| 摘要 |
<p>In a fibre-optical strain-gauge of the kind comprising a mechanical construction providing a linear, strain-dependent relative movement of oppositely positioned spaced-apart first and second optical fibre-holding elements in a direction substantially perpendicular to the axial direction of the optical fibres, and in which the varying transmission of light between the two fibres is used as an indication of the strain, the main new feature is that the strain-gauge is manufactured using the following steps: a) prestressing an optical fibre by applying a pulling force, or prestressing the mechanical construction by applying a compressing force; b) fixing said optical fibre to the fibre-holding elements in the mechanical construction; and c) cleaving the optical fibre at the interspace between the fibre-holding elements. With this arrangement the optical fibre ends are aligned in an exact position in a simple manner without using any expensive micro-manipulation tools, and a high precision of the gap between the two fibre ends can be provided in a simple manner by controlling the prestressing of the optical fibre, or the mechanical construction.</p> |
