LIGHT VORTEX GENERATOR, MICROOBJECT OPERATING UNIT, ASTRONOMICAL PROBING EQUIPMENT, AND POLARIZATION VORTEX TRANSFORMATION ELEMENT

摘要

A light vortex generator comprising a first optical system for transforming coherent light into circularly polarized light, a polarization vortex transformation element arranged to receive circularly polarized light exiting from the first optical system, and a second optical system arranged to receive light exiting from the polarization vortex transformation element. The polarization vortex transformation element has linear birefringence and/or linear dichroism, its polarization characteristics are constant at each point on the same radius from the center of coordinate excluding the azimuth of main axis, and the azimuth of main axis at each point thereon is proportional to the azimuth of coordinate. The second optical system extracts the circularly polarized light component of reverse direction to that of the above-mentioned circularly polarized light from the light exiting from the polarization vortex transformation element.