Fluorescence filters are optical filters that are specifically designed to transmit certain wavelengths of light while blocking others. They are commonly used in fluorescence microscopy and other fluorescence-based imaging techniques.
Fluorescence filters consist of a combination of excitation and emission filters. The excitation filter is placed in the light path before the sample, and it selectively transmits the excitation wavelength of light that is used to excite the fluorophores in the sample. The emission filter is placed in the light path after the sample, and it selectively transmits the emitted fluorescence wavelength while blocking the excitation wavelength and other unwanted wavelengths.
The excitation filter is designed to have a high transmission at the excitation wavelength and a high blocking efficiency for other wavelengths. This helps to minimize background noise and maximize the signal-to-noise ratio. The emission filter, on the other hand, is designed to ha…