a light field modulator constructed to have one or more light modulation portions, each of said one or more light modulation portions comprising one or more beam homogenizers each having a microstructure and being configured for refracting light in different directions when passing therethrough;

a curved light transmitting substrate having at least one curving surface, wherein each of said one or more beam homogenizers is provided on said at least one curving surface of said curved light transmitting substrate to configure said microstructure of each of said one or more beam homogenizers on said at least one curving surface of said curved light transmitting substrate; and

a detection module operatively connected to said light field modulator, having a detection area which is divided into a plurality of designated areas and configured for a depth image information therewith, wherein said plurality of designated areas is detected at a predetermined time sequence, wherein said detection module comprises:

a detection light source being configured to emit a plurality of detection lights at said predetermined time sequence and to propagate to said plurality of designated areas of said detection area after being modulated by said light field modulator, wherein said detection light source comprises a plurality of illumination light sources which are independently operated, configured corresponding to said one or more light modulation portions and said plurality of designated areas of said detection area respectively, and switched on at said predetermined time sequence, such that said plurality of illumination light sources sequentially generate said plurality of detection lights to said plurality of designated areas in order to detect the depth image information at each of said plurality of designated areas of the detection area; and

a light receiving device, incorporating with said light field modulator, being configured to receive a reflected light, which are reflected by an object located at one of said plurality of designated areas of said detection area, and combine said plurality of detection lights and a related information thereof representing the depth image information of said one of said plurality of designated areas.