Product Descriptions:
| Characteristics: | 935nm Bandpass Filter |
| Type: | Interference type |
| Central Wavelength (CWL): | 935+-5nm |
| Full Width at Half Maximum(FWHM): | 40nm |
| Peak Transmittance(%) : | >92% |
| Cut-off depth: | OD2 |
| Shape: | Round, square or customized |
| Color: | Silver |
| 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: Customized capability: 200-2000nm. | |
Spectral measurement graph
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| Picture 1: BP935-40nm Spectral measurement graph |
What is typical application for 935nm Bandpass Filters?
A 935nm bandpass filter is a specialized optical component that selectively transmits light centered at the 935nm wavelength while blocking other spectral regions.
Typically, the 935nm infrared bandpass filters find primary use in near-infrared spectroscopy, fluorescence microscopy, and flow cytometry, in these applications, they isolate the 935nm wavelength to enable precise optical analysis. Additionally,They also serve in machine vision, biomedical imaging, and laser-based systems.
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.
Related products:
940nm Bandpass Filter, 940nm CWL ,40nm FWMH, Hard Coated, 1.0mm thickness
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.
