| Abstract [eng] |
Sensors are widely used in bio-sensing of processes, such as analysis of concentration of micro particles in biological environment. Diffraction grating is one of the main optical components of a sensor and It helps in splitting the light into several beams. Diffraction grating is produced by mechanical hot imprint method. In this research study quality of microstructures, created by pulse wave and arbitrary excitation are analysed and compared. Two types of tests are performed to measure the diffraction efficiency and defects in replicated microstructure, in order to analyse the quality of microstructure. Diffraction efficiency is measured from the data obtained from experimental setup. Defects in replicated microstructure is measured using an optical microscope with CCD camera. vibro-active pad, whose fundament is piezoelectric element, is used to generate high frequency longitudinal vibrations. At the same temperature, pressure and time modes, two types of microstructures are created by Pulse and Arbitrary wave excitations. Laser and photodiode BPW-34 are used to Analysed the diffraction measurements. Dependency of Diffraction efficiency on Diffraction maxima is defined using red and green lasers at different temperatures 148℃, 152℃ and pressures ranging from 1 to 5 Bar. In the end of the paper replicated microstructure are experimentally analysed using already discussed using Diffraction efficiency and Optical microscope parameter. Furthermore, this method does not require expensive or complex developments of the experimental setup and could be applied in most equipments of thermal imprint. |
