Evaluation of laser based alignment algorithms under additive random and diffraction noise

Wilbert A. McClay III; Abdul Ahad Sami Awwal; Holger E. Jones; Karl Child Wilhelmsen; Walter Ferguson; Michael McGee; Mark G. Miller

doi:10.1117/12.563804

4 November 2004 Evaluation of laser-based alignment algorithms under additive random and diffraction noise

Wilbert A. McClay III, Abdul Ahad Sami Awwal, Holger E. Jones, Karl Child Wilhelmsen, Walter Ferguson, Michael McGee, Mark G. Miller

Author Affiliations +

Proceedings Volume 5556, Photonic Devices and Algorithms for Computing VI; (2004) https://doi.org/10.1117/12.563804
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

Abstract

The purpose of the automatic alignment algorithm at the National Ignition Facility (NIF) is to determine the position of a laser beam based on the position of beam features from video images. The position information obtained is used to command motors and attenuators to adjust the beam lines to the desired position, which facilitates the alignment of all 192 beams. One of the goals of the algorithm development effort is to ascertain the performance, reliability, and uncertainty of the position measurement. This paper describes a method of evaluating the performance of algorithms using Monte Carlo simulation. In particular we show the application of this technique to the LM1_LM3 algorithm, which determines the position of a series of two beam light sources. The performance of the algorithm was evaluated for an ensemble of over 900 simulated images with varying image intensities and noise counts, as well as varying diffraction noise amplitude and frequency. The performance of the algorithm on the image data set had a tolerance well beneath the 0.5-pixel system requirement.

Citation Download Citation

Wilbert A. McClay III, Abdul Ahad Sami Awwal, Holger E. Jones, Karl Child Wilhelmsen, Walter Ferguson, Michael McGee, and Mark G. Miller "Evaluation of laser-based alignment algorithms under additive random and diffraction noise", Proc. SPIE 5556, Photonic Devices and Algorithms for Computing VI, (4 November 2004); https://doi.org/10.1117/12.563804

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