Multi-lens Imaging Device Capable Of Automatic Focusing And Method For Automatic Focusing

The invention relates to a multi-lens imaging device capable of automatic focusing and a method for automatic focusing. The device includes a plurality of lens assemblies and an electromagnetic actuator. The lens assemblies are fixed on a lens platform connected with a guide rod in a sliding manner....

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	FAN,KIN MING, CHENG,KWOK SING
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM CINEMATOGRAPHY CONVERSION OR DISTRIBUTION OF ELECTRIC POWER DYNAMO-ELECTRIC MACHINES ELECTRICITY ELECTROGRAPHY GENERATION HOLOGRAPHY OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHOTOGRAPHY PHYSICS
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Beschreibung
Zusammenfassung:	The invention relates to a multi-lens imaging device capable of automatic focusing and a method for automatic focusing. The device includes a plurality of lens assemblies and an electromagnetic actuator. The lens assemblies are fixed on a lens platform connected with a guide rod in a sliding manner. The electromagnetic actuator is used for changing the distance between the lens assemblies and the image sensors. The electromagnetic actuator includes a first magnet and a second magnet. If no current is applied to the electromagnetic actuator, magnetic forces between the second magnet and the guide rod may draw the lens platform to the guide rod. The friction force between the lens platform and the guide rod may retain the lens platform. The invention can adjust the magnification times and focusing of the imaging device.