| 摘要 |
To minimize the uncompensated part of the Shupe error, a thermally stable material (28, 44, 46) is added to a composite coil (20) to dominate the composite in terms of thermal expansion and elastic modulus. The thermally stable material includes a plurality of fibers (28, 44, 46) selected from a material group which possesses a high modulus and a low coefficient of thermal expansion. The preferred fiber is formed from a carbon-graphite material which is selectively wound within the optical fibers (22) in the coil and/or is wound about the interior and exterior circumferences of the coil. |
