Biometric sensor and electronic device comprising the same

An electronic device comprising:

• a light emitting unit configured to emit a first light ray;
• a light receiving unit configured to receive a second light ray, wherein the second light ray includes a portion of the first light ray reflected by a body of a user;
• a processor configured to determine biometric information of the user based on the second light ray;
• and
• a housing including an optical layer, wherein the optical layer has a first surface facing the light emitting unit and the light receiving unit, a second surface opposite the first surface, and the optical layer includes:
• an asymmetrical protrusion structure formed on the first surface or the second surface and including a plurality of asymmetrical protrusion units, and
• a symmetrical protrusion structure formed on the first surface or the second surface opposite the asymmetrical protrusion structure and including a first plurality of symmetrical protrusion units.

An electronic device comprising:

• a light emitting unit configured to emit a first light ray;
• a light receiving unit configured to receive a second light ray, wherein the second light ray includes a portion of the first light ray reflected by a body of a user;
• a housing including an optical layer, wherein the optical layer includes at least one protrusion structure formed on at least one surface of the optical layer;
• and
• a processor configured to determine biometric information of the user based on the second light ray.