| 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 square wave and noise excitation are analysed and compared. Two types of setups are arranged to determine the optical imprint technical parameters and quality of thermally replicated periodic microstructure. to analyze the quality of microstructure. 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 square and noise wave excitations. laser and photodiode bpw-34 are used to analyze the diffraction measurements. Square and noise waves are generated at a frequency of 8.460 KHz and an amplitude of 5V for evaluating the quality of periodical microstructure. Optical imprint technical parameters and quality of thermally replicated microstructure are defined using red and green lasers at different temperatures of 148℃, 152℃ and pressures ranging from 1 to 5 bar. In the end of the paper replicated microstructure are experimentally analysed using square and noise wave frequency. Furthermore, this method does not require expensive or complex developments of the experimental setup and could be applied in most equipment’s of thermal imprint. |
