PLANETARIUM WITH SKYLINE PROJECTION DEVICE AND SKYLINE PROJECTION DEVICE

摘要

PURPOSE:To prevent the movement of skyline projected images when the the virtual axis is moved by separating a skyline projection device from a planetarium main body, and providing a rotary device on the skyline projection device, and to concurrently use the skyline projection device and a hemispherical motion picture device by providing lift devices respectively. CONSTITUTION:A skyline projection device 1 can be freely rotated around bearings on a fixed pedestal. The device 1 is driven by a drive motor, and electricity is fed through slip rings. Skyline lift devices 3 are vertically moved by three ball screws 24, the screws 24 are mechanically synchronized by a belt 23, or motors 25 are fitted to the ball screws 24 for electrical synchronization. For the mechanical synchronization between the devices 3 and a planetarium lift device 5, drive devices 29 of the devices 3 are driven by the motor 27 of the device 5 via a drive device 26 and a clutch 28. Drive motors 31 of the devices 3 are disengaged by clutches 30 at this time. For electrical synchronization, synchronous motors are used for the drive motors of the devices 3 and the device 5, and they are controlled by a computer at the same lifting speed.