Back to results
US 9,804,335 B2Granted
Multichannel fiber optic rotary joint (FORJ) having an achromatic metasurface
AssigneeSchleifring und Apparatebau GmbH
InventorGregor Popp
Life of this patent
Estimating the term…
Abstract
A Multichannel Fiber Optic Rotary Joint (FORJ) has a Dove prism as a derotating optical element, wherein the Dove prism has a multiwavelength achromatic metasurface coating on the input and output face. Such a Multichannel FORJ has the advantage that its transmission properties include consistently low attenuation over a rotation angle and a high-return loss over a broad wavelength range, e.g. the whole frequency band used for telecommunications. A method for fabricating the same.
Claims19
An optical rotary joint comprising:
- a first light collimator connected to first light waveguides,
- a second light collimator connected to second light waveguides, the second collimator arrangement being arranged rotatably relative to the first collimator arrangement about a rotation axis, and
- a derotating optical element in a light path between the first light collimator and the second light collimator,
- wherein
- a first face of the derotating optical element comprises a first multiwavelength achromatic metasurface, and
- a second face of the derotating optical element comprises a second multiwavelength achromatic metasurface.
3 more elements
A method, comprising:
- forming, on a face of a derotating optical element, a multiwavelength achromatic metasurface;
- and
- assembling an optical rotary joint that contains said derotating optical element.
Dependencies are inferred from the claim text.