Apparatus and method for maintaining precise end-to-end relative position between two optical fibers

    公开(公告)号:US11061218B2

    公开(公告)日:2021-07-13

    申请号:US16828385

    申请日:2020-03-24

    Abstract: According to at least one embodiment of the present disclosure, there is provided an apparatus comprising: a first optical fiber in communication with a light source; a second optical fiber in communication with an imaging probe; and a fiber optic rotary joint (FORJ) where a distal end of the first optical fiber and a proximal end of the second optical fiber are positioned coaxially with a gap between the fibers' end faces. The FORJ is adapted to transmit light between the fibers' end faces, and to rotate at least one of first and second optical fibers relative to the other. An actuator is configured to axially translate at least one of the first and second optical fibers relative to the other in a reciprocal motion. A light intensity sensor is adapted to measure light intensity changes due to optical interference between light reflected from the fibers' end faces. And, a control system is configured to receive light intensity measurements from the sensor and to use the light intensity measurements to control the reciprocal motion of the linear actuator to maintain the length of the gap between fibers' end faces substantially constant.

    BEAM-STEERING DEVICES EMPLOYING ELECTROWETTING PRISMS

    公开(公告)号:US20190064502A1

    公开(公告)日:2019-02-28

    申请号:US15684287

    申请日:2017-08-23

    Abstract: A rotation-free beam-steering device for manipulating probing and reflected optical beams includes at least one electrowetting cell having at least one side wall defining an inner space. The at least one side wall has a lining adjacent to the inner space. A liquid at least partially fills the inner space. The liquid has at least one controlled surface not in contact with the wall lining. The liquid further has a contact angle with the wall lining. The at least one controlled surface is disposed to interface with an optical beam exiting from a distal end of an optical fiber at an incidence angle. At least two electrodes are provided separated from the inner space by the lining. An electrical potential on the at least two electrodes is controlled to adjust the contact angle of the liquid bounding the at least one controlled surface.

    OPTICAL ALIGNMENT OF FIBER-OPTIC ROTARY JOINT ASSEMBLY

    公开(公告)号:US20190033538A1

    公开(公告)日:2019-01-31

    申请号:US15658936

    申请日:2017-07-25

    Abstract: A first optical axis of a first optical component is caused to be at a first angle with respect to a first precision surface of the first optical component. A second optical axis of a second optical component is aligned to be at a second angle to a second flat surface of the second optical component. The second angle is equal to or derived from the first angle. The first and second flat surfaces are caused to directly face each other to allow only sliding motion between the first and second flat surfaces. The sliding motion is performed between the first and second flat surfaces until the first and second optical axes are sufficiently collinear.

Patent Agency Ranking