Extending high-angular accuracy to a near omni-directional 3D range sensor

Albert Iavarone; Reda Fayek

doi:10.1117/12.604426

19 May 2005 Extending high-angular accuracy to a near omni-directional 3D range sensor

Albert Iavarone, Reda Fayek

Proceedings Volume 5791, Laser Radar Technology and Applications X; (2005) https://doi.org/10.1117/12.604426
Event: Defense and Security, 2005, Orlando, Florida, United States

Abstract

The emergence of tripod-mounted lidar sensors as a viable method of 3D data collection has provided users with the ability to interrogate structures using high-resolution, metrically accurate 3D measurements. As with any measurement device, the accuracy of the collected data is of paramount importance. Angular accuracy is a crucial parameter in the overall performance of a 3D range sensor. This is particularly true in long-range applications where angular errors would be amplified proportionately to the target range. Consequently, angular accuracy is the determining factor in the accuracy of a long-range tripod mounted laser scanner. Recent advances in laser scanning technologies enabled significant increases in the addressable field-of-view (FOV) of 3D scanners. The most common embodiment of such systems incorporates two axes-rotation mechanisms. Typically, a rapidly oscillating mirror directs a laser beam into a “sheet” of light covering a vertical plane. This plane, in turn, is rotated around a vertical axis to provide nearly omni-directional coverage of the scene. A 3D measurement system's angular accuracy depends on two angular characteristics: angular resolution and angular repeatability. The systems described above could suffer on both dimensions. In this case the angular resolution is determined by the available angular position sensors yielding angular increments that are too crude for long-range 3D measurements. Similarly, angular repeatability of the available actuators suffers from non-linearities and other mechanical instabilities. The combined results are a data set that is less accurate than what is achievable in small FOV systems of similar configuration.

Citation Download Citation

Albert Iavarone and Reda Fayek "Extending high-angular accuracy to a near omni-directional 3D range sensor", Proc. SPIE 5791, Laser Radar Technology and Applications X, (19 May 2005); https://doi.org/10.1117/12.604426

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
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Laser scanners

Scanners

Sensors

3D scanning

Spatial resolution

3D metrology

Mirrors

Show All Keywords

Keywords/Phrases

Search In:

Publication Years