Application of 490nm sleep-aid color powder in sleep-aid glasses

The visible light received by the human eye, which ranges from 460 to 500nm, serves as a regulator of human circadian rhythm response. Exposure to LED screens at night, particularly their blue light (460nm-500nm), significantly reduces the level of melatonin during the night and suppresses sleepiness. For instance, exposure to "Circadian Light" circadian rhythm blue light (490nm) at night can positively impact human health. Reports indicate that up to 4 hours of blue light exposure before sleep can affect the level of melatonin during the night and subjective sleep quality.

Removing circadian exposure at night can produce melatonin (sleep), vasoactive intestinal peptide (lowers blood pressure), and growth hormone (metabolism and repair). These changes alter sleep/wake cycles, blood pressure, metabolism, reproduction, and immune response. Additionally, reducing the blue component of artificial light at night can protect against the disruptions of shift work.

A simple solution to effectively block and reduce the blue part of the light spectrum before going to bed is to wear glasses that block specific wavelengths of blue light. Wearing them before bed can effectively weaken the melatonin suppression induced by LEDs, so your brain will not receive signals that should keep you awake.

During the day, we need to absorb appropriate amounts of blue light (490nm), while at night, we should avoid exposure to blue light emitted by lamps, televisions, computer monitors, and other electronic devices. This can effectively improve the circadian rhythm of sleep. It has been found that consuming foods containing milk at night in a cool room temperature can enhance the production of melatonin (serotonin helps regulate anxiety) and physical activity during the day (which increases the production of melatonin at night), thereby improving sleep quality. Adopting these methods can address mild sleep disorders.

ScanName：PCUV490 Sleep-aid lenses are coated with a green film 65*3B*1.6

European Standard:：EN 1836:2005 A1(2007).

Results

Luminous Transmittance (Tv)     80.016%

Mean UV Transmittance     

Solar UVA (315-380 nm)    0.109%

Solar UVB (280-315 nm)    0.001%

Spectral Transmittance (315-350 nm)    0.084%

Total Solar UV (280-380 nm)    0.071%

These lenses provide adequate protection from UV radiation from the sur

These lenses transmit 75.253%of blue light (380-500 nm).

Spectral Transmittance (500-650 nm)   PASS (>16.003%)

Recognition of Signal Lights

Red Signal   0.991 PASS (>= 0.8)

Yellow Signal   1.002 PASS (>=0.8)

Blue Signal   0.971 PASS (>= 0.4)

Green Signal    1.005 PASS (>=0.6)

Table of Wavelength(nm) vs Sample Transmission Date