Innovation Special Planetariums 9 - Carl Zeiss Planetariums
Innovation Special Planetariums 9 - Carl Zeiss Planetariums
Innovation Special Planetariums 9 - Carl Zeiss Planetariums
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Lower operating costs<br />
For star projection, we have reduced power consumption from<br />
2 x 105 W (halogen lamps) to 2 x 35 W (LEDs). The lower heat<br />
load further permits us to use lower-power fans, which give<br />
off lower noise. Last but not least this is somewhat friendlier<br />
to the environment. A point not to be disregarded is the extremely<br />
long life of the LEDs. According to the manufacturer’s<br />
specs, the luminous flux after 60,000 service hours is still<br />
about 70 % of the starting level. By contrast, the halogen bulb<br />
has a life of 1,000 hours at maximum. Thus, LEDs appreciably<br />
reduce the operating costs of the ZKP 4.<br />
Lumen Maintenance (%)<br />
1.2<br />
1<br />
0.8<br />
0.6<br />
0.4<br />
0.2<br />
Light output of the LED as a function of service life (manufacturer's data).<br />
LED fixed stars illumination<br />
device for ZKP 4.<br />
0<br />
1 10 100 1000<br />
Time (hours)<br />
10000 100000<br />
LEDs for Sun, Moon and Planets<br />
To adapt the projection of Sun, Moon and the planets to the<br />
improved quality of the starry sky, LEDs are used also for these<br />
celestial bodies. The natural colors of Sun, Earth and Mars are<br />
reproduced by means of color filters.<br />
Retrofitting possible<br />
To make the advantages of LED illumination available to users<br />
of a SKYMASTER ZKP 4 equipped with halogen lamps, we have<br />
designed a conversion kit for retrofitting LED lighting.<br />
Planetarium projector<br />
SKYMASTER ZKP 4 LED.<br />
SKYMASTER ZKP 4<br />
<strong>Innovation</strong> <strong>Special</strong> <strong>Planetariums</strong> 9, 2012<br />
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