Wuhan Siwer Optics Co.,Ltd
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Bandpass filters are widely used in wireless transmitters and receivers. The main function of such a filter 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. Signals at frequencies outside the band which the receiver is tuned at, can either saturate or damage the receiver.
Additionally they can create unwanted mixing products that fall in band and interfere with the signal of interest. Wideband receivers are particularly susceptible to such interference. 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.
This is the transmission curve of the 820-1100nm band pass filter:
| Item | Size(mm) | Unit price(USD) |
| 850nm Narrow band pass filter | Φ4.2*1.1 | 10 |
| Φ4.5*0.55 | 10 | |
| Φ6*2 | 10 | |
| Φ8*0.55 | 4 | |
| Φ8*1.1 | 4 | |
| Φ10.4*1 | 5 | |
| Φ14*1 | 10 | |
| Φ15*1.1 | 10 | |
| Φ17*0.7 | 14 | |
| Φ20*0.55 | 14 | |
| Φ23*1.1 | 21 | |
| Φ25*0.55 | 14 | |
| Φ27*1.2 | 26 | |
| Φ29*1.7 | 26 | |
| Φ34*1 | 51 | |
| Φ37.5*1.2 | 26 | |
| 4.5*4.5*0.55 | 3 | |
| 6.2*6.2*0.5 | 3 | |
| 7*2*1 | 10 | |
| 8.2*8.2*0.55 | 4 | |
| 8.5*2*1 | 10 | |
| 10*10*0.55 | 5 | |
| 10*7.5*0.55 | 8 | |
| 14*14*1.1 | 8 | |
| 14*7*1.1 | 8 | |
| 16.9*16.9*1 | 21 | |
| 17*17*0.55 | 21 | |
| 17.8*17.8*0.55 | 21 | |
| 15.5*8*1.1 | 21 | |
| 23.5*15.6*1.1 | 21 | |
| 27*20*0.6 | 26 | |
| 30.5*23*0.6 | 26 | |
| 35*2*1 | 21 | |
| 37*8.2*0.55 | 14 | |
| 57*9*1.8 | 21 | |
| 80*14*1 | 51 | |
| 86*86*0.55 | 103 | |
| 8.2*8.2*1 | 7 | |
| 14*14*1 | 14 | |
| Item | Size(mm) | Unit price(USD) |
| 450nm narrow band pass filter | Φ3.5*1 | 14 |
| Φ5*1.5 | 10 | |
| Φ6.5*1.7 | 14 | |
| Φ8*1.1 | 17 | |
| Φ11.5*1.5 | 21 | |
| Φ15*1.5 | 21 | |
| Φ25*1.5 | 21 | |
| Φ30*1.5 | 21 | |
| Φ35*1.4 | 48 | |
| Φ36*1.5 | 48 | |
| Φ39*1.6 | 69 | |
| Φ45*1 | 86 | |
| Φ50*1.8 | 103 | |
| Φ51*1.5 | 103 | |
| 10*5*1.65 | 17 | |
| 14*14*1.1 | 21 | |
| 14*7.5*1.1 | 21 | |
| 14*8.1*1.1 | 21 | |
| 16.5*16.5*1.1 | 21 | |
| 18*18*1.7 | 21 | |
| 19.5*16.8*1.5 | 21 | |
| 30*5*1.1 | 21 | |
| 38*20*1.1 | 34 | |
| 39*23*2.2 | 48 | |
| Item | Size(mm) | Unit price(USD) |
| 625-665nm band pass filter | 4.8*2.6*1 | 10 |
| 6*4.6*1 | 3 | |
| 5*5*1.2 | 10 | |
| 6.5*6.5*1 | 3 | |
| 9*9*1 | 3 | |
| 10*10*1 | 10 | |
| 6*6*1 | 3 | |
| 9*9*1 | 3 | |
| 16*16*1.7 | 14 | |
| 16.5*16.5*1.1 | 21 | |
| 25*14*1.1 | 21 | |
| 30*30*1.7 | 21 | |
| Φ6*1 | 3 | |
| Φ8*1 | 3 | |
| Φ12*1.1 | 12 | |
| Φ16*1.1 | 12 | |
| Φ20*1.1 | 12 | |
| Φ24*1 | 14 | |
| Φ25*1.1 | 14 | |
| Φ26*1.1 | 14 | |
| Φ29*1.2 | 14 | |
| Φ30*1.1 | 14 | |
| Φ39*1.1 | 34 |
We can also customize specific filters according to your requirements.
We can also provide the filter holder. Here is the schematic diagram of our standard holder:
What's the way of shipping?
We accept DHL, Fedex, TNT, UPS, SF, EMS etc. If you have your own express account, it's great.
How to pay?
(1) T/T, PayPal, West Union,etc
(2) Bank Fee: West Union-USD30.00(≤USD3000.00),
T/T-USD20.00+, PayPal-5%. Please consult the local bank.
What's the deliver time?
For inventory: the delivery time is around 5 workdays.
Customized products: the delivery time is 10 to 30 workdays. According to the quantity and precision.
Can I customize the products based on my need?
Yes, we can customize the material, specifications and optical coating for your optical components based on your needs. OEM is available.