1.Product Descriptions:
| Characteristics: | 410nm Bandpass Filter |
| Type: | Interference Filter |
| Central Wavelength (CWL): | 410+-5nm or specified* |
| Full Width at Half Maximum(FWHM): | 40nm |
| Peak Transmittance(%) : | >80% or specified |
| Cut-off depth: | OD2-OD3 or specified |
| Shape: | Square, Round or customized |
| Color: | Purple |
| Surface Quality: | 60/40 scratch-dig or specified |
| Dimension(mm): | Customized** |
| Thickness(mm): | Customized*** |
| Substrate: | Ultra-clear glass, Quartz Glass(Fused Silica) or other specified. |
| Remark: Spectral range:350-1100nm *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. | |
2.Measured Spectral Graph – 410nm Bandpass filter:
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| Picture 1: BP410-40nm Spectral Graph measurement |
3.What is BP410-40nm Bandpass Filter？
A BP410-40nm Bandpass Filter is a violet and near-ultraviolet bandpass optical filter. It selectively transmits light within the spectrum of 390-430nm violet light, and strongly blocks deep ultraviolet, other visible light and infrared stray light outside the designated passband.
4.What is typical application for 410nm Bandpass Filter?
Typical application for 410nm Bandpass Filters are very broad, including biochemical fluorescence detection & fluorescence microscopy, ultraviolet spectrum analysis instruments, industrial UV defect inspection and UV light sensing, environmental optical monitoring and medical diagnostic equipment, 400–420 nm near-UV laser auxiliary filtering systems.
5.What are key parameters when choose for a suitable 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 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 Filters, IR cut-off Filters, Longpass Filters, Shortpass Filters, Notch Filters, ND filters, Star filters and Optical sapphire block.
