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Bandpass filter is a device that passes frequencies within a certain range and rejects (attenuates) frequencies outside that range.As one of the best optical bandpass filter manufacturers, we can provide ideal bandpass filters.
Optical glass such as K9, fused silica, sapphire, MgF2, silicon (Si), ZnSe, ZnS, etc. These materials possess high transmittance, low absorption, low scattering, uniform refractive index, and specific dispersion characteristics.
Precisely hemispherical. The machining precision of the center and radius of curvature of the sphere is extremely high.
The surface is precision polished to an optical grade of 10-5 to ensure image quality and reduce scattering and aberrations.
An AR coating is typically applied to the concave surface to maximize the transmittance of specific wavelengths of light (e.g. visible light) and reduce reflection loss.
Bandpass filters are widely used in wireless transmitters and receivers. The main function of such an optical filter glass in a transmitter is to limit the bandwidth of the output signal to the band allocated for the transmission. This prevents the transmitter from interfering with other stations. 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 the signal-to-noise ratio and sensitivity of a receiver.
In both transmitting and receiving applications, well-designed bandpass filters, having the optimum bandwidth for the mode and speed of communication being used, maximize the number of signal transmitters that can exist in a system, while minimizing the interference or competition among signals.
| Type No. | Centre Wavelength (nm) | Bandwidth (nm) | Tpeak (%) | Blocking Range (nm) | Blocking Depth |
|---|---|---|---|---|---|
| BPF-220/10 | 220 | 10 | >13 | 200-2000 | OD3 |
| BPF-254/10 | 254 | 10 | >20 | 200-2000 | OD3 |
| BPF-260/10 | 260 | 10 | >20 | 200-2000 | OD3 |
| BPF-266/10 | 266 | 10 | >20 | 200-2000 | OD3 |
| BPF-280/12 | 280 | 12 | >20 | 200-2000 | OD3 |
| BPF-302/12 | 302 | 12 | >20 | 200-2000 | OD3 |
| BPF-330/12 | 330 | 12 | >20 | 200-2000 | OD3 |
| BPF-340/10 | 340 | 10 | >50 | 200-1200 | OD5 |
| BPF-350/8 | 350 | 8 | >35 | 200-1200 | OD2 |
| BPF-352/10 | 352 | 10 | >45 | 200-1100 | OD5 |
| BPF-355/8 | 355 | 8 | >40 | 200-1200 | OD4 |
| BPF-355/10 | 355 | 10 | >50 | 200-1100 | OD4 |
| BPF-355/85 | 355 | 85 | >90 | 200-1000 | OD3 |
| BPF-358/13 | 358 | 13 | >55 | 200-1100 | OD4 |
| BPF-360/10 | 360 | 10 | >50 | 200-1100 | OD4 |
| BPF-360/12 | 360 | 12 | >50 | 200-1200 | OD4 |
| BPF-365/10 | 365 | 10 | >50 | 200-1100 | OD4 |
| BPF-365/40 | 365 | 40 | >60 | 200-1100 | OD4 |
| BPF-365/80 | 365 | 80 | >85 | 200-800 | OD3 |
| BPF-370/10 | 370 | 10 | >55 | 200-1100 | OD3 |
| BPF-375/10 | 375 | 10 | >55 | 200-1100 | OD3 |
| BPF-379/12 | 379 | 12 | >50 | 200-1100 | OD3 |
| BPF-387/10 | 387 | 10 | >60 | 200-1100 | OD3 |
| BPF-395/10 | 395 | 10 | >50 | 200-1100 | OD3 |
| BPF-400/10 | 400 | 10 | >55 | 200-1200 | OD4 |
| BPF-400/30 | 400 | 30 | >75 | 200-1100 | OD4 |
| BPF-405/10 | 405 | 10 | >55 | 200-1100 | OD3 |
| BPF-405/20 | 405 | 20 | >65 | 200-1200 | OD4 |
| BPF-410/8 | 410 | 8 | >50 | 200-1100 | OD4 |
| BPF-410/20 | 410 | 20 | >65 | 200-1200 | OD4 |
| BPF-410/25 | 410 | 25 | >90 | 200-1100 | OD3 |
| BPF-410/30 | 410 | 30 | >85 | 200-1100 | OD5 |
| BPF-412/10 | 412 | 10 | >56 | 200-1200 | OD4 |
| BPF-415/10 | 415 | 10 | >60 | 200-1200 | OD4 |
| BPF-415/20 | 415 | 20 | >60 | 200-1200 | OD4 |
| BPF-415/55 | 415 | 55 | >85 | 200-800 | OD4 |
| BPF-418/10 | 418 | 10 | >60 | 200-1200 | OD4 |
| BPF-420/10 | 420 | 10 | >50 | 200-1100 | OD4 |
| BPF-420/22 | 420 | 22 | >85 | 200-1100 | OD3 |
| BPF-425/10 | 425 | 10 | >65 | 200-1200 | OD4 |
| BPF-427/10 | 427 | 10 | >70 | 200-1200 | OD5 |
| BPF-435/10 | 435 | 10 | >55 | 200-1100 | OD5 |
| BPF-440/10 | 440 | 10 | >50 | 200-1200 | OD4 |
| BPF-445/10 | 445 | 10 | >70 | 200-1200 | OD4 |
| BPF-447/10 | 447 | 10 | >50 | 200-1200 | OD4 |
| BPF-450/10 | 450 | 10 | >55 | 200-1200 | OD4 |
| BPF-450/50 | 450 | 50 | >60 | 200-1200 | OD4 |
| BPF-450/30 | 450 | 30 | >90 | 200-1100 | OD3 |
| BPF-450/50 | 450 | 50 | >90 | 400-800 | OD3 |
| BPF-450/100 | 450 | 10 | >75 | 200-1200 | OD3 |
| BPF-455/10 | 455 | 10 | >60 | 200-1200 | OD4 |
| BPF-456/10 | 456 | 10 | >75 | 200-1200 | OD4 |
| BPF-460/20 | 460 | 20 | >85 | 200-1200 | OD3 |
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