The optical system of the ELT showing the location of the mirrors

This diagram shows the novel 5-mirror optical system of ESO's Extremely Large Telescope (ELT). Before reaching the science instruments the light is first reflected from the telescope's giant concave 39-metre segmented primary mirror, it then bounces off two further 4-metre-class mirrors, one convex and one concave. The final two mirrors form a built-in adaptive optics system to allow extremely sharp images to be formed at the final focal plane.

An annotated version of this image is available here.

Credit:

ESO

About the Image

Id:eso1704i
Type:Artwork
Release date:18 January 2017, 16:00
Related releases:eso1704
Size:5000 x 2812 px

About the Object

Type:Unspecified : Technology : Observatory : Instrument
Category:E-ELT
Illustrations

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