Electronic device for eye-tracking and method of operating the same

A method comprising:

• obtaining a first coded image by receiving first polarized light refracted into a first path by a metalens, wherein the metalens is configured to refract incident light into different paths according to a polarization direction of the incident light;
• identifying whether gaze information of a user may be obtained from the first coded image;
• based on identifying that the gaze information of the user may not be obtained from the first coded image:
• obtaining a second coded image by receiving second polarized light refracted into a second path by the metalens;
• and
• obtaining the gaze information of the user from the second coded image.

An electronic device comprising:

• a first light source configured to output a first light;
• a second light source configured to output a second light;
• a metalens configured to refract incident light into different paths according to a wavelength of the incident light;
• an image sensor configured to receive light refracted by the metalens;
• at least one processor;
• and
• at least one memory storing at least one instruction that, when executed by the at least one processor, cause the electronic device to:
• obtain, through the image sensor, a first coded image, wherein the first coded image is based on the first light refracted into a first path by the metalens, and
• based on identifying that gaze information of a user may not be obtained from the first coded image, obtain gaze information of the user from a second coded image obtained through the image sensor, wherein the second coded image is based on the second light refracted into a second path by the metalens.