Image Invariant Optical Speckle Technique
Image invariant optical speckles can be formed by illuminating objects with coherent light. Potential applications are as follows.
• Recognition systems and authenticity verification by un-duplicable uniqueness
• Precision optical navigator for 3C products by differentiating adjacent optical speckles
• Optical alignment, linear scales and angle encoders by recording and analyzing the distribution of
optical speckles
• Patented in Taiwan, Japan, US, UK, France, Germany, and etc.