Gaze detection device
[Problem] To reduce the size of a head-mounted display or other typical display device comprising a gaze detection device. [Solution] A gaze detection device comprising a semi-reflective mirror 13 that partly transmits and partly reflects incident light, and one or more gaze analysis cameras that capture images of the user's eye 10 reflected in the semi-reflective mirror 13 , wherein the semi-reflective mirror 13 is positioned to face the eyes 10 of the user and images of the user's eye 10 reflected in the semi-reflective mirror 13 are captured by one or more abovementioned cameras.
1. A gaze detection device comprising:
one or more displays having a display surface;
a semi-reflective mirror that partly reflects and partly transmits incident light, the semi-reflective mirror being arranged to be positioned between a user's eye and the one or more displays; and
one or more cameras that capture an image of the user's eye, the one or more cameras being positioned such that light from the user's eye is reflected on the semi-reflective mirror to enter the one or more cameras, for analyzing an eye gaze of the user,
wherein the semi-reflective mirror is arranged to face the user's eye,
wherein the one or more cameras are arranged to capture the image of the user's eye so that the user's eye is viewed from below the user's eye, through the semi reflective mirror,
wherein the one or more cameras are arranged to be positioned below the user's eye,
wherein the one or more cameras capture images of both eyes of the user and the gaze detection device determines spatial coordinates of the user's gaze point from a parallax of the user's eyes,
wherein an optical axis of the one or more cameras does not intersect with the intersection between an eye axis of the user and the semi-reflective mirror, and
wherein edges of the semi-reflective mirror do not appear in a field of view of the user's eye.
2. The gaze detection device according to claim 1 , wherein the display, the semi-reflective mirror, and the one or more cameras are enclosed in a single housing that can be secured to a head of the user as a head-mounted display.
3. The gaze detection device according to claim 1 , further comprising one or more lenses facing the semi-reflective mirror, wherein the semi-reflective mirror, the one or more cameras, and one or more of the lenses are enclosed in a single casing that can be secured to a head of the user, wherein the single casing can be detached from a display.
4. The gaze detection device according to claim 1 , wherein the semi-reflective mirror is a hot mirror that transmits visible light and reflects infrared light.
5. The gaze detection device according to claim 1 , further comprising one or more lenses to be provided between the semi-reflective mirror and the user's eye, wherein light from the user's eye enters the one or more cameras after passing through the lens and reflected at the semi-reflective mirror.