EFFECT OF COLOR TEMPERATURE ON APPARENT BRIGHTNESS
EFFECT OF COLOR TEMPERATURE ON APPARENT BRIGHTNESS
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DOI：
10.1364/josa.44.000113
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发表时间：
1954-01-01
影响因子：
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通讯作者：
HARRINGTON, RE
中科院分区：
文献类型：
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作者：
HARRINGTON, RE
相同的表面在不同的色温下照射，但在相同的亮度下，通过过滤以匹配CIE亮度函数的光电池测量，可能不会“看起来”同样明亮。两个4平方英尺的屏幕由经过过滤的投影仪照射，色温分别为5380、5620和6260 K，分束光束由色彩校正光电池监测。观测者（73）调整到与10英尺-c的中性楔形相等的亮度。对于较小的色温差异，25%的观察者没有看到亮度的差异。视亮度的平均增加呈线性，色温差异为1%/100[度]。当使用闪烁比较方法时，将两台投影仪以30cps的速度交替放在同一屏幕上，亮度增加仅为1/7，小于其标准偏差的一半。作者认为，适应对大范围和稳定状态的匹配有影响。
Identical surfaces illuminated at different color temperature but at equal brightness, as measured by photocells filtered to match CIE luminosity function, may not "look" equally bright. Two 4 ft. square screens were illuminated by projectors filtered to give color temperatures 5380, 5620 and 6260 K, a split beam being monitored by color corrected photocells. The observers (73) adjusted to equal brightness with neutral wedges at about 10 ft.-c. For the smaller difference in color temperature, 25% of observers failed to see difference in brightness. Average increase in apparent brightness was linear, 1%/100[degree] difference in color temperature. When a flicker method of comparison was used, alternating the 2 projectors onto the same screen at 30 cps, the brightness increase was only 1/7 as great, and less than half its standard deviation. Author argues that adaptation affects the match for large areas and steady state.