Ultra-wide field of view, broad spectral band helmet visor...

G - Physics – 02 – B

Patent

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Details

G02B 27/01 (2006.01) G02B 5/04 (2006.01) G02B 27/00 (2006.01)

Patent

CA 2148580

An optical display system in which an image is projected onto a combiner surface (4) at a significant bending angle .theta. effectively compensates asymmetric aberrations, including quadratic, linear and constant binodal astigmatism components and both linear and constant coma components. Forward and rear optical lens relay groups (14, 16) are positioned between an image generator (6, 8) and the combiner surface. The two relay groups are independently decentered and angularly tilted to increase the degrees of freedom available for aberration compensation. The lenses (24, 26, 28, 30, 32, 34, 36, 38, 40) included in the two relay groups are also designed to compensate for chromatic aberrations, thus allowing for the use of a broad bandwidth combiner and an operating bandwidth that encompasses substantially the full visible spectrum. The reduction in aberrations makes possible a significant increase in the system's field of view.

Un système d'affichage optique dans lequel une image est projetée sur une surface d'optique de mélange (4) selon un angle de flexion .theta. significatif compense efficacement des aberrations asymétriques, y compris des composantes quadratiques, linéaires et constantes d'astigmatisme binodal et des composantes de coma à la fois linéaires et constantes. Des groupes de relais constitués par des lentilles optiques avant et arrière (14, 16) sont placés entre un générateur d'image (6, 8) et la surface d'optique de mélange. Les deux groupes de relais sont décentrés indépendamment et inclinés augulairement, afin d'augmenter les degrés de liberté disponibles pour la compensation des aberrations. Les lentilles (24, 26, 28, 30, 32, 34, 36, 38, 40) comprises dans les deux groupes de relais sont également conçues pour compenser des aberrations chromatiques, ce qui permet d'utiliser une optique de mélange à large bande et une largeur de bande opérationnelle enveloppant sensiblement la totalité du spectre visible. La diminution des aberrations permet d'augmenter considérablement le champ de vision du système.

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