UV aging belongs rau hnub ci kev laus. UV yog lub npe luv ntawm Ultraviolet (ultraviolet), uas feem ntau yog siv los ntsuas qhov kev laus ntawm cov khoom hauv qab ultraviolet rays. Hnub ci kev laus yog qhov tseem ceeb ntawm kev laus puas tsuaj rau cov khoom siv sab nraum zoov. Rau cov ntaub ntawv siv sab hauv tsev, nws kuj tseem yuav raug rau qee qhov kev laus los ntawm lub hnub ci hluav taws xob lossis ultraviolet rays hauv cov khoom siv hluav taws xob (xws li cov teeb ci ultraviolet, ultraviolet bands hauv cov teeb fluorescent, thiab lwm yam).
Solar radiation is mainly concentrated in the visible light part (0.4-0.76 μm), and the infrared rays with wavelengths greater than visible light (>0.76 μm) thiab ultraviolet rays (<0.4 μm) with wavelengths smaller than visible light are less. Among the total radiant energy, wavelengths between 0.15 and 4 μm account for more than 99%, and they are mainly distributed in the visible light region and red and ultraviolet regions. The visible light region accounts for about 50% of the total solar radiation energy, and the infrared region accounts for about 43%. The solar radiation in the ultraviolet region is very little, accounting for only about 7% of the total.
Lub teeb ultraviolet yog ib lub ntsiab lus dav dav rau cov hluav taws xob nrog lub wavelengths ntawm {{0}}.01 txog 0.40 microns hauv electromagnetic spectrum, uas tsis tuaj yeem ua rau tib neeg lub zeem muag. Lub teeb ultraviolet muab faib ua A rays, B rays thiab C rays (hu ua UVA, UVB thiab UVC), thiab cov wavelength ranges yog 400-315nm, 315-280nm, 280-190nm feem. .
Raws li ASTM G154, UV (ultraviolet) tsis tuaj yeem simulate tag nrho-spectrum hnub ci. Nws lub hauv paus ntsiab lus yog tias rau cov khoom siv ruaj khov tawm sab nraum zoov, qhov luv-band wavelength ntawm ultraviolet rays ntawm 300 ~ 400nm yog qhov tseem ceeb tshaj plaws ua rau kev laus puas tsuaj. Raws li tuaj yeem pom los ntawm daim duab hauv qab no, nyob rau thaj tsam luv-yoj ntawm lub teeb ultraviolet, uas yog, los ntawm 365nm mus rau qhov qis tshaj plaws ntawm lub hnub ci, UV fluorescent teeb tuaj yeem simulate hnub ci zoo.