Product Descriptions:
| Characteristics: | 535nm Narrow Bandpass Filter |
| Type: | Interference type filter |
| Central Wavelength (CWL): | 535+-5nm |
| Full Width at Half Maximum(FWHM): | 20nm |
| Peak Transmittance(%) : | >85% |
| Cut-off depth: | OD2 |
| Shape: | Round or customized. |
| Color: | Green |
| Surface Quality: | 60/40 scratch-dig |
| Dimension(mm): | Common for 86x86mm, 80x80mm, other can customized, max. 300x300mm |
| Thickness(mm): | 0.21、0.3、0.55、0.7、1.0、1.1、1.5、1.8、2.0、3.0mm, etc. |
| Substrate: | Ultra-clear glass,K9,BK7,B270,D2637T, Quartz Glass(Fused Silica) or other specified. |
| Remark: Spectral range:350-1100nm | |
Measured Spectral Graph
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| Picture 1: BP535-20nm Spectral Graph measurement |
What is typical application for 535nm bandpass filters?
A 535nm bandpass filter is an optical component that selectively allows light centered around the 535nm to pass through while blocking most other wavelengths. Typical application for 535nm bandpass filters is very broad, include Fluorescence Imaging & Microscopy, Gene Sequencing, Optical Sensing & Spectroscopy, Machine Vision, Laser Systems & Optical Communications…etc.
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.
