Bragg reflective layer provided on an upper surface of the cavity layer; the upper surface being the surface from which light is incident to the cavity layer and a second Bragg reflective layer provided on a lower surface of the cavity layer opposite to the upper surface, and wherein the cavity layer has a thickness greater than λ/n, where λ is a center wavelength of light of each of the plurality of bandpass filters and n is an effective refractive index of the cavity layer; wherein each of the first Bragg reflective layer and the second Bragg reflective layer comprises three or more material layers having different refractive indices from one another; wherein the optical filter further comprising a plurality of additional filters provided on the plurality of bandpass filters, the plurality of additional filters being configured to transmit light of certain wavelength bands, respectively; wherein two or more adjacent bandpass filters among the plurality of bandpass filters are included in a filter array, and wherein each of the plurality of additional filters is provided on an upper portion of a respective filter array. a cavity layer ; a first Bragg reflective layer provided on an upper surface of the cavity layer; the upper surface being the surface from which light is incident to the cavity layer and a second Bragg reflective layer provided on a lower surface of the cavity layer opposite to the upper surface, and wherein the cavity layer has a thickness greater than λ/n, where λ is a center wavelength of light of each of the plurality of bandpass filters and n is an effective refractive index of the cavity layer; wherein each of the first Bragg reflective layer and the second Bragg reflective layer comprises three or more material layers having different refractive indices from one another; wherein the optical filter further comprising a plurality of additional filters provided on the plurality of bandpass filters, the plurality of additional filters being configured to transmit light of certain wavelength bands, respectively; wherein two or more adjacent bandpass filters among the plurality of bandpass filters are included in a filter array, and wherein each of the plurality of additional filters is provided on an upper portion of a respective filter array. <EOS>