Holographic reproducing apparatus

G - Physics – 03 – H

Patent

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G03H 1/26 (2006.01) G11B 7/0065 (2006.01) G11B 7/135 (2006.01)

Patent

CA 2611231

A holographic reproducing apparatus capable of regulating aberration to a low level and suitable for reducing the size of the entire optical system is provided. When a forward meniscus lens is used for a converting lens 12 that collimates a reference beam L2, the converting lens 12 can be disposed between a light source 11 and the principal point Q of the converting lens 12 since the principal point Q of the lens is located at a position adjacent to a light-emitting surface 12a. With this, the distance between the light source 11 and a reflecting mirror 13 can be reduced, and thereby a reduction in the size of the optical system of a holographic reproducing apparatus 10 can be achieved.

Dispositif de reproduction de type hologramme supprimant l'aberration et permettant de réduire la taille d'un système optique dans son ensemble. Lorsqu'une lentille ménisque positive est utilisée en tant que lentille de conversion (12) pour convertir un faisceau de référence (L2) en un faisceau parallèle, étant donné que la lentille possède un point principal (Q) d'un côté d'un plan de sortie de lumière (12a), la lentille de conversion (12) peut être disposée entre une source de lumière (11) et le point principal (Q) de la lentille de conversion (12). Aussi, étant donné qu'une distance entre la source de lumière (11) et un miroir de réflexion (13) peut être raccourcie, la taille d'un système optique du dispositif de reproduction de type hologramme (10) peut être réduite.

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