Dichroic mirrors (also known as light combining mirrors, half mirrors, RGB light combining mirrors, stage laser beam splitting mirrors, laser split-speed synthesis mirrors). Dichroic mirrors are widely used in projectors, optical instruments, laser projection, scanners and other fields. Their characteristic is that the design wavelength splits the light beam into transmitted light and reflected light, which is almost completely transparent to the light of the transmitted wavelength. However, the light of the external reflection wavelength is almost completely reflected. The dichroic mirror has high reflection for light beams below the cutoff wavelength, and high transparency for light beams above the cutoff wavelength. Can be customized production according to customer's index requirements.

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