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Help Center355nm Filter: an Ideal Optical Component for Precise UV Band Screening, Scientific Research, and Industrial Testing
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355nm Filter: an Ideal Optical Component for Precise UV Band Screening, Scientific Research, and Industrial TestingUS$ 7 - 12MOQ: 10 Units
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Color Filter FactoryNegotiableMOQ: 5 Sets
1、 Working principle
The filter is designed by stacking multiple layers of dielectric films, utilizing the principle of light interference:
Within the passband, high transmittance (>90%) is achieved in the 355nm wavelength range
Outside the passband: other bands (such as 532nm, 1064nm) achieve depth cutoff (above OD4)
This' ultraviolet highway toll station 'effect ensures that only light of the target wavelength passes smoothly, while other stray light is effectively intercepted.
2、 Main application areas
1. Laser technology
Nd: YAG laser third harmonic monitoring: 355nm is the third harmonic output of 1064nm laser, used for beam quality analysis and laser power measurement
UV laser processing: precision cutting of flexible circuit boards, semiconductor packaging, laser marking and welding
2. Research and Spectral Analysis
Raman spectroscopy: eliminate excitation light interference and detect weak Raman signals
Fluorescence imaging: laser-induced fluorescence analysis, biological fluorescence microscopy
Spectral instrument: as a pre filtering module for spectrometers and CCD cameras
3. Environmental monitoring
Haze particle detection: using 355nm ultraviolet lidar to monitor atmospheric PM2.5 and aerosol distribution
Pollution emission monitoring: detecting the transmission path of pollutants, forecasting sandstorms
4. Biomedical Sciences
Medical imaging equipment: UV-C sterilization lamp monitoring, virus fluorescence recognition system
Biochemical analysis instruments: ELISA reader, flow cytometer, DNA/RNA analysis
5. Industrial testing
Semiconductor testing: UV lithography light source screening, wafer defect detection
Machine vision: Scratch detection on the surface of high-speed conveyor belts (capable of identifying defects up to 0.03mm)
3、 Key selection points
Confirm bandwidth requirements: Narrow bandwidth of 3-10nm is usually selected for scientific research applications, and slightly wider bandwidth is optional for industrial testing
Check OD value: Ensure that the out of band suppression capability meets the signal-to-noise ratio requirements (recommended OD4 or above)
Attention to damage threshold: High power laser applications require confirmation that the filter can withstand laser energy density
Choose coating process: Prioritize ion Assisted Deposition (IAD) hard film technology for a denser and longer lifespan film layer
Considering the incidence angle: The standard design is 0 ° incidence, and the angle compensation design needs to be confirmed for oblique use
4、 Famous Brands and Suppliers
International brands: Thorlabs, Edmund Optics, Ophir (Israel), ACTON (USA)
Domestic manufacturers: Jiete Optoelectronics, Bodun Optoelectronics, Nahong Optoelectronics, Yizhao Optoelectronics, Ruiyan Technology, etc
5、 Precautions for use
⚠️ Safety protection: Although the filter filters ultraviolet rays, it is still necessary to wear UV protective goggles during operation to avoid direct eye contact with the laser
⚠️ Regular maintenance: Check for surface scratches or stains, maintain cleanliness to ensure optimal optical performance
⚠️ Thermal management: Pay attention to heat dissipation during high-power applications to avoid thermal damage to the film layer
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