Product Descriptions:
| Characteristics: | 900nm Bandpass Filter |
| Type: | Interference type Filter |
| Central Wavelength (CWL): | 900+-5nm |
| Full Width at Half Maximum(FWHM): | 40/60/100/310nm |
| Average Transmittance(%) : | >92% |
| Cut-off depth: | OD2 |
| Shape: | Square, Round, Irregular Shape |
| Color: | Black |
| Surface Quality: | 60/40 scratch-dig |
| Dimension(mm): | specified** |
| Thickness(mm): | specified*** |
| Substrate: | Ultra-clear glass,K9,BK7,B270,D2637T, 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. | |
Spectral measured graph – 900nm Bandpass filter:
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| Example 1: BP900-40nm Spectral Graph measurement – 880-920nm infrared bandpass filter |
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| Example 2: BP900-60nm Spectral Graph measurement – 870-930nm infrared bandpass filter |
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| Example 3: BP900-100nm Spectral Graph measurement – 800-900nm infrared bandpass filter |
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| Example 4: BP900-310nm Spectral Graph measurement- 750-1060nm infrared bandpass filter |
What is typical application for 900nm Bandpass Filter?
A 900nm bandpass filter is a precision optical element for isolating a specific spectral band centered at 900nm in the near-infrared region, with high rejection of all out-of-band wavelengths. It finds applications in laser characterization, NIR spectroscopy. Besides, it also support gas sensing, fluorescence microscopy, and machine vision.
What are key parameters when choose for a suitable Bandpass Filter?
When selecting a Bandpass Filter, normally the following factors need to be taken into consideration：
- Central Wavelength (CWL)：Firstly,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%, and 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:
910nm Bandpass Filter, 910nm CWL, 50nm FWHM, OD2, unmounted optical bandpass filter
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.
