A method for generating a diameter-enlarged end on an optical fiber, includes placing a longitudinal subsection of a longitudinal section of the fiber into a heating zone and heating the longitudinal subsection, wherein first and second sides of the longitudinal section on either side of the longitudinal subsection are situated outside the heating zone; compressing the heated longitudinal subsection in a longitudinal direction of the optical fiber; pushing the first side of the longitudinal section toward the heating zone in the longitudinal direction and pulling the second side of the longitudinal section away from the heating zone in the longitudinal direction, wherein the first side of the longitudinal section is pushed to a greater degree than the second side of the longitudinal section is pulled, and generating an optical entry surface of the fiber by cutting the enlarged longitudinal subsection transversely to the longitudinal direction of the fiber.

A portable computing device includes a processor, a memory, and a portable computing device case that encloses one or more integrated circuits, including at least the processor and the memory. The case includes a molded fiber-reinforced polymer (FRP) material that includes a polymer material and elongated fibers that adhere to the polymer material and that have a property that varies over a length of the fibers along an elongation axis of the fibers, wherein an adhesion strength between the fibers and the polymer is determined at least in part by a property of the fibers that varies over a length of the fibers along the elongation axis.

A portable computing device includes a processor, a memory, and a portable computing device case that encloses one or more integrated circuits, including at least the processor and the memory. The case includes a molded fiber-reinforced polymer (FRP) material that includes a polymer material and elongated fibers that adhere to the polymer material and that have a property that varies over a length of the fibers along an elongation axis of the fibers, wherein an adhesion strength between the fibers and the polymer is determined at least in part by a property of the fibers that varies over a length of the fibers along the elongation axis.

A cleaving assembly and a method for cleaving a glass body having a face at a desired angle greater than 0 degrees are disclosed. The assembly comprises a laser device for emitting a laser beam, a rotating device, and a positioning fixture. The rotating device has a head that rotates about a central axis that is orthogonal to the laser beam. The positioning fixture is operatively mounted to the head and centered axially along the central axis and is also rotatably driven by the rotating device. The positioning fixture has a tapered surface that is transverse to the central axis and that supports the glass body at a predetermined angle relative to the central axis. Rotation of the positioning fixture about the central axis when the glass body is exposed to the laser beam, cleaves the face of the glass body at the desired angle due to the glass body being supported transverse to the central axis.

A cleaving assembly and a method for cleaving a glass body having a face at a desired angle greater than 0 degrees are disclosed. The assembly comprises a laser device for emitting a laser beam, a rotating device, and a positioning fixture. The rotating device has a head that rotates about a central axis that is orthogonal to the laser beam. The positioning fixture is operatively mounted to the head and centered axially along the central axis and is also rotatably driven by the rotating device. The positioning fixture has a tapered surface that is transverse to the central axis and that supports the glass body at a predetermined angle relative to the central axis. Rotation of the positioning fixture about the central axis when the glass body is exposed to the laser beam, cleaves the face of the glass body at the desired angle due to the glass body being supported transverse to the central axis.

A bundle includes five or more cut elongated glass elements. Each cut elongated glass element includes a first end, a cylindrical portion, and a second end. At least one of the following equations is fulfilled: i) (I.sub.center(max)I.sub.center(min))/I.sub.center(mean)4.010.sup.2 [m/m]; or ii) (I.sub.continuous(max)I.sub.continuous(min))/I.sub.center(mean)4.010.sup.2 [m/m]. I.sub.center(max) is a maximum center inner diameter of the cylindrical portions of all cut elongated glass elements; I.sub.center(min) is a minimum center inner diameter of the cylindrical portion of all cut elongated glass elements; I.sub.center(mean) is a mean of inner diameters at a center of the cylindrical portions of all cut elongated glass elements; I.sub.continuous(max) is a maximum continuous inner diameter of the cylindrical portion of any single cut elongated glass element; and I.sub.continuous(min) is a minimum continuous inner diameter of the cylindrical portion of the single cut elongated glass element.

A bundle includes five or more cut elongated glass elements. Each cut elongated glass element includes a first end, a cylindrical portion, and a second end. At least one of the following equations is fulfilled: i) (I.sub.center(max)I.sub.center(min))/I.sub.center(mean)4.010.sup.2 [m/m]; or ii) (I.sub.continuous(max)I.sub.continuous(min))/I.sub.center(mean)4.010.sup.2 [m/m]. I.sub.center(max) is a maximum center inner diameter of the cylindrical portions of all cut elongated glass elements; I.sub.center(min) is a minimum center inner diameter of the cylindrical portion of all cut elongated glass elements; I.sub.center(mean) is a mean of inner diameters at a center of the cylindrical portions of all cut elongated glass elements; I.sub.continuous(max) is a maximum continuous inner diameter of the cylindrical portion of any single cut elongated glass element; and I.sub.continuous(min) is a minimum continuous inner diameter of the cylindrical portion of the single cut elongated glass element.

The present invention discloses a fabrication method and use of a 40 mm sized fiber optic image inverter, belonging to the field of manufacturing of fiber optic imaging elements. The light-absorbing glass for preparing the 40 mm sized fiber optic image inverter consists of the following components in molar percentage: SiO.sub.2 60-69.9, Al.sub.2O.sub.3 1.0-10.0, B.sub.2O.sub.3 10.1-15.0, Na.sub.2O 1.0-8.0, K.sub.2O 3.0-10.0, MgO 0.1-1.0, CaO 0.5-5.0, ZnO 0-0.1, TiO.sub.2 0-0.1, ZrO.sub.2 0.1-1.0, Fe.sub.2O.sub.3 3.0-6.5, Co.sub.2O.sub.3 0.1-0.5, V.sub.2O.sub.5 0.51-1.5 and MoO.sub.3 0.1-1.0. The 40 mm sized fiber optic image inverter has the advantages of low crosstalk of stray light, high resolution and high contrast.

The present invention discloses a fabrication method and use of a 40 mm sized fiber optic image inverter, belonging to the field of manufacturing of fiber optic imaging elements. The light-absorbing glass for preparing the 40 mm sized fiber optic image inverter consists of the following components in molar percentage: SiO.sub.2 60-69.9, Al.sub.2O.sub.3 1.0-10.0, B.sub.2O.sub.3 10.1-15.0, Na.sub.2O 1.0-8.0, K.sub.2O 3.0-10.0, MgO 0.1-1.0, CaO 0.5-5.0, ZnO 0-0.1, TiO.sub.2 0-0.1, ZrO.sub.2 0.1-1.0, Fe.sub.2O.sub.3 3.0-6.5, Co.sub.2O.sub.3 0.1-0.5, V.sub.2O.sub.5 0.51-1.5 and MoO.sub.3 0.1-1.0. The 40 mm sized fiber optic image inverter has the advantages of low crosstalk of stray light, high resolution and high contrast.

A method for obtaining cut elongated glass elements includes: providing a continuous elongated glass element; continuously measuring one or more geometric parameters of the continuous elongated glass element to obtain one or more continuous geometric parameters; cutting the continuous elongated glass element to obtain cut elongated glass elements; measuring one or more geometric parameters at one or more points along a rotation axis of one or more of the cut elongated glass elements to obtain one or more individual geometric parameters; and connecting the one or more of the continuous geometric parameters with the one or more of the individual geometric parameters.