Narrowband filter is mainly applied to 3D recognition technology. Infrared transmitting module transmits special modulated infrared light to the photographed object. Infrared receiving module receives infrared light reflected back from the photographed object through the narrowband filter, and obtains the spatial information of the photographed object through computation to realize 3D recognition;

Mainly used in smart phones, virtual reality/augmented reality/mixed reality, 3D somatosensory games, 3D camera and display, etc.