1.Product Descriptions:
| Characteristics: | 550nm Bandpass Filter |
| Type: | Interference type |
| Central Wavelength (CWL): | 550±5nm |
| Full Width at Half Maximum(FWHM)： | 20/100/110nm or specified |
| Average Transmittance(%) : | BP550-20nm:>88% BP550-100nm:>85% BP550-110nm:>88% |
| Optical Density (OD): | OD2 – OD3 |
| Shape: | Round, Square, Custom Shape |
| Color: | Yellow-green |
| Angle of Incidence(AOI) | specified |
| Surface Quality: | 60/40 scratch-dig or specified |
| 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. | |
2.Measured Spectral Graph – 550nm Bandpass filter:
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| Picture 1: BP550-20nm Spectral Graph measurement |
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| Picture 2: BP550-100nm Spectral Graph measurement |
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| Picture 3: BP550-110nm Spectral Graph measurement |
3.What is typical application for 550nm bandpass filters?
A 550nm bandpass filter is a type of optical interference filter that only allows light centered at 550nm to pass through, while blocking all other wavelengths outside its specified transmission range. 550nm bandpass filters are used in many fields, including:
Life Sciences: In instruments like fluorescence microscopes and flow cytometers, it isolates specific fluorescent signals.
Analytical Chemistry: Used in spectrophotometers and colorimeters for precise quantitative analysis.
Astronomy: To enhance the contrast of planetary features and reduce the effects of light pollution.
Machine Vision: Used to improve contrast and reduce interference from ambient light in industrial inspection 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:
555nm Narrow Bandpass Filter, 555nm CWL, 20nm 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.
