Real-Time Shape Measurement by Grating Projection Method Applied to Electronic Packaging

Details Real-Time Shape Measurement by Grating Projection Method Applied to Electronic Packaging Real-Time Shape Measurement by Grating Projection Method Applied to Electronic Packaging

Apr 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1236..401m&link_type=abstract

INTERNATIONAL CONFERENCE ON ADVANCED PHASE MEASUREMENT METHODS IN OPTICS AND IMAGING. AIP Conference Proceedings, Volume 1236,

Physics

Optics

Memory Architecture, Diffraction Gratings, Cameras, Phase Measurement, Image Processing, Optical Storage Systems, Optical Disks, Gratings, Optical Elements, Devices, And Systems, Phase Retrieval, Image Forming And Processing

Scientific paper

In this study, a system using a Field Programmable Gate Array (FPGA) memory board is proposed to obtain the full-size shape without any reduction of the image in real-time. The memory of the FPGA memory board has a phase analysis table and phase-coordinate tables. The brightness data of the recorded grating are stored in the phase analysis table to obtain the phase of the recorded grating. The calibration data using a moving reference plane are stored as a phase-coordinate table to obtain the coordinates of the phase. An experiment to evaluate this system was performed. The analysis speed of shape measurement using the memory board did not depend on a speed of a personal computer. The accuracy of shape measurement using the memory board and using software was almost the same. The analysis speed using the memory board was faster than the one using software.

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