A gonio-stage of the present invention comprises: a housing; a moving stage arranged on an upper surface of the housing and performing a circular movement in a first direction and a second direction; a driving motor installed at one side of the housing to generate a driving force; a driving force conversion unit installed between the driving motor and the moving stage to convert a rotational movement of the driving motor into a linear reciprocating movement; and a circular movement conversion unit installed between the housing and the moving stage to convert the linear reciprocating movement of the driving force conversion unit into a circular movement, wherein the circular movement conversion unit consists of support members mounted to both side surfaces of the moving stage respectively, a slide rail unit formed to protrude with a predetermined radius of curvature on both sides of an upper surface of the housing, first and second cam followers mounted to the support members to be able to rotate and coming in contact with a lower surface of the slide rail unit to be rolled, and a third cam follower mounted to the support members to be able to rotate and coming in contact with an upper surface of the slide rail unit to be rolled. Therefore, the radius of curvature of the slide rail unit can be freely manufactured, and manufacturing time and cost can be reduced.;COPYRIGHT KIPO 2020
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