Abstract: A video projector projects an image without reducing the resolution, onto the full dome surface by the use of a single-eye fisheye lens. The video projector has a single-eye fisheye lens for projecting a beam of light from an image display device onto the dome surface, a plurality of image display devices jointly uses the fisheye lens. The beams of light from the respective image display devices are combined and sent to the fisheye lens. Projected regions of images displayed on the respective image display devices correspond to certain sections of the dome surface. The projection image extends throughout the full dome surface.

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.

Abstract: Provision of a projector used for a planetarium which is capable of reducing electrical power consumption and size. The projector comprises a light source 1 constituted by an array of a plurality of light emitting diodes L for emitting illumination light. The emitted illumination light passes through a condenser lens 2 to impinge onto a original projection plate 3 provided with a light-permeable pattern P, and then a transmitted image is projected through a projection lens onto a dome screen.

Abstract: An image to be projected is deformed to obtain a projected image having small distortion. An image deforming device constituted by an optical fiber bundle is arranged in front of an original of a projector arranged at a position other than the center of a dome, so that the image of the original is transmitted from an end face on the incident side of an image correction device to an end face on the emission side as images divided into pixels using optical fibers as units. A secondary image subjected to predetermined deformation is displayed on the end face on the emission side, and the secondary image is projected on a dome surface to obtain a projected image which is free from distortion by the same manner as that performed when the original is projected from the center of the dome onto the same projection surface.