Time-of-flight device and method for identifying image using time-of-flight device

A method for identifying an image using a time-of-flight (TOF) device, comprising:

• providing a time-of-flight device, the time-of-flight device comprising:
• an infrared light emitter and an infrared light receiver, the infrared light emitter emits an infrared light along a first direction;
• a right angle prism disposed on a movable base, the infrared light passes through the right angle prism;
• and
• a first actuator and a second actuator, respectively disposed beside the movable base, wherein by actuating the first actuator, the right angle prism is tilted toward a second direction, and by actuating the second actuator, the right angle prism is tilted toward a third direction, and the second direction and the third direction are both perpendicular to the first direction.
• when a target object is close to the time-of-flight device, the time-of-flight device is activated to identify a first range of the target object, and obtain a first three dimension (3D) identification result image;
• adjusting an angle of the right angle prism by actuating the first actuator and the second actuator, and changing an irradiation angle of the infrared light;
• and
• after the irradiation angle of the infrared light is changed, the second range of the target object is recognized, and to obtain a second 3D identification result image.