RT Journal Article
T1 Improved Phase-Shifting Method for Automatic Processing of Moiré Deflectograms
A1 Canabal Boutureira, Héctor Alfonso
A1 Quiroga Mellado, Juan Antonio
A1 Bernabéu Martínez, Eusebio
AB An improved moiré deflectometry phase-shifting technique is presented. A squared grating is used to multiplex the information of the deflections in two orthogonal directions in one image. This procedure avoids the need to rotate the gratings to obtain complete deflection information. However, the use of these gratings makes impossible the application of standard phase-shifting algorithms. Specifically, the problems associated with the nonsinusoidal profile of the moiré fringes and the low-modulation areas produced by the square gratings are solved. A modified moiré deflectometry phase-shifting method is designed to deal with these problems. In addition, a method to obtain the zero order of the prismatic effect is developed. The technique configures a complete and automatic method of mapping ray deflections. From them the refractive power maps can be derived. Experimental results obtained with a progressive-addition lens are shown.
PB The Optical Society of America
SN 0003-6935
YR 1998
FD 1998-09-10
LK https://hdl.handle.net/20.500.14352/58795
UL https://hdl.handle.net/20.500.14352/58795
LA eng
NO Canabal Boutureira, H., Quiroga Mellado, J. A., Bernabéu Martínez, E. «Improved Phase-Shifting Method for Automatic Processing of Moiré Deflectograms». Applied Optics, vol. 37, n.o 26, septiembre de 1998, pp. 6227-33. opg.optica.org, https://doi.org/10.1364/AO.37.006227.
DS Docta Complutense
RD 6 abr 2025