Abstract: A laser projection system for projecting an image onto a surface comprises a laser projector operably connectable to a computer. The computer controls the operation of the system. The laser projector comprises a laser beam source for generating a laser light beam, a collimator comprising a focusing leans for focusing the laser light beam to a focal point, a collimating lens for collimating the laser light beam beyond the focal point and a wedge-shaped lens having an apertured interposed between the focusing lens and collimating lens. The aperture has a size for passing the laser light beam therethrough. Two scanners direct the light beam about a light path. A photo sensor receives light refracted by the wedge-shaped lens and generates a feedback signal. A plurality of target reflectors, each having a retroreflective material for retroreflecting light back to its source.

Abstract: A method and apparatus (2) for inspecting the surface quality of automotive parts (38) having smooth surfaces (44) utilizes a light source (4) and diffusing surface (6) contained in an opaque enclosure (8). The diffusing surface has a convex shape and is arranged relative to the light source to direct a gradient of light through the aperture (10) in the form of a beam. An object to be inspected is placed in the beam at a low angle relative to the inspection apparatus. All extraneous light is controlled and the beam is reflected off the object to an observer. The gradient in the reflective beam exposes any defects on the surface that are located on the beam and the location of the defects is noted. The inspection system and method can be used to inspect objects having surfaces that range from being highly reflective to lowly reflective. The curvature and location of the diffusing surface within the enclousre is adjustable. The size and location of the aperture is also adjustable.