Projector

G - Physics – 03 – B

Patent

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Details

G03B 21/10 (2006.01) H04N 5/74 (2006.01)

Patent

CA 2124466

A projector that has a shortened optical path from a light valve to a screen and a reduction in the depth size of its system and which requires less space to mount. Rays of light emitted from a light valve are refracted by a converging lens and reflected by a plane mirror to converge at the primary focal point of an elliptical mirror and then travel toward the secondary focal point whereat the focal point of a parabolic mirror also exists and a projection lens is disposed. The light rays pass through the projection lens, are reflected by the parabolic mirror and then brought to a parallel beam of light that is further collected by a Fresnel lens to finally form an image on a lenticular lens-screen.

Projecteur comportant un parcours optique plus court entre une valve de faisceau lumineux et un écran ainsi qu'une réduction de la profondeur de son système, et qui nécessite moins d'espace de montage. Les rayons lumineux émis par une valve de faisceau lumineux sont réfractés par une lentille convergente et réfléchis par un miroir plan, en vue d'assurer la convergence au foyer objet d'un miroir elliptique, et poursuivent ensuite leur trajectoire vers un foyer image où se trouve le foyer d'un miroir parabolique et un objectif de projection. Les rayons lumineux traversent l'objectif de projection, sont réfléchis par le miroir parabolique et sont dirigés ensuite vers un faisceau de lumière parallèle qui est capté par une lentille de Fresnel pour finalement former une image sur un écran-objectif lenticulaire.

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