Skip to content 
1064/20nm Interference Optical Filter
1064/20nm Interference Optical Filter is a narrow bandpass filter design optimize for 1064nm wavelength lasers. Coligh manufactures EUV to 30000nm optical filters.
- Center Wavelength 1064nm
- FWHM 20nm
- Tp>90%
- OD4 deep blocking depth
Products Categories
Get A Free Quote
1064/20nm Interference Narrow Bandpass Optical Filter Description
The 1064/20nm interference optical filter is a bandpass filter designed to transmit light centered at 1064nm with a 20nm bandwidth.
- The central wavelength is 1064+/-2nm, which is suitable for Nd:YAG lasers, fiber lasers and sensor detection needs.
- Half bandwidth is 20+/-2nm, passband is within 1054-1074nm, transmittance is greater than 90% within the passband, and the light flux is significantly higher than the 10nm narrowband design, which is suitable for high-speed detection or weak signal scenarios.
- The cut-off band is from ultraviolet to long-wave near-infrared band, and the cut-off depth is OD4 from 200-1700nm
1064/20nm Interference Optical Filter Technical Datasheet
| arameter | Specification |
| Center Wavelength (CWL) | 1064 nm ± 2 nm |
| FWHM | 20 nm ± 2nm |
| Peak Transmission | ≥ 90% |
| Blocking Range | 200 – 1700nm |
| Optical Density (OD) | OD4 |
| Angle of Incidence (AOI) | 0° |
| Clear Aperture | >90% of the diameter |
| Substrate Material | UV Fused Silica, K9,sapphire, Other optical glass |
| Size | Ø12.7mm, Ø25.4mm,Ø50.8mmor customizable |
| Environmental Durability | Compliant with MIL-STD-810G |
| Other available wavelength | 1064/10nm, 1064/20nm |
| Custom Option | EUV to 30,000nm |
| Filter Type | Multilayer Interference Bandpass Filter |
| Coating Technology | Ion-Assisted Deposition (IAD), Hard coated |
| Surface Quality | 80-50, 60-40, 40-20 (per MIL-PRF-13830B |
1064/20nm Interference Optical Filter Applications
- Industrial sensors
In industrial sensors, small defects on metal/plastic surfaces are difficult to identify under complex lighting. In addition, the wavelength of the laser light source shifts by ±10nm due to temperature drift, and the narrowband filter is prone to failure. The 1064/20nm filter can cover the temperature drift range of the laser to ensure signal stability. - LiDAR
In lidar sensors, near-infrared noise in sunlight causes misjudgment of obstacles. In addition, the vehicle ambient temperature changes drastically (-40°C to 85°C), and the filter performance fluctuates. The 1064/20nm filter can suppress sunlight noise and only receive valid echoes. - Medical sensors
In medical sensors, scattered light from the surface of the skin interferes with the signal of deep tissues, resulting in large detection errors. Low-power light sources have weak signals, and traditional filters have insufficient light flux. This filter can eliminate ambient light interference and accurately extract 1064nm characteristic signals. - Water quality sensors
The turbidity or gas absorption signals of water bodies are weak and easily masked by background noise. Strong outdoor light (such as ultraviolet light and visible light) interferes with sensor readings. The 1064/20nm narrowband filter can detect water turbidity or gas concentration. The slightly wider bandwidth is suitable for complex component detection and enhances signal stability.
