A bandpass 380nm filter is an optical component designed for selective transmission of light at a wavelength of 380nm. Its primary function is to allow specific wavelength bands to pass while blocking interfering light of other wavelengths. Key parameters include center wavelength, bandwidth, blocking range, and substrate material, as detailed below:

• Center Wavelength and Bandwidth: Centered at 380nm, common bandwidth specifications are 20nm, allowing light in the 370-390nm band to pass. There are also wideband models covering 380nm-460nm, which simultaneously transmit ultraviolet to blue light regions.
• Blocking Performance: Deep ultraviolet, visible, and near-infrared light outside the passband are effectively blocked, ensuring high-purity transmission of the target wavelength band.
• Substrate Material: Typically coated on JGS1 quartz material, offering excellent ultraviolet transmittance and chemical stability. Some products may use other glass substrates, which can be customized according to requirements.
• Application Areas:
• Ultraviolet Detection and Analysis: Such as fluorescence analysis and UV spectrometers, utilizing 380nm narrowband filtering to exclude visible light interference.
• Laser Technology: Used with ultraviolet lasers to achieve beam shaping and purification at specific wavelengths.
• Industrial Sensing: Employed in ultraviolet sensors for wavelength selection, enhancing detection accuracy.
• Scientific Research Experiments: Basic physics or chemistry experiments involving optical filtering and spectral separation.