Product Descriptions:
| Characteristics: | 450+815nm Dual Bandpass Filter |
| Type: | Interference type |
| Central Wavelength(in mm): | 450nm ± 5nm, 815nm ± 5nm |
| Peak Transmittance(%) : | >85% |
| Full Width at Half Maximum(FWHM) | 45nm |
| Optical Density (OD): | OD 2 – OD 3 |
| Shape: | Round, Square, Custom Shape |
| Color: | Blue |
| Angle of Incidence(AOI) | 0° , 45° or specified |
| 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： (1)Spectral range:350-1100nm (2) Size customized: 86x86mm, 80x80mm, other can customized, max. 300x300mm (3) Thickness available: 0.21、0.3、0.55、0.7、1.0、1.1、1.5、1.8、2.0、3.0mm…etc. | |
Measured Spectral Graph – 450+815nm Dual Bandpass filter:
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| Picture 1: 450+815nm Dual Bandpass Filter Spectral Graph measurement |
What is the difference between a Dual bandpass filter and a standard (single) bandpass filter?
The main difference between a dual bandpass filter and a standard bandpass filter is that a standard bandpass filter focuses on a single specific spectral passband, while a dual bandpass filter integrates two spectral channels into a single optical component.
What is 450+815nm Dual Bandpass Filter?
A 450nm + 815nm Dual Bandpass Filter is a specialized optical filter that allows two discrete wavelength bands to pass through simultaneously on the same optical substrate. Its core function is to efficiently transmit only the two specific bands centered at 450nm and 815nm, while blocking all other light outside these bands.
What is typical application for 450+815nm Dual Bandpass Filters?
450+815nm Dual Bandpass Filters serve in fluorescence microscopy and biomedical imaging, where they simultaneously isolate blue and near-infrared fluorescence signals. They also support flow cytometry, drug screening, and multi-color cell analysis. In addition, these filters function in machine vision and optical sensing systems, enabling simultaneous detection across two distinct spectral bands.
What are the core functions and features of a 450+815nm Dual Bandpass Filter?
The core functions and features of 450+815nm Dual Bandpass Filters include:
First, dual-channel transmission: Simultaneously transmits two wavelength bands—450nm (blue light) and 815nm (near-infrared light).
Second, dual-channel blocking: Blocks all other wavelengths outside these two bands, from ultraviolet to far-infrared.
Third, one filter replaces two: Substitutes for two separate filters, simplifying the optical system.
Fourth, no crosstalk: The two channels are isolated from each other without interference.
What is key parameter when choose for suitable a Dual Bandpass Filter?
When selecting a Dual Bandpass Filter, normally the following factors need to be taken into consideration：
- Central Wavelength (CWL)：Firstly, CWL is one of key parameter to designate, 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): it 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:
650&850nm Dual Bandpass Filter, 40nm FWHM,Day&Night Optical Filter
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