The Spectral Response Characteristics Of The Intermediate Visual Status Of The Human Eye Visual Function

This research is to find out the effects of light level, visual angle and eccentricity on the spectral sensitivity of human eyes at mesopic region; to validate the possibility of working out the spectral luminous efficacy curves based on visual performance at mesopic light levels; to find the connection between the results of performance-based method and brightness-matching method.The topic of this research, visual performance at mesopic light levels, is the main task of CIE TC 1-58. With the experiments done in this research, effects on visual performance at mesopic region were described, which belongs to the necessary basic research work for developing the new mesopic system. The creative point of this dissertation consists firstly in that monochromatic stimuli instead of combined spectral power distribution were used as visual object, and spectral luminous efficacy curves were drawn from the performance-based method; Comparison between performance-based method and brightness-matching method was then done and therefore connection between these two methods was developed; One more creative point is that the analysis based on the theory of neurophysiology and psychophysics leads to the conclusion that contribution of the colour channel during visual information processing is reflected from performance-based method, which should be considered when CIE develops the new mesopic photometry system.In the experiments, detection rate and reaction time were measured to evaluate the visual performance of human eyes at three mesopic light levels(0.01, 0.1 and 1 cd·m^-2) with targets of two visual angles (10' and 2°) at two observing eccentricities (0°, 10°). There generated more than 30,000 single measured data and analysis with statistical and computer methods were done. The results indicate the effect of light level, visual angle and eccentricity on detection rate and reaction time at mesopic region; shows series of spectral luminous efficacy drawn out from the experimental results since monochromatic stimulus was used; proves that the results from performance-based method are in essence compatible with those from bright-matching method, since both of them are in accordance...