A health monitoring apparatus including: an optical assembly is configured to: emit a light on a target surface; receive the light reflected from the target surface; collimate the reflected light; and filter the collimated light in a preset wavelength range; and an electronic interface operatively coupled to the optical assembly configured to: trigger the optical assembly; obtain an electrical signal from the optical assembly corresponding to the filtered light; generate data by converting the obtained electrical signals; and transmit the data to an electronic device.