De-centered lens group for use in an off-axis projector

Details De-centered lens group for use in an off-axis projector De-centered lens group for use in an off-axis projector

G - Physics

02

B

G02B 27/18 (2006.01) G02B 13/16 (2006.01) G02B 27/14 (2006.01) H04N 5/74 (2006.01)

Patent

CA 2309930

A projection system (300) includes a collimating lens group (312) for collimating an imaging beam (320). The collimating lens group (312) has an optical axis (328) that is de-centered with respect to the axis (322) of the imaging beam (320). Further, the optical axis (328) of the collimating lens group (312) forms a non-zero angle with the axis (322) of the imaging beam (320). The de-centered collimating lens group (312) enables the use of more conventional projection optics, without the unacceptable displacement of the projected image.

L'invention concerne un système de projection (300) comprenant un groupe (312) de lentilles collimatrices en vue de la collimation d'un faisceau (320) imageur. Le groupe (312) de lentilles collimatrices possède un axe optique (328) décentré par rapport à l'axe (322) du faisceau (320) imageur. En outre, l'axe optique (320) du groupe (312) de lentilles collimatrices forme avec l'axe (322) du faisceau (320) imageur un angle non nul. Le groupe (312) de lentilles collimatrices décentré permet d'utiliser une optique de projection plus classique, sans déplacement inacceptable de l'image projetée.

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