Nanjing Co-Energy Optical Crystal Co Ltd
Optical Bandpass Filter is those filters that allow only a specific range of wavelengths of light. Light possessing bandwidth either above or below that particular point is not allowed to pass through the filter. The filter bandwidth is also known as the full width at half or maximum transmission.
We can describe these filters with two vital characteristics that are their wavelength and their bandwidth. The filter has a well-specified short wavelength cut on and a cut of with a long wavelength. Some filters discard a specific wavelength instead of allowing it to pass, and it is called a notch filter. Some of the bandpass filters are also easily tunable that allows choosing a specified wavelength. To understand the filter better, it's essential to know its working, development, and applications. How does it work? As we know, a bandpass filter is a mix of a long pass and a short pass filter. This filter's central wavelength is comprehended as the reckoning mean of wavelengths that is measured at half of the peak transmission. Then the value of FWHM is calculated as the bandwidth at 50% peak transmission. How is it build? These filters are made up of colored glass. They are a mix of the long pass as well as short-pass filters. Use of Bandpass filters: It is primarily used in telescopes used in astronomy and the excitation filters used in fluorescent microscopy. COE optics is one of the renowned suppliers of high-quality bandpass filters at the best rate.
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Cissy Zhu
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