The 355nm narrow-band filter is a high-precision optical component for the ultraviolet band, primarily designed to precisely isolate light at the 355nm wavelength from a composite spectrum. Its core advantages lie in its high wavelength accuracy and excellent spectral selectivity. According to technical specifications, the filter's center wavelength is controlled at 355±5nm, with a full width at half maximum (bandwidth) of 10±2nm, ensuring that only an extremely narrow range of target spectrum is transmitted while effectively blocking other wavelength bands (e.g., out-of-band transmittance as low as T0.02% in the 200-1000nm range). The substrate is made of float glass, offering good optical uniformity and mechanical strength. Customizable dimensions (e.g., standard Φ12.5×6mm, supporting 0° angle of incidence) make it suitable for various precision optical equipment interfaces.

Application Scenarios of 355nm Narrow-Band Filters

1. Medical and Biochemical Detection

In fluorescence analysis instruments and biochemical equipment, the 355nm filter can capture ultraviolet fluorescence characteristic signals of biological molecules (such as proteins and nucleic acids), enhancing detection sensitivity and data accuracy. For example, in pathogen detection or drug component analysis, its high blocking characteristics effectively eliminate background light interference, ensuring the reliability of experimental results.

2. Industrial and Spectral Equipment

• Laser Systems: Used as a laser narrow-band bandpass filter for beam purification in 355nm ultraviolet lasers, reducing the impact of stray light on processing precision (e.g., microelectronics photolithography, material surface modification).
• Environmental Monitoring: Paired with ultraviolet spectrometers, it can be used for qualitative and quantitative analysis of specific chemical substances in atmospheric pollutants (e.g., VOCs) or water quality, leveraging its high transmission efficiency to detect trace substances.