What is a Bandpass Filter?
A bandpass filter is an optical filter designed to transmit a defined range of wavelengths while reducing light outside the selected transmission band. It is commonly used when a specific spectral range needs to be separated from a broader optical signal.
How Does an Optical Bandpass Filter Work?
A bandpass filter uses optical materials and thin-film coating structures to control spectral transmission. The filter allows the required wavelength range to pass through while attenuating wavelengths outside the transmission band.
Specifications of Bandpass Filter
| Size | 10mm × 10mm × 1mm |
| Transmission | Tmin > 95% |
| Material | Glass |
| Blocking Wavelength | 735–1200nm |
Picture of Optical Filter
Video of Bandpass Filter
Key Features
- Selective spectral transmission
- Defined passband characteristics
- Controlled center wavelength
- Accurate bandwidth control
- High optical transmission within the passband
- Effective attenuation outside the selected range
- High quality optical surfaces
- Custom coating and dimensional options
Optical Performance
The performance of a bandpass filter is determined by its center wavelength, bandwidth, transmission level, blocking range, substrate, coating design, and surface quality. These parameters can be optimized according to the requirements of the optical system.
Applications
- Optical measurement systems
- Spectral analysis equipment
- Imaging systems
- Machine vision equipment
- Laboratory optical instruments
- Color measurement systems
- Optical sensing equipment
- Light source analysis systems
Customization Options
- Center wavelength
- Passband width
- Transmission level
- Blocking range
- Substrate material
- Filter diameter or dimensions
- Surface quality
- Optical coating
- Edge processing
Manufacturing of Bandpass Filters
We provide precision manufacturing of optical bandpass filters according to customer drawings and spectral requirements. Substrate preparation, surface polishing, thin-film coating, dimensional processing, cleaning, and optical inspection can be controlled according to the required specifications.
People Also Ask (FAQs)
Can the transmission characteristics be customized?
Yes. Center wavelength, bandwidth, transmission, blocking range, and other spectral characteristics can be specified according to the required filter performance.
Why Choose Our Bandpass Filters?
- Precision spectral filter design
- Accurate wavelength control
- Stable optical transmission
- High quality optical substrates
- Precision thin-film coating
- Customized dimensions and specifications
- Strict optical performance inspection
- Prototype and production support
