Star projectors for planetaria

The invention relates to a projection device for star projections in planetaria in which a plurality of star projectors are provided in the wall of a substantially spherical housing in the center of which a light source is arranged. The projector mounts and/or the condenser lenses of the projectors...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	MEIER, LUDWIG
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES THEREFOR ADVERTISING APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND,DEAF OR MUTE CINEMATOGRAPHY CRYPTOGRAPHY DIAGRAMS DISPLAY EDUCATION EDUCATIONAL OR DEMONSTRATION APPLIANCES ELECTROGRAPHY GLOBES HOLOGRAPHY OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHOTOGRAPHY PHYSICS PLANETARIA SEALS
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Beschreibung
Zusammenfassung:	The invention relates to a projection device for star projections in planetaria in which a plurality of star projectors are provided in the wall of a substantially spherical housing in the center of which a light source is arranged. The projector mounts and/or the condenser lenses of the projectors preferably are polyhedrons. The sides of the polygonal condenser lenses have bevel edges via which they are contacting neighboring condenser, lens sides so that substantially no light losses are involved.