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| Measurement Method for Contrast Sensitivity Function of the Human Eye |
| ZHANG Ji-yan1,DONG Jin-xin2,ZHOU Tao-geng3,DAI Jun-cheng1 |
1. National Institute of Metrology, Beijing 100029, China
2. Harbin Institute of Technology, Harbin, Heilongjiang 150001, China
3. Beijing Institute of Technology, Beijing 100081, China |
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Abstract According to the definition of contrast and contrast sensitivity function, a method of producing test targets for human eye contrast sensitivity measurement is proposed with integrating spheres and special light modulators. Then an automated measurement system is built and human eye contrast sensitivity function can be measured by psychophysical experiment with cross ladder method. Its spatial frequency covers 0.8, 1.5, 2.0, 3.0, 4.5, 6.0, 12.0 and 18.0 cycles per degree of visual angle. The indication error of background luminance of test targets satisfies ±5%, and contrast repeatability is 0.001 and reproducibility is 0.004, which meet requirements of human eye contrast sensitivity measurement.
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Received: 23 March 2016
Published: 29 December 2017
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| Fund:Research on measurement standard and traceability system for visual and auditory diagnostic equipments |
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Corresponding Authors:
ZHANG JiJiyan
E-mail: zhangjy@nim.ac.cn
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2018, Vol. 39 
