Dichroic Coatings
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An optical coating is one or more thin layers of material deposited on an optical component, such as a lens or a mirror. The coating alters the way in which the component reflects and transmits light. Dichroic coatings, also known as long pass/short pass coatings, are designed for application where wavelength separation of incident light in transmission and reflection is necessary. In other words, dichroic coatings are used to selectively pass light of a small range of wavelengths, while reflecting all other wavelengths.
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Dichroic Coatings: Selective Light Filtering
Dichroic coatings are optical coatings that selectively transmit and reflect specific wavelengths of light. These coatings are essential in applications requiring precise wavelength separation.
Functionality
Dichroic coatings utilize interference effects to reflect certain wavelengths while transmitting others. The design of the coating determines the specific wavelengths that are reflected or transmitted.
Applications
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Fluorescence Microscopy: Separates excitation and emission light paths.
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Optical Filters: Used in imaging systems to isolate specific wavelengths.
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Laser Systems: Controls the wavelength composition of the output beam.
Incorporating dichroic coatings into optical systems allows for precise control over wavelength selection and separation.