Product Descriptions:
| Characteristics: | 490nm Narrow Bandpass Filters |
| Central Wavelength (CWL): | 490nm or specified* |
| Full Width at Half Maximum（FWHM): | 20nm or specified |
| Peak Transmittance(%) : | >90% or specified |
| Dimension(mm): | Diameter 8.0mm or specified** |
| Thickness(mm): | 1.0mm or specified*** |
| Substrate: | Ultra-clear glass,K9,BK7,B270,D2637T, Quartz Glass(Fused Silica) or other specified. |
| Remark：Spectral range:380-1100nm *Customized capability: 380-2500nm, stock for 10nm intervals. **Common for 86x86mm, 80x80mm, other can customized, max. 300x300mm *** Thickness available: 0.21、0.3、0.55、0.7、1.0、1.1、1.5、1.8、2.0、3.0mm…etc | |
Measured Spectral Graph – 490nm narrow bandpass filters:
 |
| Picture 1: BP490nm Spectral Graph |
What is typical application for 490nm narrow bandpass filter?
Typical application for 490nm narrow bandpass filter is very broad, include fluorescence microscopy and flow cytometry, oceanography and water quality monitoring, environmental and remote sensing, medical diagnostics and biomedical research, machine vision and colorimetry, astronomy…etc. Other typical Bandpass filters in stock from Liyuan Optoelectronics include BP410 BP420 BP430 BP440 BP450 BP460 BP470 BP480 BP490 …etc.
What is key parameter when choose for right Narrow bandpass filters?
When selecting a Narrow bandpass filters:
- Center WaveLength (CWL) will be one of key parameter to be designated, with a tolerance of generally +/-2nm or +/5nm which depend on the user inquiry.
- Bandwidth (FWHM) normally range from 5-15nm, need to balances signal transmission with ambient light rejection. The FWHM of ultra narrow bandpass might be lower than 5nm.
- Peak and Average Transmittance ,e.g 90%,95%…etc. higher transmittance might need Anti-reflective(AR) coating.
- Subtrate: material will determin durability, thermal stability, and cost.
Shenzhen Hengda Liyuan Optoelectronics introduced advanced optical technology that apply depositing nanomaterials through ion-assisted evaporation onto a multilayer hard film in a high vacuum environment which coating layer is firm and has good tightness, and small bandwidth drift. Liyuan optoelectronics have been focus on optical coating for more than 17 years and offer one-stop optical filters solution including Narrow Bandpass Fitlers, IR cut-off Filters, Longpass & Short Filters,Notch Filters, ND filters, Star filters and Optical sapphire block.
