Primary Mirror Cell

The big 6.5 meter eye needs a big support system. Though we didn't get to see or install the primary mirror, we designed, fabricated and installed the 33,000 pound mirror support cell on the OSS. Large light reflecting telescopes require they're large mirrors to be able to deflect its parabolic surface in various zones to precise measurements in order to adjust and focus where the scientist needs to produce the best quality image possible. This is done by the use of sophisticated electronic force actuators mounted at the back side of the mirror. You will notice hundreds of precision holes machined on the flat face of the cell. This is where these actuators are mounted.

	Terry King, engineer in the basket
	Ready for packaging

Nasmyth Platform

The Nasmyth platform is used to allow technicians and scientists to gain access to install and change out various instruments including cameras on the rotating Nasmyth wheel shown in this photo.

 

Nasmyth platform nearing its final position.

 

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1) Viewing through the Nasmyth port of the center section. Clyde Taylor is installing

a counterweight representative of the mirror weight to facilitate testing in our shop.

2) Nasmyth bearing assembly in which the instrument wheel is mounted.

 

3) Textured platform surface.