| 摘要 |
<p>PURPOSE:To make it possible to detect a shock current generating position without using a power source, by a method wherein a shock current is converted to laser beams by semiconductor laser and light delayed by optical fibers different in a length and direct light are combined to be outputted to measure the time difference of both of them. CONSTITUTION:A shock current 1 is inputted to semiconductive laser 3 through a protective circuit 2 to be converted to laser beams which are in turn supplied to a polarization beam splitter 6 through a first micro-lens 4 and a polarizing plate 5. Separated one output light is delayed by a second micro-lens 8, oval jacket shaped polarizing plane preserving optical fibers 9 and a third micro-lens 10 to be converted to output light 11 which is in turn outputted along with the other output light 7. In this constitution, when the lengths of the polarizing plane preserving optical fibers 9 are changed at every shock current generation detecting apparatus, because the output light 7 and the output light 11 are different in a time interval, it is known where the falling of a thunderbolt occurs.</p> |
