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The historic coelostat designed by Russell Porter in 1934 on the CalTech campus was restored and modernized as part of the overall laboratory building restoration. Resilvered mirrors were reactivated and programmed to once again track the solar disc. Reflected sun is beamed down the original octagonal shaft providing a real time image of the sun, direct beam for climate research, and light for fiber optic fixtures in below grade laboratories.

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DESIGNER
Loisos + Ubbelohde

Telescope Restoration
Dick Treffers

LOCATION
Pasadena, CA
CURRENT STATUS
In operation since 2012
AWARDS
2009 AIA East Bay Unbuilt Merit Design Award for Coelostat Re-Activation