Light guide device and camera modue including the same

Abstract

According to an embodiment, disclosed is a camera module which includes a light source part which emits light, a light guide device which guides the light emitted from the light source part to an object and guides light reflected by the object, and a light receiving part which receives the light reflected by the object and guided by the light guide device, wherein the light guide device includes a substrate, an input diffraction element disposed on the substrate, an input and output diffraction element disposed on the substrate, and an output diffraction element disposed on the substrate, and the input diffraction element is formed to change an incident angle of an optical axis of the light emitted from the light source part based on a grating vector of the input diffraction element according to a wavelength of the light.

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