用自制三变仪测量了六种波长的单色光栅和两个年龄组的人眼对比阈。结果表明,在象场亮度为5cd/m~2时,青年人的不同色光对比阈曲线比较接近,其中黄色光栅对比阈最低,蓝色其次。两个年龄组的白光对比阈相比较,除了象场亮度为10cd/m~2时低频段阈值相近外,在两个亮度水平(10,100cd/m~2)下,青年组的白光对比阈普遍低于中年组。 The self-made tri-gauges were used to measure the contrast threshold of six-wavelength monochromatic grating and two age groups. The results show that when the image field brightness is 5cd / m ~ 2, the contrast threshold curves of young people are relatively close, among which the contrast threshold of yellow grating is the lowest and the blue is the second. Compared with the threshold contrast of white light in two age groups, except for the low-frequency threshold at 10cd / m ~ 2, the white-light contrast threshold of the youth group is common at the two brightness levels (10,100cd / m ~ 2) Lower than middle age group.