Interference Filters

Interference filters are optical devices that selectively transmit specific wavelengths of light while blocking others. They work based on the principle of light interference, where layers of thin, sometimes dielectric, materials cause certain wavelengths to reinforce or cancel each other. As a result, only desired colors or frequencies pass through, making these filters useful in applications like cameras, telescopes, and scientific instruments for precise color selection and filtering out unwanted light. Their design allows for high efficiency and narrow bandwidth, ensuring clean and accurate spectral performance.