Doesn’t the uvled curing lamp emit ultraviolet light? Why can I see purple or blue light?read count [600] release time：2021-10-13 11:21:00

Many people are curious, isn't ultraviolet light invisible light? how uvled Can I still see purple or blue light when the curing lamp is operating? Is there something wrong with the equipment? Here I’m going to talk to you about visible light and invisible light.

Visible light that can be perceived by ordinary human eyes has a wavelength of 780~400nm Between them, what exceeds the range is invisible light. Invisible light generally does not cause people's visual reaction, that is, it cannot be seen. So it stands to reason uvled The curing lamp emits ultraviolet light, which should be invisible light, so why are we using uvled Can you see visible purple or blue light when you turn on the light?

UVLED surface light source Display diagram

Mainly because ultraviolet light is actually UVLED The light in the ultraviolet spectrum range emitted by the excited recombination of electrons and holes emits ultraviolet light as well as visible light in adjacent bands. Therefore, in addition to ultraviolet light, visible violet and blue light can also be seen, so UVLED Curing lamps can see purple or blue light. Moreover, the light emitted can remind people that they are under the exposure of ultraviolet light. If there is no special need, do not stay for a long time, because UVLED The ultraviolet light emitted belongs to UVA band, that is, in 320~420nm , due to its longer wavelength, it can penetrate the surface of the skin and cause harm to the human body.