Optical navigator and method for controlling optical mechanisms in optical navigator

The invention discloses an optical navigator. The optical navigator comprises a first optical mechanism, a second optical mechanism, an image sensor and a controller, wherein the first optical mechanism is used for projecting light to a surface to generate a first projection result; the second optical mechanism is used for projecting the light to the surface to generate a second projection result; the image sensor is used for detecting at least one of the first projection result and the second projection result to generate at least one first image sensing result in a detecting range; the controller is coupled with the first optical mechanism, the second optical mechanism and the image sensor and is used for controlling the first optical mechanism and the second optical mechanism according to the first image sensing result; the optical navigator performs mobile detection according to the first image sensing result.