The rational use of lasers as sources radiation is also related to the development optical systems for conversion laser radiation. One ways convert its collimation, changing cross-section and divergence. This article presents a methodology designing two component reduce divergence beams. Ready-made elements were used, with which three different configurations created analyzed. design was develo...

Light can carry both spin and orbital angular momentum. While it is known that a nonparaxial circularly polarized beam couples the momentum to momentum, this phenomenon does not hold upon collimation of field. With rising interest in epsilon-near-zero photonics, integral ingredients field are beam-shaping capabilities such regime. In work, experimentally shown permanent conversion spin-to-orbit...

In order to have highly flexible secondary beamlines collimation is crucial. Collimators are blocks of material placed along the beamline that let main beam pass within collimator aperture limits, while most particles beyond it interact in and gets absorbed or loses enough energy be deflected away from core by magnets downstream. Some can at edge collimators accepted beam, creating background f...

The high power multimode fiber-coupled laser sources, like solid state lasers or laser diodes as well as single mode and multimode fiber lasers, are now widely used in various industrial laser material processing technologies like metal or plastics welding, cladding, hardening, brazing, annealing. Performance of these technologies can be essentially improved by varying the irradiance profile of...

This study assessed the potential of using megavoltage CT (MVCT) images taken with high density skin collimation in place for electron beam treatment planning. MVCT images were taken using the TomoTherapy Hi-Art system (TomoTherapy Inc., Madison, WI), and the CT numbers were converted to density by calibrating the Hi-Art system using an electron density phantom. Doses were computed using MVCT i...