1.Design with HI-POWER UV LED and do the inspection through UV light.
2.Inspection of scratches and dark surfaces through UV light.
3.The standard wavelength are 365nm, 395nm, 405nm, 375nm and 385nm.
4.The light can be customized. 

Major Applications:
1.Photography use in the difference in the scattering rate
2.Use with a CCD camera supporting the ultraviolet ray range
3.Detection of dirt on glass substrates and dust on CCD devices
4.Scan the image of the QR Code
I agree