MOIRE MEASUREMENT DEVICE USING A DIGITAL MICROMIRROR DEVICE WHICH INCREASES A PHASE TRANSITION SPEED

摘要

PURPOSE: A moire measurement device using a digital micromirror device is provided to reduce a measurement error and to accurately measure the elevation of an object by easily controlling an interval of grid images.;CONSTITUTION: A moire measurement device using a digital micromirror device(110) comprises a light source, a beam splitter(130), a first light projection unit(140), a second light projection unit(150), a grid image photo diode(170), and an image processing unit. The digital micromirror device creates the phase-shifted grid image by controlling the radiated light. The second light projection unit blocks projecting of the grid image while the first light projection unit is projecting the grid image. The first light projection unit blocks projecting of the grid image while the second light projection unit is projecting the grid image.;COPYRIGHT KIPO 2010