Triple Bandpass Filters
Triple Bandpass Filters Introduction
1. Definition of Triple Bandpass filters
A triple-bandpass filter refers to a filter with three discontinuous wavelength bands that is highly transparent, such as a filter that transmits wavelengths near 430nm, 505nm, and 600nm, and cuts off other wavelengths.
2. Application of Triple Bandpass Filter
Application areas of Dual Bandpass Filter and Triple Bandpass Filter which involved are lidar, optical applications, 3D glasses, projection, astronomical observation, biomedical, fluorescence analysis, laser applications, surveillance, intelligent traffic solutions automation equipment, industrial laser and laser ranging, monitoring and security, infrared imaging, visual inspection, biometrics, biochemical analysis, beauty equipment and other fields.
3. The feature of VY’s Triple Bandpass Filter
1) Coating process of high-temperature evaporation
2) Technology of ion source-assisted coating
3) Hard- coated
4) Good firmness of coating
4. The basic parameters of triple band filters are as follows:
1) Material: K9/Quartz
2) Transmitting wavelength: as required
3) Transmittance: Tave>85%
4) Average Cutoff Depth: OD2
5) Surface Quality: 40/20
6) Appearance: can be made into round, square, special-shaped
7) Packing method: vacuum packing
People also want to know about bandpass filters.
1. What are bandpass filters used for?
In a receiver, a bandpass filter allows signals within a selected range of frequencies to be heard or decoded, while preventing signals at unwanted frequencies from getting through. A bandpass filter also optimizes thesignal-to-noise ratio (sensitivity) of a receiver.
2. What is a good bandpass filter?
An ideal bandpass filter would have a completely flat passband: all frequencies within the passband would be passed to the output without amplification or attenuation, and would completely attenuate all frequencies outside the passband. In practice, no bandpass filter is ideal.
3. How is bandpass filter calculated?
The centre frequency of the band pass filter which is also termed as ‘resonant peak’ can be formulated by using the below equation: fc = 1/2π√(LC) Where L = inductance of an inductor whose units are in Henry (H). C = capacitance of a capacitor whose units are in Farad (F).
