If you are unsure as to what bandpass filters are, they are typically used in electronics to allow for the passage of certain wavelengths while at the same time blocking other wavelengths from being able to pass through. If you think these may sound unnecessary, there are actually quite a few advantages to using optical bandpass filters.
Increased Performance
There is a definite performance increase when filters are used, especially when in conjunction with switches. The insertion loss that occurs is also quite low so this makes it a perfect type of lens to enable the very best in optical solutions.
Ease Of Design
While other types of lenses may be quite complicated in their nature, this is simply not so with the design of bandpass filters. There are typically two varieties as well as a version where the original two are sandwiched together. With other types of electronics, custom bandpass filters can be designed, but this is generally not needed when it comes to the optical variety.
Portability
One of the unsung benefits of optical lenses is that they are portable. You can bring them virtually anywhere with no fear of them being burdensome. When you use other types of filters, they may not be suitable to bring from location to location.
Power Gain
The asset of power gain is something that other filters simply do not possess. This aspect comes about because optical bandpass filters are active while other filters are non-active. If power gain is a feature that is important to you, then bandpass filters are a great option.
