Noninvasive glucometer and blood glucose detection method

A noninvasive glucometer, comprising a light source and a spectrometer;

• wherein, a spectrum emitted by the light source generates incident light entering the spectrometer after passing through an object to be detected;
• the spectrometer comprises:
• an optical modulation layer, the optical modulation layer comprising a base plate and one or more modulation units, the one or more modulation units being located on the base plate, each of the one or more modulation units being provided with several modulation holes, each of the modulation holes being configured to perform light modulation on the incident light to obtain a modulated spectrum, and the modulated spectrum being a broadband spectrum;
• a photoelectric detection layer located below the optical modulation layer, and configured to receive the modulated spectrum and provide a differential response with respect to the modulated spectrum;
• and
• a signal processing circuit layer located below the photoelectric detection layer and configured to reconstruct an original spectrum utilizing the differential response,
• wherein the optical modulation layer is made of silicon, germanium, silicon germanium materials, silicon compounds, germanium compounds, or III-V group materials.