| 摘要 |
PURPOSE: A lens assembly for a robot eyeball is provided, which controls a focus of an image rapidly according to a distance variation between a lens and a subject. CONSTITUTION: The lens assembly for a robot eyeball includes a lens housing(47) and a main lens(32) installed in the lens housing. A flexible lens(36) is installed in an incident surface of the main lens, and an outer circumference of the flexible lens is expanded and contracted according to an extension of a flexible material in the inside. The flexible material is stored in a reservoir(40). A connection tube(38) connects the reservoir and the flexible lens. A heating cooling part(42) heats or cools the reservoir according to the input of a heating cooling control signal. A distance sensing part(60) outputs a distance sensing signal according to a distance between the subject and the lens. And a control part(70) outputs the heating cooling control signal established in advance according to the input of the distance sensing signal.
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