Dichroic prism

A dichroic prism is a prism that splits light into two beams of differing wavelengths (colour).^[1] A trichroic prism assembly combines two dichroic prisms to split an image into 3 colours, typically as red, green and blue of the RGB colour model. They are usually constructed of one or more glass prisms with dichroic optical coatings that selectively reflect or transmit light depending on the light's wavelength. That is, certain surfaces within the prism act as dichroic filters. These are used as beam splitters in many optical instruments.^[2] (See: Dichroism, for the etymology of the term.)

^ Bass, Michael; Mahajan, Virendra N.; Optical Society of America, eds. (2010). Handbook of optics (3rd ed.). New York: McGraw-Hill. ISBN 978-0-07-149889-0. OCLC 318409251.
^ Bandyopadhyay, P. K.; Grovbr, O. P. (1987-06-01). "Study of Prism-Dichroic at 45° and 22.5° Angle". Journal of Optics. 16 (2): 42–43. doi:10.1007/BF03549164. ISSN 0974-6900.

[1] Bass, Michael; Mahajan, Virendra N.; Optical Society of America, eds. (2010). Handbook of optics (3rd ed.). New York: McGraw-Hill. ISBN 978-0-07-149889-0. OCLC 318409251.

[2] Bandyopadhyay, P. K.; Grovbr, O. P. (1987-06-01). "Study of Prism-Dichroic at 45° and 22.5° Angle". Journal of Optics. 16 (2): 42–43. doi:10.1007/BF03549164. ISSN 0974-6900.

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