1.Product Descriptions:
| Characteristics: | 808nm Bandpass Filter |
| Type: | Interference filter |
| Central Wavelength (CWL): | 808+-5nm |
| Full Width at Half Maximum(FWHM): | 20/30/40/60/65nm |
| Peak Transmittance(%) : | >92% |
| Cut-off depth: | OD2-OD3 |
| Shape: | Square, Round, Irregular Shape |
| Color: | Black |
| 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: 380-2500nm, stock for 10nm intervals. ** *** Thickness available: |
2.Measured Spectral Graph – 808nm Bandpass filter:
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| Picture 1: BP808-20nm Spectral Graph measurement |
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| Picture 2: BP808-30nm Spectral Graph measurement |
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| Picture 3: BP808-40nm Spectral Graph measurement |
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| Picture 4: BP808-60nm Spectral Graph measurement |
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| Picture 5: BP808-65nm Spectral Graph measurement |
3.What is typical application for 808nm bandpass filters?
An 808nm bandpass filter is an optical component specifically designed to transmit near-infrared light centered around the 808nm wavelength band while blocking light at all other wavelengths. 808nm bandpass filters isolate and purify 808nm diode laser beams in laser systems, enable fluorescence excitation and signal detection in biomedical instrumentation, support NIR spectroscopy, environmental monitoring, LiDAR, and infrared surveillance in sensing applications, and ensure signal integrity in space optical communication systems.
4.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:
820nm Bandpass Filter, 820nm CWL,40/45/60/70nm FWHM, Support Customized
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 & Short Filters, Notch Filters, ND filters, Star filters and Optical sapphire block. Other typical Bandpass filters in stock from Liyuan Optoelectronics include BP810 BP820 BP830 BP840 BP850 BP860 BP870 BP880 BP890 BP…etc.
