Single-beam, multicolor hologon scanner

摘要: A three-color laser scanner using a holographically-generated plane linear grating disk (hologon). The includes peripherally-arranged facets having identical multiplexed diffraction gratings. Each is formed from plural superimposed interference patterns accumulated by multiple exposures to light single monochromatic beam source. optimized diffract certain wavelengths in single, multichromatic (plural wavelength) input beam. diffracted output comprises respective wavelength components that simultaneously scan collinear fashion. Modulation of the incident allows expose multicolor image at plane.