ILD Intelligent Measuring Instrument Of Laser Diffraction Light Intensity

Diffraction, Which is the most common optical phenomenon, presents an extensive application prospect in the field of precision measurement because of the development of Laser and information technology. Intelligent Measuring Instrument of Laser Diffraction Light Intensity is the kind of fine measuring instrument. This paper puts emphasis on formulating the basic principle, structure and application of the measuring instrument by coupling of the theory of diffraction, sensor technology and interface technology.This paper discusses some problems of microspur measure on the basis of diffraction. Diffraction pattern that is generated through a branch of Laser exposures a slit (filament) is sampled by linear SSPA and intensity signal is transferred into electric pulse that is amplified, sampled and hold. Then after ADC0804 A/D transferred the signal is inputted into computer. Finally by means of data processing the key parameter―spacing interval of shade stripe center is achieved. Comparing with the traditional diffraction instruments, the intensity instrument makes a feature of precision, intelligent and utility.In the end of this paper, measuring error of the instrument is discussed and the method of reducing error is introduced in brief.Microspur measure by diffraction method that includes the technology of Laser, sensor and information processing has been an emerging technology and is used widely in scientific experiment, industrial measuring and detecting apparatus. With the further research, the intensity instrument will has a broader prospect.