Capilla P, Aguilar M
Departamento Interuniversitario de Optica, Facultad de Física, Universitat de València, Spain.
Ophthalmic Physiol Opt. 1993 Apr;13(2):183-5. doi: 10.1111/j.1475-1313.1993.tb00450.x.
Critical fusion frequencies have been evaluated in heterochromatic red-green flicker as a function of red-green luminous modulation defined by mL = (R-G)/(R+G)%, at five different mean luminance levels, two test sizes (2 degrees and 5 degrees) and square wave stimuli. The extreme values mL = +/- 100 correspond to ordinary light-dark flicker (red or green); mL = 0 corresponds to pure chromatic flicker, and any other values correspond to simultaneous luminous and chromatic flicker. To implement the stimuli we have developed a new stimuli generator (AVICO, colour vision analyser) using bicolour LEDs as the light source and electronic control of the luminances and frequencies. The results for any luminance level and both test sizes show a minimum critical fusion frequency in the case of pure chromatic flicker (photometric match condition) and a critical fusion frequency which is slightly higher in the green extreme (mL = -100) than in the red (mL = +100). The shape of the variation between the minimum and the extremes is consistent with the results recently reported by Swanson and the theoretical models for the luminance channel response to heterochromatic flicker.
在五种不同的平均亮度水平、两种测试尺寸（2度和5度）以及方波刺激条件下，已根据由mL = (R - G)/(R + G)%定义的红 - 绿发光调制，对异色红 - 绿闪烁中的临界融合频率进行了评估。极端值mL = +/- 100对应于普通的明暗闪烁（红色或绿色）；mL = 0对应于纯颜色闪烁，而任何其他值对应于同时的发光和颜色闪烁。为了实现这些刺激，我们开发了一种新的刺激发生器（AVICO，色觉分析仪），使用双色发光二极管作为光源，并对亮度和频率进行电子控制。对于任何亮度水平和两种测试尺寸的结果表明，在纯颜色闪烁（光度匹配条件）的情况下临界融合频率最低，并且在绿色极端（mL = -100）时的临界融合频率略高于红色（mL = +100）时的临界融合频率。最小值与极端值之间变化的形状与Swanson最近报道的结果以及亮度通道对异色闪烁响应的理论模型一致。
