Target-oriented Gaussian beam migration using a modified ray tracing scheme

A three-dimensional Gaussian-beam ray-tracing program for designing interferometer/polarimeter plasma diagnostics

A three-dimensional Gaussian-beam ray-tracing program for designing interferometerÕpolarimeter plasma diagnostics

We have developed a three-dimensional Gaussian-beam ray-tracing program to aid in the design of infrared, far-infrared, and millimeter wave interferometer and polarimeter diagnostic systems for magnetic confinement fusion relevant plasma physics experiments. An overview of the program is presented along with a description of the ray-tracing algorithm. A model is developed for the case of diffra...

PYSHA: a shadow-testing acceleration scheme for ray tracing

The paper presents a new data structure called a shadow pyramid for storing 3D objects to reduce the shadow-testing time during ray tracing. For each primitive object that first intersects a ray, a shadow pyramid is constructed in which all the candidate objects that possibly block the path from the relevant light source to any point on the primitive object are registered. Shadow testing of. th...

Space Time Ray Tracing using Ray Classification

Throughout the history of computer graphics, a very active area of research has been the attempt to create convincing, life-like images. Ray tracing is a technique for generating photorealistic images, and can easily support a wide range of natural phenomenon. However, producing a ray traced image is very expensive; and producing a ray traced animation is often prohibitively expensive. This the...

Beam shaping using Gaussian beam modes.

A beam shaping method is presented where a diffractive optical element (DOE) is designed by optimizing the complex mode coefficient weights of a set of Gaussian beam modes. This method is compared with the more standard unidirectional approach. Differential evolution is used for the optimization in both the unidirectional and Gaussian beam mode optimization methods. For the particular transform...