振动和照明光波长特性对判读仪表所需照明水平的影响

Effect of vibration and illuminating light wavelength on the level of illumination needed for dial reading

实验在暗室内进行。16名正常男性青年作为被试者，取屈腿半卧位。与仪表视距为70cm，测定了胸背轴人全身振动，仪表振动，人和仪表同时振动以及不同波长下判读仪表所需最低照明水平。结果表明，不同振动频率在等现力振动条件下仪表判读所需的照度无显著性差异，当视力因振动的增强而下降时，仪表判读所需的照度提高。人体与仪表同时振动及人体单独振动时所需的照度显著高于仪表单独振动时。振动条件下照明光的波长特性对仪表判该影响很大。5种照明光接仪表判谈所需照度由高至低排序依次为：起始被长620um的红光，白光，峰值波长640、620和600um的红光。

The experiment was carried out in a dark room. sixteen normal youngmen served as subjects. semi-supine position were taken. Visual distance between the subject and dial was 70 cm. The lowest illuminating level for dial reading during whole body vibration in chest-back direction,vibration ofthe dial,vibration of both man and dial as well as in light of various wavelength were measured. The resuIts show that: (1)the difference among the illumination levels needed for dial reading under the condition of different vibration frequencies,in which the visual acuity was maintained equally, were not significant. As the visual acuity was decreased with the increase of vibration intensity, the illuminationneeded for dial reading was increased; (2)illumination level for dial reading during vibration of both manand dial,as well as vibration of man only was higher than that during vibration of dial only; (3)the illumination needed for dial reading was significantly influenced by wavelength characteristic of illuminatinglight,the order of five illuminating lights ranged from high to low according to their values of illumination needed for dial reading was as follows: red light with initial wavelength 620 nm,white light, redlight with peak wavelength 640 nm, red light with peak wavelength 620 nm, and red light with peakwavelength 600 nm.