A light pipe based projection engine

Details A light pipe based projection engine A light pipe based projection engine

F - Mech Eng,Light,Heat,Weapons

21

V

F21V 29/00 (2006.01)

Patent

CA 2528793

A light pipe based projection engine includes a X-prism (190, 192, 690, 692) transmitting substantially light of a useful polarization in an output direction (112) and reflecting substantially light of a non-useful polarization in a first orthogonal direction substantially orthogonal to the output direction (112), an initial reflector (114, 128) may reflect the non- said low, said medium, and said high bands of wavelengths (106, 108, 110) in a second orthogonal direction substantially orthogonal to the output direction (112) and the first orthogonal direction, and a final reflector (118, 132) may reflect the non-said low, said medium, and said high bands of wavelengths in the output direction (112), the non-said low, said medium, and said high bands of wavelengths may be rotated substantially to light of the useful polarization by the initial (114, 128) and final reflectors (118, 132).

L'invention concerne un moteur de projection à conducteur de lumière comprenant un prisme en X transmettant sensiblement une lumière de polarisation utile dans sens de sortie et réfléchissant sensiblement une lumière de polarisation inutile dans un premier sens sensiblement orthogonal au sens de sortie. Un réflecteur initial peut réfléchir des bandes de longueur d'onde inférieures, intermédiaires et supérieures dans un deuxième sens sensiblement orthogonal au sens de sortie et au premier sens orthogonal, et un réflecteur final peut réfléchir lesdites bandes de longueur d'onde inférieures, intermédiaires et supérieures dans le sens de sortie. Ces bandes de longueur d'onde inférieures, intermédiaires et supérieures peuvent être sensiblement mises en rotation par rapport à la lumière de polarisation utile au moyen des réflecteurs initial et final.

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