Beam shifting device

Details Beam shifting device Beam shifting device

1993-04-30

1994-03-29

Ben, Loha

Optical: systems and elements

Deflection using a moving element

359202, 359211, G02B 2608

Patent

active

052990494

ABSTRACT:
A beam shifting device for directing a beam toward a fixed point of an object has instance vertical and horizontal beam shift elements, such as transparent optical plates with parallel surfaces positioned in an intended optical path. The vertical beam shift parallel plate is able to turn about a horizontal axis perpendicular to the optical axis for vertically shifting the beam upward and downward. The horizontal beam shift parallel plate, positioned in parallel with the vertical beam shift parallel plate, is able to turn about a vertical axis perpendicular to the optical axis for horizontally shifting the beam left and right. A controller detects vertical and horizontal deviations of the beam based on a distribution pattern of relative luminous energy of the beam diverged onto a spatial plane perpendicular to the intended path and drives the vertical and horizontal beam shift parallel plates to cancel the vertical and horizontal deviations of the beam, respectively.

REFERENCES:
patent: 3762793 (1973-10-01), Ullstig
patent: 3909104 (1975-09-01), Menke
patent: 4850686 (1989-07-01), Morimoto et al.

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