Dichroic Filter Guide


Dichroic filters separate a broad spectrum of light into two components: a reflected component and a transmitted component. They provide the ability to select different bands from a spectrum and direct those bands to where they can either be used or discarded. Heat / UV control, color separation, and fluorescence microscopy are a few of the most common uses of dichroic filters.


Laser Beam Combining and Splitting

Dichroic laser beam combiners can efficiently combine or separate multiple laser beams at a 45° angle of incidence.

Longpass Filters

Dichroic Longpass Filters feature bands of very-low reflectance to create the transmission bands of the filters, and bands of very-high reflectance to create the blocking region of the filters.

Optical System Heat Control

Heat control dichroic filters are used to remove NIR heat from an optical system.

UV Water Purification

254 nm dichroic filters can be used to accurately monitor the UV water purifying effectiveness of mercury lamps in real-time.

Terahertz Visible Beamsplitting

The 2 in. Terahertz Visible Beamsplitter is designed to reflect terahertz wavelengths and transmit visible wavelengths.