Abstract: A workpiece such as a minute stud (34) is aligned to a small porcelain body (36) to form a guide (40) for processing lightwaves. Such alignment includes registering a target (30) of an avalanche photodiode in a chip (32) on the stud (34) to a fiber receiving bore (44) in the body (36). Radiation, preferably in the form of a beam of light, is directed to a first end of the bore (44). Some portion of the light is redirected sufficiently to pass longitudinally along the surfaces of the bore (44) and thereby project an image from a second end of the body (36). The image is advantageously in the form of a halo which is enlarged and displayed on a video monitor (100). The stud (34) is manipulated about the first end of the bore (44) by operating micropositioning fixtures (66 and 68). The target (30) in chip (32) reflects light sufficiently to cast a preferably dark image of the target ( 30) through the bore (44) and its image onto the video monitor (100).

Abstract: A workpiece such as a miniature stud (10) supports a chip (20) having a heat and light sensitive device therein. Such stud (10) is thermally bonded to an insulative body (12) to form a guide (14) for converting light to electrical pulses. A positive and a negative electrode (44 and 45), respectively, are each connected to a respective pole of a power supply for providing electrical current adequate for the bonding. A resistance heating element (42) conducts the current from electrode (44) at least partially along a path through the stud (10) to electrode (45). For stud (10), the path is selected preferably by providing a thru hole (90) in element (42) under the position occupied by the heat sensitive device when stud (10) is placed upon the element (42). The current concentrates in stud (10) along an annular ring (29) where heating is required sufficiently to thermally bond at least the ring (29) of the stud (10) to the body (12).