Optical biomedical measurement device

An optical biomedical measurement device, comprising:

• a substrate;
• a light source disposed on the substrate;
• a photodiode sensor disposed on the substrate, laterally spaced from the light source;
• a plurality of light-blocking walls disposed vertically on the substrate, laterally located on both sides of the light source and on both sides of the photodiode sensor;
• a sealing layer covering the light source, the photodiode sensor, and the light-blocking walls;
• a cover plate bonded to the sealing layer;
• a plurality of light-absorption films vertically aligned with the light-blocking walls, disposed in a plurality of etching regions on a top surface of the cover plate;
• an optical filter film disposed on the cover plate and the light-absorption films;
• a plurality of nano-metal particles periodically arranged on the optical filter film with a distance therebetween;
• and
• an antibacterial optical film covering the nano-metal particles and the optical filter film, whereby the antibacterial optical film has a periodic nano-structure for increasing a surface area of the antibacterial optical film.