The working principle of a dichroic mirror is based on the interference effect of thin films. By depositing multiple layers of thin films with different refractive indices on glass or other transparent substrates, a complex optical interference system is constructed. When light is incident on such a multilayer film structure, light of different wavelengths will be partially or completely reflected due to interference, while light of other wavelengths will pass through the lens. By precisely controlling the material, thickness, and number of layers of the film, a dichroic mirror can be designed that reflects only light within a specific wavelength range and transmits light of other wavelengths.
characteristic
High selectivity: A dichroic mirror can precisely control which wavelengths of light are reflected and which wavelengths are transmitted, making it very useful in spectral selective applications.
High efficiency: This type of mirror has high reflectivity and transmittance within its designed wavelength range, reducing the loss of light energy.
Heat resistance and chemical resistance: The material of the multilayer film can be selected to have high heat resistance and chemical resistance, making the dichroic mirror suitable for harsh environments.
A dichroic mirror, also known as a polarizing mirror or a color spectroscope, is a special type of optical lens that has the ability to selectively transmit certain wavelengths of light while reflecting other wavelengths of light. This characteristic enables dichroic mirrors to be widely used in various optical systems, such as spectroscopy, laser technology, microscopy imaging, optical filtering, and illumination technology.
application
Microscopic imaging: In fluorescence microscopy, a dichroic mirror is used to separate excitation light and fluorescence signals, ensuring that only the fluorescence signal of the sample enters the detector.
Projection technology: In a tricolor (red, green, blue) projection system, a dichroic mirror is used to synthesize or separate light of different colors to achieve full-color image projection.
Laser system: In a laser, a dichroic mirror can be used as a component to select a specific wavelength of laser output.
Optical filtering: In optical communication and spectral analysis, a dichroic mirror is used to filter out or select light signals of specific wavelengths.
The design and manufacturing of dichroic mirrors require precise optical engineering techniques to ensure their performance meets the requirements of specific applications. With the development of optics and materials science, the performance and application range of dichroic mirrors will continue to expand.