Patent ID: 6891926

Claim:
An apparatus, comprising a sensor and a bundle of optical fibers having first and second ends; wherein: the bundle of optical fibers at the first end extends in a first fiber direction and defines a first section plane that is normal to the first fiber direction; the first end defines a first end plane that is obliquely oriented with respect to the first section plane; the bundle of optical fibers at the second end extends in a second fiber direction and defines a second section plane that is normal to the second fiber direction; the second end defines a second end plane that is obliquely oriented with respect to the second section plane; the first and second end planes intersect at an intersection line; an orthogonal plane is defined orthogonal to a fiber direction of the bundle of optical fibers; the orthogonal plane intersects the intersection line at only one point; and the sensor is disposed in a confronting relation with the second end.