Patent ID: 6580560
Filing Date: 2003-06-17
Classification: G02B,H04N

Abstract:
A laser light display projector for projecting a beam of laser light so as to produce a light pattern forming a visually perceptible light image, said projector comprising:a laser light source generating a substantially parallel light beam; a substantially planar diffuser positioned so that said light beam is incident thereon at a non-perpendicular angle and passes therethrough prior to forming the visually perceptible light image, said diffuser having a diffusion pattern effective for diffusing said light beam by a predetermined amount; a rotary actuator bearing said diffuser to thereby impart a rotating motion to said diffuser so that said diffusion pattern rotatably intersects said light beam; and a controller operatively connected to at least said rotary actuator to control rotational positioning of said diffuser in said light beam, and comprising closed-loop position control of said rotary actuator so as to precisely control rotational positioning of said diffuser.