Augmented reality device including variable focus lenses and operating method thereof

An operating method of augmented reality device, the operating method comprising:

• emitting, by an infrared (IR) scanner comprised in an eye tracking sensor, an IR light to an eye of an user;
• detecting, by an IR detector comprised in the eye tracking sensor, the IR light reflected by the eye of the user;
• detecting a plurality of glint feature points from the reflected IR light;
• obtaining distances between the plurality of detected glint feature points;
• obtaining information with respect to eye relief, which is a distance between the eye of the user and a variable focus lens of the augmented reality device, based on the obtained distances between the plurality of glint feature points;
• obtaining information with respect to a gaze point at which gaze directions of a left eye of the user and gaze direction of a right eye of the user converge, and an interpupillary distance which is a distance between a pupil of the left eye and a pupil of the right eye, based on the plurality of glint feature points;
• and
• determining a position of a focal region of the variable focus lens based on the information about the eye relief, the gaze point, and the interpupillary distance.

A computer program product comprising a computer-readable storage medium, the computer-readable storage medium comprising instructions readable by an augmented reality device to perform:

• emitting, by an infrared (IR) scanner comprised in an eye tracking sensor, an IR light to an eye of an user;
• detecting, by an IR detector comprised in the eye tracking sensor, the IR light reflected by the eye of the user;
• detecting a plurality of glint feature points from the reflected IR light;
• obtaining distances between the plurality of detected glint feature points;
• obtaining information with respect to eye relief, which is a distance between the eye of the user and a variable focus lens of the augmented reality device, based on the obtained distances between the plurality of glint feature points;
• obtaining information with respect to a gaze point at which gaze directions of a left eye of the user and gaze direction of a right eye of the user converge, and an interpupillary distance which is a distance between a pupil of the left eye and a pupil of the right eye, based on the plurality of glint feature points;
• and
• determining a position of a focal region of the variable focus lens based on the information about the eye relief, the gaze point, and the interpupillary distance.