The color limit of sunglasses

To simulate the observation of yellow and green traffic signals through the lens and the observation of average daylight through the lens, the standard stipulates that the corresponding color coordinates should be located in the corresponding region of the chrominance diagram (Figure 1). If the measured color coordinate value exceeds the specified color limit area, it will lead to confusion of various traffic signals, which is one of the hidden dangers of traffic accidents.
Traffic signal transmittance
Observe red, yellow and green traffic signals through the lens, and the corresponding transmission ratio of traffic signals specified in the standard is: ≥8% for the red signal; ≥6% for yellow and green signals; If the transmission ratio of various traffic signals is too low, it reduces the ability to recognize the signal, and is also one of the hidden dangers of traffic accidents.