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A new measurement method for contrast sensitivity and color difference threshold characteristics of human eyes

Contrast sensitivity and color difference threshold are two important parameters of human visual characteristics, which are directly related to people's life and work. Based on optical modulation technology, a new method to measure visual threshold characteristics of human eyes is proposed. By using specially made modulators and integrating sphere system, a measurement device is developed which can realize multi-parameter measurement with psychophysical method, such as contrast sensitivity and color difference threshold. By the metrological control, the measurement values can be traceable to the existing luminance and color standards. Experiments show that the device can generate required test targets with different brightness, color, spatial frequency and contrast, and realize the visual threshold measurement well. Moreover, with the advantage of adjustable test target, simulation of different scenes and large measurement range, the device can meet needs of personalized measurements in many fields.