| 摘要 |
PCT No. PCT/DK92/00177 Sec. 371 Date Nov. 24, 1993 Sec. 102(e) Date Nov. 24, 1993 PCT Filed Jun. 4, 1992 PCT Pub. No. WO92/21949 PCT Pub. Date Dec. 10, 1992.A method of determining induced change of polarization state of light in a polarization element comprising transmitting unpolarized light from a light source at the one end of an optical transmitter waveguide means (21) to polarizer means (31) at the other end; polarizing the unpolarized light by the polarizer means (31); transmitting the polarized light through the polarization element (41, 41A, 41B) using at least one reflective optical element; analyzing the transmitted polarized light from the polarization element by an analyzer means (32); and transmitting the analyzed polarized light from the one end of optical receiver waveguide means (22) to a light detector at the other end; wherein the unpolarized light polarized by the polarizer means (31), the polarized light analyzed by the analyzer means (32), or both, are non-collimated; and the polarized light in the light path between the polarizer means (31) and the analyzer means (32) is collected and reflected by at least one reflective imaging optical element (51) so that the analyzed light exits the analyzer means (32) from the same side as the unpolarized light enters the polarizer (31). Further, fiber optic sensor devices for determining induced change of polarization state of light in a polarization element, particularly linear birefringence induced by electric voltage, electric field, and mechanical force, and circular birefringence induced by electric current and magnetic field. |
