PROJECTOR AND METHOD FOR ACQUIRING COORDINATE OF BRIGHT SPOT

摘要

A projector for acquiring the coordinates of the bright spots includes a semi-transmitting mirror (22), an imaging device (24), and a processing system (25). The semi-transmitting mirror (22) is provided on the light path between a light source (21) and a zooming system (23). The imaging device (24) picks up external light ray reflected by the semi-transmitting mirror(22). The processing system (25) acquires the coordinates of the bright spots according to the image of the bright spots picked up by the imaging device.