Optics: measuring and testing – Angle measuring or angular axial alignment – Alignment of axes nominally coaxial
Patent
1974-05-31
1976-02-03
Bauer, Edward S.
Optics: measuring and testing
Angle measuring or angular axial alignment
Alignment of axes nominally coaxial
350102, 350300, G01B 1126
Patent
active
039361942
ABSTRACT:
Very large retroreflectors, especially retroreflectors designed for laterally transferring and reversely directing the incoming beam along a parallel but offset outgoing path, are checked for accurate perpendicularity of their reflecting faces. First and second flat, laterally displaced and opposite-facing test reflectors are disposed between an error detector and the retroreflector. To special advantage, the test reflectors are coplanar parts of two pates that are united face-to-face. One test reflector is used to determine its own perpendicularity to the error detector and thereby to determine the perpendicularity of the plane of the second test reflector to the axis of an autocollimator or other error detector. The autocollimator directs its beam toward one end of the retroreflector for lateral transfer and redirection along a reverse path offset from the incoming beam. The second test reflector returns the outgoing beam along what should be an identical but reverse path, to the autocollimator.
REFERENCES:
patent: 3158674 (1964-11-01), Woodson
patent: 3734627 (1973-05-01), Edwards
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