论文信息 - Strain microscope with grating diffraction method

Strain microscope with grating diffraction method

A compact microscope system for direct strain measurement is presented. It involves the grating diffraction method coupled with mi- croscopy and image-processing technique. A Leitz optical transmitting microscope with white light source was rebuilt to incorporate a loading and recording system. Gratings with median density from 40 to 200 lines/mm are used. With the help of a Bertrand lens, the Fourier spec- trum of the grating is formed on the CCD sensor plane with high image quality. Software that can precisely, quickly, and automatically determine the diffraction spot centroids has been developed. The local strain is measured with high resolution. Various ways of improving the sensitivity are suggested. © 1999 Society of Photo-Optical Instrumentation Engineers. (S0091-3286(99)02001-2)

Bing Zhao | Anand Asundi

[1] A. Lagarde,et al. Non-contact and nondisturbing local strain measurements methods. II: Applications , 1992 .

[2] J. Bell,et al. Determination of Dynamic Plastic Strain through the Use of Diffraction Gratings , 1956 .

[3] A. Lagarde,et al. Non-contact and non-disturbing local strain measurement methods. I: Principle , 1992 .

[4] Vincent J. Parks. A method for directly determining surface strain fields using diffraction gratings , 1972 .

[5] J. C. Moulder,et al. Two-dimensional strain analysis using a video optical diffractometer , 1993 .

[6] Emil Wolf,et al. Principles of Optics: Contents , 1999 .

[7] Geoff West,et al. A survey and examination of subpixel measurement techniques , 1990, ISPRS International Conference on Computer Vision and Remote Sensing.

[8] W. P. T. North,et al. The diffractographic strain gage , 1971 .

[9] A. Asundi,et al. CCD Based Moire Interferometric Strain Sensor (MISS) , 1989, Optics & Photonics.

[10] Yuwen Qin,et al. Grating Method - A New Technique For Strain Measurement , 1988, Other Conferences.

[11] Pierre Michel Boone. A method for directly determining surface strain fields using diffraction gratings , 1971 .

[12] C. E. Pugh,et al. Strain-field investigations with plane diffraction gratings , 1965 .

[13] A. Lagarde,et al. Grating interrogations: from small to large strain measurement , 1995 .

[14] James S. Sirkis,et al. Current trends in obtaining deformation data from grids , 1993 .