Secondary alignment target for an electro-optical alignment measuring system

摘要: The secondary optical alignment target (100) of the present invention includes a housing (102) through which an beam (122) is directed. A splitter (104) mounted in passes one portion (128) out to maintain reference line sight initially established by axis (122). other (126) reflected toward window (110) further splits into (130) and refracted sub-portions. sub-portion furnishes information regarding translational orientation (100), while rereflected furnish return (134) containing rotational (100). photodetector (112) detects subportion (28') at source (2' ) (134). method for using plurality targets simultaneously align stations described.