Product Descriptions:
| Characteristics: | 450nm+550nm+650nm triple-bandpass filter |
| Type: | Interference type |
| Central Wavelength(in nm): | 450 ± 5nm, 550 ± 5nm, 650 ± 5nm |
| Peak Transmittance(%) : | >90% |
| Full Width at Half Maximum(FWHM): | 40nm |
| Optical Density (OD): | OD 2 – OD3 |
| Shape: | Round, Square, Customized |
| Angle of Incidence(AOI): | 0° |
| Surface Quality: | 60/40 scratch-dig |
| Dimension(mm): | Specified* |
| Thickness(mm): | 0.21、0.3、0.55、0.7、1.0、1.1、1.5、1.8、2.0、3.0mm…etc. |
| Substrates materials: | Ultra-clear glass,K9,BK7,B270,D2637T, Quartz Glass(Fused Silica) or other specified. |
| Spectral range(in nm): | 350-1100nm |
| *Remark: Size customized: 86x86mm, 80x80mm, other can customized, max. 300x300mm | |
Measured Spectral Graph – 450+550+650nm triple-bandpass filter:
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| Picture 1: 450+550+650nm triple-bandpass filter spectral graph measurement |
What is a Triple Bandpass filter？
A Triple-bandpass filter is an optical component that selectively allows light at three specific wavelength ranges, e.g. centered wavelengths around 450nm, 550nm, and 650nm to pass through, while blocking light at other wavelengths.
What is the difference between a triple-bandpass filters and a standard single bandpass filters?
The core difference between a triple-bandpass filters and a standard single bandpass filters are that a standard single bandpass filter focuses on a single specific spectral channel, while a triple-bandpass filter integrates three spectral channels into a single component. Besides Triple bandpass Filters, Liyuan optics can produce multiple bandpass filters include Dual Bandpass Filters, Four Bandpass Filters and Five Bandpass Filters.
What is typical application for 450nm+550nm+650nm triple-bandpass filters?
- Multicolor fluorescence microscopy imaging: This represents the quintessential application of triple-bandpass filters, especially within fluorescence microscopy platforms.
- Raman spectroscopy systems: Employed for multi-wavelength excitation or signal collection to enable molecular composition analysis of samples.
- Lidar systems: By detecting return signals across multiple discrete wavelength bands, these systems can acquire more comprehensive target characterization data.
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.
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 Filters, Shortpass Filters, Notch Filters, ND filters, Star filters and Optical sapphire block.
