What is an optical filter?

What is an optical filter?

An optical filter is a device that selectively transmits light of different wavelengths, usually implemented as a glass plane or plastic device in the light path, which is either heavily dyed or has an interference coating. The optical properties of an optical filter are completely described by its frequency response, which specifies how the filter modifies the magnitude and phase of each frequency component of the input signal.

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Guangxi  CORERAY Optical Communication Technology Co.,Ltd. is an enterprise specializing in the production of passive components for optical communication.The company is committed to the large-scale application of laser communication passive device manufacturing technology. 

We mainly provide Mechanical Optical Switch, Solid State Optical Switch, Large Port Optical Switch, Small Optical Switch, Optical Switch, Optical Filter, Mems Optical Switch, etc.


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An optical filter is a device or material that selectively or non-selectively alters the spectral distribution of a light beam. Absorption and interference filters are frequently used in colorimeters and abridged spectrophotometers.

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1. Optical elements capable of attenuating the intensity of light and changing spectral components. 2. Optical parts that can attenuate the intensity of light, change the spectral composition or define the vibration surface.

Filters are optical devices used to select the desired radiation band. A common feature of filters is that no filter can make the image of a celestial object brighter, because all filters absorb certain wavelengths, making the object darker.

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{keyword},MEMS optical switch is a micro-optical switch that made of the semiconductor material, which is generally used as movable micro-mirrors that can deflect optical signals from input to output fibers.

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{keyword}, Mechanical switches are similar to optical switches, but they have a much longer history. The key difference from the optical switch is their activation method.

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