Based on the Black-body radiation theory, a multi-wavelength photoelectric detection system for the on-line measurement of temperature and components of the detonation field is designed. In this system, the detonation spectrum is split by bifurcated optical fiber and filters, then, received by the photoelectric-detectors and convert to electrical signal. Finally, the temperature evolution process is derived through regression algorithm. Besides, concentrations of certain components can also be revealed through real-time detection of corresponding spectral lines. The spectral response coefficients and the whole system are calibrated with a standard tungsten lamp and a standard radiation source respectively. With this system, experiments are carried out, and, the variations of denotation temperature and concentrations of some key components are recorded.
In this paper, an analytic model of beam profile error evaluation for detector array method is advanced. The model based on Gaussian beam distribution considering spatial sampling frequency, the non-uniformity of detectors and the high frequency components of integral laser spot. Finally, the analytic error model of laser beam profile evaluation was obtained by derivation and calculation. The model is adapted to calculate the integral energy, the beam centroid, and beam size of Gaussian approximation beam and can be extended to monotonous distribution beam.
Power in the Bucket (PIB) is a key index to describe the quality of Laser. Actually it is hard to precisely measure it. In this work, the numerical simulation on ideal Gauss beam and flat beam with different apertures were carried out. The results show that the problem can be overcomed by guaranteeing the transmission of the aperture. And 97% is a suggested value according to the analysis.