Method of detecting living tissue element, device of detecting living tissue element, and wearable apparatus

A device of detecting a living tissue element, comprising:

• a light source module configured to irradiate a detection region by incident light having at least one predetermined wavelength, wherein the incident light passes through the detection region to form at least one beam of exit light exited from at least one exit position, and the incident light is incident on at least two incident positions;
• an acquisition module comprising M photosensitive surfaces, wherein each of the M photosensitive surfaces is configured to acquire the light intensity value of the exit light exited from the exit position, the acquisition module is configured to obtain a light intensity value corresponding to each beam of the exit light acquired by the M photosensitive surfaces, so as to obtain T output light intensities, and each of the T output light intensities is obtained by processing the light intensity value of the exit light acquired by one or more of the M photosensitive surfaces, a ratio of an area of each photosensitive surface to a circumference of the photosensitive surface is greater than or equal to a ratio threshold, the ratio threshold is greater than or equal to 0.04 mm, when the ratio threshold is greater than or equal to 0.04 mm, the larger the area of the photosensitive surface, the better an effect of suppressing a jitter caused by a change in an intensity distribution of a light spot irradiated with the incident light on the detection region;
• and
• a processing module configured to determine a concentration of at least one detected tissue element according to at least one output light intensity corresponding to the at least one predetermined wavelength.