Aligning a workpiece to a body

Details Aligning a workpiece to a body Aligning a workpiece to a body

1982-11-01

1985-01-22

Shaw, Clifford C.

Electric heating

Metal heating

For bonding with pressure

219 85M, 356153, 358101, B23K 112

Patent

active

044953968

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). Such manipulation continues until a desired alignment is achieved and the stud (34) is bonded to the body (36) to form the guide (40).

REFERENCES:
patent: 3615138 (1971-10-01), Pedrotti et al.
patent: 3684384 (1972-08-01), Hojo et al.
patent: 4220966 (1980-09-01), Montone
patent: 4233520 (1980-11-01), Canfield
patent: 4289374 (1981-09-01), Franken et al.
patent: 4296998 (1981-10-01), Dufft

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