1.Product Descriptions:
| Characteristics: | 810nm Bandpass Filter |
| Type: | Interference type |
| Central Wavelength (CWL): | 810+-5nm |
| Full Width at Half Maximum(FWHM): | 45nm |
| Peak Transmittance(%) : | >95% |
| 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: Spectral range:350-1100nm | |
2.Measured Spectral Graph – 810nm Bandpass filter:
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| Picture 1: BP810-45nm+AR Spectral Graph measurement |
3.What is typical application for 810nm bandpass filters?
An 810nm bandpass filter is an optical device that allows only a very narrow band of light centered at 810 nanometers to pass through, while effectively blocking all other wavelengths, including the entire visible spectrum.
The 810nm Bandpass Filter finds broad applications across multiple fields:
- Medical Diagnostics and Analysis: Clinical chemistry analyzers, colorimetry, and fluorescence immunoassay instruments widely employ these filters to isolate signals at specific wavelengths.
- Chemical Analysis and Spectroradiometry: Spectrophotometers, colorimeters, and other analytical devices rely on these filters for precise chemical composition analysis.
- Laser Line Separation: These filters effectively isolate and purify the spectral lines of specific near-infrared lasers such as the Nd:YAG laser.
- Machine Vision: Industrial inspection and factory automation systems use these filters to enhance the contrast between target features and backgrounds through specific spectral responses.
- Fluorescence Microscopy Imaging: These filters work in conjunction with specific fluorescent dyes for imaging and analysis of biological samples.
- LIDAR and Sensing: LIDAR, remote sensing, and environmental monitoring systems also apply these filters.
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:
855nm Bandpass Filter, 855nm CWL, 25nm FWHM, Support Customized
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.
Remark: The appearance color of the optical filter is usually determined by the spectral parameters, the interference type filter varies at different angles, and the pictures in this link may have been taken from different angles, so the actual color should be based on the final spectral parameters required！
