Time-Space Multiplexed LADAR
AssigneeRafael-Armament Development Authority Ltd.
InventorYochay Danziger
Life of this patent
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Abstract
A LADAR system includes a detector optical arrangement defining a current optical field of view. An illumination subsystem without moving parts transmits pulsed illumination at different times to each of a number of illumination sub-regions of the current optical field of view, and a detection subsystem, including one or more detectors, detects reflected illumination from a corresponding one or more detection sub-region of the current optical field of view. Each of the detection sub-regions overlaps illumination sub-regions so that an overlap of each of the illumination sub-regions with the detection sub-region defines a LADAR image pixel of resolution finer than the detection sub-region.
Claims20
A LADAR system comprising:
- (a) a detector optical arrangement defining, a current optical field of view,
- (b) an illumination subsystem configured for transmitting pulsed illumination at different times to each of a plurality of illumination sub-regions of said current optical field of view without moving parts;
- and
- (c) a detection subsystem including one or more detectors deployed for detecting reflected illumination from a corresponding one or more detection sub-region of said current optical field of view,
- wherein each of said one or more detection sub-regions overlaps a plurality of said illumination sub-regions, an overlap of each of said illumination sub-regions with said detection sub-region defining a LADAR image pixel of resolution finer than said detection sub-region.
A fiber coupler comprising:
- (a) a primary optic fiber having a core and a clad, said clad having a first refractive index;
- and
- (b) a branch fiber forming an acute-angled junction with said primary optic fiber, at least part of said branch fiber having a higher refractive index than said first refractive index, said at least part of said branch fiber optically coupled with said clad of said primary optic fiber but spaced from said core of said primary optic fiber.
Dependencies are inferred from the claim text.