Accession Number : ADD017353

Title :   Passive, Multi-Channel Fiber Optic Rotary Joint Assembly.

Descriptive Note : Patent Filed 8 Nov 93, patented 6 Dec 94,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Ames, Gregory H ; Morency, Roger L

Report Date : 06 Dec 1994

Pagination or Media Count : 14

Abstract : A passive multi-channel optical fiber rotary joint couples optical fiber communication channels via axially bilaterally symmetrically disposed lens housings, or array pieces, for receiving miniature-collimation-lenses to one and the other sides of an image-derotation-prism and prism-rotational-drive-subassembly including an image derotation prism which rotates at a predetermined ratio of the relative rotation of the array pieces. This establishes transverse pseudo-planar rotary interfaces respectively between the one and another array piece and the confronting sides of the prism-and-prism- drive-subassembly. Each channel, at the axially outward side of each of one and the other array pieces, includes a fiber and lens junction in which the fiber is attached to the axially outward side of the collimation lens at a predetermined axially bilaterally symmetrical position chosen for maximum coupling of signal power through the joint, and individual lateral positions relative to the lens chosen to provide coupling with a path of beam propagation perpendicular to the rotary interface at the other side of the collimation lens. Each array piece forms a precision tolerance locality of axial engagement with the confronting side of the prism-and -prism -drive-subassembly, which in turn defines the respective rotary interfaces. (AN)

Descriptors :   *FIBER OPTICS, *PATENTS, *MULTICHANNEL COMMUNICATIONS, COUPLING(INTERACTION), PASSIVE SYSTEMS, OPTICAL COMMUNICATIONS, ALIGNMENT, WAVE PROPAGATION, SYMMETRY, PRECISION, LIGHT TRANSMISSION, TOLERANCE, LINEAR ARRAYS, FOCAL PLANES, JUNCTIONS, ROTATION, BEAMS(RADIATION), OPTICAL LENSES, IMAGE MOTION COMPENSATION, IMAGE RESTORATION, MULTICHANNEL, PRISMS(OPTICS), COLLIMATORS

Subject Categories : Fiber Optics and Integrated Optics
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE