Dual field-of-view optical imaging system with dual focus lens

Details Dual field-of-view optical imaging system with dual focus lens Dual field-of-view optical imaging system with dual focus lens

G - Physics

02

B

G02B 27/00 (2006.01) G02B 1/11 (2006.01) G02B 3/10 (2006.01) G02B 13/16 (2006.01) H04N 5/30 (2006.01)

Patent

CA 2750354

A dual field-of-view optical imaging system is provided for obtaining two images of a scene, each image having a different field of view. The dual field-of-view optical imaging system includes a frontal dual focus lens, the dual focus lens having a central zone of focal length fi producing a wide field-of-view image at a first focal plane and a peripheral zone of focal length I2 greater than fi producing a narrow field-of-view image at a second focal plane; and a detector for detecting and acquiring the wide field-of-view image and the narrow field-of-view image, the detector being movable along an optical path for selective positioning at the first focal plane or the second focal plane.

La présente invention porte sur un système d'imagerie optique à double champ de vision permettant d'obtenir deux images d'une scène, chaque image ayant un champ de vision différent. Le système d'imagerie optique à double champ de vision comprend une lentille de mise au point frontale, la double lentille de mise au point ayant une zone centrale de longueur focale fi produisant une image à large champ de vision sur un premier plan focal et une zone périphérique de longueur focale I2 supérieure à fi, produisant une image à champ de vision étroit sur un second plan focal ; et un détecteur pour détecter et acquérir l'image à large champ de vision et l'image à champ de vision étroit, le détecteur étant mobile le long d'un chemin optique pour un positionnement sélectif sur le premier plan focal ou le second plan focal.

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