Planetarium
AssigneeKabushikigaisya Goto Kogaku Kenkyujyo
InventorsTakamasa Sekiguchi, Yasushi Kuwahara, Takeshi Sugamata
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Abstract
A planetarium has a planet projection system comprising: a rotatable stage positioned concentrically with a precession axis of a fixed star projection globe and performing an X-axis motion; and a sleeve-type planet projector positioned at an eccentric position with respect to an X axis on the rotatable stage and performing a Y-axis motion for allowing a projection direction to vary upward and downward in relation to the rotatable stage. The X-axis and Y-axis motions are controlled on the basis of values calculated by a planet-movement operation unit receiving date and time data, to project the movement of planets.
Claims8
A planetarium, comprising:
- a fixed star projection globe;
- a main computer;
- and
- a planet projection system, including:
- a rotatable stage rotatably mounted on a fixed shaft, positioned concentrically with a precession axis of the fixed star projection globe or in proximity and parallel to the precession axis, to perform an X-axis motion;
- at least one sleeve-type planet projector positioned at an eccentric position with respect to an X axis on said rotatable stage and provided for a Y-axis motion for allowing a projection direction to vary upward and downward in relation to said rotatable stage;
- and
- a planet-movement operation unit for receiving date and time data from the main computer and controlling the X-axis motion and the Y-axis motion on the basis of the received date and time data.
Dependencies are inferred from the claim text.