DISTANCE AND DISPLACEMENT MEASUREMENTS BY LASER TECHNIQUE

Diffractive optical element-based profilometer for surface inspection

[+] Author Affiliations
Giuseppe Schirripa Spagnolo

Universita` degli Studi “Roma Tre”, Dip. di Ingegneria Elettronica, Via Della Vasca Navale, 84 Rome Italy?00146 E-mail: giuseppe.schirripa@ele.uniroma3.it

Dario Ambrosini

Universita` degli Studi Dell’Aquila, INFM-Dip. Energetica, Loc. Monteluco di Roio, Roio Poggio, L’Aquila, Italy?67040 E-mail: dario@ing.univaq.it

Opt. Eng. 40(1), 44-52 (Jan 01, 2001). doi:10.1117/1.1331270
History: Received Jan. 1, 2000; Accepted May 21, 2000
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We introduce a new 3-D sensor based on a diffractive optical element (DOE). Structured light is obtained by the interference of two beams. The design of the projection unit has the following features: the system is very simple, small and cheap and the fringe spacing is easily adjustable. Fringes generated by the DOE interferometer are analyzed by Fast Fourier Transform (FFT) method, which produced a 3-D perspective plot. The technique and the experimental results of real surface profiles are given. © 2001 Society of Photo-Optical Instrumentation Engineers.

© 2001 Society of Photo-Optical Instrumentation Engineers

Citation

Giuseppe Schirripa Spagnolo and Dario Ambrosini
"Diffractive optical element-based profilometer for surface inspection", Opt. Eng. 40(1), 44-52 (Jan 01, 2001). ; http://dx.doi.org/10.1117/1.1331270


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