The real-time measurement by two-frequency grating

LASER TECHNOLOGY > 2007 > 31(4): 384-386,390.

WANG Xiang-hua, HE Xing-dao, FU Yan-jun. The real-time measurement by two-frequency grating[J]. LASER TECHNOLOGY, 2007, 31(4): 384-386,390.

Citation:

WANG Xiang-hua, HE Xing-dao, FU Yan-jun. The real-time measurement by two-frequency grating[J]. LASER TECHNOLOGY, 2007, 31(4): 384-386,390.

Citation:

WANG Xiang-hua, HE Xing-dao, FU Yan-jun. The real-time measurement by two-frequency grating[J]. LASER TECHNOLOGY, 2007, 31(4): 384-386,390.

Key Laboratory of Nondestructive Test(Ministry of Education), Nanchang Institute of Aeronautical Technology, Nanchang 330063, China

Abstract

In order to measure an object with some breaks precisely and in real-time,the two-frequency grating was created with VC++ first,and then the grating was projected on the surface of the object by LCD projector,so that the phase difference could be calculated by means of Fourier transform profilometry(FTP) from only one image,and the shape of the object could recur.Experiments indicate that this method is simple,exact and in real-time,it greatly promotes the development of FTP by two-frequency grating.

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[1]	DU L B,GAO X H,XIA J J et al.Research of a novel 3-D laser scanning system[J].Laser Technology,2005,29(4):366～369(in Chinese).
[1]	SHAO Zh Y,ZENG Z W,TANG P.Research of non-contact laser digitizing collection and machining system[J].Laser Technology,2004,28(5):524～526(in Chinese).
[2]	ZHAO J,ZHONG J G.Three-dimentioned shape measurement withdigital projecting system[J].Optical Technique,2002,28(6):555～558(in Chinese).
[3]	TAKEDA M,MUTOH K.Fourier transform profilometry for the automatic measurement 3-D object shapes[J].Appl Opt,1983,22(24):3977～3982.
[4]	JUDGE T R,BRYANSTON-CROSS P J.A review of phase unwrapping techniques in fringe analysis[J].Optics and Lasers in Engineering,1994,21(8):199～239.
[5]	ZHANG H,LALOR M J,BURTON D R.Spatiotemporal phase unwrapping for the measurement of discontinuous objects in dynamic fringe-projection phase-shifting profilometry[J].Appl Opt,1999,38(16):3534～3541.
[6]	LI F,ZHOU C L.A novel profilometry with dual-frequency grating[J].Acta Photonica Sinica,2005,34(4):632～635(in Chinese).
[7]	XU P,CHEN W J,SU X Y.Higher-precision FTP based on digitallight projecting[J].Opto-electronic Engineering,2005,32(11):59～62(in Chinese).
[8]	TIAN F,ZHAO H,CHEN W Y et al.A novel profilometry with projecting grating[J].Acta Optica Sinica,1996,16(10):1506～1509(in Chinese).
[9]	LIU H Q,CHEN W J,SU X Y et al.Fast Fourier transform profilometry based on two-frequency grating projection[J].Opto-electronic Engineering,2004,31(10):39～42.(in Chinese).

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