Projection apparatus

G - Physics – 03 – B

Patent

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Details

G03B 21/00 (2006.01) G02B 6/08 (2006.01)

Patent

CA 2065376

A projection apparatus, comprising a fiber-optical plate (1), the entrance faces (2) of the light guides (3) of which coincide with the plane (a-a) of the image of the original, and a projection objective (8), the exit faces (9) of the light guides (3) of the fiber-optical plate (1) being disposed in the field of view thereof. An optical system (10) for concentrating the light rays into a light beam and directing that light beam into the entrance pupil (11) of the projection objective (8) is formed along the path of propagation of the light rays in each of the light guides (3) of the fiber-optical plate (1). The optical system (10) is formed by a focon (12), positive lens (13) and refracting prism (14), disposed successively along the path of the light rays in the light guide (3), while the optical axis (O3-O3) of the focon (12) and the optical axis (O4-O4) of the positive lens coincide with the optical axis (O1-O1) of the light guide (3).

Un projecteur comprend une plaque à fibres optiques (1) dont les faces terminales d'entrée (2) des guides de lumière (3) sont situées dans le plan d'image originale (a-a), ainsi qu'une lentille de projection (8) dans le champ optique duquel se trouvent les faces terminales de sortie (9) des guides de lumière (3) de la plaque à fibres optiques (1). Sur le chemin du faisceau de lumière de chaque guide de lumière (3) de la plaque à fibres optiques (1) se trouve un système optique (10) destiné à concentrer les faisceaux de lumière en un flux de lumière et destiné à orienter ledit flux de lumière dans l'oculaire d'entrée (11) de la lentille de projection (8). Le système optique (10) comprend un focon (12), un lentille convergente (13) ainsi qu'une lentille de réfraction (14), ces éléments étant montés successivement le long du chemin du faisceau de lumière dans le guide de lumière (3). L'axe optique (O4-O4) de la lentille convergente coïncide avec l'axe optique (O10O1) du guide de lumière (3).

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