Papers by Keyword: Dynamic Focusing

Abstract: In the processing of the mold texture, the traditional chemical etching exits the shortcomings of the pollution and the long processing cycle. This article will introduce 3D laser processing technology to the mold industry, based on the laser etching principle on the metal surface, etch processing can be made in the mold surface. Through theoretical derivation from the 3D laser scanning optical system, the 3D laser scanning hardware system is structured to apply in the mold cavity texturing, the control algorithm has been studied, and finally in the developed laser-etch machine the texturing experimental is performed on the injection molds.

Abstract: In the paper the new type of mobile sensor based on optical coherence tomography is presented. For increasing the measurement range the special dynamic focusing system which moves imaging plane during axial scanning process is used. Therefore developed system allows focusing on measured layer. Additionally, for image analysis the special type of CMOS matrix (called smart-pixel camera), synchronized with a reference mirror transducer, is applied. Due to hardware realization of a fringe contrast analysis simultaneously in each pixel with high frequency, the time of measurement decreases significantly. These advantages together with a compact design allow the sensor to be used as the mobile device for measurements of surface topography, thickness of surface layers and subsurface defects detection in laboratory, workshop and out-door conditions. Calibration of the designed sensor and its application to the technological measurements of the sticker label layers are presented and discussed.