Camera with image reduction relay system

Details Camera with image reduction relay system Camera with image reduction relay system

G - Physics

03

B

G03B 17/17 (2006.01) G02B 13/00 (2006.01) G02B 17/08 (2006.01) H04N 5/225 (2006.01)

Patent

CA 2300392

A focal reducing lens system (5) reduces the image diameter of a conventional photographic objective lens system (2), so as to increase the relative aperture and hence the speed of the objective lens system (2). A high resolution image detector, such as a CCD sensor, may be placed at the focal plane (6) of the focal reducing lens system (5). The focal reducing lens system (5) can be based on a modified Hawkins and Linfoot system including a meniscus lens (8) and a spherical mirror (7). It may alternatively be based on Schmidt, Bouwers or Baker-Nunn lens systems.

Le système de lentille (5) réduisant la focale réduit le diamètre image d'un système de lentille (2) traditionnel photographique de façon à augmenter l'ouverture relative et par conséquent la vitesse de ce système (2). Un détecteur d'image haute résolution tel qu'un détecteur CCD peut être placé au niveau du plan focal (6) du système de lentille (5) réduisant la focale, ce dernier étant réalisé à partir d'un système de lentilles Hawkins et Linfoot modifié comprenant un ménisque convergent (8) et un miroir sphérique (7) ou à partir de systèmes de lentilles Schmidt, Bouwers ou Baker-Nunn.

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