A method is disclosed for aligning a laser projection device with a subject article. The method comprises the utilization of specially adapted mounts to secure reflective targets to specific geometric features of such a subject article. By mounting the laser target devices to the subject article itself, tooling jigs are not necessary and the targets can be easily positioned at various locations to avoid laser beam obstruction concerns and to ensure accurate alignment.

An infrared target for use with indoor industrial G.P.S. has at least one mask or overlay applied to the lens of the target. The mask increases the precision of setting the location of any instrument, assembly, machinery, or component to be machined, during industrial applications. The mask improves position tolerances to 0.0005 inch or less. Further, a reflective ring positioned upon the overlay serves as a marker for laser light at lesser tolerance than the overlay.

A layered target assembly is disclosed for improved shooting practice which provides for a first planar layer, a second planar layer, and a third planar layer. The first planar layer preferably consists of a paper material to provide a relatively rigid support for the second planar layer and the third planar layer. The second planar layer preferably consists of a reflective sheet of metallic foil. The third planar layer covers the second planar layer and is translucent such that light easily passes therethrough for reflection from the second planar layer. The third planar layer is highlighted by the reflected light so that a laser dot is visible on the layered target assembly of the present invention even during bright ambient light conditions. The first planar layer, second planar layer, and third planar layer each have respective planar surfaces that are approximately equal in size. Means may be provided for filtering light within the layered target assembly, such as use of a tinted metallic foil for the second planar layer or use of a fourth planar layer that forms a color filter, to thereby reflect light of a specific color. The color filter or tint of the metallic foil may be the same color as the laser beam to reinforce the color of the laser beam so as to make the laser dot so produced on the layered target assembly easier to see.

In accordance with the present invention, there is provided an edge adapter for use with a spherically mounted retroreflector device for measuring the location of a measurement point on a first object surface of an object. The object has a second object surface with an edge interposed between the first and second object surfaces. The measurement point is positioned an offset distance from the edge. The retroreflector device has a spherical outer surface. The edge adapter is provided with an adapter body having at least two engagement points. The engagement points and the measurement point are cooperatively sized and configured to define a sphere of substantially the same radius as the spherical outer surface. The edge adapter is further provided with an adapter base attached to the adapter body. The adapter base has a base surface formed to engage the first object surface for supporting the edge adapter thereat. The spherical outer surface of the retroreflector device is placed in contact with the engagement points of the adapter body and the measurement point of the first object surface for measuring the location of the measurement point.

A retro-reflective target tape comprising a lower sub-laminate having an upper transparent thick mylar backing about 2 mils thick, a release sheet therebeneath and a pressure sensitive adhesive therebetween; and an upper sub-laminate having an upper light reflective sheet with a thin, transparent mylar backing about a half mil thick therebeneath and with a pressure sensitive adhesive therebetween and with pressure sensitive adhesive beneath the thin mylar backing, the upper sub-laminate being cut to form a plurality of circular reflective targets and removed from the lower sub-laminate except for the plurality of circular reflective targets, the pressure sensitive adhesive above the release sheet remaining with the thick mylar backing upon the removal of the adjacent release sheet. Also disclosed is a method of fabricating such tape.