Pop up prism lens assembly

G - Physics – 03 – B

Patent

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Details

G03B 15/03 (2006.01) G02B 13/16 (2006.01) G03B 13/00 (2006.01) G03B 17/04 (2006.01) H04N 5/225 (2006.01) H04N 5/232 (2006.01)

Patent

CA 2572507

A pop up prism camera (10) having a pop up prism lens assembly (11). A first lens assembly (14), a second lens assembly (18), and a prism assembly (21) are moved in relationship to a camera housing (12) controlled by a cam tube (20). The prism assembly (21) projects outside the camera housing (12) when the pop up prism camera (10) is in an operational configuration. A prism (100) of the prism assembly (21) redirects an optical path (48). A non-angled portion (44) of a first cam groove (30) causes the prism assembly (21) to remain fixed relative to the camera housing (12) while continued rotation of the cam tube (20) allows the first lens assembly (14) and the second lens assembly (18) to continue to move to accomplish a lens zoom function.

L'invention concerne un appareil photographique à prisme escamotable (10) présentant un ensemble lentille à prisme escamotable (11). Un premier ensemble lentille (14), un second ensemble lentille (18) et un ensemble prisme (21) sont déplacés par rapport à un boîtier (12) de l'appareil photographique, commandé par un tube à cames (20). L'ensemble prisme (21) s'étend à l'extérieur du boîtier (12) de l'appareil photographique, lorsque cet appareil photographique à prisme escamotable (10) est en état de fonctionnement. Un prisme (100) de l'ensemble prisme (21) redirige un trajet optique (48). Une partie non inclinée (44) d'une première rainure de came (30) pousse l'ensemble prisme (21) à rester stationnaire par rapport au boîtier (12) de l'appareil photographique, tandis que la rotation continue du tube à cames (20) permet au premier ensemble lentille (14) et au second ensemble lentille (18) de continuer à se déplacer pour exécuter une fonction de zoom.

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