高精度激光准直及其可能应用

我们对三点法点光源的稳定性和光束传输的影响因素作了实验研究,制成一台21米长、精度为±0.6～0.8微米(或±3～4×10~(-8))的激光准直实验装置。利用这台装置,测出了人造断层的潮汐变化,小潮期间,24小时水平位移最大变幅不超过11微米。分析了用于地震预报、测定大坝变形和调整粒子加速器的可能性,讨论了广义相对论时空弯曲对准直光束的影响。

High accuracy laser alignment and its potential applications

Experimental researches on the stability of the point light source in the “three point method”and the factors affecting the transmission of light beam were carried out,and a 21m long experimental arrangement for laser alignment with an accuracy of ±0.6～0.8μm (or ±3～4×10-8) was developed.The tide change of an artificial fault was measured with the arrangement,the maximum change for level displacement in 24 hours for a small tide period is within 11μm.The potentia- lity for prediction of earthquake,measurement of dam deformation and adjust- ment of particle accelarators are analyzed,effects of generalized relativistic temporal-spatial bending on aligning light beam are discussed.