| 摘要 |
PROBLEM TO BE SOLVED: To provide a planetarium apparatus which freely controls the brightness of each star, even when a lot of bright star projectors are installed as an optical projector, without increasing the number of components and with a simple configuration. SOLUTION: The light of a light source lamp 1 is changed into a linearly polarized wave by a polarizer 2 and enters a transmissive liquid crystal panel 3. Transmission of the transmissive liquid crystal panel 3 is controlled in association with the projection height of an object bright star in accordance with the data of projection height of the object bright star. The image formed by the transmissive liquid crystal panel 3 is focused on an input end of an optical fiber bundle 6 through an imaging lens 4. From the opposite side of the optical fiber bundle 6, each optical fiber 7 is connected to each bright star projection means. COPYRIGHT: (C)2009,JPO&INPIT |
