Optical filter including plates for filtering light and optical measuring device employing optical filter

An optical measuring device comprises:

• an optical filter comprising a plurality of first pixels arranged next to one another, each of the plurality of first pixels comprising:
• a first reflective plate configured to receive light and having first holes formed therein, and
• a second reflective plate that faces the first reflective plate, is separated from the first reflective plate by a gap, and has second holes formed therein, the second reflective plate being configured to transmit the light of a wavelength or the light of a range of wavelengths that has been transmitted through the first reflective plate and is incident on the second reflective plate, the second holes corresponding to the first holes in shape and orientation;
• and
• a sensor that is configured to measure an intensity of light transmitted through the optical filter and includes a plurality of second pixels, each of the plurality of second pixels corresponding to each of the plurality of first pixels in a one to one relationship and being configured to measure the intensity of light transmitted through a corresponding first pixel,
• wherein the light of the wavelength or the light of the range of wavelengths is transmitted according to a spacing between adjacent holes of the first holes or a spacing between adjacent holes of the second holes,
• wherein at least one first pixel, among the plurality of first pixels, has the spacing between adjacent holes of the first holes different from that of at least one another first pixel, among the plurality of first pixels, or has the spacing between adjacent holes of the second holes different from that of the at least one another first pixel,
• wherein the first reflective plate is included in a plurality of first reflective plates of the plurality of first pixels, the plurality of first reflective plates being arranged along a first plane, and
• wherein the second reflective plate is included in a plurality of second reflective plates of the plurality of first pixels, the plurality of second reflective plates being arranged along a second plane parallel to the first plane.