| 摘要 |
The provision of a planetarium projector provided with a near-point light source for the projection of the star images and including means for mounting, and maintaining, a star projection sphere concentric with the underside of a hemispherical dome within which the projector means is operatively positioned, to provide a highly realistic, accurate reproduction of the heavens as they appear from a given observation point upon the surface of the earth. The planetarium projector means also includes optical projection means for the sun, moon and planets which includes means for eliminating parallax from these projectors due to their somewhat non-concentric placement relative to the projection dome. Still further, the utilization of a point light source provided with means for decreasing the intensity of the lamp toward that portion thereof responsible for the projection of the fixed star images in the equatorial regions of the projection dome provides a unique method of presenting a planetarium display characterized by a high degree of realism in the projected night sky.
|
