Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Flying spot laser triangulation scanner using lateral synchronization for surface profile precision measurement

Not Accessible

Your library or personal account may give you access

Abstract

High-speed surface profile measurement with high precision is crucial for target inspection and quality control. In this study, a laser scanner based on a single point laser triangulation displacement sensor and a high-speed rotating polygon mirror is proposed. The autosynchronized scanning scheme is introduced to alleviate the trade-off between the field of view and the range precision, which is the inherent deficiency of the conventional triangulation. The lateral synchronized flying spot technology has excellent characteristics, such as programmable and larger field of view, high immunity to ambient light or secondary reflections, high optical signal-to-noise ratio, and minimum shadow effect. Owing to automatic point-to-point laser power control, high accuracy and superior data quality are possible when measuring objects featuring varying surface characteristics even in demanding applications. The proposed laser triangulation scanner is validated using a laboratory-built prototype and practical considerations for design and implementation of the system are described, including speckle noise reduction method and real-time signal processing. A method for rapid and accurate calibration of the laser triangulation scanner using lookup tables is also devised, and the system calibration accuracy is generally smaller than ±0.025mm. Experimental results are presented and show a broad application prospect for fast surface profile precision measurement.

© 2014 Optical Society of America

Full Article  |  PDF Article
More Like This
Laser range finder based on synchronized scanners

Marc Rioux
Appl. Opt. 23(21) 3837-3844 (1984)

Dynamic symmetrical pattern projection based laser triangulation sensor for precise surface position measurement of various material types

Klemen Žbontar, Matjaž Mihelj, Boštjan Podobnik, Franc Povše, and Marko Munih
Appl. Opt. 52(12) 2750-2760 (2013)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (13)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (3)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved