Using a single-cube beam-splitter as a fringe pattern generator within a structured-light projection system for surface metrology

Juan A. Rayas; Miguel León-Rodríguez; Amalia Martínez-García; Katia Genovese; Orlando M. Medina; Raúl R. Cordero

doi:10.1117/1.OE.56.4.044103

12 April 2017 Using a single-cube beam-splitter as a fringe pattern generator within a structured-light projection system for surface metrology

Juan A. Rayas, Miguel León-Rodríguez, Amalia Martínez-García, Katia Genovese, Orlando M. Medina, Raúl R. Cordero

Author Affiliations +

Optical Engineering, Vol. 56, Issue 4, 044103 (April 2017). https://doi.org/10.1117/1.OE.56.4.044103

Abstract

We show how a sinusoidal fringe pattern can be obtained by using a single cube beam splitter based on the Gates’ interferometer configuration. When an expanded and collimated laser beam hits the binding edge of a nonpolarizing cube beam splitter parallel to the splitter coating, it generates interference fringes at the exit due to the internal reflections and refractions of the laser beam passing through the cube. Unlike common digital projection systems, the proposed optical arrangement generates a perfectly sinusoidal and continuous fringe pattern, minimizing the problems associated with the discretization of a synthetic digital signal. The fast Fourier transform and phase-shifting techniques are used to demodulate the captured fringe patterns. Experimental results are presented for the three-dimensional shape reconstruction of the relief of a coin and of a spherical indentation on a piece of aluminum with a maximum height of about 150 μm. In addition, we evaluate the accuracy and resolution of the proposed measuring device: shape reconstruction accuracy is about 1.4% and axial resolution is 0.15 μm. Due to its simple and compact setup, the proposed system is particularly suited to be miniaturized.

Citation Download Citation

Juan A. Rayas, Miguel León-Rodríguez, Amalia Martínez-García, Katia Genovese, Orlando M. Medina, and Raúl R. Cordero "Using a single-cube beam-splitter as a fringe pattern generator within a structured-light projection system for surface metrology," Optical Engineering 56(4), 044103 (12 April 2017). https://doi.org/10.1117/1.OE.56.4.044103

Received: 16 December 2016; Accepted: 27 March 2017; Published: 12 April 2017

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