◆Features
Bandpass filters are used to selectively specific wavelength bands of light to transmit. They have high transmittance within the transmission bands, while blocking light outside this range, and feature a relatively wide bandwidth.
Multi-layer dielectric coatings are adopted, which result in almost no light absorption, high transmittance, and high wavelength separation efficiency.
Offers reliable optical stability.
◆Common Specifications
Material | HWB850 |
Coating | 60-40；2×0.4 |
Reflectance | AR coating；Filter coating |
Angle of incidence | 0° |
◆Applications
Multi-Wavelength Laser System
Fluorescence Spectrometer
Industrial Sensor
Optical Experiment and Teaching
Optical Path Design: Incident light must be directed onto the coated surface at the specified angle.
Mechanical Mounting: Must be installed using specially designed mounts that precisely control the angle.
Optical Path Design: Incident light must be directed onto the coated surface at the specified angle.
Mechanical Mounting: Must be installed using specially designed mounts that precisely control the angle.
Material | HWB850 | Diameter | Φ5mm |
Diameter Tolerance | -0.04/0.06mm | Thickness | 1mm |
Thickness Tolerance | ±0.05mm | Coating | Filter coating |
Transmittance | T≥85%@890nm~915nm | Parallelism | 30" |
Surface Quality | 2×0.4 | Clear aperture | 3.5mm |
FWHM | 45nm±5nm | Cut-Off Region Transmittance | Tmax≤0.8%@300nm~840nm Tavg≤0.1%@970nm~1200nm |
Surface Flatness | 1λ@633nm | Center Wavelength （CWL） | About 902.5nm |
Cut-off wavelength range | 300 nm ~ 840 nm 970 nm ~ 1200 nm | OD (Cut-off Band) | OD≥2.10@300nm~840nm OD≥3.00@970nm~1200nm |
Material | HWB850 | Diameter | Φ12.7mm |
Diameter Tolerance | -0.1/0mm | Thickness | 1mm |
Coating | AR Coating | Transmittance | Tmin=60% T≤0.1%@300-1400nm&1800-2000nm |
Cut-off wavelength range | 300nm~1400nm 1800nm~2000nm | OD (Cut-off Band) | OD≥3@300-1400nm&1800-2000nm |
Surface Quality | 60/40 | Angle of incidence | 0° |
Surface Flatness | 1.5λ@633nm | Center Wavelength （CWL） | 1600±20nm |
FWHM（HWL） | 90±20nm |
Bandpass Filters
