Cut-off Optical Filter Glass
Features: It can cut off the spectrum at a specific wavelength, allowing only light above or below a certain wavelength to pass through, and can effectively cut off unnecessary wavelengths, including ultraviolet light other than UVB and visible light.
Common brands
ZWB series: such as ZWB1 UV cut-off glass, which can transmit 220-400 nanometers of ultraviolet light and absorb 400-700 nanometers of visible light. It can be used to filter out the visible light component of the light emitted by UVB LEDs, so that the output light is mainly UVB.
Selective Absorption Optical Filter Glass
Features: selectively absorbs a certain wavelength of spectrum while allowing other wavelengths to pass through. It can absorb UVB light of a specific wavelength or other light other than UVB according to needs.
Common brands
QB series: such as QB5 glass, which has the characteristics of absorbing ultraviolet rays, can be used to protect and filter unnecessary ultraviolet components in UVB LEDs, and reduce the output of stray light and harmful ultraviolet rays.
Quartz Glass
Features: It has good UV transmittance, allows UVB light to pass through efficiently, and has high chemical and thermal stability, and can withstand a certain amount of heat generated when UVB LEDs are working.
Application scenarios: It is often used in places with high requirements for UV transmittance and demanding glass performance, such as UVB ultraviolet curing, UVB phototherapy and other fields.
