Optical color filters selectively transmit light in a particular range of wavelengths (colors), while blocking the remainder. They can usually pass long wavelengths only (longpass), short wavelengths only (shortpass), or a bank of wavelengths, blocking both longer and shorter wavelengths (bandpass). The passband may be narrower or wider; the transition or cutoff between maximal and minimal transmission can be sharp or gradual.
Optical filters are commonly used in photography where some special effect filters are occasionally used as well as absorptive filters. They are also used in many optical instruments and to color stage lighting.
A few examples of optical color filters are:
To learn more about how optical color filters fit into your application, contact Swift Glass today.