1.Product Descriptions:
| Characteristics: | 532nm Narrow Bandpass Filter |
| Type: | Interference type |
| Central Wavelength (CWL): | 532nm |
| Full Width at Half Maximum(FWHM): | 10nm |
| Peak Transmittance(%) : | >95% |
| Optical Density (OD): | OD4 |
| Shape: | Round, square or customized |
| Color: | Green |
| Surface Quality: | 60/40 |
| Dimension(mm): | Customized ** |
| Thickness(mm): | 0.21-3mm |
| Substrate: | Optical Glass |
Remark: *Customized capability: 200-2000nm, stock for 10nm intervals. **Common for 86x86mm, 80x80mm, max. 300x300mm. | |
2.Measured Spectral Graph – 532nm Bandpass filter:
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| Picture 1: NBP532-10nm Spectral Graph measurement |
What is typical application for 532nm Narrow Bandpass Filters?
A 532nm narrow bandpass filter is an optical component designed to selectively transmit light centered at the 532nm wavelength while blocking light at all other wavelengths. A 532nm narrow bandpass filter is widely used in Raman spectroscopy and laser-based instrumentation for precise laser line cleanup, ensuring excitation light purity. Besides, it is also essential in fluorescence microscopy and flow cytometry to selectively transmit green excitation light for fluorophores, and in LIDAR systems for atmospheric sensing and 3D mapping by suppressing solar background radiation.
What are key parameters when choose for a suitable Narrow Bandpass Filter?
When selecting a Narrow Bandpass Filter, normally the following factors need to be taken into consideration：
- Central Wavelength (CWL)：CWL is one of key parameter to designate first, it refer to the central wavelength at stable high transmission rate passband.
- Peak or Average Transmittance: typically ≥90%, Higher transmittance might need Anti-reflective(AR) coating.
- Full width at half maximum (FWHM): FWHM refer to the interval between the two wavelength points where the transmittance rate reaches 50%.
- Blocking rate: usually in terms of optical density(OD), OD2-OD3 for standard and higher will be OD4-OD6 per requirement.
- Angle of Incidence (AOI): AOI need to be considered as Interference Filter is angle sensitive, 0° AOI by default, other AOI e.g. 30/45° need to be specified.
- Physical and environmental requirement: Substrate type, dimensions and thickness, surface quality, and environmental durability.
Shenzhen Hengda Liyuan Optoelectronics introduced advanced optical vacuum technology that apply depositing nano-materials 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. Besides, Liyuan optoelectronics have been focus on optical coating for more than 17 years ,and the company offer one-stop optical filters solution including Narrow Bandpass Filters, IR cut-off Filters, Longpass Filters, Shortpass Filters, Notch Filters, ND filters, Star filters and Optical sapphire block.
Related products:
NBP540-10nm Narrow Bandpass Filter, 540nm CWL, 10nm FWHM Optical Filter
