The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 06, 1994
Filed:
Nov. 08, 1993
Gregory H Ames, Gales Ferry, CT (US);
Roger L Morency, Voluntown, CT (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
A passive multi-channel optical fiber rotary joint couples optical fiber munication 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 (i) a predetermined axially bilaterally symmetrical position chosen for maximum coupling of signal power through the joint, and (ii) 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 tolerances locality of axial engagement with the confronting side of the prism-and-prism-drive-subassembly, which in turn defines the respective rotary interfaces.