Efficient automatic computation of veiling glare from scatter and ghosts by a simple modification to Monte Carlo ray tracing

Alan W. Greynolds

doi:10.1117/12.2019942

27 September 2013 Efficient automatic computation of veiling glare from scatter and ghosts by a simple modification to Monte Carlo ray tracing

Alan W. Greynolds

Author Affiliations +

Proceedings Volume 8840, Optical Modeling and Performance Predictions VI; 884007 (2013) https://doi.org/10.1117/12.2019942
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

Abstract

Veiling glare is a somewhat obsolete term referring to stray light from an in-field extended source bleeding into adjacent dark regions of the image. In most systems ghost reflections and scatter from the contaminated or imperfectly polished optical surfaces are the main culprits. Standard stochastic or deterministic methods for calculating scattered light from out-of-field sources are cumbersome in this domain. On the other hand, basic Monte Carlo ray tracing is straightforward. Its implementation in the GelOE optical engineering software is based on a fast hybrid physical-optics/geometricaloptics technique for surface scatter. However, a prohibitive number of rays are still required to get accurate results. Instead of the standard ray-splitting and importance-area modifications to make it more efficient, a much simpler one is proposed and then applied to a representative lens system, resulting in a 100 to 1000 fold reduction in the number of rays required for the same accuracy.

Citation Download Citation

Alan W. Greynolds "Efficient automatic computation of veiling glare from scatter and ghosts by a simple modification to Monte Carlo ray tracing", Proc. SPIE 8840, Optical Modeling and Performance Predictions VI, 884007 (27 September 2013); https://doi.org/10.1117/12.2019942

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
14 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Ray tracing

Stray light

Mirrors

Monte Carlo methods

Scattering

Error analysis

Light scattering

Show All Keywords

Keywords/Phrases

Search In:

Publication Years