Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1977-04-13
1978-10-31
Henry, Jon W.
Optics: measuring and testing
Range or remote distance finding
With photodetection
356138, G02B 510, G01B 1100
Patent
active
041231481
ABSTRACT:
Apparatus for reflectively generating a straight line light path from a laser beam comprises a planar reflective surface which is arranged to reflect the laser output beam approximately 90.degree., and an arcuate reflective surface, such as a hollow cylinder, which is located relative to the planar reflective surface such that the reflected beam is impinged thereon normal to its axis of curvature. The cylinder is arranged with its axis of curvature parallel to and offset from the laser output beam so that every increment of the columnar reflected beam strikes it at a point having a tangent which is at a different angle with respect to the reflected beam than every other increment of the beam. Accordingly, each increment of the beam is reflected from the arcuate reflective surface at a different angle, thereby creating a fan shaped pattern of light. The planar mirror is angularly adjustable, for directing the reflected beam onto the arcuate reflective surface along a single circumferential line for making the resulting fan shaped beam straight and perpendicular to the axis of curvature of the cylinder. Also, both the amount of offset and the angle of the axis of curvature of the cylinder are adjustable for adjusting respectively the included angle of the fan and its straightness and perpendicularity.
REFERENCES:
patent: 3554647 (1971-01-01), Goodwin et al.
patent: 3820903 (1974-06-01), Kindl et al.
Henry Jon W.
Industrial Electrical Control Corporation
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