Principle Study And Technique Application Of Radiation Spectrum Identificaition

The most convenient and effective medium for human cognizing the world is radiation. The main characteristics of radiation are intensity and spectrum distribution. Based on the varieties of radiation intensity or spectral distribution, the effective identification of circumjacent object could be done.Firstly, started with the mathematical modeling of radiation transfering, the mathematical expression describing the relation between the grey scale (intensity) in the image plane of photoelectric imaging device and the radiation spectrum intensity is established. Based on the mathematical expression, the system of radiation identification is classed as unitary identification system (the number of sensing function is one) and multiple identification system (the number of sensing function is two or three), and the critical factor of identifying radiation spectrum is determined to be the response band, shape and number of the photosensor spectrum response curve.Secondly, the identification method of unitary identification system, band dividing, is studied and verified in theory and experiment, respectively. As the unitary identification system only detects the intensity quality, the spectrum can not be identified based on this information, in general. However, if the spectrum distribution of the objective in the field is different, and its difference mainly reflected in a fix band with different monotone, then, the goal of identifying the object could be done by changing photosenser response band and enhancing the contrast of object and background.For multiple identification system (the number of spectrum response curve is two or three), the monochromatic radiation and the linear continuum radiation could be effectively identified by designing the shape of spectrum response curve and making the normalize signal intensity characterize the spectrum information. After analyzing the spectrum response curve of eyes cone cells, it is found to have the typical characters of the ternary identification system. Therefore, it will also be able to identify the monochromatic radiation and the linear continuum radiation. The calculated results also confirmed that. Based on these, the essential of colors is pointed out to be the radiation spectrum identification coordinates in biological forms.Thirdly, the identification of radiation spectrum provides a theoretical basis for colourometry. CIE1931 RGB spectral tristimulus curve is an important experimental curve in colourometry, the research discovers that the spectral tristimulus curve could be derived from the spectrum response curve of eyes cone cells and the negative part of the spectral tristimulus curve could also be explained by establishing the mathematical relation between the spectrum response curve of eyes cone cells and the spectral tristimulus curve.Finally, based on the radiation spectrum identification theory and the cell differentiation theory of biology, a color vision differentiation hypothesis and the colour gamut evolution diagram are presented, and the phenomenon of color-blind could be quantitative explanted. Those provide the theory basis for the quantitative measurement of color vision.