Surgical instrument

An instrument for surgery, in particular minimally invasive surgery, said instrument comprising:

• an elongate frame which, in the vicinity of a first end thereof, comprises an operating element (3), and, at a second end thereof, at least one working element (4), characterized in that the instrument (1) comprises means for feeding back a force which is exerted on the working element (4) of the instrument to the operating element (3), which means comprise at least a first force sensor (6) for measuring the force which is exerted on the working element, a control unit (10) and a first actuator (11) which is coupled to the operating element, the control unit being configured to control at least the first actuator (11) on the basis of a signal which originates from the first force sensor, wherein the first force sensor (6) comprises a glass fiber (16) configured to guide optical signals to and from the working element (4), whereby a light source and a light sensor are arranged in the vicinity of a first end of the glass fiber, and a second end of the glass fiber is fixed to the working element (4), and whereby a reflective surface (17) is arranged on the working element (4) at a defined distance from the second end of the glass fiber, which reflective surface reflects at least a proportion of the light which originates from the light source and emerges from the second end of the glass fiber into the second end of the glass fiber.