15 October 2012 Using differential ray tracing in stray light analysis
Author Affiliations +
Abstract
This paper describes differential ray tracing and shows how it can be used to great advantage in stray light analysis. Tracing a differential ray from a source to a target yields a set of derivatives that contain a complete first-order description of a ray bundle surrounding the ray being traced. These derivatives provide the information needed for aiming rays and transforming a sample area on a target surface into a solid angle seen by the source. By using targeted differential rays, we eliminate the need for defining importance curves for generating scattered rays. Convergence is accelerated, and the resulting irradiance distributions end up smoother than what one usually obtains with the traditional Monte Carlo approach. This paper also shows how the derivatives from a single ray can be used to define and propagate Gaussian beams without the need for secondary rays.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
David F. Rock, David F. Rock, "Using differential ray tracing in stray light analysis", Proc. SPIE 8495, Reflection, Scattering, and Diffraction from Surfaces III, 84950X (15 October 2012); doi: 10.1117/12.946367; https://doi.org/10.1117/12.946367
PROCEEDINGS
14 PAGES


SHARE
RELATED CONTENT

OARDAS stray radiation analysis software
Proceedings of SPIE (September 26 1999)
OARDAS A New Ray Based Stray Radiation Analysis...
Proceedings of SPIE (June 02 1987)
Applying the tool stray light cross checks of the...
Proceedings of SPIE (August 10 2010)
Guerap II A Computer Program For The Analysis...
Proceedings of SPIE (September 25 1977)

Back to Top