Telescopes

Simonyi Survey Telescope

<a few notes.>

Mirrors

The telescope has three reflective surfaces in the light path: the primary (M1), secondary (M2), and tertiary (M3) mirrors. M1 and M3 are formed out of a single piece of glass (M1M3) but have different curvatures. M2 has a 1.8 meter aperture in the center to allow light to pass to the camera.

Mirror sizes:

• M1: 6.7 meter effective diameter
• M2: 3.4 meter diameter (convex)
• M3: 5.0 meter diameter
• M1M3: 8.4 meter diameter

Etendue (integrated throughput, a measure of survey capability), defined as collecting area times the solid angle of the field of view, is 319 meters squared degrees squared for the design of the telescope and the LSST Science Camera.

M1M3 and M2 are coated with four layers. An adhesion layer of nickel-chromium (NiCr), a reflective layer of silver (Ag), another NiCr adhesion layer, and a final protective layer of silicon nitride (Si3N4).

Go to the mirrors page for a public audience.

Auxiliary Telescope

AuxTel