US 12,092,875 B1
Rotatable capsule for a fiber optic rotary joint
Boying B. Zhang, Hamilton, NJ (US); and Hong Zhang, Singapore (SG)
Assigned to Princetel, Inc., Hamilton, NJ (US)
Filed by Princetel, Inc., Hamilton, NJ (US)
Filed on May 2, 2024, as Appl. No. 18/653,653.
Int. Cl. G02B 6/36 (2006.01); G02B 6/44 (2006.01); G02B 6/38 (2006.01)
CPC G02B 6/3604 (2013.01) [G02B 6/4427 (2013.01); G02B 6/3871 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A rotary joint assembly for underwater applications, comprising:
a fiber optic rotary joint having a body with a rotor section and a stator section and a dry chamber within the body;
a capsule having a housing sized and configured to receive the fiber optic rotary joint, the housing having a housing inlet opening and a chamber defined by an interior of the housing and holding the fiber optic rotary joint, the chamber configured to be completely filled with a non-conductive and non-compressible fluid, the housing having a fiber bundle outlet sized and configured to receive a second fiber bundle of the fiber optic rotary joint; and
a rotatable shaft rotatably coupled to the housing from the housing inlet opening and extending in the chamber, the rotatable shaft having a shaft bore configured for holding a first fiber bundle of the fiber optic rotary joint.