LADAR scanner vertical distortion reduction via controlled signal modulation with a reconfigurable FPGA

J. Thomas; D. Megherbi; P. Sliney

doi:10.1117/12.624119

1 August 2005 LADAR scanner vertical distortion reduction via controlled signal modulation with a reconfigurable FPGA

J. Thomas, D. Megherbi, P. Sliney

Proceedings Volume 5873, Optical Scanning 2005; (2005) https://doi.org/10.1117/12.624119
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

In this paper, a method is discussed for reducing the vertical spatial distortion due to physical scanner characteristics. Unlike methods of spatial correction during acquisition, the distortion in this case can be noticeably reduced before it is ever even produced. Instead of spatial correction, this method can be thought of as distortion reduction. This method is advantageous because it can be applied before a given Ladar image acquisition phase. During the acquisition phase, error is introduced due to approximations, and noise among other things. If the distortion can be reduced before the acquisition phase occurs, a higher accuracy can be achieved. The method presented here is based on the way the vertical scanner is driven. We show that if the vertical scanner is driven with a square wave of the correct frequency, a much more uniform vertical scanning pattern can be realized. We also show that this can easily be incorporated into an FPGA-based laser scanner controller.

Citation Download Citation

J. Thomas, D. Megherbi, and P. Sliney "LADAR scanner vertical distortion reduction via controlled signal modulation with a reconfigurable FPGA", Proc. SPIE 5873, Optical Scanning 2005, (1 August 2005); https://doi.org/10.1117/12.624119

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