The Multiple source angles (plane waves) direction type creates collimated ray bundles at each of the specified directions. One ray is created at each ray position for each active source angle. For example, if the ray positions specification is a grid plane with 10 rays in X and 10 rays in Y with a rectangular aperture and there are 3 active source angles, then 300 rays will be created (100 rays for each of the source angles). The ray directions are given by direction tangents using the equations below, where a, b, and c are the x, y, and z components of the ray's direction vector and qx and qy are the angles of the multiple source angles direction specification.
The sign conventions for the ray directions are specified in the following diagram:
This feature can be accessed by selecting Multiple source angles (plane waves) as the ray direction type on the Positions/Directions tab of a detailed source dialog box.
Ray Directions - Focus to / from two astigmatic focii Ray Directions - Astigmatic Gaussian beam Ray Directions - Focus to / from a point Ray Directions - Multiple source positions Ray Directions - Random directions into an angular range Ray Directions - Random directions into a sphere Ray Directions - Single direction (plane wave) Ray Directions - Directions to hexagonal grid points in angle space Ray Directions - Randomly according to intensity distribution Ray Directions - M Squared Laser Beam
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