Patent
1980-12-24
1982-10-26
Henry, Jon W.
350287, G02B 718
Patent
active
043558704
ABSTRACT:
The object of the invention is to provide an optical system for rotating the plane defined by a pair of parallel light beams.
In one embodiment (see FIG. 4) a single pair of rhomboid prisms 36 and 37 have their respective input faces 15 disposed to receive the respective input beams 21 and 22. Each prism is rotated about an axis of revolution coaxial with each of the respective input beams 21 and 22 by means of a suitable motor 29 and gear arrangement 41 to cause the plane of the parallel output beams 21' and 22' to be rotated relative to the plane of the input beams.
In a second embodiment, two pairs (FIG. 2) of rhomboid prisms 23, 24 and 31, 32 are provided. In a first angular orientation of the output beams, prisms 23 and 24 serve to merely decrease the lateral displacement of the output beams for keeping the beams in the same plane as the input beams. In a second angular orientation of the prisms (FIG. 3) the input faces of the second pair of prisms 31 and 32 are brought into coincidence with the input beams for rotating the plane of the output beams 21' and 22' by a substantial angle such as 90.degree..
REFERENCES:
patent: 3909106 (1975-09-01), Buhler
Lovelace Alan M. Administrator of the National Aeronautics and Space
Orloff Kenneth L.
Yanagita Haruo
Brekke Darrell G.
Henry Jon W.
Manning John R.
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