Eye tracking optical device, system and virtual reality apparatus

An eyeball tracking optical device, comprising a light source assembly, a lens assembly, a reflection assembly and an image collection assembly, wherein

• the lens assembly comprises a first lens portion and a second lens portion which are sequentially disposed away from an eyeball, a side face, away from the eyeball, of the first lens portion has a concave face, a side face, close to the eyeball, of the second lens portion has a convex face, the concave face and the convex face attach to form a bonding face, the bonding face is provided with a first reflection layer, and the first lens portion and the second lens portion form a bonding lens;
• the reflection assembly is located at a position, close to the image collection assembly, of the lens assembly;
• the light source assembly is disposed to emit a first light ray to the eyeball, the first reflection layer is disposed to reflect a reflection light ray of the first light ray to form a first reflection light ray, and the reflection assembly is disposed to reflect the first reflection light ray at least once to form a light ray to be imaged;
• the image collection assembly is disposed to collect the light ray to be imaged, so as to track the eyeball.